Who's the fastest with 3 bolts rearend

[set3422]

Well the reason I ask this because I'm trapping about 12x mph on my frank 4'ed 90 gsx. Always easy on the launch, but afraid won't hold on 2nd and 3rd gear. Anyone snapped theirs on rolling gears. Thanks.

 

[ASZRAEL1266]

I snaped mine, but i also have a friend who is on the site. He has a 90 TSI he has mad acouple high 12 second passes on his 3 bolt and it is still holding together. He wants to see how far he can take it before it breaks.

 

[jersygsx]

I have a 90 gsx and was wondering the same. There is a 92 gsx at a local yard. What should I take off the car besides the rear and axles?

 

[set3422]

Originally posted by ASZRAEL1266
I snaped mine, but i also have a friend who is on the site. He has a 90 TSI he has mad acouple high 12 second passes on his 3 bolt and it is still holding together. He wants to see how far he can take it before it breaks.

Did you snap yours on the launch? Or on rolling gears? SBR Mike Huml i think still running 3 bolts on their dark blue old talon.

 

[set3422]

Originally posted by jersygsx
I have a 90 gsx and was wondering the same. There is a 92 gsx at a local yard. What should I take off the car besides the rear and axles?

the cuppings that go on the wheel bearing side.

 

[puhrot]

I belive John Shepherd runs a 3 bolt rear end?

 

[NOSLO2PT0]

Originally posted by puhrot
I belive John Shepherd runs a 3 bolt rear end?

You can't be that stupid, can you?

 

[set3422]

Originally posted by puhrot
I belive John Shepherd runs a 3 bolt rear end?

That's suicidal.

 

[GRNDSM]

You can brake a 3 bolt with a high 13 sec car. All it take is a launch with wheel hop.

Using a strong clutch will also do it on just about any car. You basically can not launch ACT2600 with 3 bolt rear end and even ACT2100 clutch means that you are safe. You might be able to get away with it a couple of times but it will catch up to you . The good thing about it, is that such failure usually does not strand you at the track. My friend once drove from Norwalk OH, back to Boston (720miles) on a brocken rear axle. But that is not always the case, one time I have seen rear axles coming loose, in which case, you can not drive the car. However, this is pretty rare.

Bottom line, if you are racing your car, upgrade that rear end. You will brake it sooner or later. Or keep a spare axle in the trunk . You will keep braking drivers side one.

Leon
RR

 

[THEDUKE]

Im still running my original 3 bolt.......11.667@123
easy lanch though.....

 

[ASZRAEL1266]

when i got my 3 bolt i snaped two rear axels till i got my 4 bolt

 

[set3422]

Originally posted by THEDUKE
Im still running my original 3 bolt.......11.667@123
easy lanch though.....

seems like we both need to do the swap below:

http://www.vfaq.com/mods/4bolt.html


Good Luck

 

[FastRthenU]

12.1 and have never broken any part of the rear end. But I dont think im gonna push it any farther. I really think its all how you drive. If you dont want to break any part of the drive line then you need to learn how to launch the car. I know a guy that is runing 11.1 on a stock center diff. Which i think is un-real.

You just cant bang gears to hard, and you need to slip the clutch right so you dont shock the drive-line to hard

 

[NOSLO2PT0]

If anybody needs a 4 bolt, I've got a spare one for sale. Everything included. $400 shipped

 

[TurboDSM90]

THEDUKE & FastRthenU, what were your 60ft times? also, what oil(brand, weight,etc.,)did you have in the rear diff, tranfer case, and tranny? What tires were you guys running? what clutch (brand/pressure plate, disc type) were you guys using? little things like this do play a role in the drivetrain, and I would like to compare so I can get an idea of how much stress the drivetrain is under, and what it can take.

My set up when I hit the 12

GoodYear Eagle GTIIs/stock rims 28psi rear/30psi front
GM Synchromesh in the tranny
Redline 75/80 or 90 wt in the transfer case
Mobil one 75/90 in the rear diff
ACT 2600 w/street disc(the usual) stock flywheel
No lsds except for the stock 3 bolt one

all on a 1.8 60 ftr, slipping the clutch at 5-5.5k for the launch, from there on shifting hard til 4th.NO foot floored while shifting stuff, just quick/hard shifts,then dumping the clutch between em.

Originally posted by ASZRAEL1266
I snaped mine, but i also have a friend who is on the site. He has a 90 TSI he has mad acouple high 12 second passes on his 3 bolt and it is still holding together. He wants to see how far he can take it before it breaks.

I want to hit just one 11 second pass on my 3 bolt....but only the DSM gods will know.....

 

[NOSLO2PT0]

Just an FYI, I broke my 3 bolt while running 26psi and only in the lo 12's. And it was a mediocre 60', maybe 1.65

 

[GRNDSM]

You guys can make all examples of fast cars on 3 bolt rear ends, all you want, those people are on borrowed time! For every car that runs 11’s on a 3 bolt rear end, there are 10-20 cars that broke it in 12.50-14.00 range.

