AWD ICCARS Cobra

[d488y2]

Mad Skills, loving this build !

[renovationinnov]

wil
how are you going to have the front end attached ?
then where does it drive from ?
or is this still in the planning stage

[ICCARS]

Originally Posted by renovationinnov

wil
how are you going to have the front end attached ?
then where does it drive from ?
or is this still in the planning stage

I have a design for this system to drive the front wheels but it is not proven and so I need to build and install this drive then test it and I will look to put a patent on just this part of the car as it has taken a few years of my time to get this part of the car thought out - sorry I can not give you any more info but with all due respect it is something I am keeping close to my chest for now.

I am confident in the drive system however, but the proof is in the tasting as they say.

Cheers

[deano59]

Originally Posted by ICCARS

I have a design for this system to drive the front wheels but it is not proven and so I need to build and install this drive then test it and I will look to put a patent on just this part of the car as it has taken a few years of my time to get this part of the car thought out - sorry I can not give you any more info but with all due respect it is something I am keeping close to my chest for now.

I am confident in the drive system however, but the proof is in the tasting as they say.

Cheers

im sure you will sort the drive system out I can think of 2 ways straight off the top of my head that would get drive to the front wheels easy enough wether it would be strong enough would be the million dollar question I am watching this build with keen interest I love it when people think outside the box and do things that are unconventional ,,cheers dean

[ICCARS]

You are absolutely correct Deano in what you have mentioned, however I can advise that by my calcs the drive system I have designed is strong enough, in fact the service factor is something to the order of 5 times greater than the minimum strength/load requirement based on the Audi V8 output. However the issue of keeping the transfer drive stabilised under excessive twist of the chassis is where I have had to concentrate my efforts. As is the case in most chassis, the main point of flexion is in the front part of the chassis between the left hand and right hand chassis rails, therefore it is imperative that whatever system of transfer drive is being applied is suitable to withstand this movement sufficiently.. This will be the real test for the drive system!!

[ICCARS]

So with limited time today I managed to get a little bit more done on the AWD cobra project. All the rolled sections are finished, the mid bulk head is in and ready for connection to the front tie ins and side intrusion plates to be fitted, the rear bulk head is in place and the secondary carry frame for the body is also in place, so now I just need to make the boot pieces and weld them in and the rear end is finished - easy..

The front tie in sections that carry the body through the length of the bonnet opening have highlighted a small concern, as I cut out the strut mount plate from the donor car and affixed it to the the struts to position them exactly where they would be in their original position - this has then highlighted that the spread between them is too close. The solution is to remove the strut carry plates and mount the top control arms onto the tie in bars and make new mount plates for the struts that move them out further in order to clear the body... That's my thoughts on it anyway

The other thing that this top strut mount plate has highlighted is that I will need to rotate the steering rack on it's axis to have the steering input shaft for the rack turned up at approx. 45 degrees to clear the engine cam cover. All still coming together pretty good though and the chassis is almost nearing completion in the pre-assembly stage..

[SydneyChris]

Is the easiest way to get access to everything... is a 'mod' I had wanted to to for mine after realizing how much work it would be to do something as simple as a clutch.. ! Need to check if I jack the engine up and remove the mounts whether the block will drop through the rails.. it may work with a bit of wrestling. Would then need to mod the rear gearbox mount to make it a bolt on, rather than welded bracket and it would be 'possible' !!

Is great to watch how you have tackled these issues Wil.. good to learn from your experience and consider whats achievable with a bit more know how...

PS.. 5x for your driveline calcs is a reasonable safety factor to account for shock loading..

[ICCARS]

Good luck with that mod on the FFR chassis Chris, from memory the chassis rails are only 22" apart from centre to centre so this would only give you 457mm between the tubes to drop the entire engine out - unless I am missing the point and you just wish to drop the trans out only? That might be plausible but I am not sure about the bell housing you are using on your set up - I know on my std chassis there is no way that could drop a trans out through the chassis rails as my chassis is 50mm narrower than the FFR chassis.

