Quote:
Originally Posted by kronk_5
we were using octane booster to get to the 98 and yes he seemed to be timing limited from what i rember him saying
so it sounds like the move will be to get back on mhd, get someone to e tune it so its safe at the altitude, and make a switch to e30 so that it can run more boost and timing.
what sort of numbers should i be looking for on mhd stage 2+ on 91 and e30 so i can make sure it is actualy the tunes and not something mechanical not preforming as it should
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I heard octane boosters don’t work as well as they claim and the one I used (Gold Eagle 104+) barely helped my timing corrections. If you make an E30 mix with 93 octane as your base you’ll be at an octane rating of 98.6, which is what cleared up my timing corrections.
From what I understand, when you increase boost you also need to decrease timing. So for example if an NA engine can run at 23 degrees of timing stock, a boosted engine will need to run 15 degrees of timing. It’s counterintuitive but I’m assuming your Cobb tuner wasn’t decreasing timing accordingly when increasing boost.
On 17t’s you should be able to push 22psi of boost, which would land you somewhere in the 500 whp range on pump gas (someone correct me if I’m wrong).
I recommend working with Ken at Wedge Performance as he created the OTS MHD map for the N54. He only tuned N54s and so he has a very good handle on how they behave and how they should be tuned. What he’ll do is send you a base map and tweak until both of you are happy with the outcome. He could send you as many as 10 map revisions before you’re finished.