383 stroker
Thread Starter
Instructor
Joined: Oct 2007
Posts: 137
Likes: 0
From: Nottingham
Any thoughts?
Thanks,
Wev
Racer
Joined: Jun 2005
Posts: 409
Likes: 13
From: Lavonia Georgia
I went with a small base circle cam on mine. Normally, if you do this, you will not hit. As long as your shop is competent, this will be business as usual for them.
Intermediate
Joined: Mar 2006
Posts: 42
Likes: 0
From: PENDERGRASS GA
I did not use a small base circle cam....and what exactly is that??? my rods did hit my cam just a little and I had to grind on the rod bolt heads for some minor clearancing after i had it all balanced and it did not effect the balance of the motor as far as i can tell driving it. i used eagle 383 crank, 6" scat rods, and kb pistons. Are the small base circle cams just smaller cams?
Racer
Joined: Jun 2005
Posts: 409
Likes: 13
From: Lavonia Georgia
I did not use a small base circle cam....and what exactly is that??? my rods did hit my cam just a little and I had to grind on the rod bolt heads for some minor clearancing after i had it all balanced and it did not effect the balance of the motor as far as i can tell driving it. i used eagle 383 crank, 6" scat rods, and kb pistons. Are the small base circle cams just smaller cams?
Last edited by 68vertible; Jan 28, 2008 at 10:42 AM.
Thread Starter
Instructor
Joined: Oct 2007
Posts: 137
Likes: 0
From: Nottingham
I did not use a small base circle cam....and what exactly is that??? my rods did hit my cam just a little and I had to grind on the rod bolt heads for some minor clearancing after i had it all balanced and it did not effect the balance of the motor as far as i can tell driving it. i used eagle 383 crank, 6" scat rods, and kb pistons. Are the small base circle cams just smaller cams?
Do the new type of 'cap screw' give bigger clearances? id be doubious grinding bits away from one of teh main points of the rotating setup, wont that weaken them?
Intermediate
Joined: Mar 2006
Posts: 42
Likes: 0
From: PENDERGRASS GA
Well I thought the same, actually grinding on a new set of rods that I just spend $240 on them but, I didn't just jump into this as a blind idiot...I read a book on exactly how to build a small block stroker.
"How to Build Big-Inch Chevy Small Blocks"
Also read an article in chevy high performance where they did exactly the same thing i did, after balancing. So the method is out there weather its a shade tree mechanic type procedure or whatever i didn't just come up with it on my own, im not that brave to start grinding on new parts.
"How to Build Big-Inch Chevy Small Blocks"
Also read an article in chevy high performance where they did exactly the same thing i did, after balancing. So the method is out there weather its a shade tree mechanic type procedure or whatever i didn't just come up with it on my own, im not that brave to start grinding on new parts.
Thread Starter
Instructor
Joined: Oct 2007
Posts: 137
Likes: 0
From: Nottingham
Well I thought the same, actually grinding on a new set of rods that I just spend $240 on them but, I didn't just jump into this as a blind idiot...I read a book on exactly how to build a small block stroker.
"How to Build Big-Inch Chevy Small Blocks"
Also read an article in chevy high performance where they did exactly the same thing i did, after balancing. So the method is out there weather its a shade tree mechanic type procedure or whatever i didn't just come up with it on my own, im not that brave to start grinding on new parts.
"How to Build Big-Inch Chevy Small Blocks"
Also read an article in chevy high performance where they did exactly the same thing i did, after balancing. So the method is out there weather its a shade tree mechanic type procedure or whatever i didn't just come up with it on my own, im not that brave to start grinding on new parts.
Sorry i wsnt implying that you jupmed in a started taking chunks out of it, just suprised that after a delicate operation of balancing you went for it.
I take my hat of to your skills at undertaking this and succeding
I will have to get the book and read up, thanks
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Drifting
Joined: Aug 2004
Posts: 1,883
Likes: 124
From: Lubbock TX
A paper clip is steel and weighs a gram. I don't know that I've ever seen the need to take more than a gram or two off of the shoulder of a rod for balancing. Balancing is a best guess anyway - part of the assembly rotates, part reciprocates, we THINK we know how to divide those up, but how about the oil? It's filling the oil passages on the crank plus clinging to everything in the crankcast. David Reher calls it a "monsoon" and that's what I imagine it looks like. How much weight do you add for oil? If you swap pistons, that's a rebalance. Grinding a gram or two off of a rod shoulder isn't going to make a bit of difference - we did the same thing on my kid's stroker and it's smooth as silk to 6K and we checked the bearings when we swapped trucks with it and they look brand new at 10,000 miles. Who knows, we might have gotten the balance better than the shop 
Best trick to check clearances is to use a piece of solder, .100 diameter. You can put it between the cam and rods and it'll smash it as things turn so you can figure out exactly how much clearance you have. It's so soft that it won't mar the cam at all.
Best trick to check clearances is to use a piece of solder, .100 diameter. You can put it between the cam and rods and it'll smash it as things turn so you can figure out exactly how much clearance you have. It's so soft that it won't mar the cam at all.
Thread Starter
Instructor
Joined: Oct 2007
Posts: 137
Likes: 0
From: Nottingham
Any way £5.50 is not bad :-)
Nice tip on the clearing tho, thanks for teh advice guys, im still pondering wether to go with the eagle kit and do some work or scat, i see some good prices on each.
What i find difficult to understand is the apparently same kits are advatised at 400hp, 450hp and upto 500hp, the same kit with same compression ratio's and parts?
Do the new type of 'cap screw' give bigger clearances?
Last edited by wev; Feb 1, 2008 at 08:40 AM.
