Im building a set of custom siamesed runners from 4 3" U bends (aluminum). The problem is the radius isnt as tight as on the stock tubes. To mount them how i want to, I will need to raise the upper plenum an 1 or 1.5 inches. Will this clear my ram air hood? The engine isnt in my car yet as i am building it still and want to build it before i put it in. How much clearance is there between a stock hood and the top of the plenum. Does anyone think ill have a problem raising the plenum an inch? How much room do u think i can go up with my fiberglass Ram Air II hood? Thanks alot guys! - Ray

 

i have the ram air II hood on my 87 formula 350TPI and i believe it gives 2" extra clearance.... the hood is thicker than stock tho. but its a 2" cowl so that would be the diff. i could test it with sum puddy etc if u want over the stock TPI height... but ihave SLP runners and they are shorter than stock

 

Wow. Thats awesome. I would be infinitely greatful if u did. My whole engine build is revolving around this bit of info and id hate to do all this work and not be able to close my freshly painted hood. i hear the throttle body is the area thats the closest. Thanks again man!

 

yea i'll do that prob by the weekend. its hard for me with work and class. yea its the throttle body/front of plenum thats the highest point... but usually its the screw/ribbed rubber boot that connects the TB to the intake tube or MAF.... the stock TPI has a downward angle where the TB mounts. the HSR doesnt and thats the prob with that intake and usually why it doenst fit. since urs is still gone be a TPI im not sure wats gona happen. if u raise it the same all the way around then the TB wont be the highest point. with raising it an inch i kno you wont have a problem. goin 1.5-2" and u would need a measurement.

also depends on what engine mount bushings u use.... stockers are rubber but if u go poly its gona raise the motor 1/2" over stock.

 

Yea, im going to school, workin and wrenchin so i know what its like. Thanks again bud!