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Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. - Car Talk (2) - Nairaland

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Sachi Motorsport Audi A8 D3 4.2 Quattro Sport, Family Cruiser, V8 Content! / t-die's 2002 Audi A4 B6 (3.0 V6) Quattro Sedan Restoration Project. / Siena's Project B6 Audi A4 Quattro - First Pictures. (1) (2) (3) (4)

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Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 11:15am On Aug 12, 2012
And lastly...











Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by omoabike: 4:27pm On Aug 22, 2012
Hello Siena,
Sorry to derail your thread.I posted this message in February this year. I did not get any response from anyone. As it is now it is very urgent that I get an expert advice before proceeding on this issue.

I have urgent need for an advice from the Auto Buffs here. I have a 2002 TOYOTA TACOMA Automatic Transmission which I have just been informed have issues with the Reverse gear which has stopped working.
It is a long story but I will keep it short, this vehicle is being driven by my brother since I do not live in Nigeria. It was bought at around 158,000 miles last year. It has around 180,000 miles since my brother due to the nature of his job was always doing intercity trips with the pickup.
His idea of service for the vehicle is just to change the engine oil every month and even after warning him several times he still continued doing this. I had a feeling the transmission fluid probably is down and this may have caused the issue. However, I do not know much about vehicles myself and will need your advice on the way out.
Do we need to change the transmission to manual as some mechanics have advised him? This I am not interested in as I do not like driving manual vehicle since I drive the same vehicle whenever I am in Naija myself.
If the issue is the transmission, what do you advised I do? Is it repairable or do we need to change it completely. Your candid advice would be much appreciated.
Thank you


Please your advice is going to be greatly appreciated as I need to make a decision on the vehicle in the next couple of days.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Wallie(m): 9:20pm On Aug 22, 2012
Oh no!!!! The steering wheel is on the wrong side! grin

What is the biggest size wheel you can fit on the car? I would think that you're trying to get as much rubber as possible assuming no rules against going bigger?

Also, do you know how much heavier than the 1.8 the 4.2 engine is? I would think as much rubber as possible on the front wheels will probably negate some of the understeering that will result from increasing the nose-weight. What do people who are not limited by rules do?
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 11:00pm On Aug 22, 2012
Wallie: Oh no!!!! The steering wheel is on the wrong side! grin

What is the biggest size wheel you can fit on the car? I would think that you're trying to get as much rubber as possible assuming no rules against going bigger?

Also, do you know how much heavier than the 1.8 the 4.2 engine is? I would think as much rubber as possible on the front wheels will probably negate some of the understeering that will result from increasing the nose-weight. What do people who are not limited by rules do?

Yeah, RHD, lol. wink

The largest size wheels the Audi A4 quattro B5 takes is 8.5" x 18" with 245/35 x 18" rubber. I'm not restricted by any rules, so the sky's the limit. Some folk run 9" x 19" wheels on their road cars, but handling suffers.

The 4,2 V8 32V engine is all-aluminium, with a dry weight of 250 kgs. This compares favourably with the 2,6 V6 12V engine, which has a cast-iron block, with a dry weight of 235 kgs. So very little weight gain, and with all non-essentials stripped off, lighter than even a regular 1,8 20V non-turbo FWD A4 in full road trim.

Understeer characteristics shouldn't be an issue, as I'm installing the V8 engine further back in the chassis, so the proportion of the engine in front of the suspension centreline won't be any more than that of the out-going V6. The suspension set-up will also be custom, with the new engine and transmission layout and power in mind.

As this car is AWD, it's not a wise move running different size wheels / tyres front and rear, as handling pecularities will occur.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 11:03pm On Aug 22, 2012
omoabike: Hello Siena,

Please your advice is going to be greatly appreciated as I need to make a decision on the vehicle in the next couple of days.

Brother Omoabike, I'll give this some thought, do some research, and give you a response tomorrow, if that's okay by you. I hope it won't be too late!
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by omoabike: 11:29am On Aug 23, 2012
Siena:

Brother Omoabike, I'll give this some thought, do some research, and give you a response tomorrow, if that's okay by you. I hope it won't be too late!

