whats wrong

TMASTER · 06-07-2003, 12:35 AM

I raced a buddy of mine tonight and i didnt pull him like i thought it was the same as before i added the mods. Running stock cam still.

Ive added GT40 heads, TFS intake and 1.7 roller rockers. And my car is not any faster!!!!! I have the stock cats on the pipes but i dont think that would choke it that bad!!! I have hooker headers on it and 2 chamberd flowmasters.
What could be wrong? Not enough fuel pressure? I have a 190 pump, but im using a stock regulator... Im stumped!! please help!

Coupe50h · 06-07-2003, 01:16 AM

What size tb and maf do you have? you know im kinda in the same boat, i added ported gt-40's, and e-cam, i went 13.25 with stock intake, before those mods i went 13.27?

doing some tuning, and adding a better intake my car feels stronger, i dont know what to tell you at this point, except play around with fp and timing, did you keep the stock springs? have the heads been milled?

im not too happy with the gt-40 heads, i do need better springs though.

my car seems to like about 44 psi vac off on fp, runs strong with that.

TMASTER · 06-07-2003, 01:31 AM

I have 70mm TB and egr, 73 C&L, hooker headers, flowmasters on it.
The heads have had a 3 way valve job, milled .010, Double springs, pocket ported. Fuel has the be the problem! I cant belive it runs the same with the mods i have added.

Coupe50h · 06-07-2003, 01:42 AM

My heads have the same work except for the springs, i didnt feel a huge difference in my car, but my dad rode with me and said it felt stronger, only way to know is dyno or track, seat of pants is hard to tell unless you spray it with a 150 shot

Coupe50h · 06-07-2003, 01:44 AM

btw, where in tx you from?

TMASTER · 06-07-2003, 08:49 AM

Are yout still running the stock intake? If so that is choking you!!!
But we might have the same problem, i'm going to take mine in next week and see whats wrong. Oh and moving to san marcos this week.

drtbiker · 06-08-2003, 06:00 PM

You know what i have noticed this, everyone running the 73mm maf seems to be having issues. They are also not seeing that much in increase in times. I am going to try a 76mm and see what happens. They key is timing and fp. I am running close to 24 degrees of timing and the car still wants more...

later

Coupe50h · 06-09-2003, 01:21 AM

Quote:

Originally posted by TMASTER
Are yout still running the stock intake? If so that is choking you!!!
But we might have the same problem, i'm going to take mine in next week and see whats wrong. Oh and moving to san marcos this week.

Oh man, im not far from sm, let me know, we go to san marcos every sat for some cruising, hanging out, im closer to new braunfels, shoot me a pm when you move.

hey on the subject, try replacing your fuel filter, i did that today and the car woke up

then again i ran my tank dry a few days prior, that caused the filter to clog.

tmoss · 06-09-2003, 07:25 AM

Quote:

Originally posted by TMASTER
Are yout still running the stock intake? If so that is choking you!!!

I can fix that for $100 + $30 shipping by porting the lower. Many references if your interested - pm me.

Here is a pic of my work

Ackbar00 · 06-09-2003, 11:41 AM

Quote:

Originally posted by drtbiker
everyone running the 73mm maf seems to be having issues.

Mine has no Trouble. Ok Step one, get a Fuel Pressure Regulator and a guage. This is probley the single most important tuning tool you can have. Second, Get a Shift Lite. Consistant shifts are a must for tunning. When I first put my current combo together, it went 101MPH. Sad Eh? With 19# Injectors I am running 48PSI of FP. Stock is only 38psi I belive. It will take some time to get it right, but take it to the track every week and play with it. My timing is 16 and my shift lite is set to 5600RPM.

A buddies combo alot like yours except he has a ported stock intake compaired to your TFS, he went 105.66 with no shift lite and no FP guage. He just got his guage and his regulator was set to 44psi. He is getting his shift lite sometime next week.

Hope this helps.

302 LX Eric · 06-09-2003, 12:17 PM

Are you using the proper length push rod?

E

TMASTER · 06-09-2003, 07:14 PM

Hey guys, Yeah i got a kirban Adjustable fuel pressure regulator, and a guage comming on wed !

44 psi you say? im gonna try 40 psi first, I also slapped on the offroad H-pipe on today for more flow, what should i set my timming at? is at 13 right now.
Also using stock pushrods with 140k on them hahah! they were in good shape. Oh and i replaced my fuel filter last year, and replaced my pump a month ago.

Ackbar00 · 06-09-2003, 10:09 PM

Now remember, all guages are different. 44 psi on his guage may be 40 on yours. Just slap it on and take it to the track. Change 1 thing at a time. Id say set timing to 15 and FP to 40psi. Make that your basline. Than just change FP in 1 PSI incrimints(cant spell). Keep doing it till the car gets slower, than go the oter direction with it. DONT FORGET A SHIFT LITE!!! It is very important from a tuning standpoint. Plus it just is plain cool!!

