I am in the process of putting an Edelbrock Victor "E" on my -90 C4 Corvette.
I have stumbled into issues how to make this work without cutting a big hole in the hood. The idea was to use an Edelbrock low profile elbow and a LS TB and mount it sideways (to minimize plumbing between the blower and the intake), like this:

Did not work out very well; the bottom of the elbow hits the fuel rail.

I´m now playing with the idea of mounting the TB directly on top of the intake. This will save me some headaches but mighht create some new on the way...

Anyone tried this? My main concern is that there could be huge air distribution problems at part throttle (the throttle blade is 92 mm so its pretty big). Another challenge is to find a carb hat that won´t limit air flow (too much).

Since I already got the TB I would prefer to use it but getting a low profile 4bbl TB (like the Accufab) might be the only (and expensive) way forward?

I´m today at 530 rwhp with my old Superram intake.

Thanks

 

I thought carb hats are 5.125 inch???

Consider another single plane that is shorter? Can any SP be milled for clearance? My weiand accelerator was milled but would need to be drilled and bung'd for injectors as would other efi sp. Holley efi SP might be shorter and I recall might have more meat on top to be milled...

 

Guy i bought my 92mm tb off of did that very thing! Drilled holes and bolted it right to intake

Said he experienced no issues. I am curious how it worked as its a very cool idea. Part throttle should be fine as its low airspeed, and plenum is fairly spacious

 

Accellerator is prob the shortest SP available. I think it comes in two versions one short. I bet used on older vettes years back.

Mine was shaved maybe .375 or .500. Then a plenum was added to it to allow two TB's. It cleared the 84 Vette hood my .375 inch and used stock air cleaner.

 

Did no forward facing elbow work? Guys can get these intakes under 4th gens with the windshield cowl bein in the way, do any of the ultra low pro elbows work? Will suffer a slight flow loss on tight bend but blower makes up for some of it

 

the elbow will collide with the thermostat housing if facing forward.
Since the blower outlet is curved and facing towards the firewall it also feels logical to point the elbow towards the driver side.
I might have found a solution though: everything fits with the exception of the elbow-fuel rail collision. If replacing the middle section of the driver side fuelrail with a curved piece of pipe it will be possible to make everything fit.

 

Or recess the elbow? Cut a groove and patch in new metal?

Do you have any room to go higher with a custom carb spacer? 1/4-1/2"?

 

Cutting a groove combined with a spacer might work. I will check this when I' m back home in Sweden on Saturday ( in the US for some work this week)

 

What's wrong with the way I did it:

http://members.cisdi.com/~anesthes/s...-ls1/complete/

-- Joe

 

This one stands 5.5 inch and allows plenty of room to mill the top...

http://www.holley.com/9901-101-1.asp

4.06 inches high but you need to drill and weld bungs

http://www.holley.com/7547-1.asp

 

That is the one I used in the post above yours. That combo works fine in a C4. with a blower and curved discharge. the only suck is the blower mounted that way sucks all the hot air in from the header.

-- Joe

 

http://www.carcraft.com/techarticles...t/viewall.html

Note weiand team G sits pretty short and has respectible #'s and price as well.

1.0 inch shorter than Vic JR and same HP/TQ.

BUT you need to weld in bungs

 

Back home again.

Did some measuring and the spacer+groove does not seems like a feasable way forward. Its going to be a major cut in the elbow and I think it will lead to serious flow restrictions.

Thanks for all ideas and tips, TGO is really the place to get constructive suggestions and good advices from people with alot of experience

Right now it looks like I will stick to my Victor E but skip the Edelbrock elbow, I will probably have to cut it up and weld so much it does not make any sense not doing this right from the beginning.

I will do it the same way as Joe (Anesthes)-fabricating a custom aluminum sheet metal elbow. Its about 5,5 inch from the intake manifold pad to the hood but less at the rails so I will probably make a tapered design that is slightly tilted downward (did that make any sense...?). I will take some pics along the way and post.

 

Why not go with a FAST 4150 4bbl Throttle body with a low profile Extreme Velocity Carb hat? the FAST I think is 2" tall IIRC. Its been around 5 years since I sold mine.

Jay

 

Mainly cost reasons.

The FAST Tb and EV will total more than $700, my ls tb cost around $100 and I think I can have the sheet metal elbow done here for around $100.

 

Hi Bogo

Fun to see you still working on your vette the change you dod to the in exhaust worked very well! Curious, why change the SR intake?

/N.

 

Never give up...



The lower curve is for the old exhaust and changing it to a more free flowing got rid of one bottle neck. The output now (upper curve is with the new exhaust) flat lines from 5000 rpms. The intake flows quite alot less than my heads so it feels logical as a next step (to change intake).