BadAss SRT-Z - 2.4L / A568 - Update!!!

[Reeves]

JT, you can set the preload on the input bearings without taking the trans apart, but you do have to take it out. It's real easy to set the preload.

But, I have had the kind of shake you are experiencing in a bone stock 555 in a slightly hopped up Shelby Z and it was the diff bearings getting loose.

Also, I have had the kind of shake you talk about in my OMNI when the CV's are getting loose.

[SebringLX]

Huge THANK YOU to SebringLX for the rental slicks! Sorry I didnt get a new PB on them, might be able to get out again if I get time to go thru the trans...

New best 330' and 1/8, so it had to be headed in that direction. Wish I could have come out and watched, but I did not feel like a 2 hour drive with what all that Chili from the night before was trying to do to me. Any video?

I've only ever had shake on those tires on decel after a run, which was due to a lug nut I didn't tighten properly. Tightened it, and no more shake. Unfortunately it doesn't sound like that was your issue. Hopefully you can get things sorted out and get some more runs in before the track closes for the season, which I'm guessing is soon.

[turboshad]

How did the 26s fit JT? What width? Have you lowered your car at all? My 24.5s are close to being done and I was thinking of giving the 26s a shot next year but I don't know how much they grow or how close they can be to the fender since they will be sticking out some.

[Pat]

Are you sure the shake isn't the clutch slipping? I've had clutch slip with copper/ceramic 4 puck clutches that really gave the car a high frequency shake/vibration. Pedal it, let the clutch grab and go and the shake was gone. You may be spinning the clutch.

[BadAssPerformance]

JT, you can set the preload on the input bearings without taking the trans apart, but you do have to take it out. It's real easy to set the preload.

But, I have had the kind of shake you are experiencing in a bone stock 555 in a slightly hopped up Shelby Z and it was the diff bearings getting loose.

Also, I have had the kind of shake you talk about in my OMNI when the CV's are getting loose.

Interesting... I was kinda thinking Diff mayeb too... I'll try to see if I can figure out if there is any play.

How did the 26s fit JT? What width? Have you lowered your car at all? My 24.5s are close to being done and I was thinking of giving the 26s a shot next year but I don't know how much they grow or how close they can be to the fender since they will be sticking out some.

I took pics and will post those. the 24.5's rubbe the gfx so I had to massage quite a bit to get clearance for the 26's

New best 330' and 1/8, so it had to be headed in that direction. Wish I could have come out and watched, but I did not feel like a 2 hour drive with what all that Chili from the night before was trying to do to me. Any video?

I've only ever had shake on those tires on decel after a run, which was due to a lug nut I didn't tighten properly. Tightened it, and no more shake. Unfortunately it doesn't sound like that was your issue. Hopefully you can get things sorted out and get some more runs in before the track closes for the season, which I'm guessing is soon.

Yeah chili power is not always a good thing waiting int he staging lanes too, LOL!

Grove is open till snow flies, so we'll see!

Are you sure the shake isn't the clutch slipping? I've had clutch slip with copper/ceramic 4 puck clutches that really gave the car a high frequency shake/vibration. Pedal it, let the clutch grab and go and the shake was gone. You may be spinning the clutch.

Interesting... You mean pedal the throttle, not the clutch, right?

On the one run, it did seem like it spun the clutch in 2 and I pedalled the clutch and it stuck.. no shake that time in 2 tho...

[BadAssPerformance]

A fun day at Grove today! Possibly the last TnT at Grove, forecasted to be 60°F and sunny, but cloudy and WINDY ... Thanks to 22shelby, tommy and Nicole coming out to crew!

OK, changes since the last time out...

-found clutch cable clip popped off - fixed
-backed off crank trigger to max 0.090"

Run #1 - Right off the trailer, cold tires, light burnout, No 2-step, spin, shake and fight for traction in 1, granny shifted, shake in 2, 3 and 4. Each gear shook a little, then cleaned up OK... best part, no cut out!

R/T: 0.982
60': 1.852
330': 4.864
1/8ET: 7.183
1/8mph: 109.06
1000'ET: 9.122
1/4ET: 10.790
1/4mph: 135.64

Run #2 - Took tire pressure down a tad, light burnout, No 2-step, spin, then hook/bog in 1, granny shifted, shake in 2, 3 and 4. Each gear shook a little, then cleaned up OK... best part, no cut out again, and a new PB!

R/T: .058
60': 1.734
330': 4.702
1/8ET: 7.010 <== New best!
1/8mph: 109.43
1000'ET: 8.942 <== New best!
1/4ET: 10.580 <== New best!
1/4mph: 137.95

Run #3 - Lowered tire pressure to match previous run, increased front struts 1/2 turn, light burnout, Tried 4900 rpm 2-step, spin hard, granny shifted, shake in 2 and 3, cut out so coasted

R/T: .621
60': 1.933
330': 4.911
1/8ET: 7.217
1/8mph: 109.55
1000'ET: 9.252
1/4ET: 11.254
1/4mph: 106.18

Run #4 - Cleaned oil off cam sensor, backed it off a turn, Lowered tire pressure to match previous run, light burnout, launch, and POP goes the ???

No forward or reverse, no oil coming out, no axle banging around... no noise when pushing it back to the trailer.

The good news... It's no the oil pump! LOL!

So, maybe it wasn't tire shake, but something else on its way out?

Soooo, Take your bets!

