351 C on the chassis dyno - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 15 (permalink) Old 10-10-2012, 09:14 PM Thread Starter
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351 C on the chassis dyno

Here is my 351 C on the chassis dyno. It is a CJ block with 4V quench heads, flat tops and about 10.5:1. Solid roller, 250/252 @ .050, .748 lift. It is big but surprisingly decent on the street. Some head work done, let me know if you want the details. The short block is about 10 years old, and could use a new set of rings. All this is going through a TKO 600, aluminum flywheel and driveshaft, 9", 4.11, Locker. Results- 395 HP, 360 ft/lbs. On pump gas with 20% blend of E-85.
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post #2 of 15 (permalink) Old 10-11-2012, 07:36 AM
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Re: 351 C on the chassis dyno

What intake?
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post #3 of 15 (permalink) Old 10-11-2012, 12:56 PM
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Re: 351 C on the chassis dyno

How high did you rev it on that pull?


1968 mustang 408W Hybrid..Burns gas and rubber!
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post #4 of 15 (permalink) Old 10-11-2012, 06:36 PM
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Re: 351 C on the chassis dyno

Awesome. The Cleveland has a fairly distinctive sound to me. I used to be able to guess correctly most of the time when a drag car was running one. For some reason I don't get most people think I run a big block in my car until I open the hood and the engine is about half the size of a big block. Maybe a combination of the cam, compression and the Super Comp's make it sound like more than it is.

If I can ever get 3 other projects done I have a Cleveland to put into something.

1965 289 mustang fastback
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post #5 of 15 (permalink) Old 10-15-2012, 02:08 PM
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Re: 351 C on the chassis dyno

good looking car....what does it run?

1964 Falcon hardtop
N headed 302/vic jr/c4/10''convertor/4.11/drag radial(235/60/15)

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post #6 of 15 (permalink) Old 12-24-2012, 06:41 PM
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Re: 351 C on the chassis dyno

nice! car sounds good too!! you might be making close to 470hp at the flywheel. 395rwhp is nothing to sneeze at.

1968 Galaxie 500 Convertible
---533 Stroker---Trick Flow Street Heads, 260/[email protected] .655/.656 Solid Roller, Victor Intake, 1150 Dominator, 2800 stall, 2" Crites Headers, 3" Exhaust w/Magnaflows
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post #7 of 15 (permalink) Old 08-22-2013, 03:08 PM Thread Starter
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Re: 351 C on the chassis dyno

Sorry for the slow response, intake is an RPM Air gap, rev to 6500 on this pull, and it did run in the 12.80's at Bandimere in Colorado. Our track is 6000' highat the density altitude is typically 8-9000', so I am looking forward to some "good air" at Drag Week this year. Have done some additional mods to the intake that dropped the ET into the 12.60's, have'nt re-dyno'd yet but it is faster and it suprisingly really mellowed out the cam. I think there was some turbulence happening in the intake path.
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post #8 of 15 (permalink) Old 09-17-2013, 08:04 PM Thread Starter
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Re: 351 C on the chassis dyno

Here is a link to the intake mod and based on the ET's at Drag Week, 11.68, the mod picked up about 20-25 hp.
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post #9 of 15 (permalink) Old 11-18-2013, 04:29 PM Thread Starter
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Re: 351 C on the chassis dyno

So after some more tuning at Drag Week the car went 12.39 back home in Denver.


427 TT, T-56, 9.02 @ 162
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post #10 of 15 (permalink) Old 11-19-2013, 02:54 AM
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Re: 351 C on the chassis dyno

Be careful blending Alcohol fuels since blends with more that 10% Ethanol are fairly unstable and can "Phase Separate" fairly quickly leaving you with a BIG mess!!

Nice Dyno numbers!!
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post #11 of 15 (permalink) Old 11-19-2013, 03:54 AM
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Re: 351 C on the chassis dyno

You might also trying an old Holley Strip Dominator if you can find one. They are the best single plane intake for the 351C. However, for the engine's big ports, displacement and rpm range, I think the cam is too big, and the dual plane is masking it. A smaller cam and the Strip Dominator would likely wake it up a bit.

Nice work on the intake! You've got it running good!
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post #12 of 15 (permalink) Old 11-21-2013, 12:06 AM
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Re: 351 C on the chassis dyno

Quote:
Originally Posted by n2omike View Post
You might also trying an old Holley Strip Dominator if you can find one. They are the best single plane intake for the 351C. However, for the engine's big ports, displacement and rpm range, I think the cam is too big, and the dual plane is masking it. A smaller cam and the Strip Dominator would likely wake it up a bit.

Nice work on the intake! You've got it running good!
know the differance between us? I post what I did.

the Holley Strip Dominator the best . OK where did you get that info? - or your test results .

try the BEST as the Parker Cleveland , 2nd place a modified Edel.Tq
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post #13 of 15 (permalink) Old 11-21-2013, 04:14 AM
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Re: 351 C on the chassis dyno

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Originally Posted by DanH View Post
know the differance between us? I post what I did.

the Holley Strip Dominator the best . OK where did you get that info? - or your test results .

try the BEST as the Parker Cleveland , 2nd place a modified Edel.Tq
^^^Troll^^^

The Holley Strip Dominator is the best intake for stock head castings... that will actually fit under the hood. They are very sought after, and not made any longer. Used ones generally bring around $400. Google info on them. Nice piece. Definite upgrade over a Torker.
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post #14 of 15 (permalink) Old 11-21-2013, 07:46 AM
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Re: 351 C on the chassis dyno

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Originally Posted by n2omike View Post
^^^Troll^^^

The Holley Strip Dominator is the best intake for stock head castings... that will actually fit under the hood. They are very sought after, and not made any longer. Used ones generally bring around $400. Google info on them. Nice piece. Definite upgrade over a Torker.
ok never done it Troll .

up grade over a torker .. guess you can't understand what number one means . I'll say it again- a Parker Funnel Web
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post #15 of 15 (permalink) Old 12-01-2013, 06:38 PM Thread Starter
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Re: 351 C on the chassis dyno

Here is what I know and the changes made:
On the chassis dyno it picked up 75 hp and 70 ft/lbs after the following changes:
C-4 to TKO-600
flat tappet to custom ground solid roller
torker to RPM Air Gap with mods
regular exhaust plate to MPG Stinger plate

I know there is less parasitic loss through the manual trans, but I doubt 75 hp. The short block is 15 years old and being freshened now, but for those pulls and drag week it was "old". I would question if the Strip Dominator would make as much low end torque and the RPM and since the cam peaks at about 6300 and I shift at 6500 the top end push from the single plane may not average out since I am not revving that high. It is a good pump gas street motor that runs mid 11's at lower elevations in a 3500 lb car. We can all argue about the "ideal" set up, but I did my research and am pleased, so far, with how it runs. Many people at drag week asked if it was a stroker because of how it ran and I can smile and honestly say it is a .030 over motor with stock rods and crank. Yes there are good bolts and shot peening but stock none the less.


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