iight heres the deal i mentioned a couple months ago i was doing a 350 tpi swap and yea i did and its got alot more power than my 305, but i notice there is alot of loss in top end power wen it comes to this tpi, i was wondering if converting back to a carb would improve in any top end or will it just be a bad idea all together,

i was thinking about an edelbrock multi-carb intake manifold, if i go with the carbs would it be better to get an edelbrock carb or stick with the q-jets.

so much trouble into swapping the 350 in and im disapointed with the outcome....

 

can any one help me out??

 

What are u running for the TPI intake? Is it stock in other words? What size injectors? What are the other mods? You didnt get enough info to go on but ill say a few words on the topic. TPI is great until about 5-5500rpms then it really doesnt make any more power. This is aftermarket TPI that im talking about as well not stock runners and base. If you go carbed you will have to run two regulators to pull the fuel pressure down progressivly. You will probably gain a bit more top end but it will be a trade off on low end a bit if you ask me. TPI shines in making a boatload of torque but not much hp. Just one of the downfalls of it. I personally would rather have tons of torque than tons of hp.

 

This doesn't make any sense. I think you meant to say that stock TPI runs out of breath at about 4,800 RPMs. Aftermarket TPI intakes such as the FIRST, Holley Stealth Ram, Accel Super Ram, and the TPIS Mini-Ram, are capable of much more than even the most heavily ported / siamesed runner setups can provide.

 

Stock TPI hardware goes flat at about 4800 RPMs. It will rev higher, but power won't increase.

A Holley Stealth Ram, including the required parts to support it, would out-power, out-drive, and cost less than a dual-carb (yuck!) conversion.

 

I was referring to stock as in from the factory and aftermarket as in edelbrock runners, as&m runners and a different base but still the same basic look. The others you mentioned are still sorta TPI but completely different in the style. They are no longer long tube runner setups.

 

its a stock tpi out of an iroc, whats the best brand you recommend for a new tpi, holley stealth? or are there better ones.

and i take it nobody here likes the dual carb idea lol

 

wow i just looked at holley stealth ram, and its extremely pricey lol guess ill have to save up a couple paychecks lol

 

The Stealth Ram isn't that expensive once you've seen the TPIS Mini-Ram.

 

yea i looked at that one too lol its like twice as much, this isnt a very cheap hobby i tell you that much lol.

once i replace the stock tpi, i could bolt it up to my old 305 with no problems right?

 

Are you looking at the manifold only, or the full EFI set-up?

The manifold only doesn't cost any more than an aftermarket TPI base. You'll need other parts to complete it, but all together it's going to cost less than putting dual carbs on (not sure why you would even consider dual carbs - expensive, troublesome, and less power than a properly chosen single carb).

 

i was looking for the whole set up to gain as much power as possible, but single carb set up is better than multi carb? how so?

 

Dual carbs were used back when the "big" carbs would flow about 350 CFM. Intake technology has progressed by leaps and bounds on single 4-bbl versions since, while dual carb versions are limited by lack of real estate and their main appeal being the drive-in crowd that is impressed by looks but clueless about real-world performance. Show me a successful dual carb racing combo and I'll show you a tunnel ram that is completely inappropriate for street use.

You don't need the full EFI set-up to get the most out of the Stealth Ram. They made that as an EFI conversion, not an EFI upgrade. The intake itself is the EFI upgrade - you don't need the rest of their aftermarket EFI stuff.

 

you sound very knowledgeable of this subject so let me ask you do prefer a carb or fuel injection

 

Exactly. Most forum members running the Stealth Ram are just using the intake. You use the same injectors and wiring that came with your existing TPI setup. I don't know much about carburetors so I'll defer to your expertise there.

 

Nope.....dirt bikes are a lot cheaper tho!!!

 

Work with the system you have unless you have a compelling reason to do otherwise.

 

yea i guess your right, dont fix it unless its broke as they always say lol, so basicaly i can save a couple dollars by just replaceing what limits my car which would be the intake everything else is savable