Another Gen 5 whipple thread .

[esacteksab]

As someone who has been 10.12 @ 145.5, I can empathize. But if I had your 60'... Definitely looking forward to your progress and outcome.

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[olaosunt]

As someone who has been 10.12 @ 145.5, I can empathize. But if I had your 60'... Definitely looking forward to your progress and outcome.

Thanks man , definitely hurts especially as this is my second “10.0” car . I am sure dropping a pulley size will get me that 9.99 but I will have to run race gas until I install the return fuel system as I am sure I will be out of fuel with the BAP/DW400.

My 15 /3.2 KB car also went 10.03@145 but that has a 2.66 Magnum XL and I was only running a 3.31 rear end .

Sincd I switched to a 4.10 rear end I have not been able to get a clean pass.

First the RXT clutch had to be replaced and then it blew a head gasket . I replaced the head gasket but it is now lifting heads (blown head gasket again?) on the dyno -air is getting into and over pressurizing the coolant over flow tank.

I had a new motor built for it over the winter in preparation for sale but I am tempted to run it one more time get that 9.99 before the new motor goes in .

Just scared of blowing coolant at the track.
If I take the motor out now I may be able to save it/redeck the heads/block/refresh and hopefully sell as a spare with the car or on its own .

I just hope I can resist the temptation to race it with the new motor

 

[olaosunt]

My car is a PP1/401a/magneride so probably heavier than the base cars that have gone 9’s with my same set up . The 3.55’s are probably also not helping .

May be if I drop to a 3.15 rear end with my 28 inch tires it will stay in 6th but I suspect I will need a taller tire(not sure I can go taller as is lowered with Eibach springs ).
A second gear launch might also help by avoiding the timing drop from 1-2 / one less shift .

 

[rtg]

So is this a transmission issue ?

Here is a pic of the log of 10.0 pass with rpm/spark in orange and torque control in blue .

Knocks spark down on 1-2 , 3-4 and 5-6 shifts .
First time value is 26 (don’t know what that is) ,second time is 7-16 and third time 16 .

I got this from the HPTuners Forums. Thanks to LastPlace for the information.

TQ_CNTL source:

0 - Driver Demand
1 - Transmission Torque Truncation
2 - Traction Control / Collision Mitigation By Braking
3 - Vehicle Speed Limit
4 - Engine Speed Limit
5 - Tip-In Management
6 - DFSO
7 - Shift Modulation
9 - Target N
10 - PTLP FMEM (Powertrain Limiting Protection)
11 - ETC FMEM - RPM Guard
12 - PATS
13 - OSCMOD / Anti-Shuffle
14 - Cruise Control
15 - Low-Range/Driveshaft Protection
16 - Decel / Dashpot
17 - VDE
18 - IMEP Limit
19 - CSL Limit
20 - HEV Start/Stop
21 - HEV Tipout
22 - Idle Speed Control
24 - Torque Steer
25 - MSR/Drag Torque Increase
26 - Transmission Torque Increase
27 - Wheel Torque
28 - TCM Not Alive
30 - HEV Fast Reduction

8, 23, 29, 31 are not used.

Rob

 

[olaosunt]

Thanks for the above information . I already knew about 7 and 16 (I had the GT 350 table ) but looks like 26 is also transmission related.

I got an updated tune and was able try it out today
Only made one pass as my bumper/splitter keeps falling/hanging down (I think it’s the crevini lower grill that has stretched the tabs ?)

Another 10.0. It seemed to leave harder and I could tell it was faster up to the 1/8 then seems to falls on its face especially after it shifts to 7th gear.
I thought I had it but ..... no .

The torque control is less intrusive and only on 1-2 and 5-6 shifts but does not knock timing down past 19(from 22-23 peak ).
I also noticed lower rpm shift points ans crossing the traps@6100 in 7th is not helping .
I may try a 26 inch tall slick(15 wheels so will need to swap in Baer brakes I already have ) I had tried with my KB car when it had a 3.31 rear(2.66 first Magnum ).
It let me trap in third at 145 mph in the KB car ! It did not however have a chance once I swapped the 4.10’s.
The 26 inch tire may help cross the traps higher in 7th rather than having to swap the rear end to 3.15/ taller than 28 inch tire to stay in 6th . Not sure if 7th is slipping .

I may just give up on the 3.625/E85 combo and pulley down to the 3.5 /race gas since it made the most power to date . Still made low 800’s with the 3.625/E85 so I was expecting at least low 140 traps and not high 130’s .
I have a 3.375 “kill”pulley for c16 if needed .
Should also be fine with E85 once I install the return system .

Ordered the Steeda bumper (not from steeda but from the manufacturer) as the splitter falling down could be a disaster @140 mph .

 

[olaosunt]

Pics of my saggy lower grill /splitter

I ordered a new bumper from air design .

Looks like they make the “steeda” bumper but you can order from them for almost half the price !

 

[olaosunt]

My trap is down 4-5 mph compared to lethal and HRSEPLA when they went 9.7@144 and 9.8@145 respectively with similar set up to mine .

Looks like they picked up 31-31 mph on the big end compared to my 26-29 mph .
HRSEPLA’s was in 400 DA which is about the same as my 10.04 pass

They both have long tubes /no cats compared to my stock manifolds and cats . Not sure if that can make up the difference but I plan to delete my cats .

