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Or rather.....Correct Rocker arm geometry collateral damage. The things you learn about rocker geometry after spending money on what looked like great stuff. I'm attempting to clean up a few things and then go on to time the cam in the 540. So I took the Indy EZ heads off and the cam out of...

I grew up with my dad porting these heads in our garage in 1959. I've never run a stock unported iron head in one of our cars, that I can remember, since that time. The guy down the street was grinding the base circle off his cams on his bench grinder to get more lift and going a little faster...

I had to pull the 906 "boat anchor" heads from the shelf yesterday and strip them, so I thought I might as well take some pictures of them as we had no pictures from years before. In 2011 we used them in a Mopar Muscle Magazine dyno contest at Comp Cams and they have been sitting lonely on the...

Huh? You want to do what? Sounds like fun, let's try it.

Kinda got the 346 iron heads ready for the KB251 pistons. Flat chamber depths were from .084"-.102" and they are all now .110". The quench pad on the pistons are .260" tall and we'll have to mill about 1/2 that off or rather some .125" with the preliminary measurements. Cody and I are having...

The thread on a head and cam selection for a 440 got me to thinkin' about some old 2014 dyno tests we did on a 8.9:1 compression 440 with 2355 pistons. I thought I had burned the old dyno sheets but there in the corner was a dusty yellow folder with a stack of 80 dyno runs. So then we have two...

You would think these La Roy clowns could do better than 3rd place. Here is a Mopar Muscle Magazine article from 2009 on the 451 that J.Rob was asking me about. Some pictures are available on the website also. There was a lot of laughing when we said we were going to make 700+ horsepower when...

There are a lot of other things I would have rather been doing, but we got involved in some flow test comparisons between the two intakes. We've got a 440 coming in for dyno tests and I believe we'll be able to tests the two intakes in back to back dyno runs.

Some thoughts, by others, on the Sidewinder heads.........not that I mind this being on the low compression 400 engine thread, but the subject is kind of hidden there. An Error Has Occurred!

What do you think? We made this several years ago and never got it on the dyno or in a car. Modified 383 Victor Intake and a modified HVH SS4500/4150 2" Spacer. It was made for a dyno contest that we were going to run a 400 based stroker but switched to a 440 based engine so we never used it...

Don't let the world think we have to give up anything to the Trick Flow 240 community. Fight for your right for horsepower from your RPM heads and let the world know you've got a great head too! Here is a 93 octane 451ci stroker with RPM heads that made 723HP on Comp Cams dyno in 2009. And...

What airflow difference will you see if you do a valve job and quickly clean up the ports? Your results may vary, here are the last ones we did. Exhaust was using a 2" tube. Lift.........OOTB IN/EX.........Prepped IN/EX .100..............70/57..............75/59...

.040 over 440 for 448ci, 10.6:1 running on 91 octane 950 Quick Fuel Edelbrock RPM Performer Victor cylinder heads that flow like the OOTB Quick Fuel 240 CNC heads Custom Comp Cams solid flat tappet, idles at 750-800 rpm Hughes Engines 1.6 rocker arms Scat rods SRP flat top pistons...

Just curious, is anybody using stock rocker arms with a hydraulic roller cam in their big block? If so, hows it working out for you?

Just some fun stuff we are working on. Of course, while we wait for the TrickFlow heads, ahem. Lift...............OOTB IN/EX 2" exhaust tube............Ported .100.......................73/59................................73/61...

What do you think? Jan-Mar 2015 Engine Professional Magazine. 400 based 499 MP 509 cam, 248/248 @ .050 114 LSA OOTB RPM heads MP stroker windage tray 7 qt Moroso oil pan Wieand G-Force single plane 10.3:1 Crane 1.5:1 aluminum roller rockers Meziere Electric water pump MSD crank trigger and...

So ya want a 400 for your company 2whl drive pickup that the employees will drive daily and you don't want it to be a hot rod. Huh.......... So we keep the stock 2bbl Holley and cast iron 2bbl intake. Let's deck the block to square it up, bore it .030" over and hone the cylinders with a deck...

505 stroker with Edelbrock Torker II and then made a change to an Edelbrock Performer RPM intake. Then Torker II w/ 2" spacer. RPM...............TQ/HP.................TQ/HP..................TQ/HP 3200............548/334...............600/366...............534/325...

Custom hydraulic roller cam in a 505. 1st pull hydraulic lifters, 2nd pull we switched to solid roller lifters. No other changes. RPM................TQ/HP................TQ/HP 3000..............517/296.............523/299 3200..............539/328.............548/334...

The geologists are about to discover that Pop's 440 was causing the swarm of earthquakes here in Challis, ID. What if the 505 causes a volcano?

Dad built a 440 for his truck, started it a year or so before he died. That was, what man, 13 years ago? He finished it and stood looking at the truck through the living room window and said, "Well, I got it the way I want it and I'll never get to enjoy it." 'Coupla weeks later he was gone. So...

HAH! I just got myself a free 440. Man had a shop here install a cam and timing chain. Turned the engine over and bent 3 pushrods. Shop told the owner, "She's ruined, we can't fix that!" He contacted me and asked if I would haul the engine away. Even after telling him we could easily fix it...

While it is fun playing with the new dyno, we have to drop the Hemi research for a while and get some other work done that people are waiting on (sorry for the delay gentlemen). So a quick note on the Hemi. We have discovered some oil return problems (among other things), made only a few pulls...

I was asked to give some information about the 451/400 we used as a dyno mule to test out our 901 SuperFlow dyno. This was a 400 based stroker with a 440 crank turned down to 400 mains. Scat 6.76" rods Forged Ross Flat tops Ported 906 heads 9.5:1 compression M1 single plane 850 Mighty Demon...

We were asked to do a pair of the standard 440 Source Stealth heads, good to .750" lift, for a 451 stroker in Iowa. When we first spoke he wanted 600 HP with a turbo charger. He has since revised his attempt to 750 HP normally aspirated on pump gas. The latest standard Stealth offerings from 440...

Okay, we pulled the trigger on a pair of Super Stealths today, they'll be here next week. Its time to see what these heads will flow. We'll slip some valves in and do some OOTB flows, then work them over and see where they go. If they really do have more potential than the Stealths, they...

Well, if I was going to run a standard offset rocker in a aluminum head with a stock intake port opening, I'm going RPM or Stealth. If I'm using a standard offset rocker with a Max Wedge intake window height, its the Indy EZ. Never fully tested an Indy head myself, until yeaterday, when I...

So after playing on the flowbench for two weeks of testing, we have some results for the Standard Stealth, RPM and 906 iron head with the standard stock intake port windows. At .700" lift the Stealth went 337 cfm, the RPM 335 cfm and the 906 went 338 cfm. When we opened up the intake port...

So, how much airflow increase through the cylinder head, will give the same horsepower increase as raising the compression ratio one point? When does airflow win? When does compression ratio? Where's your proof, huh, who has tested this?

Factory 400 block, stock or aftermarket crank. So, how many of you here have made 700+ horsepower with your 451 and pushed the crank out the bottom of the block? How many have made over 700 horsepower with the 451 and never lost the crank (broken the block).