Tuning Built Rb25det But Timing Is An Issue

[17psi r33]

hi all, just had my motor rebuilt, all the usual stuff forged bottom end tommie cams port polished and flowed head by jhh, gt3076r with rear .82r housing all supporting gear, pfc 660cc injectors greddy plennum hks low mount manifold 044 fuel pump ect nothing missed, but when tuning the car would only push 412rwhp at 20psi heaps of psi left in it but did not push for more as the timing was a problem, at idle the cas was all the way to the right to get the 15deg at idle which the tuner thought cames where out but had aquick look and found that they matched up on top dead center marks, also the car had to have a high idel cause at lower rpm the was a miss but under throddle the miss was not there. oh and im running a water methanol kit if that changes any thing. what could be the reason for the cas to be so far retarded and the slight miss im assuming could be diry injectors?

[blind_elk]

Some timing lights appear to double the reading when setting idle timing.

Safest method is to insert a spark plug lead between #1 coil and #1 spark plug, then set timing "old school".

[STATUS]

hi all, just had my motor rebuilt, all the usual stuff forged bottom end tommie cams port polished and flowed head by jhh, gt3076r with rear .82r housing all supporting gear, pfc 660cc injectors greddy plennum hks low mount manifold 044 fuel pump ect nothing missed, but when tuning the car would only push 412rwhp at 20psi heaps of psi left in it but did not push for more as the timing was a problem, at idle the cas was all the way to the right to get the 15deg at idle which the tuner thought cames where out but had aquick look and found that they matched up on top dead center marks, also the car had to have a high idel cause at lower rpm the was a miss but under throddle the miss was not there. oh and im running a water methanol kit if that changes any thing. what could be the reason for the cas to be so far retarded and the slight miss im assuming could be diry injectors?

best bet is to pull a spark plug and fit a conventional lead from plug into end of coil-pack and read the timing directly off the lead, i have had a few cars misread (too much noise) from the rear timing loop..... its not common but i need to do it once or twice a month as the indicated timing is too far off centre to be correct..