Subject	The CR has to be matched to the turbos Pete
Posted by	Carlos Ramirez on October 30, 2003 at 5:54 AM
	This message has been viewed 64 times.
In Reply To	What compression should I go with? posted by TwinTurboPete on October 29, 2003 at 11:42 PM
Message	I went with 8.6:1 as I don't mind using race gas to run the higher boost. The higher the CR the higher the octane requirements but the better off boost and low and mid speed drivability. The current trend is to use smaller turbos on and mid compression engine to get a smoother power curve. However we both have larger turbos that can run 28-34PSI and after 116 octane fuels become a big issue. These guys are talking about smaller turbos that probably will never see 20+ psi on a constant basis.
Follow Ups	Endyne Pistons - aliaZ 20:24:00 10/29/03 YAY! I can not wait.... I must have. - ni[X]it 20:25:31 10/29/03 my pleasure (n/m) - aliaZ 20:41:41 10/29/03 who want 9.2 : 1 in a TT? (n/m) - Halo Z 20:30:12 10/29/03 I do. Bigtime. - ni[X]it 20:32:00 10/29/03 you are a weird one nick. (n/m) - Halo Z 20:33:31 10/29/03 You just wait Ric. I'll show you. *I'll show you ALL* - ni[X]it 20:34:40 10/29/03 I was thinking about 9.5:1 - Chip(GMS Racing) 20:41:10 10/29/03 yup. my goals arent the same tho. - ni[X]it 20:44:50 10/29/03 Shouldn't HP be up, torque down a bit with a higher CR? - Marshall 20:47:24 10/29/03 i think that is a by product of SOHCs vs DOHCs - Halo Z 20:51:48 10/29/03 no, even on the same engine, such as VG30DE vs. VG30DETT - Marshall 21:47:48 10/29/03 Apples to oranges - Chip(GMS Racing) 22:18:11 10/29/03 yeah, on pump gas - Marshall 22:34:22 10/29/03 You are correct, I am always thinking about my setup - Chip(GMS Racing) 22:36:00 10/29/03 FWIW... - aliaZ 07:11:58 10/30/03 Testing needs to be done before that claim is made. - Marshall 09:07:48 10/30/03 testing has already been done... - aliaZ 09:53:10 10/30/03 interesting... - Marshall 12:00:11 10/30/03 It will increase both, it is essentially raising the VE of - Chip(GMS Racing) 20:59:59 10/29/03 but a lower CR/higher boost combo will always make more TQ. - Marshall 21:50:09 10/29/03 Catch 22: Turbos have to be spooled = not low end. (n/m) - MugenRacer 09:36:33 10/30/03 yeah - Marshall 11:57:28 10/30/03 What compression should I go with? - TwinTurboPete 23:42:20 10/29/03 The CR has to be matched to the turbos Pete - Carlos Ramirez 05:54:15 10/30/03 I don't want to use race gas all the time. - TwinTurboPete 08:01:07 10/30/03 at 18PSI we should be around 580-600RWHP which is ok for pum - Carlos Ramirez 09:30:30 10/30/03 and I wouldn't go much further than 8.5:1 because - Carlos Ramirez 10:31:51 10/30/03 I do too - aliaZ 20:40:54 10/29/03 Re: Endyne Pistons - 300Z31 20:33:58 10/29/03 not that I could tell - aliaZ 20:38:10 10/29/03 sweet... - Spee 20:38:52 10/29/03 looks like a good idea.. - Carlos Ramirez 20:45:42 10/29/03 how's your car coming along? - Spee 21:03:53 10/29/03 Actually I do.. - Carlos Ramirez 21:15:32 10/29/03 thanks (n/m) - aliaZ 21:31:01 10/29/03 Where can we get them, and how much are they? (n/m) - boileralum 20:52:08 10/29/03 they are brand spanking new - aliaZ 21:36:00 10/29/03 first you go fondling my EFI harness, now you're spanking - Guapo 21:50:44 10/29/03 lol (n/m) - aliaZ 22:10:43 10/29/03 Thanks. I'm still not 100% decided if I want to do a stock - boileralum 22:00:38 10/29/03 Beautiful. Where Can I get 6 of them? (n/m) - bb0ys 20:53:11 10/29/03 I'll get pricing and availability info shortly (n/m) - aliaZ 21:32:16 10/29/03 Not really, you can mod the head to do the same thing - HakenTT 21:20:30 10/29/03 good idea. Everyone go and dremel your heads now. - Spee 21:27:40 10/29/03 awesome. maybe you could do a FAQ on that? (n/m) - Guapo 21:28:50 10/29/03 bad idea - aliaZ 21:30:09 10/29/03 don't argue with him. - Spee 21:39:57 10/29/03 lol (n/m) - Tennyson (ATL) 21:49:59 10/29/03 What a doofus.... (n/m) - RSR 06:12:01 10/30/03 Niiiiiicccccccceeeeeee :-)............................... (n/m) - Kyle(Houston) 21:38:12 10/29/03 I might be interested in these. (n/m) - BooZTT (Hawaii) 22:42:27 10/29/03 good one spee :) - EMPIRE_zTT 23:01:01 10/29/03 purdy! - Janders 23:15:40 10/29/03 Gonna Swain coat 'em? Still seems like 2 much compression. - teahead 10:48:11 10/30/03 I agree, too many people read magazines these days. - nixit 12:16:38 10/30/03
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