Hi Guys,
I jacked up the engine on my Mustang. Looking for a silver lining, I'm looking to correct some mistakes while reassembling the engine.
The engine, 351W block bored 0.30 over. Stock crank, Stock rods, TRW L2378 pistons. Comp Cam 270H cam (35-414-3), Stock heads with mild cleanup. Performer manifold, 600 Holly 4160.
The cam specifications are; 270 duration, 110 lobe separation, intake centerline 106, lobe lift .313, valve lift .5 with 1.6 rockers.
Using Summit's compression estimate, 8.6:1.
So, the question, since looking through forums, I measured the deck clearance and estimate the quench at .092".....I know, bad.
I can change the pistons and head gasket to get the compression up to 9.5:1. I estimate the quench to be .035". Sounds better!
But, the pistons are the bath tube style dish. How does that effect the quench? Do I still have .035" or because the piston area is low, is the resulting quench more?
If the current setup would not be prone to pinging, I 'd probably run it until I could plan and build a better engine. I assume .092" would be very prone to detonation. Correct?
I'm not looking for a fire breathing street engine. The Mustang is a convertible. I have no plans to stiffen the body up enough to handle more power.
Thanks,
Scott
I jacked up the engine on my Mustang. Looking for a silver lining, I'm looking to correct some mistakes while reassembling the engine.
The engine, 351W block bored 0.30 over. Stock crank, Stock rods, TRW L2378 pistons. Comp Cam 270H cam (35-414-3), Stock heads with mild cleanup. Performer manifold, 600 Holly 4160.
The cam specifications are; 270 duration, 110 lobe separation, intake centerline 106, lobe lift .313, valve lift .5 with 1.6 rockers.
Using Summit's compression estimate, 8.6:1.
So, the question, since looking through forums, I measured the deck clearance and estimate the quench at .092".....I know, bad.
I can change the pistons and head gasket to get the compression up to 9.5:1. I estimate the quench to be .035". Sounds better!
But, the pistons are the bath tube style dish. How does that effect the quench? Do I still have .035" or because the piston area is low, is the resulting quench more?
If the current setup would not be prone to pinging, I 'd probably run it until I could plan and build a better engine. I assume .092" would be very prone to detonation. Correct?
I'm not looking for a fire breathing street engine. The Mustang is a convertible. I have no plans to stiffen the body up enough to handle more power.
Thanks,
Scott