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Old 01-09-2020, 11:06 AM
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Cam and lifter set up

I have a 1987 goodwrench and I am swapping out stock intake for a rpm performer intake on it and want to swap out stock cam for a nice mild one I'm really not interested in gas milage as I only drive it on weekends and such but I dont want to go to big and dont want to be to small car does have a stall converter and I run purple hornies right off the headers and ideas as to which cam I should get? Thanks

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Old 01-09-2020, 11:24 AM
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What ever camshaft you choose, do not get one with more than 180 to 200 degrees intake and exhaust valve duration, unless you are planning on replacing your “freeway flyer” gears to a lower rear gear ratio. If you don’t change the rear end ratio to 3.70 or 4.10:1 you will throw rocks at your vehicle because of the way it performs.

Good gas mileage and high performance are not compatible.
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Old 01-09-2020, 01:03 PM
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Quote:
Originally Posted by MouseFink View Post

Good gas mileage and high performance are not compatible.
They can be had, but cost a lot.

Comp XE268 is a pretty good choice with Performer intake.
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Old 01-09-2020, 02:45 PM
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I agree with the Comp XE268H recommendation. It holds very good bottom end torque while producing good strong ponies at a moderate top end under 6000. It will support going higher in amounts and revs if you choose to build into ithe engine down the road.

It is quite compatible with a wide range of heads producing torque peaks of about 370 ft/lbs around 3700 and about 330 hp around 5200 with Goodwrench heads. With a set of older style dual quench heads with your intake it will add about 10 ft/lbs at the same revs and pump the power peak to about 350 around 5500 RPM. With a set of modern heads with this cam and your intake you can expect around 390 ft/lbs at about the same revs as the previous peaks with about 370 hp around 5600 RPM.

Selective mods especially with ported GM Vortecs or aftermarket heads like using the Performer RPM intake, a 750 Holley or 800 Edlebrock carb, 1.6 roller rockers on 7/8ths studs or 3/8ths with a girdle dinking around with piston crown shapes, etc with this cam you can push horespower peaks well into the 420's. So this cam not only is very compatible with a wide ramge of heads but also allows for a lot of growth if or when you want to play with rocker arms, intake manifolds, carburators or self learning EFI, etc.

Bogie
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Old 01-09-2020, 04:56 PM
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If I could make another option of a similar cam I would go with the lunati voodoo cam below if your going flat tappet as I have read some people say it makes a little bit more then the comp xe268 and also is easier on shutting the valves but that is what I read so don't take it etched in stone but I have used a lot of lunati voodoo hydraulic roller cams and have had excellent luck with them over the years while making good vacuum on the milder ones and plenty of power.

https://www.lunatipower.com/cam-k-kit-cs-v268h10.html


https://www.lunatipower.com/voodoo-h...k-268-276.html
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Old 01-09-2020, 06:20 PM
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use a roller cam
200 is minimun not maximum
210 is nice
what is the cr of your engine
If its below 9:1 consider a tighter Intake center line, IE: 102 to 105
108 lobe separation is good imo
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Old 01-10-2020, 07:29 AM
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The 1965-1968 Chevrolet L79 engine was equipped with a hydraulic lifter camshaft with 222 degrees duration and .447” valve lift on both the wintake and exhaust, The Comp Cams nostalgia duplicate of that camshaft is a 12-106-3 (151H) .

You could not order a Chevrolet with a L79 engine without a 4.11:1 Positraction as part of the option.

That camshaft is GM-3863151 (discontinued) or now a Comp Cams 12-106-3 Nostalgia Duplicate.

I have the GM-3863151 camshaft in my 1962 Chevrolet with a 350 CI engine and 4.11:1 positraction. It is the best hydraulic lifter 327 or 350 SB Chevrolet Camshaft produced by GM. I shift the original Borg Warner T10 4-speed transmission at 5,300 RPM without valve float. You will not need bone crushing valve springs with GM “Soft Touch” camshafts or their duplicates.
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Old 01-10-2020, 10:56 AM
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I'll ask you the same thing that Moosecountry asked, what is the static compression ratio of the motor?
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