dga280z

Thanks!

Please sign me up. Where should I send my $$ and address?

A little extra fuel in spots can really smooth out some rough patches. Glad it worked out!

Hi I don't use that software so I cant help with the specific setup. But I thought that the mix of TPS/MAP input could be varied over the full operating range in MS-II. In any event, try mainly/all TPS and see if it smooths out in the trouble range. If it does, then it would appear that the big cam is causing the MAP sensor some issues. If not, then big cam vacuum distortions at light load/low rpm would appear not to be the case. Don

My thought would be to use mainly TPS until about ~2500-3000 rpm. The large cam can cause vacuum variances at lower rpm. This causes distortions to the MAP readings which, in turn, can cause rough fuel management at these lower rpms. This may be particularly true under lower loads. Once load or rpm increases enough, this all smooths out making MAP based management more reliable. The bigger the cam, the more this impact expresses itself. As an experiment, try 100% TPS to 2500 rpm and then transition to mixed TPS/MAP above 2500 rpm. Let us know.

Call Whitehead Performance in Toronto. 30 years experience. Honest team of experienced Z mechanics and builders. www.whiteheadperformance.com

Try calling Greg Whitehead at www.whiteheadperformance.com in Toronto. His team is atleast equal to Rebello and his work is done in Cdn dollars. Definitely one of the top Z shops in North America.