Quote:
Originally Posted by RodKnock
A few years ago, Jay Brown published a nice book called the FE Intake Comparo or something like that. I bought that book. So, a nice book with all the data proving the point (cast iron vs. alloy) would be fanatastic.
Also, if the result is 15- 30 HP difference then I'd argue "WTF" that's it? All this chatter for a statistically insignificant amount of HP? I'd assert HP would/should be eliminated as a benefit or positive when choosing a cast iron block over alloy.
Honestly, we have maybe a dozen owners here of alloy blocks that don't have any reliability issues and assuming the extra HP is 15-30, which to me is insignificant, then the only reasons you would chose a cast iron block is: a) price, b) you want your Cobra replica to have a vintage block, maybe correctly dated, for "originality" purposes, ridiculous and nonsensical as that concept may be and c) the desire to add 125 lbs for no apparent reason.    |
I think Brent's reply should be:
So you want to spend $2500 to loose 125 lb and consider the 30 Hp loss insignificant. At a 4:1 weight to Hp ratio a 30 Hp loss is equivalent to a 120 lb gain in weight. So your willing to spend $2500 for an overal gain of 5 less pounds to accelerate? I could use a good laxative the night before a race to achieve the same results.
I have to be honest:
The smart ass comment above was to make a comical point. Without the emoticons, it looks like I'm piling on. The point is true if drag racing. In the twisty turns, the hole 125 lb matters and you cannot apply much power in a corner. However accelerating away we're back to the 5 less pounds to accelerate thing.