I actually like the idea of a max lift rule, but there are ways to get around the rule, rocker ratio being one, along with pushrods, valve lengths...
As for 9:1 - that definitely helps reduce power 'options' but it's not impossible to make big power out of a such an engine. The more money you spend, the more power you can potentially make. Before the advent of cheap belt superchargers guys with little money found ways to make drag racings engines run @ 9:1 and make well over 400 HP and keep it in one piece on a low budget - all that with a 600 CFM carb and dual plane manifold (Okay so it was 1st gen split dual plane - but who's looking....)
And hence the crate engine was born....yet another debate that's already been written about more than we all want to hear about...
As for costs, one thing is for sure, Isky has never complained about how many SL1's / SL2 they've sold over the years 🙂
does the SL1 cam have to be at 0 degrees or are there any tips on advancing if that's something we can do?
ok let me re phrase lol obviously this is a circle track post, so superchargers are not even considered, and with a 500 2 bbl and such there is only so much that can go in, and soo much out... Steeve stick with a good SL1 and find power elsewhere, the cam is almost a non issue with how sticky things are. What heads you runnin? can you get better flow with something else? exhaust manifolds? Carb? Intake? these are the first places to look. As well how bout your bottom end? a good bottom and doesn't build alot of power, but a bad one will rob it....
does the SL1 cam have to be at 0 degrees or are there any tips on advancing if that's something we can do?
There is no rule (as far as I know) about how you set your cam. The reason I suggested you degree your cam is for accuracy. Advancing or retarding the camshaft depends on the components used. Valve sizes, heads, and gear selection. Advancing or retarding a cam also impacts ignition timing (and vice versa) for best power.
The best way to start is to run it 'straight up' (zero degrees) and then try somethings. If you feel you're losing to the competition down the straightaway, you may consider advancing it two degrees. If your getting creamed coming out of the corners, retarding it two degrees might be something you want to try.
And that's just the beginning...
ok let me re phrase lol obviously this is a circle track post, so superchargers are not even considered, and with a 500 2 bbl and such there is only so much that can go in, and soo much out... Steeve stick with a good SL1 and find power elsewhere, the cam is almost a non issue with how sticky things are. What heads you runnin? can you get better flow with something else? exhaust manifolds? Carb? Intake? these are the first places to look. As well how bout your bottom end? a good bottom and doesn't build alot of power, but a bad one will rob it....
Hey - LOL I said BEFORE the advent of superchargers.... sheesh! LOL 🙂 🙂 🙂