The drive redundancy was calculated on the basis of the 70/30 split through the drive train, therefore the rear wheels take up a majority of the load and the front wheels pull the nose straight on hard acceleration.. I just need to keep ploughing through now and get it finished while the consulting work is slow and I am able to be home for extended periods of time lol..

[SydneyChris]

Originally Posted by ICCARS

Good luck with that mod on the FFR chassis Chris, from memory the chassis rails are only 22" apart from centre to centre so this would only give you 457mm between the tubes to drop the entire engine out - unless I am missing the point and you just wish to drop the trans out only? That might be plausible but I am not sure about the bell housing you are using on your set up - I know on my std chassis there is no way that could drop a trans out through the chassis rails as my chassis is 50mm narrower than the FFR chassis.

The drive redundancy was calculated on the basis of the 70/30 split through the drive train, therefore the rear wheels take up a majority of the load and the front wheels pull the nose straight on hard acceleration.. I just need to keep ploughing through now and get it finished while the consulting work is slow and I am able to be home for extended periods of time lol..

Thanks Will.. yes.. the intent was to change the clutch by dropping then then tilting the driveline enough to back the transmission off the bell housing.. then drop that before doing the swap..

[ICCARS]

Some progress photos from today following the kids footy and netball!!

Starting to look more & more like a car now..

[SydneyChris]

Hi Will.. what are you anticipating as the final weight on this one, and more importantly the power to weight.. was waiting for the carbon fiber tub to make an appearance, but it seems like its not going to happen..

Cheers

Chris

[ICCARS]

Originally Posted by SydneyChris

Hi Will.. what are you anticipating as the final weight on this one, and more importantly the power to weight.. was waiting for the carbon fiber tub to make an appearance, but it seems like its not going to happen..

Cheers

Chris

Hey Chris, I would suggest somewhere around the 1200+Kg mark with this engine and trans package; the beauty with this design will be that we can use the Audi quattro manual AWD transaxles and couple them to Windsors, Boss motors or LSA if we want to and then there would be some weight savings as the 5speed auto/sequential box is bloody heavy and the engine albeit alloy is a big bulky engine... There is not much different in the chassis to chassis weight between this set up and the std chassis set up.

As for Carbon fibre, well lets just say there will be none to be seen but to overcome the weight differential is all a matter of horsepower...

[renovationinnov]

Some progress photos from today following the kids footy and netball!!

Starting to look more & more like a car now..

wil [ wish I could get that much done in some little time too!

[SydneyChris]

Thanks Will.. Would have expected a few hundred kg more given the mass in that suspension and driveline.. watching with interest..

[ICCARS]

Originally Posted by SydneyChris

Thanks Will.. Would have expected a few hundred kg more given the mass in that suspension and driveline.. watching with interest..

Yeah Chris, a little bit more weight will make for a better ride on the road (softer feel) but the twin or single turbo set up will still make this girl get off here bum.. lol I have two AR .48 Garret turbo's for the engine, but I am thinking it would be easier with a single turbo set up.. Need to finish the drive system off first then worry about that after I think.

Cheers

[ICCARS]

Fortunately for me I have a gun fibre glasser for a son (only 15 years old), whom has made me some race seats and is making me a GT40 dash at the moment, and then will work with me to pump out a couple of cobra bodies.. It's good to keep the skills in the family.
Love the way these seats sit in both my Cobra and GT40#2.. Very comfortable already without the trim on them.

[SydneyChris]

Hi Will.. no ADR compliance requirement for seats in SA..?

Chris

[ICCARS]

Originally Posted by SydneyChris

Hi Will.. no ADR compliance requirement for seats in SA..?

Chris

Hey Chris,
if the seat is solidly mounted and in a fixed position then no ADR for any seat is required, I believe it is the same across all states but I could be wrong.

[Modena]

Originally Posted by ICCARS

Hey Chris,
if the seat is solidly mounted and in a fixed position then no ADR for any seat is required, I believe it is the same across all states but I could be wrong.

ADR #3 sure applies, in Vic anyway, plus the one (forget the number) for headrest height.

[ICCARS]

OK, that's handy to know as in S.A. a fixed seat is not subject to any ADR only the hinged seats. The seat height for the head rest is a consideration though but I am not entirely sure what that measurement is..