What cam?
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
What cam?
Hey guys, I'm putting my aluminum heads on my stock bottom ended crate motor. It's the standard GM 350 crate motor that I've had Vortecs on. Anyway, the heads are Pro Topline 200cc/64cc chambers. I have Dynomax ceramic coated headers, MSD 6A box, billet distributor and blaster 2 coil, BTO Stage 3 200R4/2200 stall, Edelbrock 600, 3.55 rear gears dual 2.5" exhaust with Flowmaster 40's. I was wanting to wait to put these heads on a stroker, but going through a nasty divorce and have to sell the Vette or my truck. I love my Silverado, but those are alot easier to come by.
The cam I have right now is a Comp Cams 256 http://www.compcams.com/Technical/Dy...56H-10_001.asp
This obviously isn't enough cam for everything else and I've considered a Lunati something or other......The torque of my current cam is pretty respectable considering it's so mild. I want an Air Gap manifold and roller rockers. Would it be silly to keep my cam and just go with 1.6 rollers? I don't really have any money to be spending except for what I am getting from selling my Vortecs. Keep in mind, I will be driving this for a while, even in the occasional snow here in OKC, so it needs to be somewhat civilized.
The cam I have right now is a Comp Cams 256 http://www.compcams.com/Technical/Dy...56H-10_001.asp
This obviously isn't enough cam for everything else and I've considered a Lunati something or other......The torque of my current cam is pretty respectable considering it's so mild. I want an Air Gap manifold and roller rockers. Would it be silly to keep my cam and just go with 1.6 rollers? I don't really have any money to be spending except for what I am getting from selling my Vortecs. Keep in mind, I will be driving this for a while, even in the occasional snow here in OKC, so it needs to be somewhat civilized.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Would it be silly to keep my cam and just go with 1.6 rollers?
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
Originally Posted by Ganey
You can go ahead & add the 1.6 especially on the ex. That would give you some experience w/ the new setup & maybe it would be exactly what you want.
Thanks everyone. Hey Ganey, what exactly do you think would be the benefit of just changing the rockers? I know it will increase lift, but will I notice any difference?
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
Anyone care to take a stab at what kind of differences I will see from the S/R torquers Comp has listed on their dyno sheet if I just change the heads to 200cc aluminum heads? I'm thinking the torque will decrease some, but the hp should go up.
BTW: the car doesn't lope, it sounds more like it has alot higher compression than it really does-should be about 9.4:1 with the .015" head gaskets.....Even idleing at 700rpm it sounds like it is idling at 1500 rpm. I'm not sure if that's because of the cam itself or the combination of that and the flowmasters. I know that sounds stupid, but it's hard to explain and no, I'm not a mechanical retard....
BTW: the car doesn't lope, it sounds more like it has alot higher compression than it really does-should be about 9.4:1 with the .015" head gaskets.....Even idleing at 700rpm it sounds like it is idling at 1500 rpm. I'm not sure if that's because of the cam itself or the combination of that and the flowmasters. I know that sounds stupid, but it's hard to explain and no, I'm not a mechanical retard....
Last edited by 79VetteMike; Oct 22, 2004 at 02:16 PM.
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Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
Originally Posted by mountainmotor
Hello from another Okie ...... land of great college football 
What compression will that engine have ? You have the gear for more cam , if you have the compression to allow for it I'd stick a larger one in
What compression will that engine have ? You have the gear for more cam , if you have the compression to allow for it I'd stick a larger one in
According to the buildup that CHP did, it should be 9.4:1 with 64cc combustion chambers and and .015" head gaskets.
Le Mans Master
Joined: Oct 2002
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From: Las Vegas - Just stop perpetuating myths please.
Originally Posted by 79VetteMike
Hey guys, I'm putting my aluminum heads on my stock bottom ended crate motor. It's the standard GM 350 crate motor that I've had Vortecs on. Anyway, the heads are Pro Topline 200cc/64cc chambers. I have Dynomax ceramic coated headers, MSD 6A box, billet distributor and blaster 2 coil, BTO Stage 3 200R4/2200 stall, Edelbrock 600, 3.55 rear gears dual 2.5" exhaust with Flowmaster 40's. I was wanting to wait to put these heads on a stroker, but going through a nasty divorce and have to sell the Vette or my truck. I love my Silverado, but those are alot easier to come by.
