special cam for 383 stroker?
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On The Tree
Joined: Dec 2004
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special cam for 383? Well yesterday I went to talk to the machine shop trying to finally get my whole rebuild kick started, and i was going to pretty much supply most the parts because usually I can find them cheaper on the internet. He told me that for a stroker I am going to need a special type of camshaft. This is something i dont know anything about. I was just going to buy a regular cam that is meant for lt1's but he said a cam designed for the stock stroke wont work with a larger stroke. Something will hit or rub or something? I am confused.
Also we got talking pretty in depth and he said with these engines a stroker is not really needed. He said alot of times people dont even notice much of a difference with a larger stroke and i could lose the reliability of my engine. My thought on the stroker would be to still keep my torque if i went with a bigger cam that might have more of its power in the mid range to upper rpms. I want a pretty fast car but i also want to pull the big hill i live on at 25 m.p.h. in 4th gear like i can now. Any input on this also would be very helpful thanks!!!
Also we got talking pretty in depth and he said with these engines a stroker is not really needed. He said alot of times people dont even notice much of a difference with a larger stroke and i could lose the reliability of my engine. My thought on the stroker would be to still keep my torque if i went with a bigger cam that might have more of its power in the mid range to upper rpms. I want a pretty fast car but i also want to pull the big hill i live on at 25 m.p.h. in 4th gear like i can now. Any input on this also would be very helpful thanks!!!
Thread Starter
On The Tree
Joined: Dec 2004
Posts: 177
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Special cam for stroker? Hey Guys,
Well yesterday I went to talk to the machine shop trying to finally get my whole rebuild kick started, and i was going to pretty much supply most the parts because usually I can find them cheaper on the internet. He told me that for a stroker I am going to need a special type of camshaft. This is something i dont know anything about. I was just going to buy a regular cam that is meant for lt1's but he said a cam designed for the stock stroke wont work with a larger stroke. Something will hit or rub or something? I am confused.
Also we got talking pretty in depth and he said with these engines a stroker is not really needed. He said alot of times people dont even notice much of a difference with a larger stroke and i could lose the reliability of my engine. My thought on the stroker would be to still keep my torque if i went with a bigger cam that might have more of its power in the mid range to upper rpms. I want a pretty fast car but i also want to pull the big hill i live on at 25 m.p.h. in 4th gear like i can now. Any input on this also would be very helpful thanks!!!
Well yesterday I went to talk to the machine shop trying to finally get my whole rebuild kick started, and i was going to pretty much supply most the parts because usually I can find them cheaper on the internet. He told me that for a stroker I am going to need a special type of camshaft. This is something i dont know anything about. I was just going to buy a regular cam that is meant for lt1's but he said a cam designed for the stock stroke wont work with a larger stroke. Something will hit or rub or something? I am confused.
Also we got talking pretty in depth and he said with these engines a stroker is not really needed. He said alot of times people dont even notice much of a difference with a larger stroke and i could lose the reliability of my engine. My thought on the stroker would be to still keep my torque if i went with a bigger cam that might have more of its power in the mid range to upper rpms. I want a pretty fast car but i also want to pull the big hill i live on at 25 m.p.h. in 4th gear like i can now. Any input on this also would be very helpful thanks!!!
Teching In
Joined: Apr 2005
Posts: 36
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i'm guessing you don't have a cam now? with a decent size cam u will surge like a bitch at 25 mph in 4th.
i personally went with a forged 357 , for $$, reliability, and a broader powerband. for a stroker you would probably have to cut (notch) the block for the longer stroke.
i personally went with a forged 357 , for $$, reliability, and a broader powerband. for a stroker you would probably have to cut (notch) the block for the longer stroke.
10 Second Club
Joined: Mar 2004
Posts: 1,491
Likes: 1
From: norfolk va
I don't know about with a lt1. But i think your machinist is an idoit. Unless you fill the motor with junk parts, yhea it wont give you much more, but if you put some money into it and get some good stuff, Hell yhea you will notice a big difrence.
talk to ellis, he is the lt1 god
He will help you with your parts selection.
talk to ellis, he is the lt1 god
He will help you with your parts selection. I'm not "Ellis the LT1 God" LOL,,,, but in some cases you will need a small base circle camshaft for longer strokes. Most of the time you can get away with clearancing (grinding) the large ends of the connecting rods to clear the cam lobes.
What happens is when you increase the stroke, their are two rods that may contact the camshaft depending how the cam is ground etc... Usually happens with larger aftermarket rods unless they are "stroker friendly" by design. I can't believe the machinist recomended a small base circle cam over just grinding the rods down for clearance.
I'd highly suggest looking for a different machinist at any rate,,,, IMO. Did he happen to recomend a good 3/4 race cam by chance?
