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

[Pat]

if you're spinning, you're not pulling as hard. 24.5's spun all the way thru 1st and I held it in 1st till the wheel speed caught up to the rpm so it didn't drop rpm and bog in 2nd, I think this is where some of the lost ET is

After abusing the tires in 1st I think it hooked ok in 2nd, maybe not at first, but once it was pulling. I'll have to dig up time slips to compare

If you're 60 foot was comparable from the 24.5's to the 26's, the car was accelerating about as hard in 1st gear whether you were spinning or not.

[BadAssPerformance]

Yes, with the same 60' time, they were both accelerating the same... up until 60'

[BadAssPerformance]

Looks like 1st spins past 60' ... MB also reported that it spins thru 2nd.

Need to try low boost launch... some slo-mo footage towards the end of this:

https://www.youtube.com/watch?v=u6MK58u1iNw

[bakes]

Looks like 1st spins past 60' ... MB also reported that it spins thru 2nd.

Need to try low boost launch... some slo-mo footage towards the end of this:

https://www.youtube.com/watch?v=u6MK58u1iNw

need to get out the white bingo dabber and paint a 1" pie mark on the slick and then watch the vid footage to try and dial in the magic 18% wheel slip

[Ondonti]

Looks like 1st spins past 60' ... MB also reported that it spins thru 2nd.

Need to try low boost launch... some slo-mo footage towards the end of this:

https://www.youtube.com/watch?v=u6MK58u1iNw

I see that last evo was very careful with his clutch, rolling out and then the car takes of where yours basically looks like a clutch dump. Almost every fwd I have seen that is quick seems to launch like that while powerful AWD's that make a lot of passes without breaking ease out.

[BadAssPerformance]

Didn't get a chance to install the ghetto 2-stage boost but will bring ti with to the track.

Good news is I found the boost leak(s) and cause of high idle. I plugged the turbo inlet and put compressed air into the pressure tap on the comp housing. Soapy water blew bubbles at the TB gasket and the pipe to TB connector hose, and a weld on the BOX flange (that must have always been there)

OK, no problem to fix those... took the IC to TB pipe off and then the TB off the intake... and then I found the real problem. The TB shaft was broken at the screw hole on the side closest to the throttle lever!? hole in the plate was probably the cause of the high idle, bingo.. WAIT a MINUTE, Where is the Screw!?!?!?? Crap! OK, so the setup has the TB inlet facing down towards the IC and then goes up into the intake, the screw head side is on TB inlet side... so maybe it fell into the IC? I put the magnet on flexible shaft in to the IC.. nothing. Then I shoved it into the intake plenum and fished around.. nothing. hmmm.. OK, snuck the camera into the IC and took a pic, no screw. Then took several pics of the inside of the plenum of the intake and nothing that looked like a screw. The runners / raised port velocity stacks are on the side of the plenum and I was thinking crap, how the hell did it fly up into one of those? I'm sure it could have, but then, I think it would have hurt an intake valve, piston, head, exhaust valve, turbine ... hmmm.. looking at the pics the floor of the plenum is pretty much flat except the Air temp sensor and one vacuum/pressure tap... hmmmm... pull the vacuum line off and bingo, there's the screw! yay!

OK, so now I gotta decide what to do... this TB was junk. BTW, it was a "POWER" brand off ebay, and it was pretty cheap, so guessing Chinese for sure. Iwas working on the car to fix the issues so I could take it to the track tomorrow. Hmm... well, it is a Ford Mustang TB, what are the chances someone has one on the shelf? Called up Winner's Circle in Joliet and they had both BBK and Edelbrock 75mm TBS in stock! I headed out and ended up picking up the BBK as it was $15 less and I think it looked a little nicer too. All flange surfaces were machined and the Edelbrock some were "as cast"... I'm sure both work OK. Also picked up a spare TB gasket and a weatherpack connector. The Power TB had an adjustable TPS mount and I modded it to use the mopar TOS. The BBK (and edelbrock) didn't have they type of mount, but they did come with a Ford TPS... so I figured the connector was all I needed.

Went home, prepped TB (filled AIS holes with cold weld, modded TPS, swapped AIS block off plate from old TB.) and put it all back together. After the TB was sealed up, found and fixed a couple more boost leaks.... and woke up the neighbors at about 11

we'll see how she does at the Grove tomorrow!

[Ondonti]

What do you mean by modded TPS? Ford TPS voltage range is different then ours. When I was using a stock ecu with Ford 65mm TB I ghetto modified our stock TPS to work using a small screw (cut head off) that I slotted on both sides so that the shaft would transfer its position to the Chrysler sensor. this required longer then normal screws to hold the sensor in place and I can't tighten it otherwise it binds up. :P

Now with MS I really should have swapped back to a real Ford TPS sensor by now.