HRSEPLA’s car I believe is a base /3.15 car so I may have a few pounds on him .
https://www.mustang6g.com/forums/th...a10-transmission-converter-build-time.119137/

 

[esacteksab]

E-85? Is it pump E-85? Have you tested the ethanol content? When I'm on E-70'ish, I'm down MPH. On E-85, actual E-85, I can see 140 or so. On C-85, I saw 145.5.

 

[olaosunt]

Pump E85 but tested at 85 .

Tuner thinks it’s the cats .

I will delete them eventually . I just want that 9 first without the noise .

Next time out I will pulley down to 3.5 pulley and run race gas .
If I don’t get that 9 then the cats come off .

 

[PC 2015]

Pump E85 but tested at 85 .

Tuner thinks it’s the cats .

I will delete them eventually . I just want that 9 first without the noise .

Next time out I will pulley down to 3.5 pulley and run race gas .
If I don’t get that 9 then the cats come off .

PM you

 

[olaosunt]

Since I am crossing the traps with my 3.55 rear end at about 6000 rpm(7th gear )@140 I figured the 6-7 shift is also killing ET.

I have heard of others swapping the rear end to a 3.15 and using a 29 inch tire to stay in 6th but my car is lowered so that tire would not work .

I did some calculations using the Tremec gear calculator using the 1.28 6th gear ration (7th is 1:1)
I have a couple of options available to me

The easiest would be trying my 26 inch slicks which would mean a little more acceleration and I would cross the traps at about 400 more rpm but again after 6-7 shift .

I have a 3.31 iron rear end assembly that came out of my KB car after I swapped them for 4.10’a
Looks like the best option as It would stay in 6th crossing the traps@7150 rpm/140 mph .
If I pick up power it would still let me cross @7500/147mph

 

[olaosunt]

Torque management is probably saving your transmission..

I think you were 100% right about this .

I ended up swapping in a 3.31 rear end and got new tune with reduced “improved “ torque management .
First pass 2 weeks ago with new tune(Ms109) it went 128 mph ! (Down 10 mph ) . It was about 2500 DA but hard to imagine that would slow car down that much .
It looked like it was still short shifting 6th and going into 7th gear so making things even worse since I now had 3.31

I went back to an earlier tune version and it picked up 4 mph .

I then ran the C16 tune(with reduced torque management) with increased timing and it picked up some to 136 mph .

I tried going to a 3.375(from 3.5) but found the pulley was the wrong offset .
I broke out my 3.25 grip tech and it picked up another 2 mph to 138 mph... still short shifting 6-7 so still crossing the traps in 7th

I was convinced a new tune with increase shift RPM especially to allow to me to stay in 6th thought the traps would be the ticket .

So I got new tune(went back to 3.5 as belt was too long for the 3.25...and scared ) and ran it again last week ... big fail !
Car short shifted every gear and does not looks like it put any power down .-trapped 110 !!!
Logs otherwise looked perfect with usual load /timing /negative knock /fuel .
No noises from motor or smoke/oil or coolant loss
No codes .It will rev to 6500 then short shift .
I had been getting a lot of the rpm flares in almost all gears . When I used the paddle shifts it’s worse in second (it skips this in auto )

I assumed my clutches are toast or something else in the transmission.

I had dropped off the car at body shop to fix saggy bumper after last weeks fail.
I picked it up went back today and decided to test an earlier tune version in case it was the reduced torque management but did the same thing .

Looks like I need new clutches . (Already have them as I ordered last week ) . My dealer wants $1700 to install !

I am thinking the clutches may have been slipping from the get go hence the lower than expected traps but the reduced torque management and the 3.25 pulley may have been the final straw!

 

[olaosunt]

Looking on the the bright side my saggy bumper is fixed !

 

[jrsimon27]

First rip at the track this year and first time with PBD tune /3.625 pulley/DW400 and BAP/E85
Disabled advace trac using toggles and ran in D/drag mode but torque management kept knocking timing down every shift . Made 2 passes . Went 10.17@137 with street set up and 10.0@139 with ET R’s and skinnies up front
Kind of dissapointed as was expecting high 9’s @140+ as I went 10.2@138 last year with the same pulley and whipple 93 tune(ran race gas or boostane )


Torque control readings were 16 (torque based decel ) and 7 (transmission shift modulation ). No 2’s which is traction control .
Tuner advised to disconnect plug so I did and went back few days later today. Also advised to leave at 1500 rpm (I had been leaving at 1800)

Same 60 ft but ran slower to 330, 660 and 1320 ft (same traps ) although it was hotter out today.
Torque control is still knocking down timing with same tables so called it a day after 2 passses (I should have but did not compare with plumg connected as I developed a sagging bumper)


I am hoping it’s something tuner can fix in the tune . Next time out plan on running the 3.5 pulley and race gas .

I will eventually go back to E85 when I install the JN2uning return fuel system(dual DW 400 pumps in GT 350 hat ) sitting in my storage (and use up the 30 gallons of race gas in my garage.

Top slips from today and bottom from Wednesday.

Maybe a different DA?

 

[Burkey]

Had it unplugged today and it did NOT help . Actually ran slower to 330, 660 and 1320 by .1 with same 60 ft .
Ran in both drag and normal mode with almost identical times I might try it in track mode-next time out.

Are you saying you tried it both plugged and un-plugged on the same day?
Are you taking notes on DA, IATs etc etc?

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