I had some experience in this with mine. It tends to cause knocking and the sensor picks this up. It will compensate and you will experience rough idles and periods of unconsistant idle rpm's. That is my experience, it may be different for you. I might of just had bad gas that day too so you never know.Loud 93 STS said:I have a place where I can get 105 and 110 octane gas for just about the same price as 93. Is this too high of an octane rating for the Northstar? I was thinking it might be a bit much. Just wanted more opinions.
Dave FYI you can get 93 and 94 and sometimes 96 i think for the same price or cheaper than what is "around" the are per say. Go up north i find limeric to be cheap, bethlehem, qtown, etc... also some of the far out gas stations do carry race fuel and its cheap b/c hill billies like dem old carsDaveSmed said:Where do you get this gas from for the same price as 93? Shame that it's unleaded, but oh well.
I have never put anytthing higher than 94 in any of my personal cars. I can't see the logics behind putting something else in. If it were THAT much better it would be at gas stations all over.zonie77 said:Where are you getting this gas?
Av gas is rated somewhat differently but is still higher octane. Av gas also doesn't correspond exactly to automotive gas as far as addditives and spec gravity.
If it's av gas it normally runs OK but if you modified carb and timing it didn't give exactly the same results.
The benefit of high octane is resistance to knocking under high compression. No real benefit in lower compressions than max. So if 110 octane supports 12:1 not a lot of benefit if your running 10:1. Higher octane gas burns slower which is the reason you advance the timing. It doesn't give you more power unless the engine is built or tuned for it. In automotive applications you might get a better detergent package with premium gas.
Let us know.