Can you take a light car and baby the launch to make this work for a while? Sure, but is it worth loosing any of your races for $300-$400 (a price of used 4 bolt)? I think not! Just going to the track, paying to get in, getting the race gas, all to have a rear axle snap on your first pass and hope that you can make it home on it. Not to mention that you might have an important race at the time. What are you trying to prove? That you got lucky a couple of times?

I think that running certain times on lesser mods is worth something to some people, but IMHO, using a 3 bolt rear end is NOT one of those things...

Leon
RR

 

[set3422]

Originally posted by GRNDSM
You guys can make all examples of fast cars on 3 bolt rear ends, all you want, those people are on borrowed time! For every car that runs 11’s on a 3 bolt rear end, there are 10-20 cars that broke it in 12.50-14.00 range.

Can you take a light car and baby the launch to make this work for a while? Sure, but is it worth loosing any of your races for $300-$400 (a price of used 4 bolt)? I think not! Just going to the track, paying to get in, getting the race gas, all to have a rear axle snap on your first pass and hope that you can make it home on it. Not to mention that you might have an important race at the time. What are you trying to prove? That you got lucky a couple of times?

I think that running certain times on lesser mods is worth something to some people, but IMHO, using a 3 bolt rear end is NOT one of those things...

Leon
RR

Makes sense. Especially when you KNOW the 3 bolt will fail eventually, so no one to blame but yourself if it fails on the track.

 

[THEDUKE]

Yes i know im on borrowed time.... thats why i have a 4 bolt , just not installed. Havent got around to it. i have a lot of time now though because race season is over in bristol. my et suffered because of my easy launch so i would have be better off with the 4 bolt by far

 

[TurboDSM90]

Originally posted by GRNDSM
You guys can make all examples of fast cars on 3 bolt rear ends, all you want, those people are on borrowed time! For every car that runs 11’s on a 3 bolt rear end, there are 10-20 cars that broke it in 12.50-14.00 range.

Can you take a light car and baby the launch to make this work for a while? Sure, but is it worth loosing any of your races for $300-$400 (a price of used 4 bolt)? I think not! Just going to the track, paying to get in, getting the race gas, all to have a rear axle snap on your first pass and hope that you can make it home on it. Not to mention that you might have an important race at the time. What are you trying to prove? That you got lucky a couple of times?

I think that running certain times on lesser mods is worth something to some people, but IMHO, using a 3 bolt rear end is NOT one of those things...

Leon
RR

Poppa always said, "Do what you can, with what you got". I got 2 complete 90 drivetrains, so I am prepared....I also have a flatbed trailer that i will be towing the car around on....I really aint worried about busting the rear end....if it happens it happens. I know it cant take much power to break, I like a few other dsmrs have been surprised by how much it SEEMS these rear ends can take.....

It is going to break, the question is when...the world may never know

it is, obviously in how you drive

 

[Hercules]

Over 100 runs in the 12's on a 3bolt.

Currently, 12.2@112.
1.7 60' times
stock rims, 225/50/16 Kuhmo supra 712's
2 step launch at 5K, no lift shifting...most of the time.
ACT 2100

GM oil in trans
redline shockproof in transfer
redline 75/90 in rear.

 

[GRNDSM]

>if it happens it happens.

And what if it happens in the quarter or semi-finals of race where you stand a good chance of winning? If all you ever do are some test and tune passes, then sure, fix it as it brakes. But if you are into serious competition, you can’t afford this type of attitude.

But you are also correct on the driving style, it has a lot to do with it. I just still do not get why you would anyone take that chance for such short money…

Leon
RR

 

[TurboDSM90]

I apreciate you looking out for us unexperienced "drag racers", its kinda hard for some of us to fork up the money for what we have purchased, and what we WILL purchase, its just not gonna happen until there is a forcefull reason. or untill completely necessary. Information and support is what the beginners are looking for(me)....

its not easy finding a 4 bolt locally, even if it was, it would take some time to save up the $.

I am not serious about racing, yet. I dont expect to win, I dont expect the car to make me rich. I expect the car to break, I will be there to fix it .

I just still do not get why you would anyone take that chance for such short money

This is my hobby, i do this for fun, and, knowledge not glory.

Working on my dsm is fun, and rewarding.

 

[FastRthenU]

Around low 1.7's for 60ft
Act2600 pp street disk
Bald crappy tires (spin most of first gear)
Syncro shift gear oil in tranny
Reg gear oil in trans
Never check or changed gear oil in the diff

 

[PSI2HI]

One of our shop cars (Kevin's 90 GSX) went [email protected] on a 3 bolt rear end and a stock longblock.

Nick