I agree. I really like a Accusump 1 gal for drag race motors, nothing wrong with priming the system before hand. Plus the other issue for you is the smaller cam bearings to start with. A SBC 1.968" isin't very big, but a 55mm LS1 journal is a different beast.

Bret

 

Yep and the 50MM rollers are a beast also.
Could have gone with the BB ACL bearings but didn't know about the longevity of those either on the street. Trailer queen they would have been OK.

 

grammerman

I say that if you have the time and abillity go ahead and build one. It shouldn't be too hard. I'm assuming that you are building a plenum in the center with each runner running over the top of it and pulling air in from the oppisite side like the ls1 style intakes do. If you search I think you will be able to find some calculations to help you select the propper runner length size and plenum volume. Good luck and post back up if you build it.

 

I've been meaning to start on designing an F1 style intake manifold for a long time, just haven't got around to doing it. Besides, my welding skills are a little too limited for something like that. I think that's kind of the opposite of what you want, they tend to be very short runners, but maybe you could make a taller one?

Just an idea,

Jeremy

 

Well really something like this is needed, make your runner lenght whatever you want.





David

 

David,

What program was that drawing done with? I really need a some good 3-D modeling software. AutoCad just doesn't cut it anymore.

Thanks,
Jeremy

 

it looks like autocad 2006.

 

Not bad... but it'll be hard to stay symetrical (if that's your goal) with the SBC/LT1 port placement.

Nice to see the plenum volume is about TWICE that of a stock LT1. If you think the LT1 outside looks small, check out the salami-sized plenum some time...


I've seen two or three custom plenums on modified LT1 intakes here, and one in person at Speed Secrets. The longer runners would be very cool though... as would a phenolic spacer at the manifold gasket surface and under the intake, and maybe a direct injection design that ports the N20 and gas from the EGR and into the IAC circuit.


Just thinking out loud....

 

That pic was copied off of Wilson Manifold's website it is for an LS1.


David

 

Have you had any experience with it? I'm thinking about going with SolidWorks, not sure yet. I'd love to design a new intake manifold for my LT1, maybe I could get Bret to build it for me. As i've said before, my welding skills are limited.

Jeremy

 

I'm a fan of solid edge myself, just run through a few of the tutorials and you're on your way. Its pretty easy to pick up if you have any previous 2d cad experience.

 

If you happen to have $2600 laying around I know Hogan make a sheet metal LT1 intake. I've seen it in person and its awsome!!!

 

Nice Hogan Intake! but what are the numbers on it compared to a stock LT1 intake. My stock intake seems to start to show it limitations at about 5500and gets worse as RPM climbs to 6800. My MAP goes from about 100KPA at 4500 RPM to 94KPA at 6800. I have no issues with my CAI (its 4" all the way with no MAF, w/big K&N filter) . It's gotta be an intake manifold issue. This is on a weenie little 355, I would think more cubes would be more problems. I sure would like to test one of those Hogans back to back on the dyno. Think they would lend me one?

Steve

 

What throttle body are you running? I had the same issue when running a 52mm on my 383 turning similar RPM. The issue was cured by the AS&M monoblade where my MAP stayed at 99-100kpa until the limiter at 7000.

 

Isn't that intake pictured in the car on the first page a modified gm ram jet 350 intake?