TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Hello. I do not know where to put this thread so I hope that you guys can forgive me if it is the wrong section. I know that I do not have a third gen but I was told to come here for help from a guy on fullsizechevy.com. I have a 5.7L 350 in my 1999 GMC Sierra Classic and I recently got a TPI setup from a friend of mine to put on it. I would really appreciate it if you guys could tell me what all the parts that I need and where to find them. My friend said that all that I would need that isnt alread included is the lower intake manifold, the wiring harness, and the computer. I really appreciate your help.
Someone also said that I would need a high flow fuel pump. I know nothing about this swap and I really want to do this swap. I really appreciate any help. Thank you again.
If you have a 99, then you probably have the L31 Vortec heads. If so, the TPI will not bolt up. You'll need to buy special TPI to Vortec head intake in the 400.00 range.
I did weld up the tops of a stock TPI intake, reface it and use a 1205 felpro gasket, and do the swap once.
Well it is a 99 classic so it is the same 5.7L 350 vortec as the 88-98. I was told that I would need a new lower intake to go with the setup. I would appreciate it if any of you guys could tell me of any companies to check out for the parts or anything. Thank you for the input so far. I really appreciate the help.
Edelbrock, TPiS to name a few for the intake manifold. I like to go to the Summit website and use their search engine to find parts I need. It's sometimes hard to leave with only what I came for.
Thanks guys. I really appreciate the help. I am also looking at jimsperformance.com I emailed them last night and they sent me back a parts list of what they said I would need with their prices. They do not have the intake manifold and they told me to check scoggins and dickey and sdpc2000.com. I am really looking forward to trying this swap. Thank you again.
Just a thought, every vortex powered truck i have ever drove ran better than a stock tuned port. Dont get me wrong i love tuned port but seems kinda strange to go backwards?
Just a thought, every vortex powered truck i have ever drove ran better than a stock tuned port. Dont get me wrong i love tuned port but seems kinda strange to go backwards?
might want to learn how to pronounce that right....VORTEC!
My buddy had a 96 short box reg cab 4X4 5.7L Vortec..real punchy and ran up to 5500rpm.
Just a thought, every vortex powered truck i have ever drove ran better than a stock tuned port. Dont get me wrong i love tuned port but seems kinda strange to go backwards?
Its not a backwards swap, a TPI'd Vortec runs MUCH harder all across the RPM range than the stock CSFI setup does.
I dont think of it as a step back either. Supposedly the TPI swap will add another 30-50 HP to my vortec. I am not an expert by any means on this topic but that is just what I have been told through all my research.
