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

[jonnymopar]

Because they are junk. The SRT guys want our trans because they live longer...

+1 for this. I wouldn't go near the T850. I still wish there was more documented abuse put on the Getrag 288S in the manual PT Cruiser turbos. Seems like a real nice piece.

[BadAssPerformance]

Been busy and away, finally got a break... trying to repost pics of Mopar Nats carnage

Axle:


Trans:

[BadAssPerformance]

New trans before and after hours of cleaning and rebuild

[lengel]

Broke a axle and the trans all at the same time? That sucks! That new trans looks awesome! How did you get it lookin so good?

[BadAssPerformance]

Broke a axle and the trans all at the same time? That sucks! That new trans looks awesome! How did you get it lookin so good?

Actually they were a separate runs. re-quoted the run breakdown from the Nats below. Pretty sure the axle only went cuz it went thru all the 26" tire hits and built up fatigue cycles

Thanks, the trans case was corroded to F and filthy too and I couldn't really see the surface so I spent a lot of time with wire wheel and wire brushes to clean it thoroughly and inspect for cracks.

Well, bittersweet runs at the Nats...

Friday

First time run, thought I would try the 2-step... its on a small tire, right? Nope. SNAP the inner DS tripod joint bad.. pics to come.

Swapped in the spare set of axles....

Second time run, left soft, low boost, rode it through 3rd gear, then switched to high boost, watched it climb but then it turned into a handful and had to watch where I was headed as I was in the right lane trying to keep it from drifting left out of the groove. Low boost was at ~23psi and high boost was over 3bar (30.4psi). Was too busy watching where the car was going to look at gauge and forgot to put GoPro on. Granny shifting and all, it ran clean, no breakup! Previously posted time below

R/t .159
60' 1.886
330' 5.073
1/8 7.464
mph 105.1
1000' 9.486
1/4 11.139
mph 137.88

Lowered both low and high boost settings...



Saturday started out went better as Reeves noted! We couldn't hear the call and was late to the lanes for STICK class but they let me run after the FAST class... This time I left and switched to high boost as I shifted 2nd and the boost built slow, but by third gear it looked to be about the right spacing to be maybe 5psi over 30psi on the 30lb gauge, the most I've run with this combo. Granny shifting again, but it pulled hard on high boost and again pulled left... new best MPH, picked up 34mph in th second 1/8th...

R/t .137
60' 1.841
330' 4.951
1/8 7.231
mph 108.79
1000' 9.151
1/4 10.741
mph 142.72

After this run, looked at the data log and log stopped before 4th gear, but in the top of 3rd it creeped up to 12:1 at 92% DC

Turned the boost down again... and lined up for the next time run and, KaBOOM! The OBX diff tried to come out I wanted to put a Quaife in it, but not this soon!

[BadAssPerformance]

Catching up... run recap from Monster Mopar Weekend in Norwalk in September.

It was a GREAT event, and a lot of fun racing with Reeves, OhioRob, 92TurboSpiritES and more and hanging with all the SDAC crew from the several Chapters in attendance!

First time running at Norwalk and know from taking MB's Talon there for the DSM shootout that it is a nice track and hooks well, so after the Nats' carnage I REALLY didn't want to break anything so I figured it would be a good time to practice really hard to leave soft and drag the clutch a ton... which resulted in a lot of red lights cuz if it rolled, I went, LOL! I just got it back together the weekend before and it drove around the block OK, but hadn't the opportunity to take a test hit yet so I planned to start out light. Took 2-stage boost off and back to 29psi setup. Also, back to a 3.50:1 FDR so I needed to re-learn the shift points... anyways, here goes:

Friday Time Run 1: Slipped clutch and bogged off line then short shifted 2 and 3 ~ 29psi

R/T .029
60' 1.913
330' 5.162
1/8 7.597
mph 105.46
1000' 9.597
1/4 11.261
mph 136.86

Friday Time Run 2: Slipped clutch and bogged off line ~ 29psi

R/T -.063
60' 1.896
330' 4.964
1/8 7.272
mph 109.65
1000' 9.206
1/4 10.833
mph 139.18

Saturday Time Run: Slipped clutch and bogged BAD off line ~ 29psi

R/T .083
60' 2.135
330' 5.175
1/8 7.362
mph 110.19
1000' 9.404
1/4 11.029
mph 139.33

Hmmm... OK, what to dial? I asked MB and she was thinking 10.90 because it was off from the Friday run, but the 11.02 was on a crap 60' and it went 10.83 Friday... I really didnt want to lift so... how about 10.79?

Saturday Round 1: Slipped clutch and bogged off line ~ 29psi

Dial: 10.79
R/T -.138 <= I saw that I red lit so I ran it out the back door. I woulda lost anyways, the other car went 10.528 on a 10.52 dial with a .060 R/T!
60' 1.878
330' 4.874
1/8 7.147
mph 110.73
1000' 9.080
1/4 10.705 <= Breakout, but who cares! LOL!
mph 139.76

Sunday Time Run: Slipped clutch and bogged bad off line ~ 29psi

R/T -.035
60' 2.079
330' 5.162
1/8 7.443
mph 110.35
1000' 9.387
1/4 11.005
mph 139.86

Again, what to dial? Using Saturday's strategy and not wanting to lift, 10.69 it was!

