Mach 1 Dyno Run - Vintage Mustang Forums
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post #1 of 26 (permalink) Old 09-14-2019, 03:22 PM Thread Starter
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Mach 1 Dyno Run

I just got my 1970 Mach 1 running last spring. My Mustang club was doing a Dyno Day, so I brought my car just for fun. We had just over ten cars from the club. This is was a wheel dyno, so the numbers weren't that high.

My Mustang won the "Pony Power" award for the highest horsepower from the carbureted car. The numbers don't appear very impressive, but they were much higher than the other cars. Two of the 289-powered cars didn't break 200 HP and won was at 204 HP. The last carb car to go was a '68 GT with a factory 390 and an Edelbrock top end kit. I expected that car to blow me out of the water. Although the torque numbers were higher than my car, the horsepower was well below. (I think he had some tuning issues.)

Here's a link to a video of the run just for fun.


My engine isn't at all tricked out. Here are some details in case you're curious:

- Factory 351 Cleveland short block
- Australian 2V Cleveland heads (iron)
- Custom solid, flat tappet cam from Bullet Cams
- Edelbrock Performer intake
- Summit Racing 600 CFM carb
- Factory distributor calibrated by Dan at Mustang Barn with Petronix III ignition
- Sanderson shorty headers

I don't know much about dyno numbers. I'm posting a copy of the graph and would appreciate comments.

Thanks.
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File Type: jpg Mach_1_Dyno_Run1.jpg (265.6 KB, 48 views)

Currently working on a 1970 Mach 1 project. See it here: http://forums.vintage-mustang.com/vi...ode-build.html

Last edited by Klutch; 09-14-2019 at 03:24 PM.
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post #2 of 26 (permalink) Old 09-14-2019, 04:15 PM
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Nice. Assuming a 15% drive train loss, you are about 313HP at the engine. I think they where rated at 300HP from the factory and that was high more like 280HP by today's standard I would think. I see a lot of white smoke after the run? What where the stock 289 putting down? I take it like 180 RWHP?

1967 Mustang Convertible, 289-4v, C4, Edelbrock Performer Intake, Mild Cam.
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post #3 of 26 (permalink) Old 09-14-2019, 05:03 PM Thread Starter
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Nice. Assuming a 15% drive train loss, you are about 313HP at the engine. I think they where rated at 300HP from the factory and that was high more like 280HP by today's standard I would think. I see a lot of white smoke after the run? What where the stock 289 putting down? I take it like 180 RWHP?
My Cleveland has an issue with blowing smoke under high vacuum situations, like letting off after high RPMs or cruising downhill with no throttle. It's not as bad as it used to be. I don't know what's causing it. I had the block bored and I installed new pistons. The engine has just over 2,000 miles on it. Every car, even the brand new Mustangs, blew some smoke after the dyno run.

None of the 289s were completely stock. The first car had an Edelbrock 4bbl carb and aluminum intake. It was around 140 HP. A similar car was at 160 HP. The third 289 had a pretty stout Crane cam as well and it was at 204 HP.

I suspect having my distributor calibrated made a difference. Nobody else had that done. Seems to me the power curves look pretty nice.
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post #4 of 26 (permalink) Old 09-14-2019, 06:06 PM
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Check your egr valve on the valve cover, make sure your valve cover has a plate under it so it can’t suck in oil under high vacuum. Otherwise valve seals. Possibly an intake gasket. Make the car smoke as bad as you can then pull over and inspect the plugs. See if its localized to one or more cylinders.
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post #5 of 26 (permalink) Old 09-14-2019, 06:25 PM Thread Starter
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Check your egr valve on the valve cover, make sure your valve cover has a plate under it so it canít suck in oil under high vacuum. Otherwise valve seals. Possibly an intake gasket. Make the car smoke as bad as you can then pull over and inspect the plugs. See if its localized to one or more cylinders.
- There is no oil in the hose which connects the oil cap to the air cleaner

- There is no oil in the PCV valve hose

- Yeah, could be valve seals. They're new, but they are the lame umbrella seals. I should have installed better valve seals. I suspect that's the culprit

- I installed a new, "turkey pan" intake gasket. That seemed to help, but I'm not certain

- I have inspected all the plugs and, strangely, there's no sign of any plug burning any different from the others
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post #6 of 26 (permalink) Old 09-14-2019, 08:34 PM
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Nice, car sounds healthy.
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post #7 of 26 (permalink) Old 09-14-2019, 09:00 PM
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If you like how it runs - congrats. If you want more power, up the carb to the 750 area and get some quality long tube headers. Also, that intake is not helping.


