1600 Sprint Compression #s

[IamScotticus]

anyone have thier compression ratios and psi averages from a Caterham Sprunt spec 1600 Crossflow?

[MV8]

What are the specs for that engine (cam lsa, intake duration, compression ratio)? I'd guess 120-160 psi within 10% or each other for a good, well used engine. For a given duration and lift, a smaller lsa equals earlier intake valve closure for numerically lower idle vacuum and higher cranking comp.

[IamScotticus]

Hoping to get numbers from someone's car.

[Mudder]

My stock 1700 Super Sprint (6500 miles) 9.75:1 compression, cold comp test 151 psi on all 4 cylinders.

Your 1600 should be 9.00:1 (stock) and your cold comps probably around 140 psi.

Hope this helps.

[Mudder]

I forgot to mention that the comps were taken at an elevation of 8000ft and a local air pressure of around 22.00 merc. column.

[IamScotticus]

Thanks,

Im getting a distributor dialed in by a dizzy tuner and I really need #s for my same build and displacement.  I might just need to wait until after my rebuild with new ring pack, etc.

[IamScotticus]

delete

Edited December 31, 2023 by IamScotticus