quote:
Originally posted by Pablo:
Patman - these guys with carbon - what fuel and what oil are they using? I am certain that some engines carbon much more than others.
That's just it, the people getting carbon buildup are from all over the country, running all different oils and all different fuels. The carbon buildup probably happens faster in the LS1s, which tend to burn a lot more oil than the LT1. But the LT1 engines have also been around much longer, so there are more of them with 100-200k or more, and these guys who do the Seafoam carbon cleaning procedure seem to notice the most difference in performance after it's done.
Who knows, maybe these guys are imagining a bigger performance gain than what they really are getting? I do know they see a ton of smoke come out the back when they're doing the treatment, however it could simply be the chemicals coming out, not actual carbon being blasted away. Many report drastic improvements in throttle response and engine smoothness when they're done. SOTP reports are so hard to go by though.
In the case of my own LT1 Firebird, it's got 90k on it, and I seriously doubt it's got any carbon buildup on it, otherwise it would not run as strong as it does in the quarter mile. It's two tenths of a second quicker than the last 95 LT1 that I had, and I had that other one from new. So this car at 90k has more power than the previous one when brand new (actually, my best time in the previous car was recorded at about 10,000 miles, so the car was fresh, but fully broken in) This one I own now runs the quarter in 13.74 seconds at 100mph, while the other ran it in 13.94 seconds at 98.8mph (and in colder weather too, so actually the one I have now has the potential to be even quicker) It's very rare for a bone stock LT1 to run 13.7s in the quarter mile, which is one of the reasons I know my engine is in perfect health.
I figure the addition of Neutra to my tank, along with Auto-rx in the oil, is responsible for my engine being in such good shape, and obviously still making full compression.
So I'd like to keep my engine in as good of a shape as it's in right now, which is why I'm trying to determine at what rate I should do the Neutra treatments. I don't want to do overkill and use up my supply too quickly. (and as mentioned, I'm getting tired of adding it to every single tankful, thus the decision to add bigger doses at less frequent intervals)
