soulavenger

HEY guy and gals:
I'm new to this forum i have a 93 5.7 suburban 2500 like most of you
it given me afew great years....The suburan has 174000 mile and is running fair to good,but i'm looking to kick it up a noch..
All i want to do is swap the intake manifold with the same year
camaro,corvette,impala. To wake up some of the pony that have been sleeping and run better on the highway. I have a family of 8 that includes the wife and me...thats 2boy 4girls and we love to travel...
ANYway the truck sees alot of highway. HAS anyone done this swap,
what intake did you use,can i use the stock computer or do i have to buy another,do i have to change to stock fuel pump.what if anything else should i get to make the swap easy....ok i said a mouth full
please help me with this small project.
oohh yeah i have a small budget...the kid have to eat

AKWE-gt

so you want to turn your tbi into a lt1 or do you want to take the intake off a tbi camaro? if you want a lt1 then your looking a new fuel pump and ecm to name few parts. but i don't think kicking, a engine with 174000 miles, up a notch is worth the risk. usually engines, with this much miles, don't like last too long after they get modded or it could just be me and my lead foot . i don't know if the camaro intake would make a diff. i would stick with the intake from the suburban, because with a heavier vehicle you looking for more torque and that's what the burban intake is design for. i took my heads and intake into the machine shop and had them freshened up. this worked pretty good felt like a new engine. just a thought.

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soulavenger

thanks,AKWE-gt...thats a good idea..get the heads and intake done.I'm not looking to turn this motor into a LT1, I wanted to know if swapping the two intake would make a differents.The TBI compaired to the TPI...did that help...

AKWE-gt

the same goes for the tpi as the lt1, new fuel pump, ecm, etc... the tbi intake is like a old one piece carborated intake, while the tpi and lt1 intake sytem have a lower intake, runners and a plenum. the swap can be kind of a pain in the ass if your not comfortable with all the sensor and ecm swapping, but there are books and kits for it.

here's a site with intake swap your looking for. seen it done Trucking mag and the results were impressive on the dyno.
http://store.summitracing.com/defaul...25239&x=16&y=9

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4onFloor

if you get a tpi set up from a 90-92 camaro you dont need to change the ecm. just string the 2 injector harness into an 8 injector harness. run the injectors in parallel(same thing as edelbrock's multi port kit) because tpi is not sequential. but you would need a new fuel pump with an output of atleast 45psi. but seeing as how you have a suburban, i'd stick with the tbi, it's better for low end torque. type in a search on ebay for a 454 throttle body. there's guys that sell rebuilt throttle body's with the bores milled to 50mm and custom throttel plates. that would wake up your 350 a little bit.