700-800 horse power 400 low deck

[moparcrazy]

looking for some input on my future Build...thinking of a 400 with victor heads 440source 451 or 512 stroker kit, big cam in the high 6 or mid 7 inch, 1000 c.f.m pro systems carb 12.1-13.5 compression race-tech pistons, roller flat tappet cam, Harland sharp rockers...looking for input thanks Guys !!

 

[451Mopar]

looking for some input on my future Build...thinking of a 400 with victor heads 440source 451 or 512 stroker kit, big cam in the high 6 or mid 7 inch, 1000 c.f.m pro systems carb 12.1-13.5 compression race-tech pistons, roller flat tappet cam, Harland sharp rockers...looking for input thanks Guys !!

I have been messing with the Edelbrock Max Wedge Victor heads on a stroked 400 block with the 4.15" stroker crank (about 500"). I started with some of the first set of the MW Victors that I think had some casting issues. For christmas, I picked up a new set from Hughes Engines with their CNC Monster porting. These castings look much better and look to have extra material in them. Hughes claims 400+ CFM at 0.800" lift. I am using flat top pistons so compression should be around 12:1.
I just ordered a custom Comp cam 272/278 duration @ 0.050", 0.726" lift with 1.6:1 rockers. The limiting factor will be my 4150 Holley HP 1,000 cfm carb.
The issue with the Victor heads is it is hard to get more than about 1.900" valve spring install height which limits valve spring choice and valve lift. Also, on my old heads I broke the center rocker shaft stands on both heads. The new castings look a bit better in this area. I am considering using longer valves in the new heads and mill off the rocker stands, and use the max wedge style rocker shaft blocks to raise the rocker arms to work with the longer valves. The oiling system has been enlarged and the main caps were replaced with the BCR aluminum main caps and girdle system. The rocker arms you use will have to match the cylinder heads. I a currently have the T&D shaft rockers that have the 0.725" offset on the intake rockers. I think Harlan Sharpe makes a 0.800" offset for the INDY heads?
I think this combo will easely be in the 700+ HP range.

 

[Cranky]

Are you planning on using aluminum main caps or rods? Question is how many passes will a stock block take with 800 hp?

 

[383man]

I would be going aftermarket block on that kind of HP. Ron

 

[Mike Gaines]

I would consider just buying a motor already built from INDY CYLINDER HEAD.

 

[67coronetman]

I would say the same Aftermarket Block or Spend lots of money making your current block choice stronger... Which i had a buddy that built a 500 cu in Stroker motor for a killer 70 Cuda Pro street car that had well over 800 hp but he spent lots of cash on block work the right rods & Pistons and so on.

 

[66Satellite47]

I built 2 452 low decks in the '80's w/cut stock 440 cranks & heavily ported iron heads(by me). 1st used short stock shotpeened rods & 13.5 pistons, 640 or 690 lift cams. 2nd same except 440 rods & flat tops cut for B-1's (never got to them). Presume about 600 HP based on ET & MPH(10.5 - 127 in 3550# B body). Be careful of the stock block. The 1st one broke a main cap & the crank seemed to be developing cracks (no ring) but never broke after about 150 passes. I ran ran these things to 7000 to 7300 RPM. Today's heads mean more power obviously, along with the long stroke mean careful attention to cylinder wall thickness (filled block?)

 

[IQ52]

I can offer encouragement that it is possible with most of your list. We used a 451 with ported RPM heads, Indy single plane, 1140cfm ProSystems Dominator, Erson solid roller, factory forged crank cut to 400 mains, Scat rods and Ross flat tops, 91 octane from the Stinker station and it dyno'd at 787 HP. It has over 100 pulls at 700+ HP, is detuned to 580 HP and now resides in the shop truck.

 

[451Mopar]

I would be going aftermarket block on that kind of HP. Ron

I agree. After messing with my engine, the cost difference is not that much. I started with a '71 400 block, but the aluminum main caps and girdle added another $800 for parts, then machine shop costs to align bore and hone the caps, and cut the block/caps flush for the girdle can add another $500-$800 in machine work.

 

[Cranky]

I can offer encouragement that it is possible with most of your list. We used a 451 with ported RPM heads, Indy single plane, 1140cfm ProSystems Dominator, Erson solid roller, factory forged crank cut to 400 mains, Scat rods and Ross flat tops, 91 octane from the Stinker station and it dyno'd at 787 HP. It has over 100 pulls at 700+ HP, is detuned to 580 HP and now resides in the shop truck.

Did the dyno pulls resemble a 1/4 mile pass? I ran a 3200 lb car with a 440 10.60's for over 300 passes before a valve spring put it out of commission. Knew they were getting tired but it was the last race of the season. It gave up in a time trial Luckily, the engine didn't come apart.

 

[IQ52]

Not having ever tested it, I don't believe that the dyno stresses the engine as much as a quarter mile pass.

 

[moparcrazy]

Well lead the way boys where can I find an aftermarket block that's not gonna cost me an arm and a leg ?

 

[super-bee_ski]

Check out HT413s build going on right now...
IQ52s engine build sounds sweet...

When the HELL are "WE" going to pull that K-member and put in that new system?
Call me...
But dont call me Blondie...
tee-hee-hee...

 

[benno440]

yeh or just buy a already built engine from muscle motors, mopar gurus only
http://www.musclemotorsracing.com/engines.html

 

[dvw]

Why Victor heads? Nothing fits. Rocker offset is a nightmare, push rods hit, spring height won't go 2". As much as everyone hates Indy, -1 's work pretty well. I wouldn't be afraid of a stock low deck. Make it as big as you can, it all costs the same. Compression?, if your not running pump gas crank it up. A 15-1, -1 head, roller cam motor will make way over 800.
Doug

 

[Jeremiah]

Why Victor heads? Nothing fits. Rocker offset is a nightmare, push rods hit, spring height won't go 2". As much as everyone hates Indy, -1 's work pretty well. I wouldn't be afraid of a stock low deck. Make it as big as you can, it all costs the same. Compression?, if your not running pump gas crank it up. A 15-1, -1 head, roller cam motor will make way over 800.
Doug

DVW speaks the truth. I'm getting my Victors figured out and buying a set of -1's for the next engine. The installed height is a big deal when it comes right down to it. Why do all of these CNC places advertise big flow numbers knowing full well that the heads can't get much more than .730 lift? And that's just the beginning.

 

[4406]

I would call Brad at QMP or Eric Jones at Jones Racing. Both in So. Cal. Just my .02



Ray

 

[Budnicks]

I can offer encouragement that it is possible with most of your list. We used a 451 with ported RPM heads, Indy single plane, 1140cfm ProSystems Dominator, Erson solid roller, factory forged crank cut to 400 mains, Scat rods and Ross flat tops, 91 octane from the Stinker station and it dyno'd at 787 HP. It has over 100 pulls at 700+ HP, is detuned to 580 HP and now resides in the shop truck.

here's that link, great read
http://www.dodgecharger.com/forum/index.php/topic,78039.0.html

 

[mopar 3 B]

Would it not be more economical to build a blower or turbo engine?

 

[Budnicks]

Would it not be more economical to build a blower or turbo engine?

or N20 or centrifugal supercharged...

it very well could be "in some cases", all the above,
they aren't really cheaper builds either, especially starting from scratch,
but are getting far more mainstream now, especially with todays efi, electronics/computers aids...

there's options to every build unless rule dictates differently...