CarburetorsCarb discussion and questions. Upgrading a Third Gen carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.
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i will make maybe the swap from tpi to carb
i have a 350 with a T5 5 speed
the 350 comes out of a corvette c4 1988
i need any advice for the choise of the carb and intake
here are the modifications that i have done: crane cam Duration 264/270, Lift .438/.452, Speed pro Piston/Ring Kit, Forged, Flat, Heddman headers , clevite bearings and some other modifications
i can buy a edelbrock Torker ll from my uncle
is that worth to buy it or not?
i use the car for the street but want much if it can out of the engine
Thanks Dennis
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The Edelbrock Torker intakes are pretty horrible pieces to be honest. You lose the advantages of a dual-plane intake, and don't really get the high RPM benefits of a decent single-plane intake either. For the street, you will be much happier with a dual-plane.
Get a Edelbrock RPM Air Gap for your year model. Add a Holley 650 DP and you should be good to go. You will have to run a drop base air cleaner with the stock hood.
Air gap is a dual plane. There is also a weiand airstrike which is comparable too.As stated above a 650 is plenty for your motor. You need a double pumper for a manual trany car.
Just to make sure you got the right idea. There are 2 types of intakes,single or dual plane. Both types are made by most brands. Edelbrock intakes that I know of that are dual plane are performer,rpm airgap,theres more I just can't remember. Your best friend is ebay, you can find one pretty cheap depending what you get.
As far as carbs, you want a vacuum secondary. Go here,bunch of good info
Dual plane intake for sure. I had an Edelbrock RPM Air Gap, great intake! I ran it with and Edelbrock 600cfm Vac secondaries and it worked great. I would have taken a Mechanical secondary over a vac secondary but I got a smoking deal on that carb.
All carbs suck, they all create vacuum. haha
Seriously though, here is my opinion for what it's worth to the OP.
Edelbrock carbs, good mild performance carb, good gas mileage. A bit more difficult to change the primary jets, secondary metering rods/springs swap in less than a minute.
Holley carbs, Great performance carb, not as good mileage as edelbrocks, easy to change jets.
Demon's are a holley on steriods, Awesome performance, even less gas mileage.
On an essentially stock 350, there is no reason to pay huge money for a demon carburetor. Get a holley4150 series carburetor (this designates the mechanical secondaries) that is rated for 650 CFM (this is how "big" it is). That's what you'll be happiest with.
On an essentially stock 350, there is no reason to pay huge money for a demon carburetor. Get a holley4150 series carburetor (this designates the mechanical secondaries) that is rated for 650 CFM (this is how "big" it is). That's what you'll be happiest with.
okey but i don`t have realy a stock engine anymore
here are the specs
here are the modifications that i have done: crane cam Duration 264/270, Lift .438/.452, Speed pro Piston/Ring Kit Forged, Flat 0.30, Heddman headers ,Aluminum corvette heads , clevite bearings and some other modifications
On an essentially stock 350, there is no reason to pay huge money for a demon carburetor. Get a holley4150 series carburetor (this designates the mechanical secondaries) that is rated for 650 CFM (this is how "big" it is). That's what you'll be happiest with.
Yea with the cam specs and stock heads you don't want anything bigger than a 650 CFM carb. The Edlebrock RPM Air Gap flows better than the Torker in the RPM range you will be mostly in on the street. You can also find an Edlebrock Performer manifold pretty cheap which has a lower install height which clears the hood better and has a lower RPM power range. But you loose a little performance in the upper RPM's.
I have a 305 with a larger cam than you have (454,480) with a Holley Street Avenger 570 vacuum secondary, and an Eldebrock RPM Air Gap manifold. Best run is 14.72 with two other runs at 14.81 and 14.82. Biggest problem I have is my car is an automatic and I need a 2400 stall converter to match my cam also I have 2.73 gears and that doesn't help my 60' times.
i have ask my uncle which carb he will choose
and he said that he will go for a edelbrock carb
why? he said that the edelbrock is much eassier to work with than a holley carb!
and he said that i not go to race with the car and i don`t need it!
its for street use with good performance and for some show and shine!
and i must buy a adapter for match the holley carb on a edelbrock intake!
does anybody has a good reasson for not choosing the edelbrock or holley?
and is it true what my uncle said??
i will go for the best and work with the easy combination!
An Edelbrock rated for 650 CFM would be fine too, getting the correct size is more important in my opinion than the type of secondary.
Edelbrock's and Holley's both use a square-bore mounting pattern, no adapter is needed as long as the intake is for a square bore carburetor. If the intake is for a spread bore, you will need an adapter with either the edelbrock or holley
600-650 CFM carb is plenty for a 350. either way you go, edelbrock or holley you will be good to go. Carter AFB's are good carbs also, essentially they are edelbrocks with a different sticker.
. Get a holley4150 series carburetor (this designates the mechanical secondaries) ...
Actually, 4150 means it has metering blocks with replaceable main jets for both the primaries and secondaries. 4160 means it has a metering plate for the secondaries.
Only a true mechanical secondary type carb (Holley double pumper, Demon dual squirter) controls air flow directly with the throttle position. Edelbrocks have an "air valve", as do q-jets, that delay full air flow when the secondary throttle plate butterflies are opened. Meaning between shifts, when you let off the throttle (because speed shifting is death to T5's), there will be a delay when you stab the throttle again.
Vacuum secondary Holley/Demons are even worse, because secondary closing is delayed between shifts, meaning engine RPM spike.
There isn't a carb out there that you shouldn't expect to do something to, to get it to run correctly on your engine.
The typical Holley double pumper comes with a mechanical choke, so the first thing is to install an electric choke kit.
The jetting will probably be close, but to get it "right", you'll probably have to rejet it. A simple process. Check the Holley tuning sticky in the top section of this forum.
The Performer intake is for stock-like and mild performance upgrade engines. The Performer RPM is a higher power band intake for higher performance engines. With the cam you listed, the Performer would be fine.
The "air gap" version is not a necessity. I've never seen empirical evidence that it is better.
There is not a large difference between them, it's just a measure of how much air can flow through it (CFM = Cubic Feet per Minute).
A smaller rating will have greater velocity, which equals better torque and responsiveness.
A larger rating will allow greater horsepower potential at higher RPM's, at the expense of low-end torque and responsiveness, therefore you want the smallest carburetor that will not limit your maximum horsepower. Too large a carburetor will only hurt low-end performance without any other benefits.
Holley does not make a 600 cfm with mechanical secondaries however, you will want the 650. That's the best match for your engine
