360 on the dyno

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Here it is with the Edelbrock 600. AF ratio is off with this carb too.

20220422_181115.jpg


20220422_181125.jpg
 
missing linc said:
I remember too well my 351C Ford, built in the 70s, 11:1 compression, 4V iron factory heads, big cam, etc. Ran like a scalded cat on a cool day, but always on the edge of detonation and usually at 200-210*, even in cooler weather. Helluva lotta fun though, when it wasn't eating transmissions at least.
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Yes sir. That was the 71 BOSS 351. That was kinda the "last hoorah" for Ford.
 
Babyblue66 said:
It really doesn't take much to build a strong engine. Just the right combination and a little porting. Thanks for all of the positive feedback.
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Yes sir. You summed it right up. It's all in the matching parts.
 
Babyblue66 said:
Put a performer RPM on it.
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I bet with the rpm and some carb tuning, (fatten up that one side, and slightly lean out the other) that would exceed 1hp/cu in pretty easily. Assuming the dynos widebands were accurate. Nice street engine.
 
Babyblue66 said:
I built this for a lady's 71 Duster. Her old 360 was a turd. She also requested it "sounds good".
8.8 to 1 using speed pro H405CP pistons
2.02 1.60 stainless valves
Stock replacement rockers, shafts, and pushrods
J heads with a little pocket porting
Hughes 2336 Whiplash cam
Performer intake
Recurved old Mopar Performance distributor
With my 750 Holley HP it made
353 hp
388 ft lbs
Using her 600 Edelbrock it lost about 10hp and torque.
Ignore that little curve at the beginning of the pull. It has something to do with loading the dyno.

View attachment 1715912413

View attachment 1715912414
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What head gasket thickness did you use?
 
Dan the man said:
Thanks. I like the combination that you used. Thanks for sharing that with everyone and the dyno read out
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No problem. I like seeing different engine combinations on the dyno. I know there's a lot of engines put together with the wrong parts, so I don't mind helping somebody make informed decisions.
 
TT5.9mag said:
I bet with the rpm and some carb tuning, (fatten up that one side, and slightly lean out the other) that would exceed 1hp/cu in pretty easily. Assuming the dynos widebands were accurate. Nice street engine.
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Of course..... both sides of the carb feed both sides of the engine.
It’s likely the sensors.
 
Babyblue66 said:
Using her 600 Edelbrock it lost about 10hp and torque.
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Only a 10HP/10TQ difference between a shitty 600 Edelbrock and a High Performance 750 Holley? :lol:

The Torque curve looks a lot flatter with the Edelbrock.
 
Only a 10HP/10TQ difference between a shitty 600 Edelbrock and a High Performance 750 Holley?
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I guess I look at it differently.
I see it as...... even on a mild 350hp street engine that’s barely using 500cfm of air...... it still made 10ft/lb and 10hp more.
 
Babyblue66 said:
Flatter but less.
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Here's the breakdown in difference between the 750 and 600 on TQ:

3400- 5
3500- 1
3600- 0
3700- 1
3800- 3
3900- 6
4000- 9
4100- 10
4200- 11
4300- 11
4400- 11
4500- 11
4600- 9
4700- 8
4800- 7
4900- 6
5000- 6
5100- 6
5200- 7
5300- 6
5400- 7
5500- 8
5600- 8

Not really a big difference is it. Remember its a 600 VS and a 750. Did the Edelbrock still have the choke attached and did they try different jetting and rods on the 600?
 
PRH said:
I guess I look at it differently.
I see it as...... even on a mild 350hp street engine that’s barely using 500cfm of air...... it still made 10ft/lb and 10hp more.
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Its a dual plane manifold with a split plenum so it only really see's half the carb.

Lets not forget Chrysler put 800's on stock engines that came with dual planes. So the 750 is closer to the mark.
 
Hysteric said:
Here's the breakdown in difference between the 750 and 600 on TQ:

3400- 5
3500- 1
3600- 0
3700- 1
3800- 3
3900- 6
4000- 9
4100- 10
4200- 11
4300- 11
4400- 11
4500- 11
4600- 9
4700- 8
4800- 7
4900- 6
5000- 6
5100- 6
5200- 7
5300- 6
5400- 7
5500- 8
5600- 8

Not really a big difference is it. Remember its a 600 VS and a 750. Did the Edelbrock still have the choke attached and did they try different jetting and rods on the 600?
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We changed the needles and richened it a little, there wasn't really any change. Every last hp wasn't needed. It'll run good and the jetting will be different anyway sucking in 190 degree air from the radiator.
 
Here's the breakdown in difference between the 750 and 600 on HP:

3400- 3
3500- 1
3600- 0
3700- 1
3800- 2
3900- 4
4000- 7
4100- 8
4200- 9
4300- 9
4400- 9
4500- 9
4600- 8
4700- 7
4800- 6
4900- 5
5000- 6
5100- 6
5200- 6
5300- 6
5400- 7
5500- 8
5600- 9

Not really a big difference here either. Remember this a junk 600 Eddie vacuum secondary vs a High Performance Holley 750 Double Pumper I assume. Not only is there a big difference in design and quality but raw CFM. That big dollar carb sure made a big difference. This should get some people fire up no doubt......:lol::poke:

Did the 600 still have the choke attached?
 
Hysteric said:
Here's the breakdown in difference between the 750 and 600 on HP:

3400- 3
3500- 1
3600- 0
3700- 1
3800- 2
3900- 4
4000- 7
4100- 8
4200- 9
4300- 9
4400- 9
4500- 9
4600- 8
4700- 7
4800- 6
4900- 5
5000- 6
5100- 6
5200- 6
5300- 6
5400- 7
5500- 8
5600- 9

Not really a big difference here either. Remember this a junk 600 Eddie vacuum secondary vs a High Performance Holley 750 Double Pumper I assume. Not only is there a big difference in design and quality but raw CFM. That big dollar carb sure made a big difference. This should get some people fire up no doubt......:lol::poke:

Did the 600 still have the choke attached?
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Yes it had a choke. If this was a 450 hp engine the difference would be more dramatic. Who said a 600 Edelbrock is junk?
 
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