Subject	I ran into detonation issues at different loads going to
Posted by	SirpriZ on January 06, 2007 at 2:55 AM
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In Reply To	Curious about 9.0:1 compression in a TT engine. posted by WAGGZ on January 05, 2007 at 10:37 PM
Message	9:1. However, I am in Ca. with the pee pee 91 octane. My guess is 93 octane would have taken care of the detonation issues. Just FYI, higher compression actually increases spool time (it takes longer for them to spool), as more of the exhaust energy is used up in the combustion process. It feels like the turbos spool faster because of the increase in power due to the higher compression. I'm sure others have a different experience with raising compression, but if I had it to do over (which I might), I would have left the compression at 8.5/1 and not had the detonation, and custom tuning issues to deal with. My .02$, Mark
Follow Ups	Curious about 9.0:1 compression in a TT engine. - WAGGZ 22:37:38 01/05/07 One member already has higher compression pistons but i cant - NobleZ 23:00:38 01/05/07 Carl M.(racerZX) has NA pistons I believe. - WAGGZ 23:08:22 01/05/07 I believe member Scotts94z32 has 9:1 compression - octavian-z 23:10:30 01/05/07 he has the 675 turbos (n/m) - octavian-z 23:20:47 01/05/07 just turbo an NA engine and be done with it :) - vorpalZ 23:08:04 01/05/07 too high - WAGGZ 23:15:56 01/05/07 true, smaller turbos would work better - vorpalZ 23:32:11 01/05/07 the NA engine can't hold boost too well - WAGGZ 23:42:12 01/05/07 wasn't going to boost to his levels - vorpalZ 23:45:37 01/05/07 I believe he only went to 14psi. - WAGGZ 23:49:58 01/05/07 currently have *no* turbos for the 'vert - vorpalZ 00:05:40 01/06/07 Woody75(denver) is the member that has 9.2:1 compression - NobleZ 23:14:01 01/05/07 Member Aliaz has them as well. - Woody75 (Denver) 23:49:32 01/05/07 I'm at 3760 fasl and you are what....5800? - WAGGZ 23:54:18 01/05/07 I knew I wasn't going crazy! I was going to mention Aliaz - Agner.S(CT) 00:37:50 01/06/07 I've got the Endyns as well, just not installed. - ni[X]it 08:06:17 01/06/07 Scotts94z32 sounds like something you need to look - EricTTZ 23:49:34 01/05/07 I ran into detonation issues at different loads going to - SirpriZ 02:55:49 01/06/07 What rpm in 3rd do you get full boost or 1 bar? (n/m) - AzHeat 10:30:21 01/06/07 Manifold starts to see positive pressure around 3,000 - SirpriZ 14:00:48 01/06/07 well - aliaZ 11:14:13 01/06/07 Hi Don. Good point. I guess it's hard to factor that out - SirpriZ 13:53:38 01/06/07 Hi Mark! - aliaZ 14:00:11 01/06/07 Engine fix is moving in a good direction (sounds like - SirpriZ 14:04:24 01/06/07 Have you talked with Mike Smith about this? - Woody75 (Denver) 12:24:39 01/06/07 We're saying the same thing...I put it poorly. Increased - SirpriZ 13:52:08 01/06/07 Actually, I think you did mean that higher compression - SirpriZ 14:13:23 01/06/07 Yes, I'm saying the sources disagree. - Woody75 (Denver) 16:02:51 01/06/07 My source is better than your source! And yes, good - SirpriZ 17:33:56 01/06/07 So... higher compression = more lag, right? (n/m) - WAGGZ 17:20:54 01/06/07 Yes, but..... - SirpriZ 17:56:53 01/06/07 Don't believe everything you read on the internet. (n/m) - ni[X]it 09:28:40 01/07/07 What octane fuel in your state? (n/m) - SirpriZ 18:01:55 01/06/07 91, BUT I have already planned to use a mixture of race - WAGGZ 18:56:55 01/06/07 I don't think you'll be disappointed by the bump - SirpriZ 20:14:48 01/06/07
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