plz help,,,1988 vette 350 hyd roller motor can i convert it to hyd non-roller?? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 05-21-2006, 10:07 PM
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plz help,,,1988 vette 350 hyd roller motor can i convert it to hyd non-roller??

hello i have a 350 sbc out of a 88 vette,,,it is a roller motor and im going to put a carb and intake on it and do away with the fuel injection and put it in my car,,,, here is my ???? can i convert that factory roller motor into a hyd, using a 515 hyd comp cam and lifters set??? the block has alum heads on it right now that is factory for the vette with screw in studs and 58cc chambers... plz let me know if this will work or will i run into trouble thanks

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Old 05-21-2006, 10:17 PM
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Yes, you can just put in a flat cam and flat lifters, but I want to know WHY??? Since you already have a roller block the cams and lifters are only a couple bucks more and light years ahead in power and reliability. Its really a free lunch, no catch unless you're planning on revving it to 8000.
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Old 05-21-2006, 11:01 PM
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I agree with Curtis73.
Why not run the hydraulic roller with a carb? I have a big hydraulic roller in my motorhome, it's an EFI engine converted to a carb.

If you CAN keep the hydraulic roller, I would for sure. Change the cam and springs if you want more oomph?
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Old 05-21-2006, 11:32 PM
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well guys i already have a 515/515 hyd cam and lifters... the cheapest roller cam i found was over $250 bucks and im on a budget build, and i love the way a 515 sounds... thanks for the info on the flat cam,, so your sure hyd will work???? i have heard that late model sbc blocks are diff on the inside now, is that true or no? thanks

Last edited by tiresmoke55; 05-22-2006 at 12:05 AM.
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Old 05-21-2006, 11:49 PM
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i heard that the oil holes for the cam was diff is this true??? thanks for any info

Last edited by tiresmoke55; 05-22-2006 at 12:04 AM.
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Old 05-22-2006, 02:53 AM
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I realize you are on a budget . . . but my advice is to wait wait wait. I wish I had a roller block! Look in the classifieds, on ebay, etc for find a roller cam. Lots more potential for power with them than a non roller.
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Old 05-22-2006, 03:26 AM
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Very true, Siggy... Don't let time and money force you into a sub-par build. You have incredible potential there with the roller block, and used roller cams are fine... not like used flat cams which are junk.

Seriously, if you are going to spend several hundred on upgrading the engine, what's a another $75?
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Old 05-22-2006, 06:15 AM
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I agree to wait on a hydraulic roller cam.

But your question is will a non-roller hydraulic cam work in a factory roller block. Yes it will, however, the upper timing chain sprocket is different for the two cams. The roller cam has a step-nose front with a tighter bolt spacing. In order to use a pre-87' timing chain, you will have to grind the front of the block where the factory roller cam retainer plate is mounted.

I saw an engine build where they had a factory roller block and were accidently shipped a standard non-roller cam. They used it anyway but had to grind the mounted boss shown in the picture below. This meant the factory roller option was eliminated.



Good luck, Ed www.edgesz28.com
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Old 05-22-2006, 06:56 AM
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wow!

Let me get this straight....you want to give up the superior lobe profiles, the reduced friction, and the increased power of a roller because you like the sound of a cam you already have? Sell the cam you have and use the money to stay with a roller cam. Get a profile that will give you the sound you must have.
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Old 05-22-2006, 07:22 AM
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I have a stock ZZ-4 roller cam that I took out of my new engine(ZZ-4) I will trade you for your fuel Injection, or sell me your FI, just a thought !!
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Old 05-22-2006, 08:43 AM
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Doesn't the ZZ-4 have a different firing order than an 88 SBC?
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Old 05-22-2006, 08:52 AM
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~~~~~~~~ 1-8-4-3-6-5-7-2 ~~~~~~~~~~
Works for this ZZ-4 !
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Old 05-22-2006, 11:24 AM
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Quote:
Originally Posted by cool rockin daddy
Let me get this straight....you want to give up the superior lobe profiles, the reduced friction, and the increased power of a roller because you like the sound of a cam you already have? Sell the cam you have and use the money to stay with a roller cam. Get a profile that will give you the sound you must have.

AAaaaaa-men.
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Old 05-22-2006, 11:04 PM
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Late '80s & early '90s Chevy trucks used flat-tappet cams in roller blocks, so yes, they will work.

But I'd still go with a roller, if only to avoid the lobe problems that seem to be more and more common these days.
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Old 05-23-2006, 09:44 AM
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well guys it seems that roller is the way to go,, ill break open my piggy bank and see what i can do thanks for all the info
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