scream'n SBM head choice

Posted By: chrisnben

scream'n SBM head choice - 02/21/14 09:06 PM

Hey guys- looking for some input on head choice and what people are running. It's been a LONG time on a LA build for me. Putting together a 340 street/strip (OK- a strip car with turn signals

and looking at a set of ported W2's & victor intake VS some Eddy RPM's run through a CNC porting job.
RPM range 3000-7500; 727 trans; 4.10's; not sure on cam yet-probally Comp XE 285/545 range
Any thoughts on the two?

Posted By: MR_P_BODY

Re: scream'n SBM head choice - 02/21/14 09:20 PM

Depending on the port job on the W-2s.. but they will
flow more if done right... BUT they are iron so thats
40# more on the front end... so basically its a wash..
I run the W-2s on my Rampage and its in the 580 hp
range for a street/strip mainly street... but I'm
still looking to get my W-5s fixed to use them... also
I'd look for a better cam.... JMO

Posted By: chrisnben

Re: scream'n SBM head choice - 02/21/14 09:54 PM

Mr. P, yeah the 40# is some weight, but currently she's got a RB in there all aluminum except the block- so roughly about the same as the LA iron set-up. I have to buy headers either way, so yes it is a wash.

Any good cam recommendations? What's in the Rampage?

Posted By: MR_P_BODY

Re: scream'n SBM head choice - 02/21/14 10:16 PM

Quote:

Mr. P, yeah the 40# is some weight, but currently she's got a RB in there all aluminum except the block- so roughly about the same as the LA iron set-up. I have to buy headers either way, so yes it is a wash.

Any good cam recommendations? What's in the Rampage?

The cam I have in the Rampage is a old MP roundy round
roller that I had laying around the shop(that whole
engine is just shop junk except for the lower compression
pistons).. but its a 260/270 .640/.640 with a 105 lsa
installed at 105... this is a 416ci

Posted By: pittsburghracer

Re: scream'n SBM head choice - 02/21/14 10:20 PM

Your best bet is to decide on what heads you are going to run and get some flow numbers at every .050 BEFORE starting to decide on a cam. Flow and compression ratio make cam choose a lot easier and is the right way to go about it. Converter stall also is a big player.

Posted By: chrisnben

Re: scream'n SBM head choice - 02/21/14 10:27 PM

Quote:

Your best bet is to decide on what heads you are going to run and get some flow numbers at every .050 BEFORE starting to decide on a cam. Flow and compression ratio make cam choose a lot easier and is the right way to go about it. Converter stall also is a big player.

yep- you got it. What's the good word on rods for a 7000 rpm 340 these days?

Posted By: MR_P_BODY

Re: scream'n SBM head choice - 02/21/14 10:30 PM

yep- you got it. What's the good word on rods for a 7000 rpm 340 these days?

I use H-beams in all my junk... I bought a few sets
of Eagle H-beams years ago and they've great in my stuff

Posted By: Leon441

Re: scream'n SBM head choice - 02/21/14 11:08 PM

Sense you are changing everything. Headers bell housing etc. And you want something that will scream. You really should look at a R5P7. The cost would turn out roughly the same. You can run an adapter between the engine and your big block transmission.

Leon

Posted By: chrisnben

Re: scream'n SBM head choice - 02/21/14 11:12 PM

Quote:

Sense you are changing everything. Headers bell housing etc. And you want something that will scream. You really should look at a R5P7. The cost would turn out roughly the same. You can run an adapter between the engine and your big block transmission.

Leon

what's the brand and is it cost effective for an adapter?

Posted By: qwkmopardan

Re: scream'n SBM head choice - 02/22/14 12:39 AM

What's the good word on rods for a 7000 rpm 340 these days?

If you have not already bought a crank you can get one with 2.100 or 2.000 rod journals. BPE and callies make them. Then you can get 6.125, 6.200, 6.250 and even 6.300 length rods, with sm. chevy big end and pin dimensions. Plenty of good rods out there. Wiseco, diamond and others have shelf pistons with .927 pins and will do one change to the piston for $5 a piston. That way you can put the longer rod in and have a shorter lighter piston.

On the cyl heads, there is a new one out, and I believe in stock now called Airwolf, flows over 300CFM, and uses ordinary LA parts. There has been lots of talk about airwolfs on this site.

