Guess the hp/torque on street 589ci wedge

-
Hot Metal

Hot Metal

'69 440 Cuda
Joined
Dec 21, 2014
Messages
633
Reaction score
475
Location
UK
Hi guys, friend of mine recently bought this motor from a well known racer/builder etc. for a very good price. Going to run it in his street/strip '69 Roadrunner next year and should pick up 2 sec at least from what he ran this year, maybe a bit more, he's got a lot of driver learning to do!!, I'm gonna be there to help:rolleyes:
Anyhow here's the all the spec I know, not/enough but some.

Mega Block, 589ci, 4.500 stroke...4.5+bore?
Street Solid Roller .620" don't know dur. @.50, on a 112.
10:1CR, 572-13's probably stock?, Jesel rockers.
Indy 440-2 I think...dyno'd twice, once with an 850DP
and once with his own 950DP...dyno hdrs were prob 2"+
so unfortunately I don't have all the info you really need but have a go, see how close you can get with the limited info I've been given.

000hp/000ftlbs with 850DP?
000hp/000ftlbs with 950DP?....clue> made 1.9 vac@max rpm, was down a bit with this carb....personally I think it needs a 1050>1150 Dom.

?
 
one of those no's is close, the other miles out...max power was under 6k on 1 pull with the 950......10:1CR and a only a .620" sr
 
Yes....I'm not going to make this a long drawn out thing but some may learn something including me as there are not a lot of big ci street motors being built like this. The guys not a specialist dyno expert, don't know how much tuning he did on those 2 pulls either, he has a garage and builds engines but not this one, he does everything else as well as race his Mopars. The 2 pulls with different carbs were similar and a 1050 Dom was tried as well.
 
Last edited:
It depends on the cam. We ran a 572 inch boat motor the other day which made 700 ft-lbs and 650 hp. If the engine is set up for street driving then the hp will be much lower than if it is set up for drag racing. On a big motor like that the cam timing can change the hp number by 200 or more. All depends if you want the power down low for street driving or up high for racing.
 
572-13 heads with little or no porting don’t flow very well at all....... especially below .500-.600 lift.
So, with a .620 lift cam you’ll have a combination of a big port and low flow, resulting in low air speed.
The low CR isn’t helping to get things moving either.

Then there’s the dyno variable.
I’m sure I could find two dynos where that same motor tested on both could vary 100hp.

I wouldn’t be expecting anything too special out of it here....... but I have no idea what you guys got out of it there.

It wouldn’t surprise me if the tq number was higher than the hp number.

I’m not sure what your combo there is, but the “typical” BB Mopar 588 is 4.50 bore x 4.625 stroke.
 
Yes it was your right, if the heads are more or less ootb, would putting a bigger carb and cam wake it up in the usual manner without raising the CR, as this is what I was planning on suggesting to him at a later date. I know the -1's ootb aren't good but thought the -13's were half reasonable, 340+@.600?
As you say there are a lot of variables, our dyno's from what I've noticed here seem to be pretty accurate as in 1/4 mile performance, weight/mph show.

He wanted to run at least 10.5's next year but drive it on the street as well, I think he got what he wanted. I guess theirs not a whole lotta point in keep people guessing now as you all probably got a good idea>
with the 850DP......714hp/743ftlbs..@rpm?
with his 950DP......691hp@5700/724ftlbs@?..I don't think his 950 is that good.
1050 Dom made only another 3hp !!, but....we don't know if any tuning was done on any of the carbs to get better results.
So in his 3800lb RR it should go 10.30's@130+
 
Last edited:
Those numbers look legit to me.

I’d run it as is before changing anything.
The car would have to be pretty bad to not be able to run 10.50’s with that.

Those heads aren’t really a good match for what that type of build imo(small cam, low cr).

Indy R-1 cam??

A compression test might be interesting.

Those numbers are pretty close to a street/strip 572 I did with EZ295’s and an untouched 337 intake/4150 1050 carb..... similar peak hp rpm too.
With a port matched 440-2/adapter and 1150 carb it picked up a little over 20hp.
 
Last edited:
Indy R-1 cam?...276/276/.620/620, could be...yes we plan to run it as is for now as he's having to spend lots more money on a cage/Dana/mono's/2.1/4" hdrs, built 727/converter/slicks etc., I just hope he buys some dble adj. shocks as well, basically revamp the car to handle what he has now, it will hook and go as it did before with SS springs etc., but with almost twice the hp/added torque. I can't see him wanting to change pistons and up the CR so perhaps some more lift on the cam and a bigger carb may work for future 9sec performances and sorting the chassis. Planning stuff like that ain't easy when you don't know exactly whats inside the motor, but its gonna be interesting to see how it all goes, sort of like it was when I was racing with my junk.
I thought the -13's were half reasonable ootb, somewhere near 340+@600?, I know the -1's are rubbish ootb.
 
Last edited:
Well..... some cnc385’s I had here with 2.350 intake valves were:

.100—58.9
.200—121.2
.300—188.4
.400—253.1
.500—312.2
.600—370.0

440-1 cnc345’s with 2.25’s:

.100— 79.5
.200—146.4
.300—218.4
.400—278.6
.500—328.0
.600—360.5

The chambers on the -13’s are much closer to the valve, so there is a lot of shrouding.
Once you get the valve far enough off the seat, then the bigger port can start to move some air.
 
Got it...thanks., so lift+carb as always, just gotta get rid of his 950 I think though, perhaps a r/ratio change, see whats there....I think its a 4.560x4.5...was originally built as a 605 with a 4.625 crank.
 
Last edited:
You must log in or register to reply here.
-

Back
Top