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Old 02-18-2011, 07:57 AM
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screamingchief screamingchief is offline
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Join Date: Nov 2004
Location: S.E. Wisconsin
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Ahhh,it does'nt bother me in the least,most guys here know that already,so they know it's an uphill battle to really get under my skin.

The funny thing is,I've never personally had a problem running a relatively high CR combo on pump gas,no matter what make engine they may have been.

My first "hot rod" was a 396 with 10.5:1 CR,that engine was in my '70 SS nova clone,and that thing never saw drop one of anything but pump gas,and it did'nt have any detonation related problems the entire time I owned it,nor afterwards by the reports I got back on that car.

And I've tuned more than a few high compression pump gas pontiacs too.

So I dont really look at this issue as a brand specifc sorta thing.

The real pisser is the fact that I've never once in any of these CR threads said that a high CR absolutely cant be done on pump gas.

I know tons of guys who run 12:1 to 13:1 CR race engines on pump fuel when they are'nt actually racing them.

But the fact that I still wont come on here and suggest that everyone who asks about this has to do that seems to be a bitter pill for some here to swallow.

I usually just explain that in my days as working as an auto tech and doing side work & such,I've run into plenty of folks that have had their share of problems doing such.

And @ times I also go ahead and express my personal opinion that,for the most part,I dont feel it's absolutely necessary to push the CR envelope as hard as some here feel it should be pushed.

But that seems to make some guys here get all foamy @ the mouth & such,and then they start slinging the insults and derision in my direction,and then things tend to go downhill fast from there.

Like it's a crime around here to have a slightly conservative opinion on a given subject such as this.

The average car guy is just that,average,they're often not expert tuners,and they may not even be genius cooling system engineers either,for them every little detail item they may miss or skip leads them that one step closer to less than stellar results when pushing the limits like others seem to have no problem doing.

I mentioned the genII LT1 transplants,those are a pretty good example,guys around here used to like to get themselves a low miles junkyard pull-out and throw the GMPP LT1 carb intake and a HEI in there and think they're done,but much of the time they'd have absolutely no idea that a fair amount of additional work is needed to adapt their car's old cooling system to that of the modern engine's cooling system,so they miss the boat there,and guess what happens,they cant get the thing to stay cool,and it runs like $#! cause they saw nothing wrong with throwing a box stock one of those junk @$$ 1850/600 cfm holley or edelbrock carbs on there and a mystery HEI with ???? advance curve in it.

So then you gotta fix the cooling system shortcomings first,iron out the timing curve next,and then get the fuel curve tuning nailed down.

After that they usually were'nt too bad @ all,and the upside there was you did'nt have to mess with the optispark junk anymore.

But with those deals most guys did'nt even know which was the inlet or outlet hose for the LT1 engine,and they're usually completely clueless about what to do with the steam lines or such,and the first thing they'd do is pitch the surge tank,and that's often a big mistake unless one takes some specific measures to account for that,see the LT1's reverse cooling systems were'nt as simple as some guys like to think they were,there were some hidden little tricks to that cooling system beyond just changing the direction the water was flowing.

Anyhow,I really dont care what CR any of ya'll use from here on out.

Swim @ your own risk.

And dont try to blame me if you drown.

Bret P.

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