What are you goals for the car? That will go a long way in determining what parts you will need to meet your expectations.
Mike
What happens is when you increase the stroke, their are two rods that may contact the camshaft depending how the cam is ground etc... Usually happens with larger aftermarket rods unless they are "stroker friendly" by design. I can't believe the machinist recomended a small base circle cam over just grinding the rods down for clearance.
I'd highly suggest looking for a different machinist at any rate,,,, IMO. Did he happen to recomend a good 3/4 race cam by chance?
What are you goals for the car? That will go a long way in determining what parts you will need to meet your expectations.
Mike
Your machinist is an idiot. You don't have to have a special cam with the LT1 and a stroker. Stroking an LT1 is a good thing. If you use good parts, you won't loose the reliability and you will see/feel a difference in power. If I were you, I would think of finding another machine shop.
TECH Fanatic
Joined: Sep 2004
Posts: 1,288
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From: Somewhere between Auburn, AL and Columbus, GA
I think my cc305 probably surged at 25 mph in fourth, i cant even really remember what rpm that it would be at though. I would think that worst case is..downshift. There are a ton of off the shelf cams out there that have been used for ever and are considered somewhat mild in 383s like the cc306, gtp-6, gm 847 just to name a few.
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Thread Starter
On The Tree
Joined: Dec 2004
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Well hes not the machinist i was going to go with, just ONE guy i talked to inorder to get a quote, but thanks mikey for answering my question maturely. Saying the machinist is an idiot doesnt really help me out much. I think i still need to talk to shaun at S&M auto that everyone tells me is good. Does Ellis own his own machine shop?
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A stroked lt1 will definitely have a large increase in power over a stocker. I would look at a different machinist as well as it wont have reliability issues if you use quality parts. Somebody has been inhaling carbon monoxide a little too much if ya ask me.
Nate
Nate
I have been working with ellis ( THE LT1 GOD ) and we have pic a Comp Cams 224/232 110 LSA for my 383 Stroker engine. I would seriously get ahold of Ellis TwoFast4Luv to get more information on what cam to buy and the specs on it. It all depends on what you want to produce out of your motor!
Staging Lane
Joined: Mar 2005
Posts: 68
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Originally Posted by 93ZM6
Well yesterday I went to talk to the machine shop trying to finally get my whole rebuild kick started, and i was going to pretty much supply most the parts because usually I can find them cheaper on the internet. He told me that for a stroker I am going to need a special type of camshaft. This is something i dont know anything about. I was just going to buy a regular cam that is meant for lt1's but he said a cam designed for the stock stroke wont work with a larger stroke. Something will hit or rub or something? I am confused.
Also we got talking pretty in depth and he said with these engines a stroker is not really needed. He said alot of times people dont even notice much of a difference with a larger stroke and i could lose the reliability of my engine. My thought on the stroker would be to still keep my torque if i went with a bigger cam that might have more of its power in the mid range to upper rpms. I want a pretty fast car but i also want to pull the big hill i live on at 25 m.p.h. in 4th gear like i can now. Any input on this also would be very helpful thanks!!!
Also we got talking pretty in depth and he said with these engines a stroker is not really needed. He said alot of times people dont even notice much of a difference with a larger stroke and i could lose the reliability of my engine. My thought on the stroker would be to still keep my torque if i went with a bigger cam that might have more of its power in the mid range to upper rpms. I want a pretty fast car but i also want to pull the big hill i live on at 25 m.p.h. in 4th gear like i can now. Any input on this also would be very helpful thanks!!!
and see. The HP does not increase by HUGE amounts, but the torque is through the roof. This is what makes a car feel fast on the street.......and I get down the track pretty well too. The only disadvantage is traction is hard to come by. 
Originally Posted by N20LT4Bird
AS far as the stroker not making a difference......BS. Come take a ride and see. The HP does not increase by HUGE amounts, but the torque is through the roof.
and see. The HP does not increase by HUGE amounts, but the torque is through the roof.copied from : http://www.gmhightechperformance.com...gmhtp_special/
On the issue of clearancing, Nick says, "Different clearancing is done depending on the reciprocating component combination. For example, an Eagle rod will fit in the block pretty well, but an Oliver rod is actually wider so we need to do more clearancing on the pan rails. We don't like to clearance any more than is absolutely necessary, because of stress concerns and also because there is a water jacket right behind there. If you dig through, it is difficult to repair, and I don't think there is any way to do it exactly right. We do it first for this reason. Or the other scenario is if you're doing hand work down here and slip and make glazes and some marks in the cylinder bore, you can still overbore the block to take out any mistakes."
Hope this helps a little, good luck...oh yeah go solid roller cam
Last edited by BRETTINATOR; May 5, 2005 at 10:47 AM.
