How much HP you guys think?

[TK]

I figured it's about time for me to post a how much HP thread...........

3.31x3.94 318
Flat top zero decked pistons
balanced
trayed
Milled ported 302 heads, 1.88/1.60 valves
compression is 9.3-1
Lunati Voodoo 268/276-226/234-.494/.513-110LC-106INCL
Crane iron rockers
Holley street dominator Edel 600
Headers
MP distributer and ORANGE, repeat, OOORRRAAANNNGGGEEEE Box, stock coil. (sorry dw)

What power band you think it will have?
How do you think it will idle/pull vacuum?
HP?
TQ?

This is going to be fun, I just wish I had a dyno......

[451Mopar]

Quick "guess", 300HP@5,000 RPM and 350 ft/lbs torque @ 3,000 RPM, maybe 12"-14" vacuum, or 10"-12" under load?

I'll try plugging it into DynoSim tomorrow if I remember.

[rumblefish360]

The Holley intake is a tiny single plane intake right? I'll say 330 - 340 HP by 5500 rpm.

[dust]

I was thinking 300 max HP, what are the cam specs @ .050?

[Madman Stephan]

260 - 280 hp?

[TK]

Originally Posted by dust

I was thinking 300 max HP, what are the cam specs @ .050?

226/234 Dust.

Yes, the Holley is a small port dual plane. I have opened it up some, to the small port gasket size, and done some flow tricks Holley recommended.

I am hoping for 350-380HP, tuned well. But like I said, Hoping............

I cant find anywhere info on the flow of 302 heads, stock and opened up.

[crisser]

Originally Posted by TK

226/234 Dust.

Yes, the Holley is a small port dual plane. I have opened it up some, to the small port gasket size, and done some flow tricks Holley recommended.

I am hoping for 350-380HP, tuned well. But like I said, Hoping............

I cant find anywhere info on the flow of 302 heads, stock and opened up.

280 to 300 HP all done at 4800. You might get 325 HP if you run a 650 holley DP instead of that 600 edel. And it should pull to about 5200.

[dust]

Originally Posted by TK

3.31x3.94 318
Flat top zero decked pistons
Milled ported 302 heads, 1.88/1.60 valves
compression is 9.3-1
Lunati Voodoo 268/276 -110LC
Holley street dominator Edel 600

What I look at...

My money: 245-270hp @ the wheels

[TK]

Originally Posted by crisser

280 to 300 HP all done at 4800. You might get 325 HP if you run a 650 holley DP instead of that 600 edel. And it should pull to about 5200.

4800? Dang......I hope not, it ran nice to the 5100 valve float with a plain old comp 260, stock springs, and a performer manifold!

The main reason I am running the EB, is because this motor will be my new truck motor, and I don't trust a DP holley further than I can pee. I will see what it will do the the 1/4, and go from there, eh?

Lunati says the cam is good to 6100, usually, I get performance past where they say the cam runs out, so I am hoping for a 6000 rpm motor.

[crisser]

Originally Posted by TK

I will see what it will do the the 1/4, and go from there, eh?

.

Sounds good. But, turning 6000 is one thing and making power there is another. Those small heads and carb will start to choke at high speeds.

[rumblefish360]

It's a daul plane intake? I now knock 20 HP off the top.

[TK]

No, single plane. Quit knocking my HP runmble! I want some left!

[dust]

I thought single plane has an inverse effect on mild engine performance??

[TK]

230@.050 500 lift 318 is not mild.

[gorsic]

Just ran your cpecs through my computr dyno and came up with
366hp at 6000rpm, thats asuming the cam is as good as you say.

[gorsic]

P.S
thats a rough estimate so please don't put your expectations up to high.
Cheers

[rumblefish360]

Originally Posted by TK

No, single plane. Quit knocking my HP runmble! I want some left!

He he he, OK, I did think it a single plane.
OK, I'll have to re-raise the bar again.

Dust, a single plane can be a fickle thing to use sometimes. Dyno results allways look good when there tested. Actuall street use and happiness is another story.

[TK]

Small port single planes, produce better torque for me than dual planes, used on a small port engine. Big ports suffer down low with the single plane.]
Think of it this way, the HIGHEST HP 273, was single plane, mild cam, and the HIGHEST HP 318, was a single plane two four BBL, followed by the single plane 2bbl. Power and TQ fell when they put the dual plane 2bbl on 318's.
However, small port engines suffer on top, well, way on top.

366HP is right where I was hoping, and thinking. If it's there, I'll find it! How fast will 350HP push a 4000 pound truck down the 1/4??? Low 14's? I guess when I get the 318 in the truck, and trip to the strip, will tell me my HP.
I was mostly hoping for decent low end. The cam is said to be strong from 1800rpm.
I think the 2200ish converter will be about right.

