SS MPSTR

Fact are straight and your question was answered. Yes the chamber is smaller, and the cam is the same 'size' fwiw. Let's see what the car runs at the track

Let's not forget either that a stock intake went back on, and the package provided by the LE/BRE team was 'tailored' to his stock shortblock, (they all are, as they have repeatedly touted on this board). AI provided their product, advice and similar cam, and got better results. Call BS all you want.

tireburnin

Lol yes the canton pan is worth exactly 10-15rwhp on a 400rwhp car! My Canton pan is a piece of **** and the only decernable power it gave is the power to leak oil everywhere the car goes.

dangalla

ok so your admitting that any comparison must be skewed due to differences-correct, although i must have missed that info or confused it for intake runner size

its simple - smaller chamber = more compression = more hp

had both chambers been the same then it would be a fair comparason

SS MPSTR

Wasn't it obvoius that the smaller head made more power, or did I miss something? How much do you think it affected the compression? Say it was 0.2 points increase, how exactly does that translate into power, especially with an unported intake? If it is that simple of an explanation, why didn't LE do the same? Do they not want their customers to maximize their 'investment' or results? Their profit was maximized, why weren't the results?

speed_demon24

I can garuntee you the oil pan is not worth 10rwhp, and lets not forget the little fact that I put in a new oil pump with a high pressure spring that's eating up more power than the old stock pump. I'm also running 40 weight oil now compared to 30 weight so I know that's eating up more power than before, but I don't want to post every little exscuse out there. Or the fact that I went from a ported intake manifold to a stock unported intake manifold. And the cam isn't larger than my old one. The cams are nothing alike but my new one isn't larger.

T/A lt1

Well we dynoed 18+HP on an engine dyno so I know there is a difference now on the oil pressure spring i think you need to ask someone about that but do you now need a shortblock?

dangalla

do me a favor, show me where in this thread it states the difference in size, you stated here that it was smaller, but how did you know that. if it is a nominal diff then i retract my previous statement

dangalla

your not gonna lose anything worth mentioning bumping the oil pressure a little, and straight 40 weight, thats what you run

SS MPSTR

https://www.camaroz28.com/forums/sho...2&postcount=57

apology accepted

dangalla

18cc is a pretty big diff. and that will bump compression a good bit, are you sure he was not refering to intake runner volume

and just to clear this up - i am not taking sides, i am not arguing just to argue, i am just wondering a few things before i make a decision as to weather or not this is a valuable comparason of company b vs c

and again great results speed good luck with it

SS MPSTR

You know, that's a good point to note - I don't know. Maybe Robert can chime in on this. I'd have to figure that the AI set has got to be within 1cc or 2cc of the stock chamber size (and the LE offering) and it's the runner size that is smaller.

tireburnin

18cc has to be intake runner volume. I don't think you could possibly mill a head enough to cut that much out. AFAIK, the difference is minimal at best. My heads came out to be right around 1 cc smaller. They milled the head for flatness and better gasket mating. Nothing substantial on my heads and I would assume the original posters heads are much the same way.

Even if he changed to thinner gaskets (which he didn't claim to have done) the change would be less than half a point. Probably closer to .1 or .2 without doing the math.

speed_demon24

Um its the runner size thats that much smaller. If the chamber was 18cc's smaller I'de be running 15:1 compression. The chambers should only be ~1cc smaller than my LE2 heads which is worth 2hp tops.

dangalla

thats what i figured, and why i was confused, so would i be correct to assume the intake runners were almost 13cc over the advertised volume(on the previous heads)

speed_demon24

Yep. My car had nothing below 3k with the old setup. I was bogging to a 1.9-2.0 60' at the track with a quick slip of the clutch at 4k on nittos.