RPM puzzle
10-03-2007, 09:17 PM
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RPM puzzle Hey guys, I have a puzzle if anyone wants to try their hand at it. Here it goes:
After running for about 30 to 90 min, the car spins at about 2500 rpms when it gets gas before it slowly comes down over a minute or a few, to its regular idle speed (in neutral). Also, since it has started doing that, it is also more prone to stall immediately after starting, which I try to rectify by flooding it with gas as soon as it starts. This all started after a recent ‘upgrade’, here’s the setup:
1998 Z28 camaro with the following: manual trans, 5.3L ported heads w/ larger valves, comp cams 224/228 .581 lift cam, comp cams 918 springs, dual timing chain, LS6 oil pump, cometic gaskets, pacesetter headers, bosch O2 sensors, TSP catted Y-pipe, LS6 intake, SLP ported throttle body, 1999 style valve covers, free-ram air, SLP lid, SLP dual/dual exhaust, UD pulley, NRK TR-55 sparkplugs. Deleted AIR/EGR/rear O2s.
I did all the work at once, and for the curious, it dyno’d 410 rwhp.
After running for about 30 to 90 min, the car spins at about 2500 rpms when it gets gas before it slowly comes down over a minute or a few, to its regular idle speed (in neutral). Also, since it has started doing that, it is also more prone to stall immediately after starting, which I try to rectify by flooding it with gas as soon as it starts. This all started after a recent ‘upgrade’, here’s the setup:
1998 Z28 camaro with the following: manual trans, 5.3L ported heads w/ larger valves, comp cams 224/228 .581 lift cam, comp cams 918 springs, dual timing chain, LS6 oil pump, cometic gaskets, pacesetter headers, bosch O2 sensors, TSP catted Y-pipe, LS6 intake, SLP ported throttle body, 1999 style valve covers, free-ram air, SLP lid, SLP dual/dual exhaust, UD pulley, NRK TR-55 sparkplugs. Deleted AIR/EGR/rear O2s.
I did all the work at once, and for the curious, it dyno’d 410 rwhp.
