Camshaft & Head Help

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Jul 1, 2001 | 09:55 AM

canuck

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Joined: Dec 2000

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Camshaft & Head Help

Hello.
I am building a 302 Tow motor for my truck and I have a question for your persual.

Has anybody used the Isky 256/262 Hydraulic camshaft in a tow application?

Would putting a set of 1969 351W head on would be benefical?

302 0.030" over
9.0 to 1 compression
256/262 Advertised Duration

.445"/.450" Lift

110 degrees Duration

Intake Performer RPM(Because I already have it!)

Thanks for your help!

Terry

Jul 1, 2001 | 12:27 PM

ummduh

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Joined: Jan 2000

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Camshaft & Head Help

Man, that seems like alot of cam for a 302, especially in a tow application. I know I'm no expert, but I had a 272degree in a 400 and it was way too much. Your cam isn't too much smaller and has alot less motor to work with..
Want your best bet? Call Isky and ask them what you should run, they have experts on this sorta stuff there to help.. So does Comp cams, and the others.. Hell you could even call summit, they're trained to help..

Anyways, why are you using a 302 as a tow engine? What kind of truck? Stick or auto? 302's in full size trucks usually aren't the best choice..

Matt

Jul 1, 2001 | 12:28 PM

ummduh

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Camshaft & Head Help

Oh yea, the 351 heads are a good choice, you can never go wrong with better breathing.

Jul 1, 2001 | 05:11 PM

Southwest

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Camshaft & Head Help

Make sure you check on the combustion chamber volume on the heads and find out what the compression ratio would be with the pistons you are using. If the chamber is bigger than the heads that came off and you use the same pistons you will lower your compression ratio. I made this mistake years ago but have learned alot since then.

Jul 1, 2001 | 07:14 PM

canuck

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Camshaft & Head Help

Thanks for your suggestions!

My Camshafts duration at .050 is 202I/208E. Not that radical as you might think.

Why I am going to a 302 for a tow motor? 90% of my driving is highway and 10% towing. Gas in Canada is $3.50 per gallon. Finally, the motor short block has been already built so...

Finally, it is not a small block chev!

Terry

Jul 2, 2001 | 05:19 PM

tetraruby

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Camshaft & Head Help

Ah..., give some credit to long stroke length. You want a gas efficient truck, that can tow once in a while? How bout' a 300-6. It'll out pull that 302 and save you some gas $$.

Jul 3, 2001 | 11:37 AM

BigBrownTruck

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Joined: Aug 1999

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Camshaft & Head Help

Whats your budget? Have you considered converting to Roller Cam like the modern 5.0's? I know that the cams are alot more expensive and the lifters are too. Ford makes a torque cam (roller tappet)for use in the Explorers/Mountaineers.

BBT