Just finished my 383 HSR build and wanted to point out a piece of information I've learned.

I just did a zero decked block 383 with my old HSR but with holley's 58mm TB. I added energy suspension poly bushings in the engine mounts... no other changes. Last time on my L98 with standard deck of 9.025 and stock old mounts, i had to cut just a tiny piece of bracing out to clear but it cleared and shut well.

Hood does not come near shutting now. SO i cut out all the bracing around the front of the plenum and throttlebody. I used clay to tell me what was goin on under the hood. I found all the spots it was hitting and cut that bracing out.

It will close, but only when you force it down. its hitting the TB/front plenum ribs. It bulges the hood up 1/2 inch or so. Basically it looks like crap when you FORCE it all the way shut so now i'm gonna get a new hood. no big deal, always wanted one and its much lighter than stock

BUT, this time i used felpro intake gaskets which raised the manifold up a tiny bit...probly .100 inch or so, judging by the thickness of the manifold gasket and the gap it left on the china walls. I have a oil leak now out the back wall, so i'm going back to the RIGHT STUFF gasket maker i used last time with great success, so MAYBE that i will eat up alittle clearance but i doubt its gonna be that much.

The car is a 89 camaro irocz, with factory Irocz hood. Beware of poly mounts and HSR on stock hood cars. Doesnt always clear camaros

 

Thanks Orr. Probably a worse condition on Firebirds.

 

Thanks for the info

 

I used poly mounts on mine as well, hood wasn't shutting that well with aftermarket summit radiator (it was taller and made the snorkel sit higher and hit the hood) so I put washers around the hood-hinge bolts and made a temporary fix. Didn't try cutting the bracing, but I figure it wouldn't completely solve the problem, either.

 

There is a big chevy/camaro show this weekend at carlisle pa. I will be going and looking for hoods

 

This is the first Ive heard of fitment issues on a Camaro. Ive heard of them on T/As, but Ive always heard that theres little or no problems with Camaro hoods. Good to know though. I just put in poly mounts, and Im about ready to bolt up the stock hood Im like you though, Ive been wanting to get me a Jongbloed, so all may not be lost

 

Wow, as soon as I saw this thread it was a flash back. I remember reading about the HSR fit issues when it first came out, it only barely fits under stock camaro hoods, and never with poly mounts. As for firebirds I was lucky enough to get it to fit on mine, but I think that was do to worn out engine mounts.

At this point I thought it was fairly common knowledge.

 

i thought it was a myth that poly mounts raised the engine

 

Might be time for a Proflow intake

http://www.edelbrock.com/automotive_...xt_chevy.shtml

 

thats an option for me, i may try that out...but then again, i kinda like my stealth ram and think a hood is a good bet mainly for weight reduction

 

I always thought the hood not fitting after a motor swap was a good problem to have.

 

thats pretty schweet, first time Ive seen that. Looks like it takes an LS1 TB, but everything else is for genI SBC

 

Have ya heard the one about ....."if it has **** or wheels" you're going to have trouble with it?
Add Edelcrock to that!

 

Yeah aparently you can just order up the intake itself and fuel lines and from what I read on here you can rewire a LS1 throttlebody to work with our computers. The only shitty part is the intake is setup for pre 87 blocks but they do have one for vortec style heads.

 

i'll have to get a pic of my hood bracing mods and my hood shut. it does shut but its resting hard on the TB/air intake boot clamp boot and i do believe it touched the plenum rib

 

Do you think the ASCD SS hood would clear everything with the poly mounts? I've seen a few pics and it looks as if the underside has a lot more room underneath where the bracing is at on our stock hoods.

 

i may find out i'm deciding on the SS hood or 2-2.5" cowl from up22 or glasstek

from the many pics of the SS hoods, i feel it will clear my problem areas with no trouble. I know the little cowl will definately help

 

Here are the only pics I've found of the underside.

 

My friend ran into that problem today, poly mounts, HSR, and a big TB.

Also, poly probably doesn't raise the motor, it most likely puts it back into the stock location. the rubber ones wear out over time and the motor sags down.

I've got probably 2 to 3" of clearance under my RA1 hood.

 

well i've driven the car around alittle and i'm not sure if the heat cycling helps or not, but i think the motor has snuggled down into the bay alittle bit as the hood 'APPEARS' to have gained abit of clearance. It shuts like before, but doesnt appear to be resting as much on the TB and such underneath.

I havent checked it all with clay, but it appears to be shutting better and not buldging in the middle like it did before

 

I went ahead and ordered the SS hood from Hawks last thursday. I'll have some clearance measurements once I get it on the car.

 

I know the Jongbloed hood (now they changed the name to the Sunoco hood ) was made for carb'd cars, but I wonder if anyone has put one on a HSR car? Im debating between the SS and Jongbloed, so if anyone's got the Jongbloed please take some measurements for me, or elaborate on any fitment issues

 

i beleive the clearance issue i have is only .25 inch or so..if that now. i believe most any cowl will be more than enough to fit HSR and poly mounts

The ss hood i havent seen in person, but from the many pics of it, and judging where the hood starts to rise up an inch or so, i believe it will clear the HSR/TB area just fine

I did not find any hoods for sale at the GM nationals so i'm gonna hold off on the hood for now since the stock one is fitting better..its not off by much.

i wish someone made a fiberglass iroc hood. I love this darn hood! even one with 1inch rise, sorta like the daytona/turbo hood i think it is, but without the goofy looking side slots and not quite as high

 

[thread hijack]
Never heard of that before. Does it use all GM sensors like the SR? Says 90mm TB. Is that an LS1 style? Proprietary fuel rails or stock or what? Interesting...