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chrisbalich chrisbalich is offline
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Join Date: Dec 2017
Location: noblesville, IN
Posts: 3,604
Garage
Quote:
Originally Posted by shoooo32 View Post
Two thoughts - I forgot you're 10:1 CR so my 9.5:1 91 octane experience may not be applicable. Definitely bring octane boost.

Regarding oil, road trip miles are easy on aircooled engines. You're going 700-1000 miles per day with only one or two cold starts so the oil stays relatively clean. 5k miles is no big deal.
Definitely taking octane booster.
VR1 is en route. As clean as it looks at 3k of beating on it, I'm sure it'll be ok with 5k of mostly freeway.

Quote:
Originally Posted by Focker View Post
I can't comment on the spark plugs, but I used the VP Octanium additive with very good luck on my racing motorcycle. That was a 12.5:1 pistons with milled heads. IIRC we were just over 13:1 compression.

https://vpracingfuels.com/product/octane-booster-vp-octanium/?c=367&

Didn't have detonation and that was on a carbureted bike.
Thank you. Good info. I ordered 104 branded octane boost. We'll see how it does.

Quote:
Originally Posted by ryanjboutin View Post
I'm at 9.5:1, the same spark plugs, and the same oil.
I'm currently running a full tank of VP110 (available on tap locally) and it's good, reliable power, no knocks or anything.

Maybe adjust timing or use a colder spark plug for the trip?
That way you're not fumbling with bottles or worrying about your octane levels when traversing the Rockies and there are no octane boosters available.

Just thinking aloud.
I don't want to make an entire timing map for this trip if I can avoid it.

Quote:
Originally Posted by shoooo32 View Post
The rockies aren't a concern - at 3k ft elevation, the car is making 9.2:1 compression. At 6k ft, it's making 8.4:1 compression. At 11k, you're just glad it's still running.

California (specifically the central valley where its a zillion degrees and 300 ft elevation) is where I'd toss a bottle of octane boost in.
I'm still going to have an ear out just in case.

Quote:
Originally Posted by fanaudical View Post
My personal opinion is to stay with the VR1 on the trip and try Motul when you're closer to home. A long trip usually isn't hard on the oil (comes up to temp and stays there). I think you'd rather be near home if one of your seals finds it doesn't like the Motul...
The seals are something I hadn't considered. That's an excellent point.
Going with VR1 for this trip.
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Old 09-03-2023, 11:31 AM
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