new engine what should it rev at
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Registered User
Joined: Jun 2002
Posts: 28
From: rittman,ohio,us
new engine what should it rev at
hello, i'm biulding a 355 and was wondering what it should rev at?
to figure what hyd cam to get.
355 chevy dart pro1 alum 215 2.05/1.60 heads, weiand stealth intake, holley 750 double pumper, .275 dome pistons comp magnum roller rockers, pete jackson drive gear. turbo 400 trans
stage 3 shift kit hd sprags. 456 gear not sure what size stall conv. to get yet.
its a bracket car but want to street every once in a while.
should it rev between 6500-7000?
to figure what hyd cam to get.
355 chevy dart pro1 alum 215 2.05/1.60 heads, weiand stealth intake, holley 750 double pumper, .275 dome pistons comp magnum roller rockers, pete jackson drive gear. turbo 400 trans
stage 3 shift kit hd sprags. 456 gear not sure what size stall conv. to get yet.
its a bracket car but want to street every once in a while.
should it rev between 6500-7000?
Registered User
Joined: Dec 1998
Posts: 2,161
From: Haslett, Michigan
There's some missing information here to determine whether or not your combination is going to be streetable or not, and where it should 'rev'.
Firstly, a 215 cc head on a 355 means there will be a lazy intake port on anything but a street/strip motor with high stall converter. How high? Well, that depends on where your peak torque will end up. Before you can calculate that, however, you need to pick a cam configuration and cam profile. Before you can pick the cam profile, you need to figure out your compression ratio. You'll also want to determine if you need titanuim retainers and buffalo sized valvesprings to hold it together at speed.
Then, there's the question of the shortblock, and if it can hold together at speed. With a 215 cc head and talk of brackets, I'd assume you have selected the right parts for the shortblock, and had it balanced. Things like QUALITY fasteners like ARP rod bolts, and not generic bolts that come from a no-name package kit from PAW.
-------------------------------------------
So, questions in this order:
What's your compression ratio?
What's your cam configuration? hydraulic, solid, flat tappet, roller?
What's your roller rocker arm ratio?
What's your selected cam profile? (Call the experts at Comp Cams, Crane, or your cam manufacturer of choice)
Once you choose your cam, determined the proper valvesprings & retainers, and have calculated the engine torque curve, you should be able to make a more educated guess on the optimum torque converter stall, which is usually 500 to 800 RPM less than peak torque.
Firstly, a 215 cc head on a 355 means there will be a lazy intake port on anything but a street/strip motor with high stall converter. How high? Well, that depends on where your peak torque will end up. Before you can calculate that, however, you need to pick a cam configuration and cam profile. Before you can pick the cam profile, you need to figure out your compression ratio. You'll also want to determine if you need titanuim retainers and buffalo sized valvesprings to hold it together at speed.
Then, there's the question of the shortblock, and if it can hold together at speed. With a 215 cc head and talk of brackets, I'd assume you have selected the right parts for the shortblock, and had it balanced. Things like QUALITY fasteners like ARP rod bolts, and not generic bolts that come from a no-name package kit from PAW.
-------------------------------------------
So, questions in this order:
What's your compression ratio?
What's your cam configuration? hydraulic, solid, flat tappet, roller?
What's your roller rocker arm ratio?
What's your selected cam profile? (Call the experts at Comp Cams, Crane, or your cam manufacturer of choice)
Once you choose your cam, determined the proper valvesprings & retainers, and have calculated the engine torque curve, you should be able to make a more educated guess on the optimum torque converter stall, which is usually 500 to 800 RPM less than peak torque.
Last edited by ws6transam; Mar 26, 2004 at 02:55 PM.
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