[BadAssPerformance]

I modded the ford TPS by removing the ford connector and soldering on a weatherpack that plugs right into the harness.

Interesting to note, the Mopar TPS range was like 13% to 73% and the Ford one is like 18% to 94%, so yeas, the V ranges are different, but that really doesn't matter too much for the FAST ecu

[Ondonti]

Forgot you had full control :P
I seem to run a few Ford parts and try to make sure I have pigtails from the junkyard...even if I forget to install them.

[BadAssPerformance]

OK quick update... will add more later.

Made 4 passes Sunday, the new TB works great. That and the other boost leaks fixed combined with cool air up from 28psi to just over 30.

Didn't get a chance to set up or try two stage boost.

I do think I might have figured out the cut out! First pass missed 2nd but was clean (no cut out) was 11 something but 135.5mph so TB works. Second pass cut out at the lights, was 10 something at lower mph. Cam sensor is blocked from oil now and thought to look there again. The wire loom (black split wrap0 was melted to the charge pipe. Hmmm thermal issue? I moved the wire and it did not cut out the next two runs!

Next pass was 10.64 @ 138, best for this trans/tire combo! But it felt funny pulling up from the water to the line, like it was stuck to the track? Hmm... next pass, the car felt like it was stuck to the track again... whatever, ran with it. Wow, the whole way down the track I hade to steer to the right to keep it in the groove! Drove fine down return road.. hmmm... 10.80 at 133.

Looked at it last night, the right front brake is sticking. bad hose. Started putting new calipers and hoses on the front (both sides since it is all 26 years old!) and the metal line on the drivers side broke.. damnit! oh well, we'll see if we can get it done before this weekend...

[Rampage16V]

As soon as I read sticking to the track from burnout to the line I thought flex hose! Happened to me a few years ago with my rampage thought the exact same thing then

[Rampage16V]

Sounds like it's running good though 👍

[Aries_Turbo]

As soon as I read sticking to the track from burnout to the line I thought flex hose! Happened to me a few years ago with my rampage thought the exact same thing then

you know how many times ive had neon/turbo mopar/non-turbo mopar flex lines fail and make the brakes drag? how many of these cars have i had over the years? thats how many lol.

Brian

[BadAssPerformance]

As soon as I read sticking to the track from burnout to the line I thought flex hose! Happened to me a few years ago with my rampage thought the exact same thing then

Yeah, pretty sure that was it, but could probably use calipers too.

Sounds like it's running good though ��

Yeah, finally getting things sorted out, need more time to play with it!

you know how many times ive had neon/turbo mopar/non-turbo mopar flex lines fail and make the brakes drag? how many of these cars have i had over the years? thats how many lol.

Brian

I guess I've been lucky only my second one LOL

[Reeves]

FWIW, I use the stock Ford TPS with stock electronics no problems.

Glad to hear you are working out a ton of bugs!!

[Ondonti]

FWIW, I use the stock Ford TPS with stock electronics no problems.

Glad to hear you are working out a ton of bugs!!

Well since a lot of us run bigger TB's that obviously give a bogus amount of airflow per throttle opening compare to stock, it might not be a big deal and is more of a worry if you are a part boost throttle kinda person.
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Can I mentally knock off any time from the 10.64 for brakes dragging? Are you still worried about having to shift very quickly to make up time? Axles still good Pressure in the tires? I wonder how much different yours needs to be because of weight.

[BadAssPerformance]

FWIW, I use the stock Ford TPS with stock electronics no problems.

Glad to hear you are working out a ton of bugs!!

Thanks, finally! LOL

- - - Updated - - -

Well since a lot of us run bigger TB's that obviously give a bogus amount of airflow per throttle opening compare to stock, it might not be a big deal and is more of a worry if you are a part boost throttle kinda person.
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Can I mentally knock off any time from the 10.64 for brakes dragging? Are you still worried about having to shift very quickly to make up time? Axles still good Pressure in the tires? I wonder how much different yours needs to be because of weight.

I'll have data here in a minute, LOL

[turbovanman²]

The runners / raised port velocity stacks are on the side of the plenum and I was thinking crap, how the hell did it fly up into one of those? I'm sure it could have, but then, I think it would have hurt an intake valve, piston, head, exhaust valve, turbine ... hmmm.. looking at the pics the floor of the plenum is pretty much flat except the Air temp sensor and one vacuum/pressure tap... hmmmm... pull the vacuum line off and bingo, there's the screw! yay!
!

Lucky SOB.

[BadAssPerformance]

OK, here is a recap of the last three trips out...

