300 Straight 6 Experts

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Apr 16, 2001 | 06:24 AM

DeenHylton

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From: Crooked River Ranch, OR

300 Straight 6 Experts

Hi guys, can anyone give me specs on the 300? I need Bore/Stroke,
Intake/Exhaust valve sizing, Carb or Fuel Injection CFM. Also are the valves in the head or in the block. I want to run the numbers through the "Dyno 2000" program for a fellow Ford Truck enthusiest. Thanks! Deen

Deen Hylton
Ford F250 460 C-6, K&N, Headers, Dual Exh.,Comp. Cams,Shift Kit
Pioneer CD w/Bose Speakers.
Other Passion: Blown 77 Corvette (Sorry Guys/Gals)
How I can afford to Drive the above: 93 GEO Metro

Apr 16, 2001 | 04:49 PM

StrangeRanger

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From: Copley, OH

300 Straight 6 Experts

Figures for a 96 are:
Bore: 4.00
Stroke: 3.98
I Valve: 1.78
E Valve: 1.56
Cam lift .249
Duration 192* @.050
Valve lift .398
CR 8.8
Head volume 68.4-65.4cc
Airflow? enough to support 84#/hr of fuel@WOT on the SEFI version, about 390 CFM which I beleve was the rating on the carbed version as well.
Valves are overhead, Ford hasn't built a production flathead engine in over 40 years.

You're going to find very low volumetric efficiencies are inherent in the long stroke engine, please post what you find though.

Apr 17, 2001 | 06:24 AM

DeenHylton

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Joined: Jan 2000

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From: Crooked River Ranch, OR

300 Straight 6 Experts

Strangeranger thanks! I'll get the info posted but it won't be untill next week...I leave for 5 days starting tomorrow.

Deen Hylton
Ford F250 460 C-6, K&N, Headers, Dual Exh.,Comp. Cams,Shift Kit
Pioneer CD w/Bose Speakers.
Other Passion: Blown 77 Corvette (Sorry Guys/Gals)
How I can afford to Drive the above: 93 GEO Metro

Apr 17, 2001 | 06:32 AM

TallPaul

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From: Metro Detroit (Redford)

300 Straight 6 Experts

Wow! Thanks Strange Ranger! I posted on several bulletin boards several months ago trying to get duration on that motor. I assume duration is the same for both intake and exhaust. Can you tell me one more thing though, what is the degrees before/after dead centers for the intake and exhaust?

Apr 17, 2001 | 03:45 PM

StrangeRanger

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From: Copley, OH

300 Straight 6 Experts

For starters there's a typo, it should be 194*@.050. Don't have timing events, but they have got to be VERY mild with that small a duration. I don't remember the source of the info either, it sure as hell wasn't Ford, they keep info on the 300 a very dark secret.

Apr 17, 2001 | 09:35 PM

mrlaserboy

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From: St. Paul, MN

300 Straight 6 Experts

I've got the Ford Engine shop manual for 1988 light duty trucks and it lists most of those specs listed above.

Dustin Siebert
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