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Ah ok, so does that timing above look right?
All my other cars are older carb'd V8's, so it was my thinking I shoudnt have more than 28 degs timing on the LT at WOT.
RobZL1, you're spot on - our EU95 is equivalent to your US 91 and our EU 98 (super) octane = US 93 octane. Am I right in my thinking a stock ZL1 would run fine on US91/EU95?
I should have given more colour on the issue. Cruising at 50/60/70 the car is perfect (it's got 4k miles on it anyway!). Its only when I give it throttle (not quite WOT) it breaks up, power cuts, I get a shudder through the car and a backfire through the exhaust. Its like as if its only happening on boost. I'm wondering is the Metco pulley upgrade causing the issue?
On one of the runs the car did throw a Knock code in one of the cylinders and the engine light on the dash.
I was thinking originally it was an octane issue so I added the octane booster to a full tank of fuel, but it didnt make any difference.
Now, the joys of living in the Republic of Ireland means I cant get the higher octane US93/EU98 gas. I do have the option of driving 4 hours and across the border into Northern Ireland to get it, but just not down here.
Anyway, I've just dropped it off to the tuner for him to do a comparison of a stock ZL1 vs the tune that's on it.
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