Compression

IDK about this. While I have read a few things on this topic, I don’t bother to retain it since I’ll not be going there.



In the area, yea, that’s about right and a good average number to use.




Yes! This is what I discovered years back. There is that thinking split, that I don’t argue with because at a certain point, if the head is to large but yet still makes the power, I don’t think it’s a driver in most anyway one would think of but more of a narrow range build designed for 1 thing rather than all things or a small amount of flexable things.

So, depending on what you’re after….. someone’s wrong!


Fixed LOL

Yep

Agreed

Possible. Enter in the rest of the package….


Yeeeeeeaaa, cost aside…. The sbm head market could use a few extra choices. I don’t think it’s bad. I’m not aware of a max output W9 engines potential or what has been achieved already.

I’ve seen Brett M’s 1,000+ dyno pulls. I’m not always aware of there CID though.

Aside from throwing money out the window without care or concern of how much is flying out the window. 99.9% here are limited budgets and most are flexable builds. - AKA - Strett Strip & at most.

A 360 @ 1.8 = 640+ HP, that’s a bit optimistic for most people and land in a strip build, not that it isn’t drivable in the street, though that depends on who you are and willing to tolerate.

Since a buck has to do with the cam size needed to achieve such levels, it’s probably going to be a bit much for the average fella here. I’m not even that big of a fan of a Hyd. @ 248@050 for an everyday driver. Power wise, with ported 2.02 J heads, it was a fun ripper in the street. I wasn’t a fan of it everyday commuting in and out of NYC on a 80 mile round trip through bumper to bumper traffic and a heavy MP clutch. No Sir, No Fun.
Kate night in the back alley industrial parks, whooo, thumbs up baby!

This head/cam/power part of this thread is fine and the compression needed to effectively run a whatever size cam is good but may get carried away in a weird direction. (AKA-Race)

I think the bases are well covered here. AJ, 33IMP, etc… have really good posts and examples.


IMO, bringing up what is possible in head flow and stating that 1.8 is what you see on a 10-1/10.5-1 engine to me means the cylinder head is letting a big cam work to its best and it pushes the thread into racing talk. (Again!)

It bothers me that you bring it up so nonchalantly as if it’s done all the time with ease. You’re often pointing your finger to a video as proof. This is not the everyday engine build or occurrence. It’s actually a high goal to achieve 650hp on a 10-1 engine. This is not everyone’s desire or goal.

When you get there, I look forward to your build though.

Were you planning on anything unusual? Or odd?
Lightened cranks, over a 416 stroker or greater than a 4.00 like a 4.18 crank stroke?
Race block or stock block?
I meant an average of 1.8 hp per cfm, Eg.. a set of sbm trick flows heads seem to generally fall in low to high 500 hp so 1.7- 1.9 hp per cfm, I'm imagine some more race oriented setups getting the 2+hp per cfm out them. Same with other heads and combos from what I've observed so far.

So I guess point is (if I had one :) ) if something like 2.5 hp per cfm is max effort and 2 isn't seen too often on a street type engine and a low non performance stock type engine is probably at least 1 hp per cfm and a decent street strip engine is around 1.7 to 1.9. Guess leaves 1.1 to 1.6 hp per cfm for general average performance street type engines.