how good is the holley tbi unit. is it beter than doing the tbi mods or the 454 tbi. the cash is not a issue i know nothing about burning chips and there is no one around me that i know of that can burn me a chip i just want my tbi 350 in my K2500 to spin to 5 -5.5 k with a good cam and intake. thanks guys

 

In response to your first question - yes, the holley is a great unit as far as i'm concerned. It flows more than enough for a mild 350 and as i've experienced, can support one up to at least 5,000 rpm (and thats with the stock ignition). If you're going with cam/intake swap, i'd do the springs at the same time. 5,500 is a lot of rpm for an otherwise stock motor (especially the bottom end). When you start spinning a sbc that fast, balancing and valve float becomes an issue. I'd never want to take a stock crank over 6,000 rpm personally. That's just me.

TP

 

the motor or that is going in the truck is a 1989 350 4 bolt main out of a one ton truck it will have a set of iron eagle heads (180 cc intakes ports) a comp cam pure nrg cam and the rotating assembly is balanced with a st of KB pistons.

 

then it sounds like you're dialed

 

There was some talk some time ago that the injectors on the Holley were poor - but I also recall someone saying that they may now supply better (GM OEM) injectors. Is this correct?

 

yes the old ones where no good for higher fule pressur since then they went to the gm type so every thing is all better now

 

I know a guy with one in a van with a 383. He said it was a huge performance gain and well worth it. You can get them with 3 different injector sizes 55, 62, 85 lb/hr. you have to run an adapter unless you buy or make a 2" bore intake. Have you run it yet, I have a 93'Burban with a vortec 350, I want to run one just looking for feedback.