Posted By: Triple Threat

Re: scream'n SBM head choice - 02/22/14 12:45 AM

There is a set of W2's with intake and rockers in Race parts for sale for a really good deal. FYI

Posted By: viperblue72

Re: scream'n SBM head choice - 02/22/14 07:18 AM

I would not run a hydraulic camshaft!!! And in my opinion, any cylinder head that gets rid of the pushrod pinch is going to have more potential. Therefore I personally believe the w2 has more potential for more horsepower.
But I also think that a ported edelbrock is plenty for only 340 cubes, and is going to make more midrange torque, be lighter, and have better combustion chamber. And personally, with only 4.10 gears and a somewhat tight converter that you plan, I feel the edelbrock may work better, due to the smaller intake port for better air speed and torque.
There is also the Indy ta head that is a edelbrock that the pushrod holes are moved, and they use a 440 rocker system and factory intake and header patterns.

Posted By: RAY1969CARS

Re: scream'n SBM head choice - 02/22/14 09:08 AM

Quote:

Depending on the port job on the W-2s.. but they will
flow more if done right... BUT they are iron so thats
40# more on the front end... so basically its a wash..
I run the W-2s on my Rampage and its in the 580 hp
range for a street/strip mainly street... but I'm
still looking to get my W-5s fixed to use them... also
I'd look for a better cam.... JMO
[/quote

What happen to your w5 ????

Posted By: Crizila

Re: scream'n SBM head choice - 02/22/14 03:34 PM

Fully ported Edelbrocks from Hughes. Advertised to flow .299 @ .700. You can use all stock valve train and exhaust stuff.

Attached picture 8049063-eddy5.jpg

Posted By: Crizila

Re: scream'n SBM head choice - 02/22/14 03:35 PM

chambers

Posted By: MR_P_BODY

Re: scream'n SBM head choice - 02/22/14 04:03 PM

Quote:

Quote:

Depending on the port job on the W-2s.. but they will
flow more if done right... BUT they are iron so thats
40# more on the front end... so basically its a wash..
I run the W-2s on my Rampage and its in the 580 hp
range for a street/strip mainly street... but I'm
still looking to get my W-5s fixed to use them... also
I'd look for a better cam.... JMO
[/quote

What happen to your w5 ????

They were leaking oil into the cylinders big time..
a qt every 35 miles... I finally put my W-2s on and
the issue went away.... when I get back home I'll
take a look at them to find the problem

Posted By: chrisnben

Re: scream'n SBM head choice - 02/22/14 04:50 PM

Quote:

What's the good word on rods for a 7000 rpm 340 these days?

I did the same thing on my 440 stroker with the .927 pins & SBC big ends on a custom Ross piece. Man, together they weigh just over 1000g! That engine really wraps up fast for a 489. I probally will go with the same set-up on the LA bottom end.

As far as the heads, well I might just grab those W2s for sale here and save $1500. over ported Eddys, Indys, Airwolfs, etc. Not to mention the W2s come with HSharp rollers and Victor intake.

Posted By: MR_P_BODY

Re: scream'n SBM head choice - 02/22/14 05:01 PM

As far as the heads, well I might just grab those W2s for sale here and save $1500. over ported Eddys, Indys, Airwolfs, etc. Not to mention the W2s come with HSharp rollers and Victor intake.

Sounds like a good package

Posted By: 1967dartgt

Re: scream'n SBM head choice - 02/23/14 06:44 AM

Quote:

Quote:

What's the good word on rods for a 7000 rpm 340 these days?

If you have not already bought a crank you can get one with 2.100 or 2.000 rod journals. BPE and callies make them. Then you can get 6.125, 6.200, 6.250 and even 6.300 length rods, with sm. chevy big end and pin dimensions. Plenty of good rods out there. Wiseco, diamond and others have shelf pistons with .927 pins and will do one change to the piston for $5 a piston. That way you can put the longer rod in and have a shorter lighter piston.

On the cyl heads, there is a new one out, and I believe in stock now called Airwolf, flows over 300CFM, and uses ordinary LA parts. There has been lots of talk about airwolfs on this site.

Now spend some of that money on a good head porter and be way head of the game.

Posted By: viperblue72

Re: scream'n SBM head choice - 02/23/14 07:35 AM

I still think the w2 head is the best bang for buck if you don't already have headers, intake, etc.
I don't think you will go wrong with that deal.

Posted By: Leon441

Re: scream'n SBM head choice - 02/24/14 02:02 AM

Quote:

Quote:

Sense you are changing everything. Headers bell housing etc. And you want something that will scream. You really should look at a R5P7. The cost would turn out roughly the same. You can run an adapter between the engine and your big block transmission.

Leon

what's the brand and is it cost effective for an adapter?

Mopar/Dodge NASCAR engine. Mopar block heads intake water manifold. The adapter plate and flywheel adapter runs anywhere from $500-950. More are to come. My designer is tied up at the moment.