The cam I have right now is a Comp Cams 256 http://www.compcams.com/Technical/Dy...56H-10_001.asp
This obviously isn't enough cam for everything else and I've considered a Lunati something or other......The torque of my current cam is pretty respectable considering it's so mild. I want an Air Gap manifold and roller rockers. Would it be silly to keep my cam and just go with 1.6 rollers? I don't really have any money to be spending except for what I am getting from selling my Vortecs. Keep in mind, I will be driving this for a while, even in the occasional snow here in OKC, so it needs to be somewhat civilized.
The cam I have right now is a Comp Cams 256 http://www.compcams.com/Technical/Dy...56H-10_001.asp
This obviously isn't enough cam for everything else and I've considered a Lunati something or other......The torque of my current cam is pretty respectable considering it's so mild. I want an Air Gap manifold and roller rockers. Would it be silly to keep my cam and just go with 1.6 rollers? I don't really have any money to be spending except for what I am getting from selling my Vortecs. Keep in mind, I will be driving this for a while, even in the occasional snow here in OKC, so it needs to be somewhat civilized.
Take it or leave it but heres what i would do. Have larger vlvs put in those vortec heads, bowl blended and chambers polished out to maybe 70cc - i think ur c.r. is close to safe limit. Cut guides for new vlv springs and screw in studs with guide plates. U can run 1.6 rockers once new hi-po springs installed - both intk & exh for short single pattern cams. Upgraded vlv seals too. Steel shim gaskets again - hey they worked fine didn't they? About $500. Try Performance Chevy Products in Phoenix, AZ (602)254-9586.For a cam i like Isky (http://www.iskycams.com/onlinecatalog.html). And a Isky 264 Mega #201264 cam or the cam kit #200264 would be my choice. Wish i had this combo as it would make a great street 350". And may save u a few bucks too.
Hope this helps. cardo0
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
Originally Posted by cardo0
A divorce can be expense and sorry to read ur misfortune. But those big ruuner heads can just make worse if used for a dd. And those 200cc runners are not recommended (David Vizard) for a 350" mtr. Big heads and stock cast pistons are not a good match for a street mtr. Bad throttle response. High rpm power will bust cast pistons. That cam should be fine on the street but not a good match for those heads.
Take it or leave it but heres what i would do. Have larger vlvs put in those vortec heads, bowl blended and chambers polished out to maybe 70cc - i think ur c.r. is close to safe limit. Cut guides for new vlv springs and screw in studs with guide plates. U can run 1.6 rockers once new hi-po springs installed - both intk & exh for short single pattern cams. Upgraded vlv seals too. Steel shim gaskets again - hey they worked fine didn't they? About $500. Try Performance Chevy Products in Phoenix, AZ (602)254-9586.
For a cam i like Isky (http://www.iskycams.com/onlinecatalog.html). And a Isky 264 Mega #201264 cam or the cam kit #200264 would be my choice. Wish i had this combo as it would make a great street 350". And may save u a few bucks too.
Hope this helps. cardo0
Take it or leave it but heres what i would do. Have larger vlvs put in those vortec heads, bowl blended and chambers polished out to maybe 70cc - i think ur c.r. is close to safe limit. Cut guides for new vlv springs and screw in studs with guide plates. U can run 1.6 rockers once new hi-po springs installed - both intk & exh for short single pattern cams. Upgraded vlv seals too. Steel shim gaskets again - hey they worked fine didn't they? About $500. Try Performance Chevy Products in Phoenix, AZ (602)254-9586.For a cam i like Isky (http://www.iskycams.com/onlinecatalog.html). And a Isky 264 Mega #201264 cam or the cam kit #200264 would be my choice. Wish i had this combo as it would make a great street 350". And may save u a few bucks too.
Hope this helps. cardo0
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
I plan on using the aluminum heads for a bigger motor in the future, so I am not getting rid of them. I can deal with some decreased performance for a while. I have to sell something, because I am in desperate need of the cash. I am trying to hang on to something and don't want to have to re-buy nice heads in the future if I can make due with the ones I have right now....
