340 stroker cam

Sprayin73 said
Yes .80 is his overdrive 4th gear, most who run that trans trap in 3rd, or 1:1, not 4th, that was my implied question stating that I assumed he’s in 1:1 or 3rd. Rumble fish, I’m spot on using premium pump gas. Opinions are like buttholes everyone’s got one. It’s up to him and his intended use in the end after all. He asked the question, I answered to the best of my knowledge to maximize efficiency.

rumblefish360 said
Your point of view is more of the drag strip and not a double duty or a car that runs the street. Otherwise, I’m with you.
You say your spot on with pump gas and I’ll disagree because of this one very factual point, pump gas quality varies. With that, why push it? If you can get it, GREAT! Then comes the day you get crap gas.....
Also, not to be a dick, but the “a implied question” should be directly asked. It eliminates confusion or a misreading.

Your words here “Opinions are like butt holes...” sounds defense, don’t be. I’m not attacking. Just sayin, just incase. I’m not here to challenge. Just here to talk and enjoy.

It’s interesting this discussion on CR and fuel requirements.

I don’t quite agree with sprayin that he needs LESS cam...but I certainly agree the OP could use more CR.

As far as pump gas goes, other than ethanol content the regs for premium pump gas are pretty tight. The lower grades are pretty loose. They can use a ton of fillers and crap, where premium pump fuel can’t.

I’ve been beating the higher than “normal” pump gas compression ratios since I was just out of high school. Since I’ll turn 40 here in a bit (inside joke) you can add up the time.

When you get the CR up, and the cam timing correct for the application. The engine is far happier, easier to tune, cleaner and just far more enjoyable to drive.

But, you can’t just slap some crapola together and make it happen. And, as you say...you have to consider the application. If you are pulling a trailer and have 3.08 gears, likely anything over about 9.8:1 is going to be an issue.

For the guys who are willing to use a systems approach, 12:1 on premium pump gas is quite easy to do. Also, I always like to mention how important expansion ratio is, and how much it is ignored. ER is a byproduct of CR. Ignoring ER makes the engine less efficient.