300 is high, but static Comp depends a bit on cam timing...
Printable View
300 is high, but static Comp depends a bit on cam timing...
Im running stock b16a2 cams with stock cam gears so overlap is stock, but compression is 11.5, will there be an issue with detonation?Quote:
Originally Posted by tinkerbell
If you're concerned about detonation run a higher octane, or make your own race fuel. It's not hard, just google it.
no - if you are concerned about detonation, then fix the problem properly...Quote:
Originally Posted by newpaddy3
Lerlo - there is no way we can tell from behind our keyboards if there will be a problem with detonation - SOOOOOO many things can cause it... so you need to prevent it by designing your system properly...
lol sorry, I was drunk last night.
tinkerbell is right though.
Are you getting a reading of cel 32 or whatever the knock sensor throws out? Or are you just wondering if you may have a problem with detonation in regards to your build?
Thanks tinkerbell, I got the car started and its idling fine now. No knocking on the PFC commander, all good for now. :)Quote:
Originally Posted by tinkerbell
IM just wondering if I may have detonation in regard to my build, yeah. Cos Im using stock cam gears, therefore stock overlap but high compresison pistons....Quote:
Originally Posted by newpaddy3
yes - you will get detonation if your setup is not tuned or poorly designed. it is not simply a matter of overlap vs compression.
who tuned/is tuning your PFC?
what is you 'calculated' compression ratio?
what spark plugs, what fuel system, what ignition system? etc...
all these can play a part in detonation and knock...
I havent actually read most of the recent comments in this thread, so dont flame me if it's a little off topic, but Im just going to add my 2cents worth anyways... one very important point that it seems most people over look is the fact that a certain static compression ratio can have different detonation characteristics depending on the combustion chamber shape and size, as well as the cam timing which will determine the engines dynamic compression
Quick question, Im using a b16a sump and b16a dipstick on the b20 block, will the dip stick reading be accurate?
why don't you use the B20B dipstick?
won't that be correct?
He's using a b16 sump which i'm presuming he isnt sure if its the same as b20 or not.Quote:
Originally Posted by tinkerbell