sr20det intake manifold swap
Posted: Sat May 30, 2009 3:06 pm
red top sr20det in a 240sx has fmic, 3 inch turbo back exhaust, AEM wideband mounted in the test pipe, otherwise stock.
I got the greddy knockoff plenum onto the car just lately, seems I lost a pound of vacuum. It was at 8.4 and now is 7.3 at idle. This caused the A/F ratio to be at 18.0 at idle. I messed around with many values like my K constant up to 26475 from 21475 stock and got results but made the rest of the power band very rich. I put that back to normal and got a result of 14.9 A/F ratio from changing only the lower left block on the fuel map to 11.00
This works fine but does it sound crazy to you? It makes the 3D graph go underneath itself in that spot. Should I really wait till the supporting mods like the z32 mafs, gt2871r turbo, and larger injectors are fitted?
I got the greddy knockoff plenum onto the car just lately, seems I lost a pound of vacuum. It was at 8.4 and now is 7.3 at idle. This caused the A/F ratio to be at 18.0 at idle. I messed around with many values like my K constant up to 26475 from 21475 stock and got results but made the rest of the power band very rich. I put that back to normal and got a result of 14.9 A/F ratio from changing only the lower left block on the fuel map to 11.00
This works fine but does it sound crazy to you? It makes the 3D graph go underneath itself in that spot. Should I really wait till the supporting mods like the z32 mafs, gt2871r turbo, and larger injectors are fitted?