How much compression?
How much compression? Im not sure if this is where I need to be asking this question but it seemed as good as any to me!!! I am doing my first ls1 build in an 01 b4c. I have completely rebuilt the motor and I am waiting on a stall to finish the build. I figured this would be a great time to run a compression test to give me an idea of what kind of power this think might be making. All stock bottom end with new bearings. Had the heads milled a little and ported/polished. Comp 252/256 .595-.595 112+2 lsa. Just built to be a fun daily driver. Compression test shows 225 or so (my compression tester is a heap). Is this fairly normal for this motor or am I going to have to run some pretty hot fuel in it?
Lemme do some digging on my comp here. I used to have a compression calculator with all the comp lobes in a spreadsheet.
EDIT: I have it, but it doesn't work.(stupid computer reformat!)
Do a search for "ls1 compression calculator" you'll find something.
EDIT: I have it, but it doesn't work.(stupid computer reformat!)
Do a search for "ls1 compression calculator" you'll find something.
Im not sure... The car is at my shop which is 50 miles away... Ive got all that info at the shop but I won't be back to get in until this weeken but I will try to remember and get it!
I think I remember a guy doin a compression test on a stock LS1 and he was getting 220 in each cylinder, dont take it to the bank though cause I really dont remember if his was stock. If you had the STOCK LS1 heads milled then you are probably lookin at 10.5 or 10.7 I think if anymore is done in them than that you would have to flycut the pistions with that cam.
91 or 93 octane should do you just fine
91 or 93 octane should do you just fine
1978, 280z, calculator, compresion, compression, compresson, comression, cylinder, datsun, ls, ls1, motor, tech, test
