© Copyright 1995 thru 2008 - The Mustang Works™. All Rights Reserved.
MustangWorks.com is designed and hosted by Aero3 Media.
MustangWorks.com is designed and hosted by Aero3 Media.
04-15-2003, 09:11 AM | #1 |
Registered Member
Join Date: Jan 2002
Location: Albion, IN
Posts: 6
|
Time slip questions?
My first time out at the track and my car didn't seem to pull at all in 3rd gear (C4 trans). I'm wondering if anyone can tell if I have problems from looking at my timeslip information. 1st and 2nd pull hard to the shift point (6200 RPM) but when I shift to 3rd the tack stays at 5000 RPM and doesn't budge. 3rd gear feels like I'm on cruise control.
60ft - 1.700 660ft - 7.760, 87.55mph 1320ft - 12.460, 99.56mph Specs: 347 cubic inch, Twisted Wedge Heads, Holley Systemax intake, Trick Flow Stage 2 cam (545 in 565 ex), 42 lb injectors, 70mm Throttle Body, 80mm Pro-M mass air, Cartech fuel system with -8 feed -6 return, Paxton Regulator @ 45psi, PMS, C4 Trans, PI 3500 stall converter, 3.73 gear, 28 x 12.5 ET Streets, car wt 3200 lbs Thanks for your help. |
04-15-2003, 09:34 AM | #2 |
Registered Member
Join Date: Mar 2002
Location: sherwood Forest
Posts: 291
|
I have heard cars do that at the track and wondered if they are suppose to sound that way. It sounds like converter issues, but i really dont know. obviously you did pick up mile an hour, 87 to 99 but if your tach stays at 5000 rpm then it sounds like your converter was locking up to produce mph rather than the motor????
__________________
84 gt350 89 lx vert 92 lincoln lsc. All Forced ( one way or another) |
04-15-2003, 10:51 AM | #3 |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
|
Obviously something is wrong your car is about 7mph short of whereit should be.
Most cars pick up 20+ mph from the 1/8th to the 1/4 you only picked up 12 mph. Something aint right,
__________________
92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
04-15-2003, 12:19 PM | #4 |
I'd rather be basketweaving
Join Date: Feb 2000
Location: Indianapolis
Posts: 2,551
|
Sounds like a torque converter issue to me.
__________________
NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft |
04-15-2003, 03:43 PM | #5 |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
|
With that 1/8th mile your 1/4 mile time shoulda been a 12.11 @110mph.
Thats what the analyzer said
__________________
92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
04-15-2003, 04:00 PM | #6 |
Registered Member
Join Date: Jan 2002
Location: Albion, IN
Posts: 6
|
I talked with Harold at Dynamic Racing Trans and he thinks that the converter is not stalling high enough. He recommended at least a 4200 RPM stall.
Using the footbrake, it's difficult to raise the RPMs to 2000 before it pushes the car. Harold said I should be able to foot brake it to 3000 to 3500 RPMs. PI built the converter with all of my information and said it should stall at 3500 to 3800 RPM. What do you think? I realize my 3.73 gear ratio and 28 inch tall tires are not ideal for my natural aspirated 347 but they should be close after I get a YS trim on there. |
04-15-2003, 05:40 PM | #7 |
Registered Member
Join Date: Sep 2002
Location: baltimore, md
Posts: 220
|
i have a c-4 with a Performance automatic 3500 stall...with everything in my sig i had...
1.68 60ft 7.93 1/8 @ 85.65mph 12.57 1/4 @ 105.12mph I also have a 373 gear with a 28 tall tire....
__________________
90 LX Hatchback 306, AFR 165's 58cc, E303, 1.6 roller rockers, 70mm throttle body, cobra intake, bbk fenderwell, bbk longtubes, x-pipe, flowmasters, pullies, msd 6a, crane ps-92, stock MAF sensor, electric fan, No AC, No air pump, flaming river quick ratio rack C-4, 3500 stall, 373's, aluminum driveshaft SSM Lift bars, , sub frame connectors, strut tower brace 12.57 @105.12mph w/ 1.686 60ft before bbk longtubes (with equal shorties) ----------------------------------------- 86 tube chassis coupe - the trailor queen |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Questions: Just got my Paxton Novi 2000! | LfiveohX | Windsor Power | 8 | 02-12-2002 12:27 AM |
Nitrous Questions for 99GT | Swarzkopf | Modular Madness | 8 | 01-08-2002 10:16 AM |
First time at the track and loved it! | Silver2000GT | Racer's Club House | 0 | 09-21-2001 12:10 PM |
1st worthwhile race in a LONG time | 84stangLX | Stang Stories | 12 | 04-20-2001 04:47 PM |
My First Time Racing (long) | lx mike | Stang Stories | 8 | 03-27-2001 09:58 PM |