highest possible compression on pump gas
05-23-2006, 12:50 PM
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highest possible compression on pump gas building a 383 in a 01 SS Camaro and need to know what is the highest possible compression I could run with pump gas. I want to test the limit and make as much HP as humanly possible and still be some what streetable. Was considering 13.5 to 1. Going for 700hp N/A
05-23-2006, 12:54 PM
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Originally Posted by bignutsack
building a 383 in a 01 SS Camaro and need to know what is the highest possible compression I could run with pump gas. I want to test the limit and make as much HP as humanly possible and still be some what streetable. Was considering 13.5 to 1. Going for 700hp N/A
05-23-2006, 01:01 PM
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Yeah, you could do like 14 or 15+:1 if you wanted to. The tune and the cam will decide really; but at some point you will see dimishing returns. Timing usually makes more power than simply bumping compression Its the whole combo that you want to maximize. Engine Masters engines (pump gas, points for average hp/tq) use 12:1 on a regular basis. And they are usually using much less efficient head designs.
05-23-2006, 01:22 PM
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I am just starting my short block. I have a HTC crank thats it so far. Trying to come up with an overall game plan before I start buying parts. I'm new at this so any info would be much appreciated!
05-23-2006, 01:25 PM
#6
To hit 700 hp n/a on pump gas with only a 383... probably isn't gonna happen, no mater how big the cam is etc.etc. Are you going solid roller? Are you putting a sheet metal intake on, what heads?
I'd probably change the goal if I were you... 475 on pump gas with a 383 would be a good # to aim for, 500 would be pushing it. 700, isn't gonna happen without a power adder on pump gas.
I'd probably change the goal if I were you... 475 on pump gas with a 383 would be a good # to aim for, 500 would be pushing it. 700, isn't gonna happen without a power adder on pump gas.
05-23-2006, 01:51 PM
#7
Originally Posted by JL ws-6
To hit 700 hp n/a on pump gas with only a 383... probably isn't gonna happen, no mater how big the cam is etc.etc. Are you going solid roller? Are you putting a sheet metal intake on, what heads?
I'd probably change the goal if I were you... 475 on pump gas with a 383 would be a good # to aim for, 500 would be pushing it. 700, isn't gonna happen without a power adder on pump gas.
I'd probably change the goal if I were you... 475 on pump gas with a 383 would be a good # to aim for, 500 would be pushing it. 700, isn't gonna happen without a power adder on pump gas.
Those goals are really pushing it. The rule of thumb is not to go over 11 - 11.5 SCR or 8.5 to 8.6 DCR. I have a feeling that as you round off past 12:1 on pump gas, youre going to have to pull enough timing to take away any gains from the added compression. Pushing past that will only further exagerate that. If you really want to do this just to prove a point, go for it and just pull a bunch of timing and see if it runs. You can always put in race gas and change the tune later. 