TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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does anybody know how good the edelbrock's version of tpi is? Will you get the sane results using a stock tpi thats been ported? here is the link for those who don't know what i am talking about. also is it worth the money or should i just stick with HSR? since it should be around the same price as HSR's
I'm using a ported Edelbrock baseplate and SLP runners. It's not a bad intake, but you'd probably be much happier staying with the HSR.
__________________ -Patrick GTA: Grand Turismo Americano (Grand Touring America) 1988 Pontiac Trans AM GTA...yeah...not stock anymore. 1 of 930 1988 Gunmetal Metallic GTAs produced (87U) See my CarDomain site:Code name: Vaderor myTGO vBGarage Built byZeus Performanceand tuned by Alvin atPCMforLess
I would say that with more power comes less fuel economy in town. Open road where you can cruise shouldn't be affected much. Most TPI cars, I believe, only got about 20 on the hwy and 14ish in town if that. Anyone have their factory window sticker?
__________________ -Patrick GTA: Grand Turismo Americano (Grand Touring America) 1988 Pontiac Trans AM GTA...yeah...not stock anymore. 1 of 930 1988 Gunmetal Metallic GTAs produced (87U) See my CarDomain site:Code name: Vaderor myTGO vBGarage Built byZeus Performanceand tuned by Alvin atPCMforLess
If you're switching to anything, do plenty of research. There are lots of little issues about fitmet, cost and performance that can pop up.
If I had done more reasearch, I would have gone TBI for my 1969 Z28 406CID engine swap instead of TPI - a whole different issue I know. I 'm using Lingenfelter/Accel base and SLP runners.
If I were to do another TPI for performance, I would go HSR or single plane intake EFI. Most aftermarket TPIs bases have the EGR if your state requires it for smog inspection. HSR does not. IIIRC HSR hits a hood reinforcement on the firebird? Are your heads and cam going to use all the HSR can provide?
you can pick up a FIRST TPI intake for $1000.00, and it comes with a TB, plenum, runners, base, and fuel rails. plus it will out flow that base and those runners right out of the box.
the down side with a FIRST, you will need a fuel pressure regulator, rework your fuel lines, and maybe have to mod the throttle cable.
i think they sell it without the tb and plenum becuase you're supposed to use your stock ones. yea i figured that out myself right after i last responded. thanks though.
Last edited by Floorman279; 05-17-2009 at 03:19 PM.
Reason: none
You can use the stock plentum with the edelbrock base and runners. The only porting I really had to do to my plentum was open it up for the dual 58mm throttle body.
__________________ 91 Z28, L98, GMPP heads, Edlebrock Base and Runners, edelbrock headers, UMI LCA's, Panhead bar. 91 Z28 & 86 Iroc Z - Soon to be picked up.