Chief Siena,
Tomorrow is fine with me. I will appreciate your response.
Thank you so much
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Emperoh(m): 12:24pm On Aug 24, 2012
omoabike: Hello Siena,
Sorry to derail your thread.I posted this message in February this year. I did not get any response from anyone. As it is now it is very urgent that I get an expert advice before proceeding on this issue.

I have urgent need for an advice from the Auto Buffs here. I have a 2002 TOYOTA TACOMA Automatic Transmission which I have just been informed have issues with the Reverse gear which has stopped working.
It is a long story but I will keep it short, this vehicle is being driven by my brother since I do not live in Nigeria. It was bought at around 158,000 miles last year. It has around 180,000 miles since my brother due to the nature of his job was always doing intercity trips with the pickup.
His idea of service for the vehicle is just to change the engine oil every month and even after warning him several times he still continued doing this. I had a feeling the transmission fluid probably is down and this may have caused the issue. However, I do not know much about vehicles myself and will need your advice on the way out.
Do we need to change the transmission to manual as some mechanics have advised him? This I am not interested in as I do not like driving manual vehicle since I drive the same vehicle whenever I am in Naija myself.
If the issue is the transmission, what do you advised I do? Is it repairable or do we need to change it completely. Your candid advice would be much appreciated.
Thank you


Please your advice is going to be greatly appreciated as I need to make a decision on the vehicle in the next couple of days.

Omo,

I will share with you a little experience i just had with auto transmission.
I just bought a Chevy van for a client and it came in with a bad gear. After running helter skelter in search of solution,
i wanted to do the sanest thing that my mind told me; change the gear box. Not converting to manual like you are thinking.

I had almost paid for a replacement gear box; in fact i had deposited about N10,000.
But somehow, a solution came. My uncle's driver brought their Company technician to come and look at the gear
and promised me with guarantee he could fix it. The charge was quite high but way lower than doing a transmission change.

On dropping the gear, it happened that silt and dirt clogged the transmission filter hence the system wasn't getting enough transmission oil
You know the next situation. It burnt the drive (D) plate with the clutches in it. What happens is that; you engage (R) and it goes smoothly
But (D) will initially enter sluggishly and can only move with a very high rev. Then transmitting to other gears was with a jarring effect.
Eventually, it won't even enter at all.

So all i had to do was to drop the gear and change the (D) plate, serviced the system and cleaned up the filter.
The bus was test driven last nyte and it was a seamless drive.

I suspect this will be the same issue with your system but this time, the reverse plate.
But if it is a complete fiber burn, you will need another auto transmission box or get someone to fix it with a guarantee but it won't last.
I will vehemently advice you against changing the system to manual drive as you are suggesting.

I will allow the gurus in house to dissect the issue further.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 10:39am On Aug 26, 2012
omoabike: Hello Siena,
Sorry to derail your thread.I posted this message in February this year. I did not get any response from anyone. As it is now it is very urgent that I get an expert advice before proceeding on this issue.

I have urgent need for an advice from the Auto Buffs here. I have a 2002 TOYOTA TACOMA Automatic Transmission which I have just been informed have issues with the Reverse gear which has stopped working.
It is a long story but I will keep it short, this vehicle is being driven by my brother since I do not live in Nigeria. It was bought at around 158,000 miles last year. It has around 180,000 miles since my brother due to the nature of his job was always doing intercity trips with the pickup.
His idea of service for the vehicle is just to change the engine oil every month and even after warning him several times he still continued doing this. I had a feeling the transmission fluid probably is down and this may have caused the issue. However, I do not know much about vehicles myself and will need your advice on the way out.
Do we need to change the transmission to manual as some mechanics have advised him? This I am not interested in as I do not like driving manual vehicle since I drive the same vehicle whenever I am in Naija myself.
If the issue is the transmission, what do you advised I do? Is it repairable or do we need to change it completely. Your candid advice would be much appreciated.
Thank you


Please your advice is going to be greatly appreciated as I need to make a decision on the vehicle in the next couple of days.

Quite a lot of issue with the Toyota Tacoma, which is pretty strange for any Toyota model. There's more here:

http://townhall-talk.edmunds.com/direct/view/.f0de869/0

I spoke to the Service Manager at Currie Motors, Barnet, West London. Currie Motors is a Toyota Dealership. If the reverse gear no longer works, then it's unlikely to be an issue that fresh fluid will solve. Dirty / low ATF will affect all gears, though it can be argued that reverse gear requires different control pressure to engage it.

