Technite73

I am having carburetor issues with a number of Holley's that I have.

Was thinking of trying one of the 600 cfm Summit Racing M2008 series carburetors in my 66 327/300.

I am looking for feedback from anyone who may have tried this on a C2.

Any issues with hood clearance, jetting?

Thanks

Tooth Doctor

Here's a previous thread: https://www.corvetteforum.com/forums...or-review.html

Technite73

Thanks Doc, I saw that review and it looks positive but I am interested in seeing if anyone here on the C2 forum has installed one in a small-block with a stock hood and seeing if the stock drop down air filter housing has any clearance issues.

Nowhere Man

A proper rebuild of what you have would be a better option instead of Micky mousing that to work

MelWff

looking at your other posts you had a flooding problem after changing the fuel pump and you were told to check the fuel pump pressure. Did you check the pressure? Did you consider when you changed the pump you may have caused some dirt to flow up into the carburetor and it is lodged in the needle and seat assembly assuming you dont have an inlet filter?

Technite73

I did check fuel pressure and it was at 5 normal and we also opened the sight plugs and had no fuel shooting out. We set floats low on purpose.

I have rebuilt my Holley myself and also lastly by a professional mechanic all with the same result. Excessive flooding raw gas going into the manifold causing cylinder wall wash and excessive exhaust smoke.

I borrowed a Edelbrock performer carburetor from a buddy and the engine is running normally but I do not like the Edelbrock for my application.

I also drained my fuel tank and put in fresh gas.

I am running a GF90 fuel filter.

Nowhere Man

A your carb a original one? Or just a generic replacement Holley

MelWff

what number power valve are you using and what is your idle vacuum reading?

Technite73

It is a generic Holley #80457S 600 CFM with electric choke. Had great success with it for 8 years. It ran much better than my rebuilt 3367.

Technite73

I am using the power valve that came in the Holley factory rebuild kit. It is the same one that was in the carburetor before the trouble started.
I do not recall the idle vacuum reading .

Technite73

I used Holley Trickit 37-119.

power valve is 6.5


QUOTE=Technite73;1592107999]I am using the power valve that came in the Holley factory rebuild kit. It is the same one that was in the carburetor before the trouble started.
I do not recall the idle vacuum reading .[/QUOTE]

larrywalk

I have one on my '65 now - it's a Holley R84010 that I bought new over 20 years ago for my '57 Chevy. It looks just like what you've linked except for the fuel line attachment to the body of the carb. It's a 600 cfm vac secondary. A bit of history, when I sold my 57 Chevy about 20 years ago, I took this carb off and stored it.

About 5 years ago, I rebuilt a nice 650 Holley double pumper (4777), but it was not the greatest for street use. Accordingly, I dusted off this old R84010 aluminum bodied Holley 600 vac secondary 2 years ago and noted that I had marked that I had installed primary jets 2 sizes leaner (#65s); and uses a 65 power valve. I bolted it on my L76 327 and it ran perfectly! Currently, I'm using it on a 358 SBC with a solid street roller cam and it's awesomely good. I was amazed that I didn't even have to update the gaskets, and I like the fact that one can change the jets without spilling fuel. Also, the annular boosters appear to have better mixture distribution than the old style double pumper with the dog-leg boosters.


Of note: the throttle bores on the underside of this carb are 1 11/16". If you have an intake manifold like the L76 high rise, the throttle bores in that manifold are only 1 9/16", so it won't fit unless you radius the manifold bores a bit larger, or use a 1/4" thick spacer.

C2 Hot Cam Guy

I had one in my c2 .I jetted it to a 67 jet worked great . no clearance issue. Ran great low speed & high

Technite73

Thank you. Exactly what I was looking for.