Sunday Round 1:

Dial: 10.69
R/T -.081 <= Another redlight but he redlit first so I got a free pass
60' 2.057
330' 5.148
1/8 7.428
mph 110.81
1000' 9.346
1/4 10.953
mph 141.02 <= where did the mph come from!?

Sunday Round 2:

Dial: 10.69
R/T .154
60' 1.790
330' 4.770
1/8 7.024
mph 108.42
1000' 9.022 <=About 1000' it cutout for a second
1/4 10.688 <= breakout by .002 from the dial - passed the other car at the stripe and crossed first by .0115. Would have been nice to win but I'm more mad that it cut out cuz it woulda been a 10.fifty!
mph 136.70

Now the past couple years I have probably used the words "cutout" and "breakup" more than I can remember and may have interchanged them. Earlier this year at SDAC-24 it was breaking up and that problem has been solved since swapping plugs and closing the gap. The cutout issue on this last run is similar to what I had a lot of all last year which I think is more related to cam sync since it is usually just one stutter then it runs again. I thought I had fixed this after SDAC-23 (Muncie) when I relocated the cam sensor wires and it was gone all year until now...

Other than diagnosing the cutout it was leaking a little MTL from the bell housing and the clutch did feel soft on the 3-4 shift the last run so oil on the clutch or a severely abused clutch trying to make parts live, or the new input shaft seal got nicked on install. Either way the trans has to come out and the clutch needs rebuild anyways.

Great weekend overall for the car not only running well but able to drive back on the trailer. Many folks stopped by to see what it was and most commented on the mph.

[Ondonti]

Glad to see a decent pass while slipping the clutch on launch. I never saw any pics until a few weeks ago when I realized FB had some :P
Not sure how to cut a good light without a staging brake and that wouldn't help you get your slip just right. A lot of people driving to save their drivetrain are probably not competing in brackets :P
Would have been cool if you had a before thickness measurement on your clutch disc(s) because I would want to slip it even more if you could get away with it but heat will probably get out of control.

[jonnymopar]

I just noticed that nice scatter shield in the install pics.

[BadAssPerformance]

Glad to see a decent pass while slipping the clutch on launch. I never saw any pics until a few weeks ago when I realized FB had some :P
Not sure how to cut a good light without a staging brake and that wouldn't help you get your slip just right. A lot of people driving to save their drivetrain are probably not competing in brackets :P
Would have been cool if you had a before thickness measurement on your clutch disc(s) because I would want to slip it even more if you could get away with it but heat will probably get out of control.

I really think the 24.5's wont hurt the parts nearly as much as the 26's so really was just trying something different... The twin disk is really grabby so I had to slip the F out of it to not bog or spin tires. I'm guessing they melted some I plan to get a re-build kit and can measure the old to new disk thicknesses

I just noticed that nice scatter shield in the install pics.

Yep, I always wanted to fab my own, but Reeves made a group buy on them and its a real nice piece. My nuts feel nice and safe thanks to Reeves

[BadAssPerformance]

In between working too much, planning SDAC-25, etc. etc... every spare minute I dream about driving the Z again and want to try to make some improvements.

So far the plans to start off this year...
-Rebuild ACT Twin Disk clutch
-Install Lengel's bearing plate

And, drooling over Lengel's handiwork endplate here and wanting to put the test to it makes me want to try the 26" tires again, but I think I need a better axle solution first. Of course Lengel is already crafting his own axles and I realize I don't have a turbo block, so using the SRT4 axles is not as easy as it would be...

Anyone have an SRT4 Quaife and set of SRT4 axles with mounting bracket for sale for a decent price? I think that's where I need to start for fitment...

Anyone know of any brackets to attach the SRT4 axles to the back of the NA block? So far this is the only one I found:

http://forums.neons.org/viewtopic.php?f=134&t=408855

- - - Updated - - -

Attachment 54162

[BadAssPerformance]

Finally took a few minutes to work on the car... The clutch was soft on the 3-4 upshift and possibly some slip in 4th so sending the clutch out for rebuild.

Attachment 54800

[Aries_Turbo]

that thing has seen some action lol

[black86glhs]

that thing has seen some action lol

How can you tell? I won't show the pic for me.

[Reaper1]

Finally took a few minutes to work on the car... The clutch was soft on the 3-4 upshift and possibly some slip in 4th so sending the clutch out for rebuild.

Attachment 54800

Pic no workie

[Wastelands Warrior]

That car is badass, plain n' simple!!!

[turbovanman²]

Yes it is. What are you doing with the OBX?

[BadAssPerformance]

Attachment 54804

[Pat]

Pics no workie.

[Ondonti]

Attachment 54804

Wow that is some carnage!

[turboshad]

^^^I'm with breakfast man. Can't see the pic.