Advice on parts

98Cobra2020

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I am currently building a 4.6 teksed block cobra with 9.1 compression .40 over cp pistons. I am going to be pushing 15 pds of boost either thru procharger or turbo setup. I am running 04 cobra heads with 98 cams with 04 mach 1 intake. What would be best for a flywheel stock or exedy lightweight? What is the best fuel rail system that is recommended for this setup that I am doing? How do you feel about the 6 puck clutch vs. the plain circle disked clutch?
 

mvk13

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There are far smarter people than I that can guide you but what do you want to do with your car? What are your goals?
 

98Cobra2020

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Basically what I said push 15 lbs of boost and daily driver im just trying to figure out whether or not a exedy lightweight flywheel is better for this or a stock flywheel? And if i should get 6 puck clutch or the round disk style? And the best fuel rail system?
 

mvk13

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We have kind of similar builds (10.67:1 here), but I'm only running 10# with a gen2 FF On3 70mm/.68 AR, 98 cams and Teksid. I'm running modified stock 98 cobra rails on the 01 cobra intake with an aeromotive fpr, frpp 52# injectors and a Walbro TU227-HP2 300lph pump and It's at 450/450 at the wheels. Haven't had any issues with fuel. I tried running an 03/04 aluminum flywheel/clutch and went back to the 01 nodular flywheel. It didn't have the same grunt when shifting with the lighter setup. I felt I had to rev higher before letting the clutch out. I'm still running an 04 clutch and no issues 2 years and 15k mi later and still running a T45 if that helps. I have some aeromotive rails/fpr and dual 044s waiting for the winter..
 

98Cobra2020

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We have kind of similar builds (10.67:1 here), but I'm only running 10# with a gen2 FF On3 70mm/.68 AR, 98 cams and Teksid. I'm running modified stock 98 cobra rails on the 01 cobra intake with an aeromotive fpr, frpp 52# injectors and a Walbro TU227-HP2 300lph pump and It's at 450/450 at the wheels. Haven't had any issues with fuel. I tried running an 03/04 aluminum flywheel/clutch and went back to the 01 nodular flywheel. It didn't have the same grunt when shifting with the lighter setup. I felt I had to rev higher before letting the clutch out. I'm still running an 04 clutch and no issues 2 years and 15k mi later and still running a T45 if that helps. I have some aeromotive rails/fpr and dual 044s waiting for the winter..


Ok what would set your ring gap to running 15 pounds of boost on the high side? How much blow by would it have running less that 15 pds of boost on the low side?
 

SVT GI

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Your main issue is going to be going .040 over on a teksid. Do some research, .020 over is the max with any boost and .030 is only good for NA. The factory sleeves will be too thin to be within safe specs for what you’re planning. Rule of thumb with a teksid is to go as little as you can to clean up the cylinders and stay close to factory bore.
 

98Cobra2020

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Your main issue is going to be going .040 over on a teksid. Do some research, .020 over is the max with any boost and .030 is only good for NA. The factory sleeves will be too thin to be within safe specs for what you’re planning. Rule of thumb with a teksid is to go as little as you can to clean up the cylinders and stay close to factory bore.



Well its a little late considering the rebuild before I got it was already. 30 over it jumped timing 2 teethe and I already have my cp pistons .40 over.
 

shurur

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I think these guys are right.
I have not done any motor work, but know the general rules by reading countless threads.

I would contact or post up on Todd Warren's (na svt) FB page and see what folks there say just to get a consensus of how to proceed.

NA SVT Camshafts, Modular Tech Group Public Group | Facebook


Please post up here later; so as to not abandon yet another build thread in svtp.
 

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