Suggestions on streetable 550hp 440

[TwiZtiD440]

How does this sound to produce a streetable 440 that can put out about 550 hp

+.030
Forged Rods + Pistons
906 heads port and polished
Vavle train by comp cams with a 1800-6000 band, 4.88 intake lift (XE274H)
Performer Rpm Intake or something with "stable" idle 800-850cfm carb
Windage Tray
Edelbrock water pump

All hooked up to a rebuilt a833 built to handle alot of hp with a 4.10 rear.

Does this setup seem capable of producing more than 500hp? Does anyone have a similar STREET setup that produces something around these lines? Any recommendations?

[MoPaul]

edited...

[DartGT66]

A short answer;no. Sounds it could be close to 400 hp depending on the CR. The Edelbrock rpm test engine made about 450 hp and it was pretty much scienced out combo with big valve heads and a bigger cam. Better heads and a bigger solid or roller cam might take you close to your goal with around 10:1 true CR. The RPM intake might be the next limiting factor.

[Magnum440]

Getting a 440 to produce 1 hp per cubic inch is'nt too difficult. Now, you are asking for a bit more than that and so it's not so easy. As Dart66 said your cam and intake are not up to the task.

You will need a cam with around 260 degrees @ .050 lift. Hughes has some fast rate of lift hydrlic cams in this range.

Use a Mopar M-1 single plain or Edlebrock Victor or Weiand Team G with a 950 double pumper.

The Edlebrock heads are about your best bet. It would cost you nearly as much to port and set up the old iron heads! You will need the 290cfm flow rate of the eddies to reach your goal.

If you plan on "juicing" the motor you should use a forged piston(Ross or JE) and moly rings. You can use the stock forged "LY" 440 rods but have them "race preped". Your CR can be no less than 10 to 1, if using pump 94 is planned. If you can afford some race gas bump ypur CR up to 11 to 1 and run a mixture--this would be even better with the cam you'll be using.

Remember, the secret to making power is in the cam and heads. Dont slack off on either one! Get the best you can afford.

There are a few other things you will need like a good distributor, oil pump, etc.

Hope this gives you an idea on what it will take to get an honest 550 hp out of a 440.

Good luck!

[Jims451]

Let me get back to this one after I go find the recent magazine articles where they did this, using a fairly mild cam with around 240? duration @ 0.050".

What I do know is that the better the cylinder heads you use, the easier it will be to make the power. For the 906 heads to work at this level you would need to have them professionally ported using the larger size valves. This will probbably cost more than the Edelbrock heads, and if you want even more power you will need to replace the 906 heads anyhow, where with the Edelbrock heads, you could have them ported for more power.

You will also need a big carb, around 950 CFM.
For the intakes, I think the Performer RPM intake is the only dual plane intake (other than the Indy intake) that might work, otherwise you will likely be using a single plane intake like the Mopar M1.
I mentioned the Indy dual plane, but I think it has max wedge port size, so it may not work with the Edelbrock heads?

[TwiZtiD440]

Thanks !

[fastback340]

trw "six pack" pistons .030 over
10.25:1 comp. you'll have to mill the heads or block to get the comp. up
edelbrock perf. rpm heads
comp cams xe274 com
230/236-.523"/.523" with 1.6 rockers
edelbrock perf. rpm intake
4 hole spacer

this is the motor car craft built it put out535 hp @ 5300 rpm and 583 ft lbs @ 4100.

switch to a hughes engines solid cam and you should hit 550 hp

[TwiZtiD440]

If down the road I'd like to add a blower, that requires about a 8:1 cr, how do I take a 10:1 back to 8:1 the RIGHT way? Complete new heads? or a thicker gasket?

[fastback340]

new pistons is the only way. but then you need to make other mods also. trust me 550hp is plenty. setup right it should be enough for mid to low 11s

[Rob Voyles CA]

Twizt...in case your interested...I've got:

Pair of 906 heads for BB mopar
fully ported (flow 272 cfm on intake)
2.14 / 1.81 valves
bronze guides
guides machined for high lift cams
machined for double or single springs
pc seals installed on intake valves
regular seals on exhaust (pc seals are not recommended on exhaust for street driven motors)
Spring seats machined to accept large diameter valve springs
64CC Combustion Chambers
$500

[BB 70 Challenger]

Hi

Theoretically (by AirFlow Research cylinder heads): to get 550hp from an engine the heads need to flow at least 263.15 cfm on the intake side AT YOUR CAM´S MAX LIFT. I mean if the heads flow that amount at higher lift, say at 0.700" and your cam opens the valves only 0.488" or even 0.521 the heads probably wont´t flow enough at that low lift, right? And if they do then great, just get the heads that have 263+ flow numbers at your cam´s intake lift.

Just my 2 cents, - BB 70 Challenger -


PS to "Rob Voyles CA": wow, nice looking heads you´ve got! By the way the combustion chamber flat portion looks and the 64cc you said and that thin valve cover gasket on the intake side.... you shaved those heads something like 0.1 inch or more ??? With modifications and flow figures like that they sure put must put out lotsa power!!! In what kinda combo did you have them on?? Any Timeslips?? Anyway, for $500 for those heads it´s a good

[Rob Voyles CA]

Yep...they are milled .100, but the intake side is milled to match and a stock intake fits fine. Its not quite as thin as it looks in the pic. I wish someone would buy these though......I just upgraded (havn't got them back yet) to a set of edelbrock 440's that are being ported to 315cfm intake and 240cfm ex. and milled to 72 cc chambers. Hopefully will make about 600hp with 10.5:1 compression....nice street motor...lol. Plus a 250 hp NOS shot........

[BB 70 Challenger]

Yeah!

Your engines sound very nice, Rob! Keep up the good work!

Thumbs up, - BB 70 Challenger -

[TwiZtiD440]

Wow, some nice heads you have there, did you do any of the head work yourself? How much did just the milling cost? could I please have an email address or someway to contact you? Are you selling those heads fully assembled or bare? Yes, I am interested in those heads. Thanks for posting

[Rob Voyles CA]

My email is rvoyles@bak.rr.com

All the head work (porting, etc) was done professionally. My machinist charges about $150 to mill heads .100 because of how many passes it takes on the milling machine. These heads come complete with retainers except for springs...just add your springs and they are ready to run.

Feel free to email me with any questions.....