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fast 78mm intake worth it ????
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fast 78mm intake worth it ???? I have a 04 gto & it has ls6 intake manifold. Is it worth spending anywhere from $450-$550 for a used fast 78mm intake ? How much addt'l horse power will i agin at the wheels with the fast intake ? I have a mild cam 222/224 566/568 112 LSA & 2800 stall torque converter,stainless work off road headers, tune currently 363 RWHP.currently i have ported & polished the throttle body.
Seeing as the LS6 intakes are going for pretty big money for a used factory manifold the 78 may be worth it if you can find a ecent deal on them. I have seen them go for 500$ which is only another hundred - hundred fifty over the ls6
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I got the FAST 78 on my GTO (mods in sig). I picked up 10 RWHP but lost 7 lb/ft of torque (I think my tune was pooched and will be redynoing in the spring). I bought the intake for $400 and sold the LS6 for $350 here so for $50 it was certainly worth it to me. I also didn't have to buy a 90 mm TB which saved about $400. If you do some research you'll see that the RWHP difference between the 78 and 90 is about 3~5 HP total (based on Tony Mamo's research).
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Verdad Gallardo Thread Starter
On The Tree
Joined: Jun 2007
Posts: 101
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I got the FAST 78 on my GTO (mods in sig). I picked up 10 RWHP but lost 7 lb/ft of torque (I think my tune was pooched and will be redynoing in the spring). I bought the intake for $400 and sold the LS6 for $350 here so for $50 it was certainly worth it to me. I also didn't have to buy a 90 mm TB which saved about $400. If you do some research you'll see that the RWHP difference between the 78 and 90 is about 3~5 HP total (based on Tony Mamo's research).
My advise to you is, if you do a FAST 78 intake,(which you will like) make sure you use a 78mm t/b as well. Trust me, you will see a huge difference between a ported stock t/b VS like a WILSON 78mm piece. I know from experience.
The 78 mm you will see gains over what you have now, but a 90mm setup you can take with you to another build down the road. As it stands i don't see you using a 90mm manifold to its full potential BUT, you will still see an increase in power and times. To answer it directly is it worth it yes, but is a 90mm a better investment, of course.
-Marcus
-Marcus
