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Old 05-02-2003, 08:36 AM
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Post retro fitting EFI or TPI on carbed 350

I'm looking at retro fitting my 86 350 HEI with an efi ot tpi unit. Anything in particular to look out for? Can it be done easily? do I need different heads?

Thanks
Mark
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Old 05-02-2003, 09:30 AM
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I did this on the Hot Rod. What heads are you using? and it depends on the TPI unit that you get if you will need to modify the manifold (all that would have to be done is to slot the center holes on the manifold, It will still seal fine). I would suggest running a aftermarket harness so that you run the speed density (MAP Sensor) instead of the MAF sensor. There are several companies that make a harness for this applications such as Street & Performance, Painless, TPI Tech (this is the one that I am using). Plus make sure that you get the injectors for a 350 if that is what you are running as the ones for a 305 will not flow enough fuel for the 350.

[ May 02, 2003: Message edited by: EBlack36 ]</p>
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Old 05-02-2003, 02:52 PM
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When you modify the center holes on your manifold they have to be at 73' instead of 90 like the rest.
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Old 05-12-2003, 12:51 AM
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Interesting info at www.customefis.com
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