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Owner commissions a rebuild on a 340 that vibrated itself to death, and then the owner dies before it's finished. .030" overbore, stock 3.31 stroke for 344.5 ci. Custom solid flat tappet, 9.3:1 compression, mildly ported factory iron 'O' heads. 402 lb-ft @ 4,500 rpm & 411 HP @ 5,800 rpm.

I figure there is no production run head that should be installed right out of the box. So then, what happens if you prep a set of Stealth heads? You know, strip them, inspect all the parts, flow test them OOTB, check guide clearance, check valve roundness, back cut the valves, set the valve...

Finally getting close to dyno time.........will start it with the Victor intake, go to the dual plane RPM and then the 6-Pack. Should be ready Monday afternoon. The Hemi blew the servo seals on the dyno because the dyno operator kicked full throttle in too quickly. No names but his initials...

448/440 we just finished, for I believe a '72 Satellite. 572 lb-ft @ 3,800 rpm and 593 hp @ 5,900 rpm .040 over factory '72 block 10.6:1 running on 91 octane 950 Quick Fuel Edelbrock RPM Performer dual plane Victor cylinder heads prepared to flow just like the Trick Flow 240 CNC heads...

So, while everyone is waiting for those inexpensive TrickFlow heads. Here are some 84cc RPM 440 heads we are finishing up. They still need to be cc'd, finish milled and assembled. Lift.................OOTB IN/EX 2" EX tube.................Ported...

What I like about it is the little POS never gives up. Yep, 91 octane pump gas. RPM...........TQ/HO 3000........450/257 3500........484/322 4000........499/380 4500........545/467 5000........557/530 5500........534/559 6000........510/582 6100........504/585...

There has been a swarm of earthquakes here in Challis, ID and supposedly the epicenter is near a small shop off Round Valley Road. The geologists have been pounding on the door today and we still have to dyno the 505 soon. If there is a volcano I suppose we'll get the blame for that!

Turns out she's going to be 8.9:1 compression, .030 over 440 with the new 346 heads substituted for the 452 heads Pop ported and used. With his 452 heads, 2.14/1.81 valves and a 260H cam, the 440 made 404 HP @ 4,800 rpm and 483 LB-FT Torque @ 3,400 rpm. Now we're using a Comp XE285HL and...

I'm switching this over to it's own thread from the 440 Source head thread. There has been a recent surge in curiosity about the power you can get with rebuilt factory iron heads. We've a dyno day coming up at our shop to introduce the people around here to the advantages of an engine...

After struggling with oil return and oil pans we were finally able to dyno the Hemi and hand it to the owner. It is heading for it's home in a 1969 Road Runner that was featured on the cover of Hot Rod Magazine in 2009. The idea was to have something that was reliable and would run from it's...

My son and I had a pretty good laugh when we first saw the new iron 360X head a few years ago. Now we've had a real good belly laugh over the factory Magnum head. We have been asked to build a '96 360 for a truck. The plan is to use the stock heads so Cody went to work on them. Using a maximum...

So now do we have a new weapon for the low compression big block? Edelbrock is now advertising a 75cc combustion chamber E-Street aluminum head for the low compression engines. Is this a good alternative to the 915 that is getting harder to find? They are listed on Summit Racing's website for...