TMASTER · 06-09-2003, 11:43 PM

sounds good.
Hey when i was putting the rockers in last week, On a couple i guess I didnt get the pushrod lined up right on the lifter and rocker, so when i was tourqing it down, it made the spring close reall far, then the spring popped up and the push rod went into place!!! I hope i didnt damage the cam or the lifters. The motors running fine, but I dont think that would hurt it would it? hope I didnt bend any pushrods either! anyone ever do that? when putting there rockers on by accidenT?

Shogun · 06-10-2003, 03:16 AM

Ok, if the crank, rods, pistons and heads are the heart of the motor, then the cam is the brains. Get an E, F, or TFS stage 1. Your slowing down because the air velocity is slowing down dew to the increased volumeteric efficiency of your induction and exhaust systems. Your cam simply can not keep up with the new found potential of the induction and exhaust systems. Air is moving to slowly through your motor. Remeber, a motor is nothing more than an elaborate air pump. The goal is to get as much air in and out as quickly as possible. All the components must work in concert to achieve this. If any one of those mechanisms is not up to the task, you will be slower. Rasing the fuel pressure may help. However, adding more fuel might only compound your current problem. In my opinon, your TB is to big for the application. A smaller TB and a larger mass air would yield greater results. Also, I think a larger cam is the cure for your horsepower woes. Sorry for the thesis guys.

Ackbar00 · 06-10-2003, 05:37 AM

Quote:

Originally posted by Shogun
Your cam simply can not keep up with the new found potential of the induction and exhaust systems. Air is moving to slowly through your motor.

Why I agree that a cam would be good for his combo, my stock cam is not slowing me down one bit. Almost 110 mph in the 1/4mi and 300HP to the wheels with a stock cam right here.

TMASTER · 06-10-2003, 10:12 AM

Yeah i was afrade of that, I didnt put a cam, in i was on a budget, and it was more work to do it, I spent more on the heads so I figured that those would make up for the cam. I'll find out when i get my guage in so i can get my regulator on.

I was reading some flow data for the GT40 heads, and from .500 lift to .600 lift, the increase in flow wasnt even significant, now thats just on the flow bench, probably with the valves open a bit further, dont know if that takes account for the duration. So is the cam really gonna help....

http://www.jason.fletcher.net/tech/f...a/castiron.htm
http://www.jason.fletcher.net/tech/f...a/aluminum.htm

take a look at these, some good input! When you decide to choose some heads, Eveyone thinks ohhh AFR!! those are the best out of the box heads, well i dont know about that buddy...

Edelbrock ???

06-07-2003, 12:35 AM	#1
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	whats wrong I raced a buddy of mine tonight and i didnt pull him like i thought it was the same as before i added the mods. Running stock cam still. Ive added GT40 heads, TFS intake and 1.7 roller rockers. And my car is not any faster!!!!! I have the stock cats on the pipes but i dont think that would choke it that bad!!! I have hooker headers on it and 2 chamberd flowmasters. What could be wrong? Not enough fuel pressure? I have a 190 pump, but im using a stock regulator... Im stumped!! please help!

06-07-2003, 01:16 AM	#2
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	What size tb and maf do you have? you know im kinda in the same boat, i added ported gt-40's, and e-cam, i went 13.25 with stock intake, before those mods i went 13.27? doing some tuning, and adding a better intake my car feels stronger, i dont know what to tell you at this point, except play around with fp and timing, did you keep the stock springs? have the heads been milled? im not too happy with the gt-40 heads, i do need better springs though. my car seems to like about 44 psi vac off on fp, runs strong with that. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

06-07-2003, 01:31 AM	#3
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	hmm I have 70mm TB and egr, 73 C&L, hooker headers, flowmasters on it. The heads have had a 3 way valve job, milled .010, Double springs, pocket ported. Fuel has the be the problem! I cant belive it runs the same with the mods i have added.

06-07-2003, 01:42 AM	#4
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	My heads have the same work except for the springs, i didnt feel a huge difference in my car, but my dad rode with me and said it felt stronger, only way to know is dyno or track, seat of pants is hard to tell unless you spray it with a 150 shot __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

06-07-2003, 01:44 AM	#5
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	btw, where in tx you from? __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

06-07-2003, 08:49 AM	#6
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	hey Are yout still running the stock intake? If so that is choking you!!! But we might have the same problem, i'm going to take mine in next week and see whats wrong. Oh and moving to san marcos this week.

