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Fast 90 worth it

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Old Jun 14, 2008 | 10:08 PM
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Default Fast 90 worth it

With all the mods i have now, would a fast 90/90 set up yield more power, if so how much?
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Old Jun 14, 2008 | 10:10 PM
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10-25whp depending on your car.
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Old Jun 14, 2008 | 10:38 PM
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You should have an LS6 intake on there. I just installed a 92/92 combo and got an increase of about 10 HP but 0 TQ. About $120 per HP. Not worth it. But i've also got stock heads.
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Old Jun 14, 2008 | 10:40 PM
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A lot will depend on your supporting mods. On a stockish car, LS6 is great..on a cammed and greater car FAST 92 rocks.
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Old Jun 15, 2008 | 11:31 AM
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You will definitely pick up a good bit of power considering you're already running heads/cam! Even if you have an LS6 intake now I would be you pick up at least 25RWHP.
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Old Jun 15, 2008 | 11:36 AM
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25? That's pushing it I think.
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Old Jun 15, 2008 | 11:54 AM
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It's a good mod on a H/C car. I'd be getting one if I weren't planning for FI down the road.
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Old Jun 15, 2008 | 01:47 PM
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Originally Posted by Martin HD-28
25? That's pushing it I think.
I picked up 29RWHP going from 399 to 428 when I added a 90/90 setup with an UD pulley and tuning for the new intake. With nice heads the gains are going to be even more.
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Old Jun 15, 2008 | 01:54 PM
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WOW! I only picked up 10 RWHP and 0 TQ. I have UD pulley, 224/228, .581 cam, longtubes, 4.10's. I had it retuned after the 92 combo install and just picked up 10. I'm highly dissappointed. Got any pointers? Possible reasons?
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Old Jun 15, 2008 | 02:17 PM
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Originally Posted by Martin HD-28
WOW! I only picked up 10 RWHP and 0 TQ. I have UD pulley, 224/228, .581 cam, longtubes, 4.10's. I had it retuned after the 92 combo install and just picked up 10. I'm highly dissappointed. Got any pointers? Possible reasons?
You do have a smaller cam but that doesn't explain why the gains would be that much smaller. Who tuned it after the install? I should clarify that the intake was bought used and there was definitely material removed inside (not sure if it was professionally ported or someone did it at home) so I'm sure that helped over one out of the box.
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