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99-04 gt auto hellion single turbo help?

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Old 08-17-2009, 08:13 PM
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cabotgsxr
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Default 99-04 gt auto hellion single turbo help?

Im about to order a hellion power systems single turbo set up for my 02 gt automatic. I was wondering if there is anyone in here that has a 99-04 gt auto with the same system on there car. if so i have a few questions. First off i was wondering if there was any trouble installing the system being that its an automatic? also how much boost can you put down safely? and how much power does that amount of boost put to the tires. did you have to get get your transmission built and if so what all is done to it? A big question i have is how big of a stall should i get? thanks in advanced
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Old 08-18-2009, 07:01 PM
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bump!
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Old 08-18-2009, 07:30 PM
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99 GT vert
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i dont have the kit but i think your motor will go before your trans will stay around or below 400 rwhp on stock internals
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Old 08-18-2009, 09:04 PM
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GTRACER88
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Originally Posted by 99 GT vert
i dont have the kit but i think your motor will go before your trans will stay around or below 400 rwhp on stock internals

At 8 psi he will be over that... So this statement is wrong. Turbos are way more efficient that a supercharger, that being so they will make more power. I dont know if you will have any fitment issue. Best bet is to called helion directly and ask. You can put 8-9 psi safely. That will put you over 400 rwhp, my guess near 430-450 rwhp. Your transmission will hold but you might get converter slip. I do when i spray so im getting a new stall converter and im not at that power, yet . Mine is a daily driver and im going with somewhere between 3500-3700 stall. Pick something that will best suit your needs. Is your car a daily driver?
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Old 08-18-2009, 09:37 PM
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ddmsgtr1
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I would not try and push that kind of power. Tune it back to keep it under 400. Efficiency doesn't matter; blower or turbo, the stock internals just weren't made to take over 400hp, much less 450.
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Old 08-19-2009, 12:53 AM
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99 GT vert
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if you go over 400 rwhp with an auto you are just asking for trouble the amount of drive train loss between an auto and a manual is a decent amount. you can go 430 rwhp with a manual and may be fine but with an auto that is a ticking time bomb
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Old 08-19-2009, 10:37 AM
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liljojo4711
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how much are u getting the hellion kit for if i may ask
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Old 08-19-2009, 07:19 PM
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GTRACER88
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Originally Posted by ddmsgtr1
I would not try and push that kind of power. Tune it back to keep it under 400. Efficiency doesn't matter; blower or turbo, the stock internals just weren't made to take over 400hp, much less 450.
Incorrect. The stock internal go due to pressure not power. There is less pressure in the chamber with a turbo at the same psi because there is no parisitic loss from a supercharger. You can essentially run more efficiently and run more power than a supercharger while keeping less pressure inside the chamber. I have seen tons of GT's over 500 rwhp on stock bottom end. With turbos and superchargers. Highest i have ever heard about was 532...
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Old 08-19-2009, 09:21 PM
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liljojo4711
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Originally Posted by GTRACER88
Incorrect. The stock internal go due to pressure not power. There is less pressure in the chamber with a turbo at the same psi because there is no parisitic loss from a supercharger. You can essentially run more efficiently and run more power than a supercharger while keeping less pressure inside the chamber. I have seen tons of GT's over 500 rwhp on stock bottom end. With turbos and superchargers. Highest i have ever heard about was 532...
i would say that 95% of people on here say the stock bottom end is good for 400 safely and can go to 450. i have never taken my car that high but i would assume that based on everyone elses opinion anything over 450 is suicide on the stock bottom end for a dd... not really sure how many "a ton of GT's" are, but i doubt its a lot...
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Old 08-20-2009, 06:24 AM
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Originally Posted by GTRACER88
Incorrect. The stock internal go due to pressure not power. There is less pressure in the chamber with a turbo at the same psi because there is no parisitic loss from a supercharger. You can essentially run more efficiently and run more power than a supercharger while keeping less pressure inside the chamber. I have seen tons of GT's over 500 rwhp on stock bottom end. With turbos and superchargers. Highest i have ever heard about was 532...
what pressure r u talking about? boost? or load? if ur talking about boost pressure then ur wrong, 8 psi is 8 psi no matter if its turbo or s/c. the loss from a s/c is not significant enough to make or break an engine. im sure a stock gt bottom end can handle 500 hp/tq if the load applied was gradual. sharp rises of load in a perfectly tuned high power motor that is weak will show failure. basically if u race from a 60 mph roll ur less likely to break then if ur from a stop.
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