Compression vs Horsepower

Low EG-T said:

i thought we squashed this shit.......

Click to expand...

:stupid:

Let them keep going. This thread has a bunch of good info in it.
They both have good points if you break down what there saying.

105 octane pump gas, $2.49 a gallon.....it'll run 13:1 with ease

it should actually be sticked minus the bullshit of course

hi all i own 2 civics a 92 4 door dx with d15b vtec and a 94 2 door ex motor pull ready to drop another d16z6 back in

/\ /\ What up Dillon! A little off topic but this is my bro from the Casino.

He could also benefit from a nice bump in compression in either of his D's.

yea, more neg rep for crossdress!!

Man 10 pages later....Did the question in the first post get answered???? LOL.

CrxKev said:

Man 10 pages later....Did the question in the first post get answered???? LOL.

Click to expand...

rule of thumb is about 5whp per full point under optimum conditions.

dragman99 said:

rule of thumb is about 5whp per full point under optimum conditions.

Click to expand...

I thought it would be more than that. Sound like I might go turbo instead.

CrxKev said:

I thought it would be more than that. Sound like I might go turbo instead.

Click to expand...

well, optimum conditions includes a lot of things that make even more hp. it helps me to think of everything as a combination, but you should see about 5whp per point just from compression when all is said and done.

I have seen around 5 percent hp to the wheel increase per point on most NA hondas.

per point I assume

9.2 to 12.5, 4.5 points.....12-13% gain?????

lets see, 127 bhp + 15% = 146 bhp

another 10 bhp from a DC cheap header for 156 bhp.

very possible, very 1998-1999 already been done possible

I think every people who give their opinion here are true. Remember a Z6 runs 9.2CR and higher timing than Y8 who has 9.8:1 and low timing, they make almost the same power out at the at real similar rpm range.

Yes you can make power with low compression and high timing, but you'll gain little bit more torque with higher CR where power is created, room for mistakes is little, the more you run higher CR.