Ok im new to this site but was just wondering if anybody knows off the top of there head if the rpm airgap intake will fit under the stock hood of my 91formula???

 

MIne fit under the hood of my stock 1990 IROC hood. The key is to use a drop base for an L88 Corvette. I found a reproduction online and it cost around $50. This base with a 3" aircleaner and lid left plenty of room. I can even fit a 1/2" spacer. With the 1/2" spacer, I had to use a bolt to hold the aircleaner on (not enough room for a stud and a wingnut). I am not sure how different the Formula hoods are as compared to the IROC hoods.

 

Ok I will have to look around I wanted to go with the k&n but haven't seen anything that will work what do you have for heads and carb?

 

I have an old set of AFR heads and a BG Demon Carb. I am 100% positive that a normal air cleaner (non-drop base) will not work.

 

The Spectre 9in round cleaner housing with the included 2in tall filter fits fine under a Camaro hood - no spacers/banjo bolts for carb linkage/choke/fuel fitting clearance, no cleaner housing bottom rubbing plug wires at distributor, $30 on the shelf at autozone, and filter is rechargeable like a K&N.

 

Ok think i found something that might work but got a few more things I bought a set of vortec heads and not really sure if I'm gonna have clearance problems there flat top pistons with 4 valve reliefs .40 over and what size carb to go with I really like the holley HP 750 but kinda worried that I will drop $500 on it and will be to much carb? Any thoughts?

 

what cam are you planning?

Personally I think the 750 is too big. I wouldnt go over 650.

 

Was thinking about going with comp cams xe274 but not really dead set on anything right now just wanna be able to make more power and get this thing to run up to 6500 rpm right now the nose drops at 4500 the heads that are on it are junk the motor came out of a 87 half ton just had it rebuilt never changed the heads that's why I bought the vortec heads I heard they flow pretty good

 

remember stock springs on vortec heads are obly good till about .470 lift. Id say a 350 with that cam and vortec heads a 650 should do fine

Oh and i ran an airgap intake and a Holley drop-base air cleaner and just barely cleared the hood of an 86 Z28

 

Yea I know I'm having the guides shaved down and getting diff springs 650 seem so small tho I had a buddy that put a 650 on his truck and it didn't perform worth a ****

 

proper tuning is key to any carb.

I only have a 600 on mine and it will really surprise you how good the car runs. My s10 only has a 650 and is pushing 435hp. You dont need big carbs if you get the ones you have setup correctly. A larger carb can sometimes produce a higher peak hp number, but you wont necessarily see it across the chart.

 

Ok is there anything I need to know when it comes to mechanical secondaries

 

that depends on what you already know and what you are wanting to know.

 

Lol don't really know much about carbs never touched a mechanical secondary carb the only carb I have ever touched is a q jet

 

Well said, it's all about throttle response and torque in real world situations that we spend 90% of our time!