Crossflow compression ratio's
Discussion
I own a bit of a mystery engine??
The pink vixen is pinking. engine ran sweetly prior to me messing with timing etc, engine spec however is non standard. i have stripped head off engine and pistons are 60 thou oversize. A little hand written note on the tatty haynes manual that came with the car says "use 1600 pistons with 60 thou machined from crown. I have no idea what the cam is, but the compressions are 195, 175, 190, 190psi.
I do not know whether the engine is tuned or just skimmed in the head to cure past warpage. the bores etc are immaculate but I just do not know the spec of the engine.
Does anyone know what a standard GT vixen crossflow should give in terms of compression figures. also what does 190psi translate into in terms of ratio??
I do have a get out plan, in the form of a fast road engine from my other vixen which is going to morph into a griffith 400 replica over the next 6 months or so, but cannot help but feel that the original engine is just needing some timing work and ignition help due to non standard measurements. any ideas??
Neil.
The pink vixen is pinking. engine ran sweetly prior to me messing with timing etc, engine spec however is non standard. i have stripped head off engine and pistons are 60 thou oversize. A little hand written note on the tatty haynes manual that came with the car says "use 1600 pistons with 60 thou machined from crown. I have no idea what the cam is, but the compressions are 195, 175, 190, 190psi.
I do not know whether the engine is tuned or just skimmed in the head to cure past warpage. the bores etc are immaculate but I just do not know the spec of the engine.
Does anyone know what a standard GT vixen crossflow should give in terms of compression figures. also what does 190psi translate into in terms of ratio??
I do have a get out plan, in the form of a fast road engine from my other vixen which is going to morph into a griffith 400 replica over the next 6 months or so, but cannot help but feel that the original engine is just needing some timing work and ignition help due to non standard measurements. any ideas??
Neil.
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