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Old 09-11-2005, 08:50 PM
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TPI hot rod questions

I was wondering what different people that have used TPI or researched it extensively think about modifying engines that use it. What I'm trying to ask is, would TPI be okay to use for hot rods in general since a chip needs to be made for (from what I understand) most any cam profile other than stock. Also, is TPI forced induction friendly (centrifugal supercharger/turbo)? If the stock ECU cannot handle positive manifold pressure, would using something like a FAST ECU setup with the TPI fuel system work? I'm just kicking around some ideas for a turbo setup on a 350 Chevy. I like the way the TPI setup looks, I believe the runner setup would allow for an additional "intercooler affect" even if no real intercooler is used.
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Old 09-11-2005, 10:20 PM
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TPI's are great for hot rod use. Keep in mind that there is plenty of work to be done though, depending on your finals goals for the system.

The stock TPI manifolds were desgined for 305 cubic inches of displacement so you might look into some aftermarket runners and manifolds, or something more like a Superram or Miniram. This is especially true if you plan on running a forced induction setup.

For most any major modification a new (truly custom) chip would be beneficial.

You can use a stock ECM for boosted applications however it would require a number of mods. I am not sure what options you have as far as a MAF system goes. I know the stock MAF sensors only reads up to 240 grams per second of flow.

A stock MAP sensor for a TPI will not read over stock atmospheric pressure. Some of the guys over at Corvetteforum take the MAP reading table (in the chip programming) and lay it on top of itself (not sure how this works totally) so that it can read twice atmoshperic pressure. This would be good for about 16 lbs of boost.

Depending on what you want to do, an aftermarket ECU might be the best way to go.

Glad you are looking into TPI's. Great power makers and fun setups. Feel free to ask anymore questions you'd like. There are a couple guys on here who know a lot about TPI's and a couple more who know quite a bit about Turbo and boosted applications.
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