Which to build?
I am looking for around 700 hp out of my R3 11.5 440 cid 4.25 stroke crank, Hydraulic cam 230 CNC indy heads.
Is it possible or do I sell everything and and start with an aluminum G3 4.25 stroke apache head hydraulic 450 cid 11.5.
I have 3 sets of G3 heads first generation 5.7, eagle and apache .
Selling my Indy stuff would get me an aluminum G3.

i know the 6.1 head can reach the 400 cfm range on a stock valve.

the apache ca hit the 430-440 range also. more than enough i think for that power level.


steve

I am going to guess that 700 is pretty optimistic for a hydraulic cammed 440 unless you are into power adders.
It would take compression and great heads to get close and even then I don't think it would be attainable.
I know nothing about Gen III stuff , so I'll leave that one to those who do.
I might be close with my 405.....I'll find out soon enough.
But that is a solid roller , W-9's and 12-1.

The 392 production motor is already around 500 hp. What would be so hard to make a 426 or 440 stroker make 700 hp? The Apache heads flow great out of the box. Cubes, compression, cam...stir it up, add some race fuel.

Do the 3g hemi. It will get there easily with the hydraulic roller and you will be more than 100 lbs lighter.

I don't have anything near 700 hp, but if I were starting over I would build a 3g. The heads are amazing for the money, everything else is pretty much a wash ($$) with the exception of good rocker gear.

I think either would be cool but if it was me I would build a hemi. The parts seem to be alot more reasonable overall.

Rod

The only potential obstacle to reaching 700 h.p. in either case would be the hydraulic cam.......I am assuming we are talking N/A.
Probably easier with the Hemi I think , so if you can cash out of the parts you already have , it makes sense.

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I agree,the heads will do it with the right combination.With a hydraulic it will take getting everything scienced out to a higher degree to make it work. A lot of compression and a big solid roller make things easier,that is why most people go that route,IMO.
Keith

sound like you got 700+ with our LA stuff you might need a soild roller thought. who makes a solid roller for a late hemi. 700 hp is alot to ask for from a non solid cam ?? just saying

remember that 340 rick just made 580 at the wheel on his ride. thats a 426 car with a hydraulic cam. add in a 18 percent dt loss and thats right around 680 crank hp...on pump gas

steve

i cammed shafi keislers car. it made in the range of about 575 at the wheel. with not a whole lotta cam

A 440 ci 11.5 comp R3-LA with your 230 Indy's will more than likely come very very close with the right camshaft. At those cubes a hydraulic roller will not give up ANYTHING to a solid roller (due to the rpm range) . Why don't we just call Johnson/Hylift and order up some of their way cool short travel drop in hydro-rollers and think long and hard about the valve events. Your intake will need attention. I recall your previous 416 made well over 600hp (at a similar comp ratio) with those heads so it stands to reason that with more cubes that 700 hp is more than possible. I say build since you have a lot of the components already--and sell it if you still want to explore the 3g Hemi. J.Rob

I would try and go the route of the new hemi, they just seem to be awesome motors...Nothing wrong with LA's, but it seems like the Hemi's have the head foundation (and blocks too) to make gobs of power for alot less work and money than any LA would take.

I think the toughest thing would be having to sell the LA stuff you have and make up enough money to fund the Hemi. I say go for it though! I'd like to do one myself someday as you already know

Good luck man! And if you start a build on one, keep us posted how it goes!

Matt you've been all about the Gen 3 hemi for long enough to where I can't imagine you doing anything anything else.

If all the LA stuff was up for sale reasonable enough, I'm sure it'd be sold in no time.