Sept 29 2013 "Midwest FWD nationals" / Import day

Run #1 - No 2-step, spin 1st and 2nd, 30psi, high idle after run

R/T: 0.334
60': 1.760
330: 4.828
1/8 ET: 7.165
1/8 mph: 107.79
1000': 9.151
1/4 ET: 10.805
1/4 mph:136.90

Run #2- High idle (boost leak?) No 2-step, spin 1st and 2nd, 28psi

R/T: 0.299
60': 1.715
330: 4.744
1/8 ET: 7.134
1/8 mph: 105.49
1000': 9.168
1/4 ET: 10.866
1/4 mph:133.41

Found broken TB blade... new TB & fixed boost leaks

Oct 13 2013 "Import Wars"

Run #1 - No 2-step, spin then miss 2nd, 30psi

R/T: 0.301
60': 1.788
330: 5.218
1/8 ET: 7.734
1/8 mph: 100.94
1000': 9.798
1/4 ET: 11.478
1/4 mph:135.52

Run #2 - No 2-step, spin 1st and 2nd, cutout 4th thru the lights, 30psi

R/T: 0.334
60': 1.730
330: 4.714
1/8 ET: 7.065
1/8 mph: 105.34
1000': 9.082
1/4 ET: 10.781
1/4 mph:132.33

Noticed cam sensor wire look melted onto charge pipe. Maybe heat changed the resistance level and cause of signal loss? Moved wire over to check

Run #3 - No 2-step, spin 1st and 2nd, pull left slightly, 30psi

R/T: 2.175
60': 1.736
330: 4.752
1/8 ET: 7.044
1/8 mph: 107.21
1000': 9.006
1/4 ET: 10.644
1/4 mph:138.03

Run #4 - No 2-step, spin 1st and 2nd, pull left hard, steer right to keep in groove, 30psi

R/T: .133
60': 1.744
330: 4.754
1/8 ET: 7.110
1/8 mph: 106.42
1000': 9.138
1/4 ET: 10.835
1/4 mph:133.51

Found that front right brake locked up, replaced both front calipers and hoses, pretty sure it was the right hose, but figured I would replace everything 26 years old and bleed it once, but ended up bleeding it like 5 times

Oct 20 2013 "Bracket Weekend"

Run #1 - No 2-step, spin 1st and 2nd, 30psi

R/T: 0.408
60': 1.798
330: 4.803
1/8 ET: 7.089
1/8 mph: 108.53
1000': 9.033
1/4 ET: 10.646
1/4 mph:140.29

Run #2 No 2-step, hook for a second then spin 1st, spin and shake 2nd, 30psi

R/T: 1.782
60': 1.713
330: 4.722
1/8 ET: 7.008
1/8 mph: 107.73
1000': 8.945
1/4 ET: 10.557 <=== New PB!
1/4 mph:140.55 <=== New PB!

Not too much of an improvement over last year, but good enough to have the car beat last year's time, and also this was on the 24.5's quicker than the axle destroying 26's... hmmm...

[BadAssPerformance]

OK, dug through the archives to see what tire size and FDR have done for the car. Obvious that there are way more variables (air temp, launch rpm, shifting speed, etc) that I do not have exact data for but the ening combo has pretty much been the same and it is interesting that each combo is actually quite close...

24.5" tire with 3.50:1 A568 ~155mph in 4th at 7k (144 @ 6500)

Oct 2011
Run #2 - Used 2-step, spun a bit more on launch and into 2nd, granny 3, slightly open throttle 4, AGAIN cut out top end but was a new best run!

R/T: .108
60': 1.806
330': 4.792
1/8ET: 7.063
1/8mph: 110.81
1000'ET: 8.996
1/4ET: 10.623
1/4mph: 138.44


26" tire with 3.50:1 A568 ~164 in 4th at 7k (152 @ 6500)

SDAC-22 June 2012
Run #1 - Right off the trailer, cold tires @ ~11psi, moderate burnout (was too far in water so not too hot), 2-step, spin in 1st then hook, granny shifted, no cut out! felt decent, new PB!

R/T: 0.314
60': 1.7050
330': 4.6569
1/8ET: 6.9678
1/8mph: 108.74
1000'ET: 8.9131
1000'mph: 127.04
1/4ET: 10.5638
1/4mph: 136.85


26" tire with 3.85:1 A568 ~149mph in 4th at 7k (138 @ 6500)

October 2012
Run #1. 2-step, spin

R/T: 0.094
60': 1.760
330: 4.716
1/8 ET: 7.022
1/8 mph: 109.52
1000': 8.972
1/4 ET: 10.600
1/4 mph:139.66


24.5" tire with 3.85:1 A568 ~141mph in 4th at 7k (131 @ 6500)

Today, October 20, 2013
Run #2 No 2-step, hook for a second then spin 1st, spin and shake 2nd, 30psi

R/T: 1.782
60': 1.713
330: 4.722
1/8 ET: 7.008
1/8 mph: 107.73
1000': 8.945
1/4 ET: 10.557
1/4 mph:140.55