Compression
 

Hey guys, thinking about bumping my compression up this winter, not 100% trying to figure out if the hp/et gain is worth changing up my combo.
Now it has 12.5 going to 14.5-15, 582 BBC made 970hp

What hp and on track et you think i'll gain by 2 points ?
thanks in advance !

May help a little with consistency as well as HP. I'm going between 15 and 15.5 on my 460.

Alcohol love's compression, you can't get too much. Look at it this way top alcohol cars are running 12 to 1 and spinning the blowers at 40% OD pushing 40lbs boost. In the mid 80's i was running a 1471 blown alcohol 540" B/blk with 13 to 1 and spinnig the blower at 40%. I've got 11 to 1 in my s/blk with a 1471 and spinning it 1 to 1. I have 13.7 on the 377" and 14.5 on my 434"

JMO

Zip.

pickup in hp and et for sure.

i know you have heard enough about PAR racing engines lately...but here we go again.... all his raw motor engines is nothing less then 15 to 1..
My 15 to 1 565ci with smaller heads (valves) than yours is making 30 hp more than your 582ci

you put your 582ci 15 to 1 and i personally think you will put that bad boy close to the 1100 hp mark if the rest of your combo is right for the job. :wink:

I will say 80 to 100 hp gain and 2 to 3 tenths quicker...your 4.70's and 136 mph range now..right ?

IMO

How much is the main questions I guess, we talking 2-3 hundreths ?

Its very consistent as is, just thought if I was leaving a good tenth on the table ?

I've did this move before 10:1 to 15.5:1 on a alky motor, seen very little gain which I thought was odd.

Most high end builders are 15.5-16:1 making 1080-1100. I'd go out on a limb and say mine goes 1040-50 maybe higher on any dyno but Nyes. That dyno has to be bar none the most honest dyno I've seen.

80-100hp gain that'd be worth the jump for sure. Right now 4.7's@146 instead of 136

I wanted 12.5 and my engine builder told me to put at least 15-1 he said it would be a major difference but I'm building a 632 18* motor with two dominators. Ask Pat at Nyes you know he won't stear you wrong,he is very honest.

Hey compression is HP anyway you spread it..weather its achieved thru a turbo,blower,NOS or just built into the motor Naturally aspirated. there are no 11-12 to 1 engines setting any records out here...unless its static compression with a 30/35lb huffer sitting on top...lol :D

BJUICE you gona run that new one on alcohol or gas?