Again, your car looks and sounds fine to me, but you are leaving 50HP on the table with that intake, carb & header combo - assuming your cam is up to the challenge.
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post #8 of 26 (permalink) Old 09-14-2019, 09:47 PM
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Quote:
Originally Posted by Klutch View Post
I just got my 1970 Mach 1 running last spring. My Mustang club was doing a Dyno Day, so I brought my car just for fun. We had just over ten cars from the club. This is was a wheel dyno, so the numbers weren't that high.

My Mustang won the "Pony Power" award for the highest horsepower from the carbureted car. The numbers don't appear very impressive, but they were much higher than the other cars. Two of the 289-powered cars didn't break 200 HP and won was at 204 HP. The last carb car to go was a '68 GT with a factory 390 and an Edelbrock top end kit. I expected that car to blow me out of the water. Although the torque numbers were higher than my car, the horsepower was well below. (I think he had some tuning issues.)

Here's a link to a video of the run just for fun.

https://youtu.be/5GGozueVAU8

My engine isn't at all tricked out. Here are some details in case you're curious:

- Factory 351 Cleveland short block
- Australian 2V Cleveland heads (iron)
- Custom solid, flat tappet cam from Bullet Cams
- Edelbrock Performer intake
- Summit Racing 600 CFM carb
- Factory distributor calibrated by Dan at Mustang Barn with Petronix III ignition
- Sanderson shorty headers

I don't know much about dyno numbers. I'm posting a copy of the graph and would appreciate comments.

Thanks.
What transmission is in your Mach? I think it was a 4 spd manual?

You're probably pretty solidly in the 300-325 hp range at the flywheel.
My decently built fuel injected 289 did about 210 RWHP on a similar dyno. Or about 260 at the flywheel (C6 auto).

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Last edited by GT289; 09-14-2019 at 09:59 PM.
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post #9 of 26 (permalink) Old 09-14-2019, 09:53 PM Thread Starter
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Originally Posted by 66kcar View Post
If you like how it runs - congrats. If you want more power, up the carb to the 750 area and get some quality long tube headers. Also, that intake is not helping.


Again, your car looks and sounds fine to me, but you are leaving 50HP on the table with that intake, carb & header combo - assuming your cam is up to the challenge.
I am happy with the way it runs. I thought about a bigger carb, but I live at 6,700 feet above sea level and I think my low-end would suffer.

I am very skeptical swapping the shorties for long tube headers would make any difference.

Yeah, the intake isn't the best, but I have a shaker and if the intake is any higher, the shaker top would stick out way too far above the hood.

The cam is amazing! Those guys at Bullet know their stuff.

Thanks.
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post #10 of 26 (permalink) Old 09-14-2019, 09:55 PM Thread Starter
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What transmission is in your Mach?
It's a TKO-600.

Currently working on a 1970 Mach 1 project. See it here: http://forums.vintage-mustang.com/vi...ode-build.html
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post #11 of 26 (permalink) Old 09-14-2019, 11:12 PM
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Originally Posted by Klutch View Post
I am happy with the way it runs.
I wish they would hook up heart monitors to dynos...

You had to be hitting 150 bpm...

Allen
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post #12 of 26 (permalink) Old 09-14-2019, 11:36 PM
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Reading this takes me back to my Dyno moment...never been near a Dyno, yet, I had to determine my engine build. Not too far from my hood is a "go fast" garage with a chassis Dyno, I was very nervous as this engine was one of my handcrafted builds. The tech(s) get the car setup, hookup and stabilized. I stated they should go for 6000 RPM WOT. They get it set up and "punch it" it approximately 2000 Rs. The engine is screaming up to 4K and onto 6K, I'm waiting for the engine to explode! They do this 3 times, each time I'm having a mini stroke, thinking the engine is going explode. Well it didn't, and I was so gratified, my handi-work held together......

How many of you have "been there done that"?
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post #13 of 26 (permalink) Old 09-14-2019, 11:45 PM
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I thought about a bigger carb, but I live at 6,700 feet above sea level and I think my low-end would suffer.
I saw this and thought to myself "where the heck does this guy live that he's 400 feet higher up than me?" and then I saw your location and it all made sense Your Mach 1 is beautiful from what I saw in the video--enjoy!

65 Mustang Coupe--363 Stroker, Performer RPM dual quad with two 600 cfm Edelbrock carbs, Astro A5 and 3.89 geared Currie 9".


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post #14 of 26 (permalink) Old 09-15-2019, 03:40 AM
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Good looking car. I had a 351C way back that would smoke on decel. I ended up pulling the heads, getting bronze wall valve guides installed, machined for Viton seals, another valve job, and no more smoking. Just a suggestion for the smoking, especially if you have used heads without replacing the valve guides.
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post #15 of 26 (permalink) Old 09-15-2019, 03:55 AM
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Isn't some smoke on the cycle down normal particularly on carberated engines with a wheel dyno?


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