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10-18-2017, 09:08 AM
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#1 |
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LT4 M6
Drives: 2018 ZL1 1LE Join Date: Nov 2010
Location: Bloomington, IN
Posts: 1,249
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What compression ratio are you running? looking to rebuild.
So far the two shops I contacted want to rebuild my or replace my engine with a 417 CI and drop the compression to 9.1.
I really love the sound of high compression at idle. I also am totally happy with what I have now. Is there any real reason why I cant just get my same 6.2L set up but in a forged version. Or is dropping the compression necessary. I plan on tracking the car. Maybe 1 or 2 times a year. |
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10-18-2017, 09:29 AM
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#2 |
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'It's an experiment'
Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014
Location: Dallas TX
Posts: 8,694
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Forged LSA 416 10.5 cr...
Ported LSA blower, 2.45 upper, 9.17 lower, 13.5 PSI boost, E85 -Don
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747 RWHP 794 RWTQ
"Horsepower sells cars, torque wins races." - Enzo Ferrari See My Build: http://www.camaro5.com/forums/showthread.php?t=385577 Last edited by hammdo; 10-18-2017 at 05:56 PM. |
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10-18-2017, 02:18 PM
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#3 |
 
Drives: IOM 2SS/RS Join Date: Dec 2011
Location: Qatar
Posts: 702
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Iron 370 9.5:1 cr
twin turbo pte 6766 |
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10-18-2017, 02:54 PM
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#4 |
 Drives: 2011 Camaro 2SS Join Date: Sep 2015
Location: Houston
Posts: 410
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I'd do high compression
only reason id advice against it is if you don't want to run 93/meth/e85 I'm running twins on 11.1 compression no problem |
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10-18-2017, 02:57 PM
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#5 | |
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LT4 M6
Drives: 2018 ZL1 1LE Join Date: Nov 2010
Location: Bloomington, IN
Posts: 1,249
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Quote:
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10-18-2017, 03:13 PM
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#6 | |
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Drives: 2011 Camaro 2SS Join Date: Sep 2015
Location: Houston
Posts: 410
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10-18-2017, 04:26 PM
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#7 |
        
Drives: 2009 ZR1 Join Date: May 2010
Location: KCMO
Posts: 3,205
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10.5:1 with iron block, E85 and meth
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10-18-2017, 06:33 PM
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#8 |
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LT4 M6
Drives: 2018 ZL1 1LE Join Date: Nov 2010
Location: Bloomington, IN
Posts: 1,249
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I will be happy with 8 psi.
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10-18-2017, 07:53 PM
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#9 | |
 Drives: 2014 1LE, 1996 z28 Join Date: May 2015
Location: United States
Posts: 172
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10-18-2017, 08:24 PM
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#10 |
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Drives: 2010 Camaro SS Join Date: Dec 2006
Location: MN
Posts: 1,172
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If you’re not going E85...stay in the 9-10:1 range. If you are going to do E85...then you’d be smart to be in the 10.5-11:1 range.
There’s a good highly technical article out there somewhere that explores what’s better...more compression and lower boost...or lower compression and higher boost. The conclusion of it is that your always better lowering compression and turning up the boost. Some argue that’s old school and that these new engines and heads are so efficient that you can up the compression. But most people also want E85 too. Fun topic to research. Tough to answer. I’m contemplating the same thing. |
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10-19-2017, 09:25 AM
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#11 |
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Drives: 2011 Camaro 2SS Join Date: Sep 2015
Location: Houston
Posts: 410
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So let me get this right you're running a stock 6.2 stock compression on 8 psi with a maggy right now?
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10-19-2017, 10:07 AM
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#12 | |
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Drives: 2010 Camaro 2SS M6 - Intake/Exhaust Join Date: Sep 2014
Location: Bridgewater
Posts: 693
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10-19-2017, 02:33 PM
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#13 |
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Drives: 2011 convertible 2ss/rs Join Date: Sep 2015
Location: Houston
Posts: 971
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408 stroker 10 rib supercharged maggie at 10.1
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10-19-2017, 07:23 PM
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#14 |
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700RWHP-650TQ
Drives: 2011 Forged LS3 Supercharged/Cammed Join Date: Aug 2010
Location: Shrewsbury Massachusetts
Posts: 5,269
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Forged LS3 10:1
SLP Supercharger 12lbs
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