Spiking problems

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05-05-03, 12:12 PM

TopSecretUSA

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Spiking problems

I have a t78 and a full exhaust. I run about 12lbs but it spikes to 14-15lbs which makes me very scared of running lean. What can I do to help this problem?

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05-06-03, 12:15 AM

TopSecretUSA

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Guess no answer?

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05-06-03, 10:32 AM

toddp31

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What boost controler are you using, also what spring is in your wastegate? What is in your car fuel system/intercooler exc?

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05-06-03, 10:48 AM

TopSecretUSA

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Its a manual boost controler. Just a generic controler, its the wastegate that came with the t78 kit. Nothing there was changed, stock injectors, upgraded fuel pump, big adjustable fuel pressure regulator, and a custom front mount intercooler. The exhaust is the downpipe/midpipe/catback combo.. however the catback and midpipe are welded together.

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05-06-03, 11:07 AM

toddp31

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I think the kit for the t-78 comes with a 1.1 bar spring in the wastegate, at least mine did for a t-88. 1.1 bar is around 15/16 psi, that might be the problem. If is was you I would invest in some injectors, stock injectors are working at there limits at that boost. What A/F are you running?

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