582 Combo's
 

Hey guys, just dropped my motor off at the shop to get Freshen up. Was thinking of maybe trying to get some upgrades done to it (more power upgrades) but was up in the air what to do to it Here is what it is
582 4.375x4.600
BMF 385 Heads fully Cnc'd by BMF
Erson "asshole grind" Cam
# 420-116
Int-808 Ext-765
Duration 314/324 @50 284/298
112 L/C
Compression is 14.2:1
Sniper Intake Ported
Terminator
will be going into a dragster

I'd like to gain 30-50hp any thoughts on maybe a cam swap or ??

thanks

David, would you happen to have the flow numbers for your heads?

Thanks,

George

I wish I did. But do not, might not be a bad thing to have done when they are off the motor.
I talked with Curtis he felt he could gain some, but sounds like he is pretty busy for awhile.

whats it making now (hp/Tq) ?

Brian

960hp without vacuum pump, figured 970-975 with it. The TQ slips my mind at the moment and I am not with the dyno sheet
It runs very strong but with added weight (suspension) to my car I am hoping to gain a little back with the motor.

http://www.thebmfstore.com/ProductDe...ductCode=10385

Listed right on their site.

i see you getting 30/40 more with some trick head work,maybe get another opinion on your new head work/cam combo..

reason i say this is that Scott Duggins of PAR Racing Engines down here in S.C. is getting a little over 1,000 hp on his 565ci with the new oval port heads.


but make no mistake your 582ci is making some power on its own now,.

its killing my little raggy 511...lol :D

Brian

thanks !

Brian, I have no doubt this motor would go over 1000hp on Par/RM/APD/OC and several other dyno's, but still I think there is some on the table. It runs darn good, just adding 100lbs to the car another 30-50hp would help offset this.

David, Why are you adding a 100lbs to the car.

Not to mention my rattyass 496!

George

sucker-suck-a- tash,,you rat fink......lol

Swingarm Suspension Rear, and Single Shock Front, new tabs, mounts and what not it gained 100lbs after the work was done.

Shucks, there goes a .010 right there in weight and a .010 in suspension !

It's funny you mention that. I've been kicking the idea around of building a 582 and have run about every combo I can think of through my saftware. But unless you can get a set of heads flowing upwards of 480 or so there's not much more power to be had over a 565. The 582 had just a bit more torque due to the longer stroke but hp was within 5 of the 565. So I have just about decided on a 565 unless Curtis can pull a bunch of air out of his butt with a set of conventional heads. The Edelbrock heads I've been talking to him about flow around 450 so it's close but those same heads wake up the 565 as well.

Decisions, decisions.

George

This is 2nd time I've done the switch first time I lost .10 with weight and suspension both. I have a few other things to get it faster, changing from the 34.5's back to the 33.5 hoosiers .04 there, conv is stupid loose because the car wouldnt go straight/hook at any track. 6800 stall falls back to 6200 and sits there for .50-52 seconds after shift, I have a 6200 TSI 9" spragless to put in it. It went 4.67@147 in 3200ft of air and 91 degrees. Could be the most tire shaking/spinning car I've ever drove, hope the suspensions take care of this issue which I am sure it will. I'd like to settle it back in around 4.75@145

i tell ya what George..these boys running the 565ci i mentioned above and impressive as heck..as you know i am not much for particpating in bracket racing but i do attend and hang out with the guys..i see these 565's making rounds after round,after round...and really consistant.
my cousin purchased the PAR 565 and ran it in a 3000lb 67 nova with driver and ran consistant 5.60's with a low et of 5.58..on gas and all motor. ladder bar ,small tire car..

if somehting happend to my 511 i hope it happens early next year cause i will go with a 565 shortblock and use my conventional heads..on alcohol of course..lol

So yes i say 565ci with conventional heads for sure !
Brian

The only way i could get rid of tire shake with the new car is the 34.5 tires . Get a Hughes 9" softhit conv. It hooks consistantly and picked me up 4 hundreds over the loose GM-95

No replacement for Displacement right ?

the 565's run good, but almost every 582 around here out runs the 565's by a good tenth. I've seen APD put a 1950lb american with, oval port bb3x's go 7.21 .

Davis I think the 4 link will help this I have a set of 34.5's just in case not. Its hard to make a 225" Car made for a small block hook on a hot track with the big block. It sure was ill to drive.

The Coan 6800 is a softhit also, I have a few conv's sitting on the shelf to try good thing for early spring testing :D

Well the one thing you didn't mention was how much you are willing to spend. And with out all the specs of the engine it is hard to tell.
You could always go with a bigger stoke. 4.500" will give you 598ci and a 4.750" will give you 632ci. And we all know that more CI will get you what you want, more power and torque.

just my 2¢ worth


gyrogearloose

I've thought about putting the 4.5" stroke in there and even talked to my engine guy a little about it. For the cost crank, balance job that is not the most cost affective way to gain very little. Hopefully we come up with something thinking the heads need a hand port to them.

Go with BIG DUKES that'll add your 50 and a whole lot more :) :wink:

I wish I could wing that right now but just not in the pocket book to do so. I drive a buddies car once in awhile its a big duke motor 565, I was .05 faster then him last time we were out same weight cars :lol: