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84LX89GT · 11-11-2003, 09:11 PM

I was wondering how much power i could get from my 302 by increasing the compression ratio of my GT40 heads from 9:1 up to 10:1 or even 10.5:1?

How about a 200 straight six with 8:1 compression going up to 10:1

Thanks,

note: i haven't installed my GT40 heads yet so any suggestions as to anything else i may want to do is greatly appreciated (i'm going to gasket match, don't think i want to port/or have them ported unless it makes a huge difference)
Is increasing the compression ratio worthwhile since i'm going to be using nitrous oxide - i don't want to blow holes in stuff.

11-11-2003, 09:11 PM	#1
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	increasing compression ratio I was wondering how much power i could get from my 302 by increasing the compression ratio of my GT40 heads from 9:1 up to 10:1 or even 10.5:1? How about a 200 straight six with 8:1 compression going up to 10:1 Thanks, note: i haven't installed my GT40 heads yet so any suggestions as to anything else i may want to do is greatly appreciated (i'm going to gasket match, don't think i want to port/or have them ported unless it makes a huge difference) Is increasing the compression ratio worthwhile since i'm going to be using nitrous oxide - i don't want to blow holes in stuff. __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock) Last edited by 84LX89GT; 11-11-2003 at 09:38 PM..