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514ci Dyno numbers seem low. Any tips?

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Post  mbllight October 11th 2021, 3:37 pm

Hello all, first post:

So ran my "new" car at dyno days this last weekend just to get a base number.   Was a bit disappointed by the numbers.  

Car ran 458HP and 457TQ at the wheels.  Seems a bit low to me..  Unfortunately, it was a dyno days, so no A/F numbers.

Car has:

514ci Ford Racing Crate Engine (600Hp @6250 and 590 ft/lbs @ 4750 stock ford ratings)

Eagle Rods
Forged Aluminum Pistons
Mechanical Roller Cam  .640" I/E @.050" 254 degrees intake 258 degrees exhaust
Cobra Jet Aluminum Heads 9.8:1 Compression
Torker II Intake
Holley 950HP Carb
Full Length Comp Headers 2" primaries into 3" Stainless Borla Exhaust

Car runs great and sound awesome but just had a bit of the Dyno
"pouts" after these runs.  figured car should be at 490-500hp/490-500tq at the wheels at least.

Car is running a Richmond 6-speed manual don't know if those trannies have higher drivetrain loss?  

What do you engine gurus think?  Power output decent or do I have some tuning issues.  I know the Torker is probably robbing me of some power, I see everyone saying Victor JR. much better intake.  I just don't think I have the hood clearance for Victor, car is 1969 Mustang.514ci Dyno numbers seem low.  Any tips?   1969-f10
514ci Dyno numbers seem low.  Any tips?   1969-f11

mbllight

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Post  Curt October 11th 2021, 4:51 pm

What gear are you in when you load the cell and what rear end ratio?
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Post  mbllight October 11th 2021, 5:38 pm

It is a 3.25 gear ratio 31spline, Gold Trac Diff.  

Ran it in both 4th and 5th..   no real difference.  5th had the slightly higher numbers, 5th in Richmond is not an overdrive, I think they 1:1 in 5th if I am correct..

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Post  dfree383 October 11th 2021, 8:34 pm

An xr292 is worth a bunch of power in those engines
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Post  Mark Miller October 12th 2021, 12:26 am

Nice Mustang if those are base numbers with no tuning i'm sure you can pick up some power with tuning and having a A/F ratio gauge to see what's going on!!FWIW i had a 1,000 cfm Holley HP on my 466 with Aluminum Cobra Jet Heads,Victor Intake Flat Top SRP pistons and a .670-.690 256-266 Duration @.050 lift,2"MAC Headers and 3" Exhaust with Magnaflow Mufflers 3.73 Gears C-4 with "10 Coan Converter and changed to a Quick Fuel 1050 Dominator and i can tell you by driving the car it picked up quite a bit of Horsepower big difference from the 1,000 cfm HP!!

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Post  mbllight October 12th 2021, 11:28 am

Thanks guys.  Yeah mark I LOVE it!  Very happy with it so far!  

Yeah going to have to take it to get tuned for sure without having all the info from run, kinda shooting blind.  I just replaced the Holley 850 that was on the car with a 950HP.  Figured for the street that would be a nice unit.   Wonder if I should have gone bigger, but didn't want to kill street drivability.

I also need to take it out on the track for a run or two. That will tell me the real story. If it turns some good times and good MPH, I guess the power is there Razz

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Post  Mark Miller October 12th 2021, 10:45 pm

mbllight wrote:Thanks guys.  Yeah mark I LOVE it!  Very happy with it so far!  

Yeah going to have to take it to get tuned for sure without having all the info from run, kinda shooting blind.  I just replaced the Holley 850 that was on the car with a 950HP.  Figured for the street that would be a nice unit.   Wonder if I should have gone bigger, but didn't want to kill street drivability.

I also need to take it out on the track for a run or two.   That will tell me the real story.   If it turns some good times and good MPH, I guess the power is there Razz

FWIW the street drivability of the Dominator[after i worked the bugs out]is just as good or better than the 1,000 HP IMO!!

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Post  mbllight October 13th 2021, 12:32 pm

Ahh good to know.  Always thought the Dominators were always either off throttle or full dump mode lol

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