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Fri Jun 25, 2004 4:05 pm

Okay so my engine is a 1904cc engine with Kads, 044 mags, Engle 110. I was talking today with the owner of a reputable Bug shop. (they've built three record holdin engines) and I was talking to him about squeezing some performance out of my motor. I was thinking about what a merged header could do for me. He asked me some questions and flipped out when I told him the Compression ratio was about 7:1 he said that that's pretty low and that I should raise the compression and doing this would not harm my engine but actually help it run better? Any opinions?

Fri Jun 25, 2004 4:55 pm

He's right, if your gona drive it daily id go with about a 8 or 8.5 to 1 that will give you the performance boost your looking for.

Fri Jun 25, 2004 5:38 pm

I have been told by my engine builder to stay around 8 to 1 i had my 2110 built 8.5 to 1 thats the most he and me friends recommend to help it stay running cool.. :lol:

Fri Jun 25, 2004 9:17 pm

Im in the process of building a 1914 with 9 to 1 comprssion, with a web 110. Im going to use this motor for daily driving, and to have a little fun at the strip

Fri Jun 25, 2004 10:34 pm

hmm interesting, christammizoie@cox.net you mentioned runnign a higher compression to make the engine run cooler? I always thought a higher compression made the engine run hotter. Well then lemme' know what some more of you dudes think

Fri Jun 25, 2004 10:35 pm

lol sorry I didn't mean for that to come up as a link

Fri Jun 25, 2004 11:25 pm

Too low will a CR will run hot and too high a CR will run hot, you need to determione the type of driving you are going to do and set the CR with that in mind. My 1904 is set at 8:1 and it is still a little low, I would go with 8.5:1 or 9:1 if I were to do it again. I am currently building a 2332 and am going to set the CR somewhere between 9:1 and 9.5:1 for premium pump gas.

Sat Jun 26, 2004 2:38 am

Go at least 8-8.5:1. My 2 liter, drive anywhere engine is at 8.5:1 and I only feed it 87 octane. If you were willing to use higher octane, you could probably go a bit higher.

Sat Jun 26, 2004 3:09 am

Yes what i meant the higher the comp the hotter it will run sorry for confusion all the people i know say for driving on street not over 8.5 to 1.. mines just a weekend cruiser for the car shows but if you get stuck in traffic you coild get hot if you run over that.. and i run super unleaded the higher octane the better i have been told.. :D

Sat Jun 26, 2004 3:24 am

I have always run higher than 9.0:1 for the street. Just gotta make sure that you are getting enough cooling. I have decklid standoffs, fan assisted cooler and run octane booster on really hot days (100+) as a precaution to keep those pingy thingies away. I had 73k miles on my last 2275 and that was 9.6:1.

Sat Jun 26, 2004 10:33 am

9.6:1 :shock: lordie.... now of course for me to get this added compression I do have to pay money, which of course I lack at the moment. So once I get stuff that I need done I'll take a looksie at this.

Sun Jun 27, 2004 9:44 pm

Quote: and i run super unleaded the higher octane the better i have been told..

Actually, unless you have a high enough compression ratio running very high octane fuel will make the motor run like crap, and by the same token a high compression engine will ping on too low of an octane. The higher octane fuels burn slower than the low octane ones.