The most likely culprit is a broken reverse gear drum, or burnt-out clutch band. Either way, repairs will require the transmission to be pulled. It may be possible to replace the defective parts in situ, though I doubt it. Certainly in an Audi, the whole casing needs to be opened up. In Nigeria, your options are somewhat limited, it'll be best to ship in a decent replacement transmission. Repairs to auto transmission is a specialist job, due to absolute cleanliness requirements, and lots of minute measurements that need to be taken. The tolerances built in are very fine, unlike with manual, whereby they're more forgiving of mistakes made.

By all means, try an ATF change, it wouldn't do any harm, and all the best.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 10:47am On Aug 26, 2012
Update 24th August 2012:

I purchased an aluminium radiator for the B5. I'm currently putting together a kit to relocate the oil filter, and also allow the fitment of a regular spin-off metal item. I'm using a B6 3,0 oil filter.

This kit also allows me to run an air-to-air oil cooler, with thermostatic control. I've gone for a 20-row unit. I may well fit a small cooling fan, if I can find one that will fit easily.

My aluminium radiator was delivered by courier. Quite well-made, and is a direct replacement for B5 A4 and S4, that have both pipes on the passenger's side. My S8 engine has both pipes on the driver's side. I could invert the radiator to suite, but then the drain bung, and thermo-switch will be at the top, not good.

I'm going to get the outlets transferred on the radiator, just needs a competent aluminium welder, which I have. And a slight change of plan - I'm installing the radiator in the regular location, at the front. But will be mounted more towards the grille, so the cooling fans can be installed on the engine side. More superior cooling, than if the fans were mounted on the grille side (push fans).
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 11:09am On Aug 26, 2012
Audi A4 / S4 B5 radiators vary in core thickness, but the width between the end tanks is 24" in all models. Yes, that includes the 2,5 TDI and S4.

This radiator is wider than stock, but still fits in the OEM location. I have a pair of 12" fans, which just fit the stock rad. In this case, it fits with room to spare, which is awesome.

Pictures:










Last picture with a pair of 12" fans, just for reference. I won't be using these fans though, they don't pull enough air, I'm using a beefier pair from a 2001 Range Rover 4,6 HSE P38.

Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by kenzspunpy(m): 4:07pm On Sep 01, 2012
The most revered Siena, sorry to delay your thread. I guess I could only get a speedy response from you by posting this on your thread. grin. I am about to purchase this Audi A4 vehicle [sup][/sup] but unfortunately neither I nor the seller could give accurate details of its model and specs. I could attach pix from the device im using but it looks just like the Audi A4 u have here. Please help with the details. The car I'm referring to was brought from Cotonou and has never been used in Nigeria. It's going for 720k. Is it worth the price? Pls respond ASAP. Thanks...
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 5:16pm On Sep 01, 2012
kenzspunpy: The most revered Siena, sorry to delay your thread. I guess I could only get a speedy response from you by posting this on your thread. grin. I am about to purchase this Audi A4 vehicle [sup][/sup] but unfortunately neither I nor the seller could give accurate details of its model and specs. I could attach pix from the device im using but it looks just like the Audi A4 u have here. Please help with the details. The car I'm referring to was brought from Cotonou and has never been used in Nigeria. It's going for 720k. Is it worth the price? Pls respond ASAP. Thanks...

No worries, brother. Do you have a VIN, and/or pictures? That will give me an indication of what year and spec it is, and if it's an European or American vehicle.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 9:31pm On Sep 01, 2012
Update 1st September 2012:

In preparation to mating the S8 engine to my 01E 6-speed manual, to install in the first phase of my DTM build, I decided to freshen up the 01E transmission. I removed the light surface corrosion, gave it a thorough degrease and wash.

I then gave the entire casing a swab with a microfibre cloth, soaked in gasoline. Next step was three coats of grey primer. The final color will be as Audi made it - the bellhousing (aluminium) in satin black, the centre gear carrier (cast iron) silver, and finally, the Torsen central differential housing (aluminium) satin black.