-DSS Level 5 Axle?
-OBX diff?
-Input Shaft?
-ACT SRT-4 Clutch?

Again, a Huge THANK YOU to SebringLX for the rental slicks! I got a new PB on them for ya! and will be buying some 26's of my own.. now to decide which brand? I REALLY like the M&H 24.5's, but these MT's are nice too!

[Directconnection]

10.5 at 138mph

[BadAssPerformance]

Thanks! ... with some broken parts too, LOL!

[Rampage16V]

1. Nice run
2. All of the above ^^
|

[22shelby]

yeah deff great run!! i was like wth just happened, when it launched it looked and sounded like it bogged big time, next thing you know a .58 comes up... i asked tommy like 4 times if i was reading it right, considering i am have eye problem right now too... i got a vid ill post it up

[Shadow]

A fun day at Grove today! Possibly the last TnT at Grove, forecasted to be 60°F and sunny, but cloudy and WINDY ... Thanks to 22shelby, tommy and Nicole coming out to crew!

OK, changes since the last time out...

-found clutch cable clip popped off - fixed
-backed off crank trigger to max 0.090"

Run #1 - Right off the trailer, cold tires, light burnout, No 2-step, spin, shake and fight for traction in 1, granny shifted, shake in 2, 3 and 4. Each gear shook a little, then cleaned up OK... best part, no cut out!

R/T: 0.982
60': 1.852
330': 4.864
1/8ET: 7.183
1/8mph: 109.06
1000'ET: 9.122
1/4ET: 10.790
1/4mph: 135.64

Run #2 - Took tire pressure down a tad, light burnout, No 2-step, spin, then hook/bog in 1, granny shifted, shake in 2, 3 and 4. Each gear shook a little, then cleaned up OK... best part, no cut out again, and a new PB!

R/T: .058
60': 1.734
330': 4.702
1/8ET: 7.010 <== New best!
1/8mph: 109.43
1000'ET: 8.942 <== New best!
1/4ET: 10.580 <== New best!
1/4mph: 137.95

Run #3 - Lowered tire pressure to match previous run, increased front struts 1/2 turn, light burnout, Tried 4900 rpm 2-step, spin hard, granny shifted, shake in 2 and 3, cut out so coasted

R/T: .621
60': 1.933
330': 4.911
1/8ET: 7.217
1/8mph: 109.55
1000'ET: 9.252
1/4ET: 11.254
1/4mph: 106.18

Run #4 - Cleaned oil off cam sensor, backed it off a turn, Lowered tire pressure to match previous run, light burnout, launch, and POP goes the ???

No forward or reverse, no oil coming out, no axle banging around... no noise when pushing it back to the trailer.

The good news... It's no the oil pump! LOL!

So, maybe it wasn't tire shake, but something else on its way out?

Soooo, Take your bets!

-DSS Level 5 Axle?
-OBX diff?
-Input Shaft?
-ACT SRT-4 Clutch?

Again, a Huge THANK YOU to SebringLX for the rental slicks! I got a new PB on them for ya! and will be buying some 26's of my own.. now to decide which brand? I REALLY like the M&H 24.5's, but these MT's are nice too!

Nice to see you get that 10.5 BEFORE she popped!!!!

Good news is your prob going to solve your tire shake now! (I'm thinking something in the diff area to the tire)

[cordes]

Congrats on the new PB JT.

I don't have a good educated guess for the trans right now, but It very well could be an axle. I would be impressed if you broke an input shaft.

[22shelby]

VID!!!

[135sohc]

Twisted the center out of the clutch disc.

[SebringLX]

Awesome! I just got back from an extended ANG drill weekend. So how much better than your previous PB was that, .2?

[rx2mazda]

Congrats JT! You putting down some sick numbers for such a heavy car. Tire shake breaks sh*t(as you can see)so maybe it's better that you get to figure it out now before next season.

[BadAssPerformance]

Nice to see you get that 10.5 BEFORE she popped!!!!

Thansk, yeah, too bad it popped, it finally hooked on that run! LOL!

Awesome! I just got back from an extended ANG drill weekend. So how much better than your previous PB was that, .2?

Best on the 24.5's was a 10.61 (spinning into 3rd) so not too much better YET but should be able to do much better now that it can hook! Thanks again for the slick rental!

Congrats JT! You putting down some sick numbers for such a heavy car. Tire shake breaks sh*t(as you can see)so maybe it's better that you get to figure it out now before next season.

Thanks! And yeah, got some time to figure it out... still nto sure if the shake was cause by the tires or cause the tire shake...

Is the axle supposed to do this? LOL!



---------- Post added at 12:15 PM ---------- Previous post was at 12:11 PM ----------

Congrats on the new PB JT.

I don't have a good educated guess for the trans right now, but It very well could be an axle. I would be impressed if you broke an input shaft.

Thanks! ... after further diagnosis, I'm ruling input shaft out (for now)

Twisted the center out of the clutch disc.

I guess you could do that with a solid hub but think it would make noise?

[BadAssPerformance]

VID!!!

Awesome footage! Thanks again! Wow... guess the 2-step was a TAD too much for the track to hold

[135sohc]

I thought you were still using a sprung disc ? http://www.badassperformance.com/mri...s/act-disk.jpg

[BadAssPerformance]

Yeah, I need to update that... That disc was worn out so I put a solid hub in this season same plate and flywheel, just a disk swap