4-valve v's 2-valve heads

[Billzilla]

631ft-lbs @ 5100
745 @ 6300rpm.

[Billzilla]

627ft-lbs @ 5200rpm
753hp @ 6400rpm.


Yeah the original test was to keep the grunt down to around 600hp or so, and have a fat torque curve. We wandered a tad.
Yeah I can get the valves in no probs.

[TK]

625ft/lbs 5500rpm
740hp 6500rpm

Agressive solid roller cam, still the same off the shelf heads, still pump 98

[TK]

We gonna call it pretty much even?

I'll concede that the 4V does have a slight advantage in power delivery, you'd better concede that mine can be built with existing parts at a reasonable cost & will be more compact.

[Billzilla]

Hmmmm I'm thinking we should perhaps be using the same program to make sure we're on the same page.
What are you using?

[Billzilla]

We gonna call it pretty much even?

I'll concede that the 4V does have a slight advantage in power delivery, you'd better concede that mine can be built with existing parts at a reasonable cost & will be more compact.

Seems fair.

I don't know why the big engines don't get as much benefit from a 4V head as the small ones do though - if anything, it should be the other way around.

[TK]

Engine analyser pro.

I figure you're using the same.

[TK]

I don't know why the big engines don't get as much benefit from a 4V head as the small ones do though - if anything, it should be the other way around.

Yeah, it would seem that should be the case, but in real life it simply isn't so.

I ain't gonna try to match a 4V 1600cc 4-banger with a 2V tho, I'd get smashed.

[Billzilla]

Yep. Version 3.3
We should swap files ... ?

[Billzilla]

Yeah, it would seem that should be the case, but in real life it simply isn't so.

I ain't gonna try to match a 4V 1600cc 4-banger with a 2V tho, I'd get smashed.

Yep, here's the next road engine I'm building.



A mate in Europe has actually built almsot exactly the same engine and it makes 248hp at the crank.

[TK]

Yeah, ok, but I gotta figure out how the hell to find the file in order to send the damn thing.

Outta time, I'm 1/2 way to being screwed for the day now, gotta go finish machining a 350 chev & start popping a 4L for back together.

Ah, crap, why am I so easily distracted?

[edo]

So as long as your dinosaur donk is big its just as cool as a new fangled big un?

Now get back to work on my donk TK

[Billzilla]

Yeah, ok, but I gotta figure out how the hell to find the file in order to send the damn thing.

It should be somewhere here ->

......\ean pro3\Users Total Engine Files\....

FWIW here's the 32v LS7.
http://www.billzilla.org/temp/LS7 DOHC

[TK]

Cool, I'll find it - but I'll send a new one.

Just switched to an 8 deg style chamber:

772hp @ 6500
648ft/lbs @ 5500

I'll send you that one.

[TK]

Ok, got the file, but can't do an attatchement using PF's email function, send me something & I'll shoot it over.