Corey does his magic

[XfireZ51]

Graham,

Any thoughts on the Mercury Marine heads mated to an LSx block?

[grahambehan]

Originally Posted by XfireZ51

Graham,

Any thoughts on the Mercury Marine heads mated to an LSx block?

Should be good if they ever get to fruition, I hope they do and look forward to working on such an engine.

Graham.

[XfireZ51]

Originally Posted by grahambehan

Should be good if they ever get to fruition, I hope they do and look forward to working on such an engine.

Graham.

Would make for an interesting alternative to the LT-5.

[grahambehan]

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.

[XfireZ51]

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?

[grahambehan]

On 93 octane fuel I would agree with the above.

Graham.

[XfireZ51]

Originally Posted by grahambehan

On 93 octane fuel I would agree with the above.

Graham.

Yes it's 93 Octane 10% Ethanol. Which brings up the question of doing E85 on an LT-5.¢

[Fully Vetted]

Originally Posted by 32valvesftw

I picked up my 91 in March, it had Bola exhaust on it but was otherwise stock as far as I know. I removed the resonator and added an X pipe, then gave it to Corey H for headers and tune. Just got the dyno results 382 whp / 373 tq. Im impressed, I haven't driven the car yet but I can't wait to feel the difference.

Congrats! Yes, Corey is def an ace when it comes to tuning. We're fortunate to have him in our backyard. You'll love the difference.

[32valvesftw]

The tires do appear to be slipperier, than they were before.