I'm wondering what the best, most affordable kit would be. I know holley is best but I don't have $2k+ to spend on their master kits. I remember hearing FiTech is alright but was wondering if there's something better.

 

A junkyard 89 L03.

 

I was hoping to stick with a 4bbl set up, so definitely aftermarket.

 

The best TBI system is made by a company called Rochester Products.

The best version they made of it came in Heavy Duty 1-ton 1996 Chevy & GMC vans with the 5.7L L05 TBI Vortech engine. It sat on top of a 1996 5.7L L31 Vortec long block engine.

The absolute biggest piece of sh*t TBI system ever made is by a company called Holley. Holley still makes and sells this hunk of sh*t today. It goes by the name Holley Sniper EFI.

 

I haven't used fitech tbi specifically. I am using their stand alone on port injection and while it's not the most comprehensive, it's pretty user friendly for your average enthusiast. Someone who likes to be able to change every aspect, probably not their cup of tea. Quality of the wiring, handheld and the few sensors I got seems fairly good. I can't speak for the hard parts like tb or injectors.

 

Correction:

'96^ was MPFI.

 

GM was sneaky, sneaky and made a 1996 only version of the Rochester Products 220 TBI system only for HD Chevy and GMC vans.

It was a 1996 Vortec L31 long block engine with TBI. The RPO code was still L05 for this TBI/Vortec hybrid engine. It had a special Vortec pattern TBI intake manifold, Vortec cylinder heads, and a roller tappet camshaft.

Ask Mr. A-team van guy about it. I'm sure he knows of it. @Fast355

TBI is 1987 to 1995 plus this one oddball 1996 TBI Vortec HD Van engine.

NOTE: I'm only counting US market engines. Not export market engines. GM did a lot of oddball export stuff.

Compnine Build Sheet for a 1996 HD 1-ton Van with the L05/4L80-E hybrid 5.7L TBI/Vortec engine.

 

I got you. That is interesting trivia...but how would that be better than a 2" bore, 454 TBI assy?

 

It's not.

But you only need the 2.0" bore TBI TB if the engine needs it. It's like dual 58MM 1000 CFM TPI throttle bodies. There isn't a naturally aspirated TPI SBC engine that's ever been built that needs a 1000 CFM throttle body. OK maybe there is some idiot out there that has built a 454 SBC stroker motor that thought putting a TPI induction system on it would be cool that could use a 1000 CFM TB.

Mainly I'm just effing with dude because he has asked forty eleven times what is the best this or that. He has a 1984 LG4 so wore out the pistons are swapping holes and gaining a stroke.

He has a running and driving parts donor 1994 Surburban or Yukon with a 5.7L L05 TBI engine, a 4L60-E transmission, with an advanced powertrain control module and the wiring harness. He needs to buy a junk TBI F-body and convert his 1984 Camaro to a later TBI spec car then swap the much more advanced 1994+ TBI GMT400 powertrain into it. The F-body TBI engine control module is dumber than a box of rocks compared to the 1994+ GMT400 powertrain control module.

He likes to drive his car. Daily it. He's not building a race car. GM has spent billions of dollars developing the electronics and sensors and TBI is damn near bulletproof. It's not going to die on the side of the road like a Holley because you drove by a neon sign and some stray EMI/RFI made the computer sh*t its pants.

OMG where would one ever find parts for a GMT400 truck if you got broke down somewhere and who could possibly work on a GMT400 TBI truck?

I mean everyone has Holley parts and knowledge. You can just trip on Holley parts laying on the side of the road and every inbred trailer park trash r*edneck knows how to work on aftermarket EFI systems. It takes rocket surgeons to work on a GM TBI system.