The LS1 swap has begun
#271
Hey doc - there is no way I would run a widened wheel where the existing barrel is welded to another. Fine for a street car perhaps, but would never be on any race use car I own.
If the center is machined down and mated to new barrels that can be different, but widening aluminum wheel is just a bad idea for a race car. I would buy the proper width wheels, or have them made to your spec.
If the center is machined down and mated to new barrels that can be different, but widening aluminum wheel is just a bad idea for a race car. I would buy the proper width wheels, or have them made to your spec.
#272
Rennlist Junkie Forever
#273
Rennlist Junkie Forever
Hey doc - there is no way I would run a widened wheel where the existing barrel is welded to another. Fine for a street car perhaps, but would never be on any race use car I own.
If the center is machined down and mated to new barrels that can be different, but widening aluminum wheel is just a bad idea for a race car. I would buy the proper width wheels, or have them made to your spec.
If the center is machined down and mated to new barrels that can be different, but widening aluminum wheel is just a bad idea for a race car. I would buy the proper width wheels, or have them made to your spec.
That's what they do.
They cut off about 2" of the inside of the wheel, they true the wheel around it's outside surface, then slip fit another barrel over the existing wheel so there's over lap, then it's welded together on the inside and outside (by a machine).
The wheels are trued at the barrel and at the hub mating face as well.
The machine they use to do the job is over $500k
And they do a ton of wheel widening on race cars (especially 911 race cars). They work great and are bullet proof reliable. I've hit a lot of **** on race tracks, real fast, and I've never had one bend or not hold air.
It works great for cheaters like me :-)
TonyG
..
..
..
#276
Rennlist Junkie Forever
And the modified wheel is at least as strong as the stock wheel, if not stronger.
There are a lot of big name race shops across the USA that use this company to make/modify wheels for their race cars. This is how I found about them.
There are ton of POC/PCA 911 race cars that run custom wheels done by this company. These are serious hard core racers. And there's never been a failure.
Anyway... I guess you can say that I bet my life on it...
2 1/2 years of racing on these wheels, curb hoping, pot hole hits, off road excursions at triple digit speeds... And they are still perfectly true.
TonyG
#277
Rennlist Junkie Forever
Can't go racing with only one set of wheels.
That's a LOT of money that could be applied to actually making car go fast, stop well, and handle.
BTW, I'm having the BBS forged wheels off of my '10 Evo X widened 2" next week :-)
TonyG
#279
Burning Brakes
Join Date: Nov 2007
Location: Nuke City, NM
Posts: 872
Likes: 0
Received 0 Likes
on
0 Posts
Altering the roll center is fine, but you should also then drop the tie rods down from the steering knuckles by the same amount so the tie rod angle and the A arm angle are parallel.
As far as the oil lines go... I wouldn't drive that car on a race track with the oil lines right there. No way. That line gets a hole in it, oil will get on the back tires. And real bad things can happen after that. (Unfortunately, I'm speaking from direct experience...)
I don't have my car here where I can measure things, but are you using the RH oil pan? If so, what's the distance between the cross member and the pan? What I'm getting at is the height of the motor mounts....
TonyG
As far as the oil lines go... I wouldn't drive that car on a race track with the oil lines right there. No way. That line gets a hole in it, oil will get on the back tires. And real bad things can happen after that. (Unfortunately, I'm speaking from direct experience...)
I don't have my car here where I can measure things, but are you using the RH oil pan? If so, what's the distance between the cross member and the pan? What I'm getting at is the height of the motor mounts....
TonyG
I have the RH pan (everything RH) and i actually had to cut some bracing off the mount for the R&P so that the oil pan would clear--it's low in the cradle! It actually could not get any lower.
At any rate... who knows? Yours fits! I wish i could get mine to fit without spacers! Maybe the hood is all it takes.
#280
Spacers >>>> Sorry... but Porsche uses them on a ton of their cars (including their race cars). That's good enough for me.
And the modified wheel is at least as strong as the stock wheel, if not stronger.
There are a lot of big name race shops across the USA that use this company to make/modify wheels for their race cars. This is how I found about them.
There are ton of POC/PCA 911 race cars that run custom wheels done by this company. These are serious hard core racers. And there's never been a failure.
Anyway... I guess you can say that I bet my life on it...
2 1/2 years of racing on these wheels, curb hoping, pot hole hits, off road excursions at triple digit speeds... And they are still perfectly true.
TonyG
And the modified wheel is at least as strong as the stock wheel, if not stronger.
There are a lot of big name race shops across the USA that use this company to make/modify wheels for their race cars. This is how I found about them.
There are ton of POC/PCA 911 race cars that run custom wheels done by this company. These are serious hard core racers. And there's never been a failure.
Anyway... I guess you can say that I bet my life on it...
2 1/2 years of racing on these wheels, curb hoping, pot hole hits, off road excursions at triple digit speeds... And they are still perfectly true.
TonyG
The fact that you are welding 2 different alloy compositions together makes it less than ideal. The result will vary with each and every "core" wheels alloy composition (forged wheel vs cast wheel, semi-solid forged, etc,etc) will have a different result. Different alloy compositions react differently to heat and welding, some alloys get brittle(similar to a work hardening effect), some weaken at welding sight, some won't weld at all.
I won't even get started on spacers. You think the aftermarket/generic spacers on your car are to the same spec/tolerance/quality as that of a factory Porsche race car? No doubt they too buy used unknown manufacturer spacers for their top dollar efforts as so many do on this forum - get real man - the spacer mentality in much of the Porsche community is downright scary.
MY race cars will never have widened wheels in this manner, repaired wheels, plugged tires, or wheel spacers just to name a few. There is the "right way" to do things and "other ways"..... I do **** the "right way" albeit more expensive in most cases.
Now let's agree to disagree on the matter and give Doc his thread back
#282
Rennlist Member
i dont understand the need for the crossmember spacers- we put Alans LS1 in with no spacers and it fit under the hood....and ive heard that an ls2 intake fits on and has more hood clearance. Maybe because we have a custom pan and custom engine mounts?
#283
Rennlist Member
Thread Starter
Generally have a space issue, throttle body hits, motor sits about 1/2" too high.
You were able to get around that with your motor mounts/oil pan.
You were able to get around that with your motor mounts/oil pan.
#285
Rennlist Member
Thread Starter
If it wasn't mostly a track car I'd consider it, but I think the gearing of the S2 trans is still beneficial on the track.
I just don't see where having the longer gearing of the 951 trans is an advantage for me, I won't be able to hit more than the 158mph that I'm limited to with the S2 trans on the track...
I just don't see where having the longer gearing of the 951 trans is an advantage for me, I won't be able to hit more than the 158mph that I'm limited to with the S2 trans on the track...