How Much HP, Per 1 Compression Increase
09-05-2009, 11:25 AM
#1
How Much HP, Per 1 Compression Increase I was wanting to know if there is a general rule on how much HP increase in one full point of compression.
So like 10.1 to 11.1 =?
or
10.1 to 10.5 to 1
Just wanted to see if there was a rule or specific HP Gain for the Compression Increase.
So like 10.1 to 11.1 =?
or
10.1 to 10.5 to 1
Just wanted to see if there was a rule or specific HP Gain for the Compression Increase.
09-05-2009, 11:35 AM
#2
You'll see estimates ranging from 3-4%.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
09-05-2009, 07:03 PM
#5
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I was going to post a similar thread..haha
How much for .5 point increase in compression?
I'm trying to decide if I really want to mill the stock 799/243 heads... should bump it from 10.5:1 to 11:1.
How much for .5 point increase in compression?
I'm trying to decide if I really want to mill the stock 799/243 heads... should bump it from 10.5:1 to 11:1.
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09-18-2009, 09:46 PM
#10
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If that Otto Cycle efficiency chart is true, it looks like there is really not as much to be gained going from 8:1 to 10:1 on something like a 346 LSX. Assuming you make 346 hp on that same 346, it looks like there is up to a 10% gain in hp, going from 346 hp to about 380 hp, assuming heads and cam stay exactly the same.
09-20-2009, 09:32 AM
#11
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Research OK, maybe I'm not in the right thread but try this on for size. I have a stock 5.3 with the Edelbrock intake and carb setup. I want to put 317 heads and a radical cam and change the intake to a dual four. I have 6 pre set timing curves to work from. This is for an everyday driver "streetrod" 1955 belair. I'm fairly new to the ls series engines but I'm learning fast.
09-20-2009, 02:55 PM
#12
OK, maybe I'm not in the right thread but try this on for size. I have a stock 5.3 with the Edelbrock intake and carb setup. I want to put 317 heads and a radical cam and change the intake to a dual four. I have 6 pre set timing curves to work from. This is for an everyday driver "streetrod" 1955 belair. I'm fairly new to the ls series engines but I'm learning fast.
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