fast 90/90 or vic jr intake? how much increase will i see?
#1
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fast 90/90 or vic jr intake? how much increase will i see?
402, afr 205's, 230/240 591/608, d1sc, 4.63 pulley with a ls6. right now im at 696 at the wheels just wondering what would be better to go with the fast 90/90 or vic jr? anyone done the switch? oh and this is a 100% STREET CAR!!!!!
Last edited by 4SFEDZ; 05-31-2009 at 02:46 PM.
#2
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I should have some numbers with my combo in a few months. I wouldn't necessarly run the fast past 20psi but never planned to.I like it to run direct port as nitrous works great with FI.
I did some extra stuff on my fast. A bit of extra rtv where the shells go to that gasket and also loctited my shell bolts and nuts.
I moved my map off the fast I drilled and tapped the fast and use that as big vacuum feed. So far so good but have not put high boost thru it. Don't seem to have any trouble with 8psi or so . Also installed nitrous burst panels for extra safety.
I think the fast is more streetable and bet gives wider powerband. Also if you run a bit richer heard no problem with distribution and lean cylinders. ..the quoted number is 10.8 to 11.2 I believe. I am running 11 to 1 right now.
I did some extra stuff on my fast. A bit of extra rtv where the shells go to that gasket and also loctited my shell bolts and nuts.
I moved my map off the fast I drilled and tapped the fast and use that as big vacuum feed. So far so good but have not put high boost thru it. Don't seem to have any trouble with 8psi or so . Also installed nitrous burst panels for extra safety.
I think the fast is more streetable and bet gives wider powerband. Also if you run a bit richer heard no problem with distribution and lean cylinders. ..the quoted number is 10.8 to 11.2 I believe. I am running 11 to 1 right now.
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#9
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I'm running the fast now,..planning on soon going to POSSIBLY a different manifold myself, on the vette. I picked up a vic jr from a friend with an elbow already on it. Have not tried to put it on the car to see but, the hood WILL need to be changed.
I'm debating about usingthe carb manifold myself, but,....i'm not sure which route to go yet as well. It would be nice to get some good feedback inthe thread.
I'm debating about usingthe carb manifold myself, but,....i'm not sure which route to go yet as well. It would be nice to get some good feedback inthe thread.
#12
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I reckon I lost power switching from the LS6 and stock TB to a Carb intake/elbow and 85mm TB.
Mid range did improve slightly though.
Having to remove fuel on my tune to maintain AFR's is not a good sign of improved airflow, and trap speeds did appear to suffer a little too.
Mid range did improve slightly though.
Having to remove fuel on my tune to maintain AFR's is not a good sign of improved airflow, and trap speeds did appear to suffer a little too.