01-15-2016 | #21 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
|
Re: Corey does his magic
Graham,
Any thoughts on the Mercury Marine heads mated to an LSx block?
__________________
[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
01-15-2016 | #22 |
Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 184
|
Re: Corey does his magic
|
01-15-2016 | #23 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
|
Re: Corey does his magic
Would make for an interesting alternative to the LT-5.
__________________
[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
01-15-2016 | #24 |
Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 184
|
Re: Corey does his magic
Just a few comments on information stated earlier in this thread:
The LT5 was a premium fuel recommended application, so the production released ignition timing was about 5 degrees from borderline detonation. In test 1 form, as installed in vehicle with vehicle intake, exhaust and calibration the 1993 engine made 405 hp SAE corrected. In test 20 form, max potential, with open inlet, headers and LBT/MBT it made 445 hp. So there is easy power to be made from ignition timing and fuel on a stock system, add headers and more timing can be added, reducing back pressure tends to make the knock limit higher. Graham. |
01-15-2016 | #25 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
|
Re: Corey does his magic
Graham,
When dyno tuning my motor, I have found that knock appears to occur at ~4500-5500rpm range. However, beyond that the LT-5 appears to be knock tolerant. I've had WOT timing up around 34-35d with no indication of knock occurring at that level. Just a loss of power. AFR is ~ 12.8:1. How does that square w your experience and expectations?
__________________
[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
01-15-2016 | #26 |
Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 184
|
Re: Corey does his magic
On 93 octane fuel I would agree with the above.
Graham. |
01-15-2016 | #27 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
|
Re: Corey does his magic
Yes it's 93 Octane 10% Ethanol. Which brings up the question of doing E85 on an LT-5.ยข
__________________
[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
01-15-2016 | #28 | |
Join Date: Sep 2012
Location: Rockwall, Tx
Posts: 1,510
|
Re: Corey does his magic
Quote:
__________________
_________________ 1994 AB/Grey #141 430 RWHP/392 RWTQ FBI Lyposuction / Secondaries relieved of duty / SW Long Tube Headers / Corsa Exhaust / FIC SS Injectors / MSD Coils / Lightweight Pulleys / Corey tuned B & M Shifter / Aluminum Flywheel / Samco Hoses / Shelby Series One's / C4 No Flex Frame Stiffener BBC - Bling By Carter: Custom ZR-1 Center Caps / Custom Plenum Plate / Air Box Knobs / TB Cover / Oil Filter Cover |
|
01-17-2016 | #29 |
Join Date: Jun 2015
Location: Texas
Posts: 530
|
Re: Corey does his magic
The tires do appear to be slipperier, than they were before.
|
|
|