The grey primer has been applied, tomorrow the final colors will be applied, I'm leaving it all to sit overnight. Pictures below - the first two show it as it was, the following 4 show it primered:














Pictures of finished product will be posted tomorrow.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by kenzspunpy(m): 4:24pm On Sep 02, 2012
Sir Siena, this is the VIN for the Audi as requested. Wauzzz8dzta011528. I will appreciate a speedy response as I'm due to pay tomorrow. Thanks boss
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 5:19pm On Sep 02, 2012
Update 2nd September 2012:

Yesterday, I laid down three coats of grey primer, on my 01E 6-speed manual transmission. Today, before leaving for Sunday Service, I applied two coats of Aluminium Silver to all the areas that were silver from the factory, and left it to bake under ultra violet light.

On my return, I carefully masked all the now dry Aluminium Silver areas, then laid down two even coats of Satin Black. I then gave it a three-hour bake, removing the masking an hour later. The results speak for themselves. It looks just as Audi made it back in 2001, probably better.

Pictures:












Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 5:33pm On Sep 02, 2012
kenzspunpy: Sir Siena, this is the VIN for the Audi as requested. Wauzzz8dzta011528. I will appreciate a speedy response as I'm due to pay tomorrow. Thanks boss



It's an early car, model year is '96, so it may well have been built in '95. It's a 1,8 20V front-wheel-drive, 125 hp. Given the spec is pretty basic, I'd be looking at 450 - 500,000 Naira. I certainly wouldn't pay any more, 500,000 Naira is for an average mileage car, not one that's been to the moon and back, and with decent bodywork and interior.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by kenzspunpy(m): 6:13pm On Sep 02, 2012
Thanks a lot boss...... Will sure have a re-think about payment , even though I really urgently need a car and I want an audib A4. I really appreciate your help Monsieur Siena. Gracias!!
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by mastro: 2:20pm On Sep 03, 2012
very nice Sienna, I trust you are aware that though many of us don't comment we are following your build with interest

1 Like

Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 6:50pm On Sep 03, 2012
^^^ Hey Mastro, that's okay, hope you're doing great.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by tdie: 7:38pm On Sep 03, 2012
Hi Siena; sorry to derail your thread, but could you please look at the Peugeot thread, I need your input on some issues (I know you're not a peugeot mech, but this is more of a general engine problem).
Thanks a million Boss
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 8:04pm On Sep 03, 2012
^^^ No worries, I'll take a look.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by jeezybuck: 7:38am On Sep 04, 2012
Keep it going boss
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 10:07pm On Sep 04, 2012
Update 4th September 2012:

My clutch friction disc and throw-out bearing arrived today. Just looking at different pressure plates, then will order one.

I pulled that ugly Bottom oil filter and cooler combo. Gosh! That thing's heavy! I didn't weigh it, but I won't be sorry to see it go.

The idea is to run a remote oil filter housing, utilizing a regular spin-off metal canister type of filter. I've opted for a B5 S4 filter. I'm not a fan of the water-cooled oil coolers, I've replaced several that have ruptured internally, filling the oil pan with coolant. An air-to-air one will be sourced, with a thermostatic oil filter head.

Surprisingly, the gremlin of the D2 - the plastic pipe that hardens, becomes brittle and breaks was still intact, and the O-rings were in great shape. The oil cooler cassette itself was still good.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 9:53pm On Sep 22, 2012
Update 22nd September 2012:

I began the interior strip-down of my Audi A4 quattro. I started with the leather interior which has been sold, (the buyer came down to pick it up) and as the weather was good, decided to carry on. So the pile of unwanted parts grew larger, and the car got lighter.

What I tore out:

*Leather interior.
*Door cards.
*Centre consoles.
*Audio system - head unit, Sony 10-disc changer, speakers, remote toggle and all leads.
*Carpet.
*Roof lining.
*Sun visors.
*Roof grab handles.
*All interior trim around the roof, including A, B and D pillar trim.
*Glove compartment.
*Under steering column compartment.
*Rear seat belts.
*Luggage compartment carpet, including sides and lid trim.

Still a lot to do, but we're getting there. Pictures speak volumes:


























Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 9:51pm On Sep 24, 2012
As this is going to be a race car, I have definitely decided to have the radiator and fans in the trunk. The next step is to cut out the spare wheel well. I will then begin construction of the under-car air duct, to draw air through the radiator, and the exit duct, which will be built into the rear bumper, which will have a custom diffuser.

Pictures to follow.

