Last Option, if it doesn't work, then I am getting rid of it.

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crunchie12268

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Apr 10, 2005

#1

• Apr 10, 2005

• #1

Well after going to the track this weekend and getting slapped in the face for spending 2500 bucks and running a 14.37..... I have decided to do one last thing before I take it to get tuned. If the tuning doesn't fix it, then I will probably get rid of it.

This is the last option. I am going to self port my GT40 Cast Iron Heads and switch out my current Isky Cam (.480/.500 210*/218*duration) for the TFS 1 cam (.499/510 223*/225*duration... I think). I figure this will only cost me about 250 bucks because the TFS 1 is only 139.95 and then head gaskets on up. But I figure it will even be cheaper if I sell my Isky cam. That is why I am going to do this before spending 400+ to get it dyno tuned. Here are my questions:

1. I know it would be smart to get new springs so i was wondering if anybody could recommend a good set. Also, with GT40's and 1.6's, do you guys think I will get any Piston to Valve problems?

2. How much can I port the GT40's? Should I just put on the exhaust gasket and use it as a template? And should I do the intake side?

If this doesn't make this thing perform, then I am going to get rid of it, cuz I can get a stock stang and do the same damn thing. Please, help me out here guys.

 

just4bob50

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#2

• Apr 10, 2005

• #2

first off if the heads are origanal GT-40 castings and not the ( P seriesb ) dont port them yourself. save your dough and have a pro. do it. 2nd you didnt say if you put new springs on the heads when you swapped cams. If you didnt your probrably getting valve float by about 5500 rpm. especially if your still running 1.7 rockers. I would save your 250 bucks toward a tune, but before you take it make sure the motor is mechanicly correct so the tuner dosent have to spend time or your money to track down a parts problem. i dont know if your car is a 5 spd. or auto. let me know and i can give you some other ideas to go in. also how bout the rest of your time slip info.

 

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crunchie12268

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Apr 10, 2005

#3

• Apr 10, 2005

• #3

just updated my sig. I didn't replace the springs... we checked clearence and I was good so we just reused them. Why should a pro port the GT40's? they have three lines on them, I was told those are the cobra's

 

just4bob50

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#4

• Apr 10, 2005

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I dont know how much experience you have with porting heads, but gt-40 cobra heads are getting harder to find. I also know people who tried to port their own heads and completely screwed up the air flow caracteristics. practice on stock heads before you try the gt-40s. also your track time can depend on alot of other factors. my NA stock long block vert runs 13.6s. i drove my buddies 02 GT to a 13.72 the only time i drove it on the track and his best time is still a 14.14

 

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crunchie12268

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#5

• Apr 10, 2005

• #5

a have fully ported two sets of E7's, but if the cobras are easy to screw up then I will have a pro do it

 

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crunchie12268

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#6

• Apr 10, 2005

• #6

I drove this thing so hard that I felt bad for it at the end.... I slammed the gears hard, I spun a little off the line but I should add that there was a 40 mph head wind (not exaggerating) but i don't know if that takes alot away.

 

just4bob50

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#7

• Apr 10, 2005

• #7

well, i know that the difference between a lift shift technique and power shifting is 2-3 tenths, and every tenth on your 60ft you can drop is worth 2 tenths up top. my car is a 5 spd and when my cluch started to go i didnt realize it until my time started to drop into the 14s.

 

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crunchie12268

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#8

• Apr 10, 2005

• #8

lift shift? what is that

 

just4bob50

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#9

• Apr 10, 2005

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lift shifting is when you lift off the gas pedal during the time it takes to shift gears. power shifting is not lifting off the gas, but just slapping the clutch and hitting the next gear in less than 200 rpms.

 

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crunchie12268

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#10

• Apr 10, 2005

• #10

I lift shift then... powershifting sounds harsh.. this is my daily driver, I try to take care of it

 

DemonMustang

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Apr 10, 2005

#11

• Apr 10, 2005

• #11

i ran my stock 302 14.4 at 95 mph. driving it like i stole it.
funny thing is i also ran a 14.7 at 95 mph two years earlier.
details in the sig. crazy driving can drop the time big time if you feel like slaming the gears.

the wierd thing is why my car had a slower mph with the 14.4 over the slower time.

 

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Idwitheld-1`

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Apr 10, 2005

#12

• Apr 10, 2005

• #12

crunchie12268 said:

I lift shift then... powershifting sounds harsh.. this is my daily driver, I try to take care of it

Click to expand...

Before you spend another penny in hardware you should invest in seat time at the track. A 40MPH headwind is outrageous and will affect your et.

 

just4bob50

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#13

• Apr 10, 2005

• #13

I know, but my car is my daily driver for the last 5 years. it has almost 100,000 miles on it and my factory clucth finally went out 2000 miles ago. start out by just doing on the 1-2 shift until you get used to it. then the 3-4 shift. the 2-3 shift is the weakest part of the tranny. and that shift has to be dead on or bad things could happen. so far i have been running my car at the track 1-2 times a month spring through fall for the last 3 years and i have had know problems yet. Any how it sound like you got a decent combo of parts, springs excluded. ill bet its probrably a couple of little things holding you back.

 

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BaXTeR3221

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Orange County, NY

Apr 10, 2005

#14

• Apr 10, 2005

• #14

I would get the car tuned. That way, you can determine whether the problem is the combo or maybe it was just a weird day at the track. If it makes the numbers on the dyno and everything checks out, you just need more track time rather than spending more money on parts.

 

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crunchie12268

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#15

• Apr 10, 2005

• #15

I am not kidding either, it was clocked at 37mph, with gusts up to 45. But it was the first day it was open so everybody was itching.

 

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crunchie12268

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#16

• Apr 10, 2005

• #16

I just think the power should be there for better et's.... I don't know, I am so frustrated right now. I mean, I beat a LS1 by half a car, I have beat a SRT 4 by about 4 cars... and I get this BS 1/4 time

 

90_Red_LX

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Apr 10, 2005

#17

• Apr 10, 2005

• #17

Was this the first time you ever ran at the track? That wind did kill your time for one. I think you need to make a few more passes and get more seat time. What was the mph you ran it at? That right there will tell the story. How about the other stuff?

 

just4bob50

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#18

• Apr 10, 2005

• #18

deffinitly go back to the track and let me know how you do

 

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crunchie12268

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Apr 10, 2005

#19

• Apr 10, 2005

• #19

mph was 97.16

This is the first time I went to this track when it was prepped.... but I have made about 20 passes before. This is the first time I ever did it with this car.

 

93 teal terror

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Apr 10, 2005

#20

• Apr 10, 2005

• #20

What was your 60'?