C409

..... What intake set-up are you using on your C4 Power Plant ? ... Show pics please ..... My Gen 1 421 is currently using a fully ported Edelbrock Victor E with a 4bbl Accufab Throttle Body breathing thru a K&N 14" round filter with a filter top .....

rklessdriver

Super Victor 2 PN 2892 on my 436 GEN1 SBC. The little QFT 950 4150 pictured has been since swapped for an AED 1100 Dominator. I have to run a 5' cowl hood to clear this set up....





Edelbrock Super Victor PN 2925 on my old 383 Gen2 LT1. It has an ASM Mono Blade with a fabricated adapter to keep everything under the stock hood and hook up to the factory air filter assembly.






Will

bjankuski

This setup is very interesting, how do you like it? I have a 555 bbc with a similar setup but it s a drag car only. How do you like the street manors? I am building a 524 bbc for street use and want to use a similar setup and o expect it to work well.

My 406 has a modified holley stealth ram and I am interested in trying the single plane and throttle body option for more power?

C409

..... It doesn't see a lot of street duty but the self learning Holley ECU made the tuning easy , and the 4.33 gears help a ton with staying in the power band ! That said , I was out for a short cruise this evening and the 335-35-17 street tires were complaining .
The trickiest part was finding the combination of parts that would fit under the stock hood . The carb pad height is pretty low on the Edelbrock compared to other single plane intakes ... and the Accufab is only about 1 3/4" tall . Before I put this set-up on I was running the Accel Pro-Ram and modified stock plenum with an ASM mono-blade TB and didn't gain much in ET or MPH with the change . But this set-up was built for consistency as much as for power and so far its working out !
If you don't have hood clearance issues , you could use a better flowing base intake manifold like Will's . But as you well know , a lot of whats good for who depends on the build direction , combination of mods , and ultimately the goal .....
To help with streetability , the 1200cfm TB has progressive linkage ... secondaries start to open @ 50% TPS .....

..... Pictured below is the Accel Pro-Ram with modified stock plenum as run in the car .....

1985 Corvette

Some sweet setups. I like C409's because it fits under a stock C4 hood. I'm sure that's easy for a big cube stroker sbc setup though.

Tom400CFI

Have you seen this?


You might actually be able to pick up some power with carb hat or different filter option. FF to ~ 9:00 for the results...

rklessdriver

I also really like stuff that fits under the stock C4 hood.... but like C409 said, depends on the direction of the build....

Sometimes you got to do what you got to do..... That said, I HATE the fricken 5" cowl hood scoop on my 84. It's halfway to the top of the windshield and it's difficult to see when driving the car.

Will

383vett

Will, you’re complaining about seeing over a 5" hood. How do you see through your floorboard when you launch?

C409

..... LMFAO ... I just spit coffee all over the keyboard ! ... .....

frankinvett84

To the OP... Is that two alternators I see in your top pic??

C409

..... Busted ! ... Yessir , 2 alternators . The one in the original location recharges the OEM battery which powers everything car related including the fuel pump . The second alt recharges a small Odyssey AGM battery that powers the Holley ECU and all engine functions/sensors/coils etc. This was done to improve consistency at the dragstrip since some engine fueling and spark settings are impacted by available voltage . With this set-up , my voltage stays nearly the same (14.1-14.4 volts) throughout the drag race process and with it , the fuel injector pulse width and coil dwell times remain more constant .....

TravisSchoech

Has anyone found a pre-molded upper rad hose that will fit the C4 with a standard sbc intake? I see everyone running the flex hose or a coupler...

dclafleur

Has anyone found an out of the box elbow that clears the hood? I know Edelbrock vic e's are supposed to be super low profile but I've never had a chance to play with one.

rklessdriver

Accel use to cast one but it's no longer in production. TRACO used them on the GS80s.

You could use the cast low profile Edelbrock but will have to convert to a LSX throttle body.
Will

C409

..... While the Victor E Intake manifold has a low carb pad , the big drawback is that it also has a high thermostat housing bridge because of the air gap under it ... making it very difficult to plumb the upper radiator hose to anything but a remote thermo housing ... and our C4 Corvettes already face enough cooling challenges ... The Accel Pro Ram has a higher carb pad with a much lower thermostat bridge ... even so , its a tight fit fabbing a thermostat housing in under the throttle body but it can be done ! ..... Will's fabricated throttle body elbow is on an LT1 engine where the thermostat housing is on the water pump ... LSx TB's are diametrically large which again , will force some design creativity with the upper rad hose .....

C409

..... Very enlightening dyno test ... my favorite is the salad bowl ... lol ... in order for me to use anything other than what I am would require a hole in the hood and that ain't likely to happen .....

dclafleur

I didn't catch that was on a gen 2 I was trying to figure how that all wedged in there. It always seems to go back to HSR and Miniram for low profile options, that or ls swap.

blackozvet

to use an elbow and throttle body and keep it under the hood, especially with a raised thermostat housing bridge, it will have to be remote housing.

C409

..... Don't discount the TPIS Mini-Ram ... If I recall correctly , Jim Barth tpi 421 vette is still using one on his 450-ish cubic inch behemoth small block .....

C409

..... If you look closely at the water neck in my 1st post , you might recognize it as a TPI piece that was cut , sectioned to lower it , and repositioned on the flange to make it work on the Pro-Ram/plenum set-up ... I have experimented with a variety of intake manifolds over the years and the major parameter with ALL of them has been to fit under the stock hood without cutting into it anywhere ... that's the reason for the ugly rubber elbow on the passenger side valve cover breather ... take a look at the same breather on Will's LT1 and you'll see why my elbow is there .....