1 Like

Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 9:09pm On Sep 26, 2012
Update 26th September 2012:

Today, I picked up the oil cooler / filter relocating adapter flange. It's quite well-made, and being aluminium like the S8 engine it's being bolted to, won't react. Aluminium and steel mated together tend to corrode between the contact faces.

The couplings will allow me to locate the oil cooler and filter remotely. I'll have the oil lines made out of stainless steel braid, with a PTFE inner core. I'm left with a hole in the block though, where the original water-cooled oil cooler pipe went in. This will be plugged with an aluminium core plug.

Pictures below:


Flange, couplings and O-rings:





S8 engine, with the combined oil cooler and filter removed:



S8 engine, with adapter flange and couplings bolted in place:



Hole in block, that will need to be plugged up with a core plug:

Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by platinumricky(m): 3:44am On Sep 27, 2012
*gets a seat* waiting for the nxt post with images..
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Dr9ce(m): 11:14am On Sep 27, 2012
kudos mr sienna...u are doing a very great job by getting us informed..giving us knowledge wch actually is power.i m sori to derail ur thread but i do not know a better way to get ur attention...pls wat car wld u advise me to get with a budget of 750k....probably a toyota or honda or nissan.somebody also said something abt rover 600 .....i dnt know much abt d car.again, wats ur take on nigerian used cars?
looking fwd to getting ur ever reassuring and intelligent reply.
dr9ce.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 11:54am On Sep 27, 2012
^^^ No worries bro.

Your budget of 750,000 Naira would net you a Nigerian used '98 Toyota Camry, a '99 - '00 Honda Accord, an '00 Honda Civic, an '00 Toyota Corolla.

The Rover 600 is actually a rebadged Honda Accord, so will have Honda reliability. Your budget would source you a last-of-the-line Tokunbo Rover 600. It's an underrated car, so cheaper to buy, and excellent value for money. The last Rover 600 models were produced in 1999, though if you search properly, you can get one registered as late as 2000 / 2001.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Dr9ce(m): 2:18pm On Sep 27, 2012
thanks mr siena...more power to ur elbow...m most grateful!
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by ba7man(m): 2:03pm On Sep 28, 2012
Good day Mr Siena, been following this project of yours for a while now nd i think you should consider building a Nigerian branded vehicle in the future. Even if its a prototype. Sir, how fast do you reckon ur finished work will go...like 0-62mph, 0-100mph?? Considering the Hp of the S8 engine and your target weight. Eagerly awaiting these results.
Re: Sachi Motorsport - Audi A4 Quattro DTM Race Car Build. by Siena(m): 2:41pm On Sep 28, 2012
ba7man: Good day Mr Siena, been following this project of yours for a while now nd i think you should consider building a Nigerian branded vehicle in the future. Even if its a prototype. Sir, how fast do you reckon ur finished work will go...like 0-62mph, 0-100mph?? Considering the Hp of the S8 engine and your target weight. Eagerly awaiting these results.

Thanks for your comment bro. Building a Nigerian-branded car will require starting from scratch. Even if the engines are out-sourced, the bodyshell is the hardest part. But who knows what the future holds?

As per the acceleration times, stock Audi S8 times as per Audi's figures below:

Audi S8 4,2 V8 32V, 340 bhp 5-speed tiptronic, 1,858 kgs, 0 - 62 mph (100 km/h): 6,6 secs.
Audi S8 4,2 V8 32V, 340 bhp 6-speed manual, 1,750 kgs, 0 - 62 mph (100 km/h): 5,4 secs.

Audi S8 5-speed Tiptronic power-to-weight ratio is 183 bhp / ton. (brake horse power divided by weight) so 340 hp / 1858 kgs.
Audi A4 B5 6-speed manual power-to-weight ratio is 340 bhp / ton. (brake horse power divided by weight) so 340 hp / 1000 kgs.

So I'm estimating 4,2 - 4,4 secs 0 - 62 mph. Next year, the S8 motor will be running a single turbo, in a rebuilt motor. Target power is 530 bhp. So power-to-weight ration will be 515 bhp per ton, assuming roughly a 30 kilo weight gain (turbocharger, pipework, charge cooler). So an estimate of 0 - 62 mph times will be sub-3 seconds on street tyres.

My aim is to build a sub-10 second car (quarter mile).

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