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Old 01-26-2006, 08:45 PM   #1 (permalink)
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331 Stroker Specifications

Would love to hear from anyone and their engine build combination. I'm looking to build a 325-375 horse engine, very streetable, but fun to drive.

It will be running an 5 speed automatic, most likely 4r70W electronic one.

It's going in a 66 mustang coupe.
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Old 01-26-2006, 09:08 PM   #2 (permalink)
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331 Stroker Specifications

I would suggest something simular to ford's aluminum head GT40 motor that I have in my mustang. Although for the prive of those heads you could step up to some AFR 185's and make lots of power. A cam like the 274HR by comp cams (around 224 degrees duration at .050) and mild compression (about 9.5:1) to keep it pump gas friendly. Look an AFR's wesite and they have a bunch of dyno curves and links to other articles on simular engines.
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Old 01-26-2006, 10:06 PM   #3 (permalink)
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331 Stroker Specifications

Hey there,
Did you read about our 331 buildup in the archives?
http://www.fordmuscle.com/archives/2.../331/index.php

Great motor, still running strong. Very easy to build, a blast to drive in my '67 Mustang.
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Old 01-27-2006, 04:30 AM   #4 (permalink)
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331 Stroker Specifications

Check the "Dyno" forum for my 331 buildup. Fairly mild but still plenty of power.

Actually, there are a few other 331 builds over there as well.

Good luck.
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Old 01-27-2006, 05:18 AM   #5 (permalink)
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331 Stroker Specifications

I've read the 331 buildup, good article, but I love hearing from those who have them and especially those who have had them a long time. I'm concerned about durability.

I haven't looked at the dyno forum, I'll check it out.

thanks
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Old 01-27-2006, 06:41 AM   #6 (permalink)
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331 Stroker Specifications

Quote:
On 2006-01-27 05:18, msurebel wrote:
......I'm concerned about durability.....
The "durability" is dependent upon the quality of the parts and assembly methods, IMHO. Not much different than any other engine rebuilding project.


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Old 02-06-2006, 07:32 PM   #7 (permalink)
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331 Stroker Specifications

http://www.hopublishing.com/0files/331dyno.jpg

Crank 3.25
HYP KB Pistons 331
Comp Cams 281HR
SBF Typhoon Intake
650 Demon Carb, vacuum secondaries
HEI Distributer
1.6 Roller Rockers
stock heads

Our primary goal was to break into the 300hp range while paying more attention to torque. Stroking to 331 should get me a solid, reliable package. We kept the iron heads and block from the 1990 5.0 then replaced virtually everything else. This will go into a 1966 Galaxie that I want to use as a freeway cruiser. It will be coupled to a 4-speed AOD transmission.

My engine guys have their own dyno and hook up every engine before letting it out of the shop. I was in a hurry and didn't get a printout when they ran it. I hadn't witnessed a dyno run before and once it got over 300hp on the readout, I got lost in the excitement. At the final run, it was at 321hp and 385ft/lbs. Closer to 9-1 than 10-1 on compression. I'll ask for more specific details later.

I know how a wrench works, but I am not the guy you want turning one on your car. So I have to farm out the big mechanical operations. It will likely take another couple of weeks before the first road test.

<font size=-1>[ This Message was edited by: specnot on 2/7/06 10:33am ]</font>
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