318 dyno run.

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MOA

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This is a 100% rebuilt engine, everything is new. 1972 318 Bored .040 over, decked, .010 off heads, measured 65cc, 9.5 to 1, .028 head gasket. 273 adjustable rocket arms, 1.5 to 1, KB 167 piston, ex268 10 cam. .477 230@.50. Edelbrock manifold.
New Edelbrock 600 that took a ****.

With all the block and head work, the intake is not matched up with the heads. With the intake corrected I expect better, but it is what it is. Fish or cut bait, got tired of cutting bait.

325hp/350tq.

The edelbrock wasn't getting fuel, accelerator pump isn't working.

Put a Holley 750 double pumper on it, broke it in, did the pulls.

Put the edelbrock back on, did a pull with it, it made 3 ft lbs less and 2 hp less. It idled after the pull but the accelerator pump is not working.

It sounded ******* awesome!
At 6k rpms it was something to witness. The cam signs off at 5600 rpm.

Forgot to include, I ported the heads, 2 barrel heads, not extreme but enough to help.
 
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The 750 double pumper didn't give it more power, the 600 is all it needs.

Showed the limitations of the heads with small valves.
 
Everything was very linear, hp, tq, , tq all in very early. TQ was near peak before the dyno even started recording at 3500 rpm.

It was a fun day for me.

The dyno is right next to magic mountain, I could see them on the rides, I wouldnt swap seats.
 
The 750 double pumper didn't give it more power, the 600 is all it needs.

Showed the limitations of the heads with small valves.

I agree that 750 is a little much for a 318 and a 600 is good enough....

Those are decent numbers for a street engine... Nothing wrong with that... :thumbsup:


I have a similar engine going together right now...

72 318 standard bore with 8.5 compression, 67 closed chamber heads ported with 1.88"/1.60" 360 valves, Edelbrock LD4B intake, and a Holley 600 vacuum secondary with electric choke.... Can't remember the cam size, but close to yours...

I plan on putting it in my 66 Valiant wagon for street cruising... :steering:
 
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Everything was very linear, hp, tq, , tq all in very early. TQ was near peak before the dyno even started recording at 3500 rpm.

It was a fun day for me.

The dyno is right next to magic mountain, I could see them on the rides, I wouldnt swap seats.

How much vacuum were you getting at idle and @ what RPM???
 
What edelbrock manifold?
Ditto. Missing the actual name of the intake.
A major component.
Forgot to include, I ported the heads, 2 barrel heads, not extreme but enough to help.

FWIW, no such thing as a 2bbl. head.
However, 1.78/1.50 valves?
All looks pretty good from here. Nice engine.
 
Performer with spread bore. I don't remember the part number, it's all still at the dyno shop.

Small valves, yes.

15lbs of vacuum. It was running on an msd ignition but i have an FBO ignition that's going on it.
 
A Performer with a spread bore?
Then there is only one like it. LOL
Part number not needed.

I think your “Light minor head work” has paid off nice. You made some good power with a small displacement engine and a tiny head.
 
Summit Part number edl-2176

Made peak torque at 4300, peak hp at 5600


At 3500 it was making 333 ft lbs.
 
What engine shop was it?

Any printouts or pictures of the dyno sheets
 
Grub machine.

If I knew how to post picks from my phone........ Need a photo hosting site that I don't have set up and don't plan on it.
 
It wasn't cheap to break it in on the dyno! $800

But there was good reason for it. The machine shop ran the bolt into #1 cylinder, first thing I checked when I got the engine back. It wasn't much,but enough to be a concern. Getting a flat tappet cam to break in properly is super important.
Since the carb took a ****, it would of been difficult to get the cam to break in correctly with all the trouble shooting in the beginning. Glad I did what I did.

Didn't want to get it all in the car and have to yard it all back out because something went wrong. Plus, new ceramic coated Doug's headers are not recommended for break in.

Maybe I'm making more of the cam break in than I need to, but that was very important to me.
 
what tire, gear and converter are you going to use?
is this going in an A body? i
 
It has 265/35/18 nitto on the back (25"), will be going bigger. 355 rear end. 2200 stall. 904 has planetary changed, (398 gear ratio in first).

In a 72 dart.
 
Performer. I posted that earlier.
 
Grub machine.

If I knew how to post picks from my phone........ Need a photo hosting site that I don't have set up and don't plan on it.

JGM ...Jim Grubbs Motorsports

Circle track team I was on got motors from him in the late ‘90’s.
 
That's the one. I'm pretty sure Jim retired.

Planning on having them build my 97 360 magnum motor into a 408.
 
Edelbrock gave me a good price on a 1906 AVS 2 650cfm, so I jumped on it.

The 1906 has got nothing but good reviews.

No, I shouldn't of had to buy another carb and I could probably fix the 1406 but I don't want to fiddle with a finicky carb.

Pay up, move on, I've got other things to work on.
 
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