crazyjim

Topic says it all... Power/Cost ratio? What's the cost of each, what's the difference between the blow through carb setup and whatever else kind of setup on a carb?


This is for a turbo btw.

crazyjim

then I see things like this:





Now that's an EFI setup, but by who? Just fuel rails on a single plane manifold it LOOKS like. Is there a computer involved? ARGH!

327???

that looks like a BBC or ls1 manifold. and basically it just is injectors on a single plain with a throttle body. that one has an elbow and the tb would be mounted to it.

if your on a budget i would say go blowthrough, you can modify any holley DP yourself and use it.

crazyjim

cool, yea I am on a budget so carb would probably be my best bet

Now the question, how hard is it to do? Any links to walk throughs etc? Would it just be easier to take the $1,000 plunge and get a CSU carb and bonnet?

BDR

yes its easier to plunge $1000 on a CSU carb. Give them specs, they'll tell you what you need and and they'll adjust it for you. I bought my carb direct from them.

crazyjim

That's pretty much what I figured, I haven't read ANYTHING bad about them from turbomustangs or anywhere on here. So the $1,000 CSU carb is still cheaper than the EFI setup? Which makes better power? Fuel rails on a single plain manifold still require a computer don't they? I'm trying to stay away from EFI but I'm just not sure.


And the last question is CSU handles the problem with mixtures at different boost levels right? I know you still have to run an external FPR but I don't want to be idling puking out raw fuel and then be running lean at 16 psi


Thanks dude

327???

actually there is a link to a DIY blowthrough carb modfication on turbo mustangs. there are a couple guys running pretty good on there own setups. i'll try to find the link. i'm just the type of guy that has a hard time spending 1000 on a carb i could setup myself for a fraction of that, even if it is a bit of a hassle.

Edit: here you go
Blowthrough Carb How-To
if you do build your own carb just remeber that you still have to tune it.

Drac0nic

By the time you spend $1K on a carb you may as well just buy an Megasquirt unit IMHO. if you go carb mod the carb yourself, there's no use eating the savings up going carb. Take the advice to go to turbomustangs, they know their stuff and even have a GM section. The info you want should be a sticky in the carb section. I had a megasquirt running on my 4.3L V6 TBI with under $500 into it, that was with an LC-1 wide band btw.

My notion if going megasquirt is throw a set of Ford Motorsports 42# injectors on a TPI intake and a modified stock HEI system and run it. While it will cost you some power I wouldn't be afraid for a moment to run a TPI intake on a turbo motor. If you have access to a TIG and a milling machine, you could modify most any carb intake to EFI like they've done; that's fairly common for EFI setups to use a single plane intake.

With a pair of Ford Motorsports injectors and a pair of external Walbro 255lph pumps with a new feed line and using your old feed as the return it should be good for about 600fwhp with the injectors holding you back. The reason I say to use the FMS 42s is that they come up every so often super cheap on ebay or the various message boards; I've seen em for about 180 shipped before, quite a steal at the price IMHO.