06-08-2003, 06:00 PM	#7
drtbiker Registered Member Join Date: Jan 2002 Location: Mt. Prospect,IL Posts: 474	You know what i have noticed this, everyone running the 73mm maf seems to be having issues. They are also not seeing that much in increase in times. I am going to try a 76mm and see what happens. They key is timing and fp. I am running close to 24 degrees of timing and the car still wants more... later __________________ 87-ford-mustang-SOLD! mods: 3:73's, off road h-pipe, b303 cam in gt- 40 motor w/ Power Plus intake, edelbrock 70mm tb & egr spacer, 72mm C&L, bbk long tubes, tremec tranny, centerforce dual friction clutch, upr and lwr CA's 255lph FP and soon more to come.... when i have money again SOME ADVICE Don't do burn outs in reverse it is very expensive New times with dead hook on dr's 13.27@103 with 2.0 60 foots w/100lb system Fastest time to date: 12.8@113

06-09-2003, 12:17 PM	#11
302 LX Eric or '331 LX Eric' Join Date: Jan 1999 Location: Columbus, Ohio Posts: 2,142	Are you using the proper length push rod? E __________________ 1991 5.0 LX Coupe - 40,750 miles 331 cu. in. / Tremec 3550 / BFG Drag Radials 12.22 @ 114.31 mph - w/1.89 60'

06-09-2003, 07:14 PM	#12
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	wow Hey guys, Yeah i got a kirban Adjustable fuel pressure regulator, and a guage comming on wed ! 44 psi you say? im gonna try 40 psi first, I also slapped on the offroad H-pipe on today for more flow, what should i set my timming at? is at 13 right now. Also using stock pushrods with 140k on them hahah! they were in good shape. Oh and i replaced my fuel filter last year, and replaced my pump a month ago. Last edited by TMASTER; 06-09-2003 at 07:20 PM..

06-09-2003, 10:09 PM	#13
Ackbar00 Rebel Fleet Commander Join Date: Oct 2001 Location: Huber Heights, OH Posts: 1,003	Now remember, all guages are different. 44 psi on his guage may be 40 on yours. Just slap it on and take it to the track. Change 1 thing at a time. Id say set timing to 15 and FP to 40psi. Make that your basline. Than just change FP in 1 PSI incrimints(cant spell). Keep doing it till the car gets slower, than go the oter direction with it. DONT FORGET A SHIFT LITE!!! It is very important from a tuning standpoint. Plus it just is plain cool!! __________________ 1993 Mustang GT, PTK w/ T-64 - My Cardomain Webpage 11.25@123.5 on only 8 psi. 10.84@121 on only 1 headgasket "The Truth is, Your the Weak, and I am the Tyranny of Evil Men!"

06-09-2003, 11:43 PM	#14
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	ok sounds good. Hey when i was putting the rockers in last week, On a couple i guess I didnt get the pushrod lined up right on the lifter and rocker, so when i was tourqing it down, it made the spring close reall far, then the spring popped up and the push rod went into place!!! I hope i didnt damage the cam or the lifters. The motors running fine, but I dont think that would hurt it would it? hope I didnt bend any pushrods either! anyone ever do that? when putting there rockers on by accidenT?

06-10-2003, 03:16 AM	#15
Shogun Registered Member Join Date: Feb 2002 Location: Nebraska Posts: 86	Ok, if the crank, rods, pistons and heads are the heart of the motor, then the cam is the brains. Get an E, F, or TFS stage 1. Your slowing down because the air velocity is slowing down dew to the increased volumeteric efficiency of your induction and exhaust systems. Your cam simply can not keep up with the new found potential of the induction and exhaust systems. Air is moving to slowly through your motor. Remeber, a motor is nothing more than an elaborate air pump. The goal is to get as much air in and out as quickly as possible. All the components must work in concert to achieve this. If any one of those mechanisms is not up to the task, you will be slower. Rasing the fuel pressure may help. However, adding more fuel might only compound your current problem. In my opinon, your TB is to big for the application. A smaller TB and a larger mass air would yield greater results. Also, I think a larger cam is the cure for your horsepower woes. Sorry for the thesis guys. __________________ Proud RHC member #99 1990 Mustang GT Trick Flow heads,F303,Mac cold air,FMS 65mm tb,73mm ma,FMS 1.6,GT-40 intake,MSD igintion,NOS Big Shot@150,Mac equal shorties,Mac h-pipe,American Thunder flows,Centerforce dual friction,TTC 3550,alm drive shaft, 3.73's, HPM subframes, k-member brace, strut tower brace.. amongst others.

06-10-2003, 10:12 AM	#17
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	hmm Yeah i was afrade of that, I didnt put a cam, in i was on a budget, and it was more work to do it, I spent more on the heads so I figured that those would make up for the cam. I'll find out when i get my guage in so i can get my regulator on. I was reading some flow data for the GT40 heads, and from .500 lift to .600 lift, the increase in flow wasnt even significant, now thats just on the flow bench, probably with the valves open a bit further, dont know if that takes account for the duration. So is the cam really gonna help.... http://www.jason.fletcher.net/tech/f...a/castiron.htm http://www.jason.fletcher.net/tech/f...a/aluminum.htm take a look at these, some good input! When you decide to choose some heads, Eveyone thinks ohhh AFR!! those are the best out of the box heads, well i dont know about that buddy... Edelbrock ??? Last edited by TMASTER; 06-10-2003 at 10:28 AM..

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