440 Source Head Opinions?

-
based on that screenshot, the PP 240 heads were 60HP better than the 906 heads and peak HP was the same RPM.
that is on a mild build too.

that seems pretty good. I'd also wonder if these were some pristine example 906 heads that came out of Dulcich's stash or something too. I know they do recycle alot of parts and builds to keep the content rolling out consistently...
 
cookietruck said:
based on that screenshot, the PP 240 heads were 60HP better than the 906 heads and peak HP was the same RPM.
that is on a mild build too.

that seems pretty good. I'd also wonder if these were some pristine example 906 heads that came out of Dulcich's stash or something too. I know they do recycle alot of parts and builds to keep the content rolling out consistently...
Click to expand...

It's been a while since I watched the episode but I want to say they were a pair of heads Dulcich had in his stash that he did a light amount of work on. Like light bowl/casting flash cleanup, decent valve job etc.
 
So if they were 516 would that not bump the compression up ?
Plus did the 440 source have a decent valve job ?
Not really the best comparison.
 
Stock combustion chamber on 516 heads is 84ccs. 915s are about 79ccs and Stealths are around 80cc
 
jimmer said:
So if they were 516 would that not bump the compression up ?
Plus did the 440 source have a decent valve job ?
Not really the best comparison.
Click to expand...

I think the Stealths were just untouched OOTB. My local race engine builder/machinist (Atlas Performance in Loveland, CO) has messed with those heads before, he said with a GOOD valve job (factory one kinda sucks) and valve heads back-cut it'll pick up 20+ cfm in the lower lift ranges especially just off the seat. Just what I need for a torquey truck engine that'll see towing duty with a very mild cam that only has ~.430" lift.

So in a nutshell regarding the Engine Masters test... factory iron heads were ported and flowed more than stock, Stealths were untouched but could've benefited from a valve job, and the Trick Flows were a tad too big for the engine to make good use of. IMO that explains the lower-than-expected HP increases for each head type.
 
MopaR&D said:
factory iron heads were ported
Click to expand...
They weren't ported, magnafluxed, they did have some minor valve work done, and four new valves. That's why the price was $350. I can get the specifics so you can scrutinize further,

I'd do a set of iron heads if they were that cheap. Think I'll call my local machine shop and see what they say for rates.
 
LocuMob said:
They weren't ported, magnafluxed, they did have some minor valve work done, and four new valves. That's why the price was $350. I can get the specifics so you can scrutinize further,

I'd do a set of iron heads if they were that cheap. Think I'll call my local machine shop and see what they say for rates.
Click to expand...

Guess I'm jumping in too quickly lol, I was just going off what @1968rt said.

I'd do them if they were that cheap too, have a pair of 346 castings but they're original high-mileage pieces so they need basically everything... valve seats, guides, likely new valves, springs, retainers, locks, cleanup deck mill. And I'd still have open-chamber iron heads that flow significantly less than the ported Edelbrocks on my SBM 360, fer cryin' out loud lol.
 
Rebuilt Non-906/452 Heads from Aerohead start at $499.
That’s with bronze guides, SS valves, and HP springs.
906/452’s are $200 more.

But if you add hardened exhaust seats, 2.14/1.81 valves, and the bowls ported and gasket matched...... you’re at $1137($1337 for 906/452).

Pretty easy to get up into the Stealth price range.
 
PRH said:
Rebuilt Non-906/452 Heads from Aerohead start at $499.
That’s with bronze guides, SS valves, and HP springs.
906/452’s are $200 more.

But if you add hardened exhaust seats, 2.14/1.81 valves, and the bowls ported and gasket matched...... you’re at $1137($1337 for 906/452).

Pretty easy to get up into the Stealth price range.
Click to expand...
I had arrowheads on my 413 before the stealth swap, the stealth heads are so much better imo.
 
Check out the Sidewinder Mopar heads from Marsh Performance
 
thesiren74 said:
Nope, no more money being spent on my car.
Click to expand...
Lol you say that now haha.

i wasn’t pointing to anyone in particular, just saying that I hear good things about Todd Marsh and his sidewinder heads for Big Blocks. The price is comparable to 440Source and he’ll custom build them with whatever you want. In hindsight, I wish I’d gone with those vs my Edelbrock RPMs.
 
dukeboy_318 said:
Lol you say that now haha.

i wasn’t pointing to anyone in particular, just saying that I hear good things about Todd Marsh and his sidewinder heads for Big Blocks. The price is comparable to 440Source and he’ll custom build them with whatever you want. In hindsight, I wish I’d gone with those vs my Edelbrock RPMs.
Click to expand...
12.40s is good enough for me, cheaper to run less stuff potentially breaking.
 
PRH said:
Stealth heads with the seats recut and a nice bowl blend with flow right about 280@.600 lift.

Most home ported stock heads(especially 906’s and 915’s) I’ve tested are typically in the 250 and less range.

The 280@.600 is a little more than these flowed:

View attachment 1715901405

View attachment 1715901406

On my bench an ootb TF240 flows right about 316/221@.600, and 320/225@.700 lift.
I’ve tested about a dozen of them, they’ve all been within a few cfm.
Click to expand...
Exactly what I got with my TF, OOTB was 318, cleaned up the CNC ribs, removed practically all the turbulance and went up to 324. Great heads
 
m79ded said:
Exactly what I got with my TF, OOTB was 318, cleaned up the CNC ribs, removed practically all the turbulance and went up to 324. Great heads
Click to expand...
Alright you guys talked me into it, mine are off now.
 
You must log in or register to reply here.
-

Back
Top