[it's all dodge]

that intake will not keep up with the cam, will be all done at 5200 5400, max power around 5000, the 600 carb is no restricter, seen bigger circle track engines run plenty rpm on modified 2 barrels, ones that only really flow 450 cfm, so a 600, on that engine, if all was matched, could rev it to 7 or 8000 rpm, MP sold me a set of heads that are ported 302s, in hot rod mag with a 268/272 450 455 mp cam, a 323 made 331 hp. at about 5500. I say maybe 305-310 horse at 5000, and maybe 360 ft pounds at 3300 to 3700, pull 15 + atleast for vacuum,

[it's all dodge]

oh, yeah the intake on the hot rod test engine, late 80s, was eddy performer. and the heads MP sent me are cracked leak water between heat crossover, kinda hard to gripe to the seller when it was sold to me 4 years before I used them, had that same problem with the ductile iron rockers crane makes, tips all pitted, opened them up down the road to use them, Monicatti no help there

[moparman92]

Originally Posted by gorsic

Just ran your cpecs through my computr dyno and came up with
366hp at 6000rpm, thats asuming the cam is as good as you say.

off topic i know but what kind of computer dyno do you got and how does a person get a copy?

[TK]

Originally Posted by it's all dodge

that intake will not keep up with the cam, will be all done at 5200 5400, max power around 5000, the 600 carb is no restricter, seen bigger circle track engines run plenty rpm on modified 2 barrels, ones that only really flow 450 cfm, so a 600, on that engine, if all was matched, could rev it to 7 or 8000 rpm, MP sold me a set of heads that are ported 302s, in hot rod mag with a 268/272 450 455 mp cam, a 323 made 331 hp. at about 5500. I say maybe 305-310 horse at 5000, and maybe 360 ft pounds at 3300 to 3700, pull 15 + atleast for vacuum,

What small port manifold will perform better?

[it's all dodge]

your after the low end, that will do low end, had one on my 340 duster, previous owner put on, not many choices, but it would be neet to see your intake vs the performer intake, does weind or however they spell it make a small port? offenhouser? got a cam there should run to 6200 maybe 6400 or 6500, strong, cant see that intake doing it, atleast not near as strong

[451Mopar]

Ok, I ran the combination on Dyno-Sim using port flow numbers of 221 cfm @ 0.500" intake, and 142 cfm @ 0.600" exhaust.
The cam is larger @ 0.050 than I first thought, so here is a rough estimate of power:
323 HP@5,000 and 380 ft/lbs @ 4,000.

Here is the power curve in 500 rpm increments:
RPM HP TQ
1000 45 236
1500 84 293
2000 127 334
2500 167 350
3000 207 363
3500 251 377
4000 289 380
4500 315 367
5000 323 339
5500 321 298
6000 288 252
6500 252 204
7000 215 161

Also, I have used the Holley Street Dominator on a 318 that had the Mopar Performance 284/0.484" cam, with a 600 cfm Holley and it ran pretty strong (with a very rough idle), but as you can see in the power curve, not much torque under 2,500 RPM, so you should use a high stall converter.

[TK]

The TC, is a tweaked /6 converter, that should be about 2200 with this cam. The converter stalls about 2400 right now, with a sick 7 cylinder 318.
I have ran the same manifold on a 390 inch 318, and it pulled nice past 6000, and on a previous 318, with a comp 268, and it ran out about 5500. (Both engines had small port heads.)
I don't know about your 340, but the streetdominator I have, is a small port manifold. I am unsure how a small port manifold will work on a big port head..

[rumblefish360]

Originally Posted by rumblefish360

The Holley intake is a tiny single plane intake right? I'll say 330 - 340 HP by 5500 rpm.

As posted by 451Mopar;
Here is the power curve in 500 rpm increments:
RPM HP TQ
1000 45 236
1500 84 293
2000 127 334
2500 167 350
3000 207 363
3500 251 377
4000 289 380
4500 315 367
5000 323 339
5500 321 298
6000 288 252
6500 252 204
7000 215 161

Ehhhhhhhhhh, not a bad guess.

[TK]

Yeah yeah......LOL

I was hoping for 350.......

Wonder how I could get 350 out of it, without changing heads.

[rumblefish360]

1/2 point m,iiling? Wait, Magnum heads. Extreme air cleaner set up. Whittle down the boosters in the carb,

[TK]

9.3 is about as high as I want to go, with a trailer puller. Don't you think? (gas hit 3.05 today..........)))

Extreme air cleaner set up? Huh? Tell me more, you mean ram air?

I could get more power, but that would take a bigger manifold/cam, and that will kill the small amount of low end torque I have...........

Any other idea's?

[George G. Leverette]

Those are some very good torque numbers, just what is needed in a heavy vehicle or a vehicle used for towing or climbing hills. 350 HP is on the ragged edge for a 318 and getting close to a single purpose car that is not fun to drive in all situations. You could be close to meeting your goals, why not button it up and fine tune it.