AAM Billet Crank Girdle w/ Integrated Windage Tray
12-21-2008, 07:51 PM
#21
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+1 but o.e. girdle doesn't need much material removed for a stoker.for a couple bucks you could add some diamond windage sceen to the o.e for the same effect.if $ is not the issue it's a nice piece,if your a diy'er it's a waste of cash.
12-22-2008, 05:28 AM
#22
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Depending on stroke, the stock girdle will require quite a bit of clearancing for the rods. 86.4mm you need to clearance a little bit but 88mm there is quite a bit of material that needs to be removed.
12-22-2008, 11:05 AM
#23
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i've built 88 mm motors before and did not think it was excessive.granted you have to take a chunk out,but i don't think it was to the point of compromising the part.
Last edited by go-fast; 12-22-2008 at 11:20 AM.
12-22-2008, 01:00 PM
#30
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Hal, I bought one of your Girdles (from Marty) about a year ago for a motor we were building for a Canadian customer. Nice piece - very heavy duty.
We recently had a customer request one with a windage tray for a semi-street car, so we took the opportunity to develop one.
For some, its a nice addition. And its a hell of piece of work. I don't plan on selling a lot of them - the Girdle was just one of the more interesting CNC pieces we've done lately, so I figured I post it. And if someone wants one, we'll make it for em
12-24-2008, 05:47 AM
#33
which leads to my next question...............how short are the skirts on your pistons? with the stock pistons/ stock stroke, the skirt protrudes about .050 below the bottom of the cylinder at BDC.....and the counterweights are pretty close in there too. So, with these stroker cranks having larger counterwieghts too, how much shorter are the piston skirts than stock? they'd have to be significantly shorter since you are pulling the piston 6.6 mm (approx. .260") deeper in the bore.
12-24-2008, 06:39 AM
#34
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Here are a coupe of JEs w/ BC Crank before clearancing. I don't have the pistons measurements readily available, but the pictures show the modifications we do to retain the oil squirters. The red marks on the piston show were we cut away for clearance. We machine off about maybe 5mm (I don't remember exactly) of the skirt in order to retain the squirters.
We have not done an out-of-the-box stroker from BC using the CP pistons - so I am not sure about clearance/measurements. We've been using the BC/PE cranks for 3.8/4.15 set-ups with JE pistons. LOL, maybe we're making it harder than it has to be. But we prefer JEs for our builds.
Anyway, thought you might find these pics interesting.
We have not done an out-of-the-box stroker from BC using the CP pistons - so I am not sure about clearance/measurements. We've been using the BC/PE cranks for 3.8/4.15 set-ups with JE pistons. LOL, maybe we're making it harder than it has to be. But we prefer JEs for our builds.
Anyway, thought you might find these pics interesting.
12-24-2008, 07:36 AM
#35
clint,
thanks for the pictures. this motor has lots of stuff in a small space! even the stock pistons have a pretty high pin placement.....not leaving much room to move the pin upward in hopes of achieving a near stock rod ratio when going with a stroker. no way that's happening.
I don't know what rods companies are using with their stroker kits, but I wouldn't be surprised if the rods they use are in the 5.400" - 5.500" length. I'd be shocked if they were using anything close to the stock 5.680" length.
thanks for the pictures. this motor has lots of stuff in a small space! even the stock pistons have a pretty high pin placement.....not leaving much room to move the pin upward in hopes of achieving a near stock rod ratio when going with a stroker. no way that's happening.
I don't know what rods companies are using with their stroker kits, but I wouldn't be surprised if the rods they use are in the 5.400" - 5.500" length. I'd be shocked if they were using anything close to the stock 5.680" length.
12-24-2008, 07:39 AM
#36
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They are shelf stock length rods.
clint,
thanks for the pictures. this motor has lots of stuff in a small space! even the stock pistons have a pretty high pin placement.....not leaving much room to move the pin upward in hopes of achieving a near stock rod ratio when going with a stroker. no way that's happening.
I don't know what rods companies are using with their stroker kits, but I wouldn't be surprised if the rods they use are in the 5.400" - 5.500" length. I'd be shocked if they were using anything close to the stock 5.680" length.
thanks for the pictures. this motor has lots of stuff in a small space! even the stock pistons have a pretty high pin placement.....not leaving much room to move the pin upward in hopes of achieving a near stock rod ratio when going with a stroker. no way that's happening.
I don't know what rods companies are using with their stroker kits, but I wouldn't be surprised if the rods they use are in the 5.400" - 5.500" length. I'd be shocked if they were using anything close to the stock 5.680" length.
12-24-2008, 07:59 AM
#37
wow! how high are the pin placements on the pistons? moving it up .130" for an 88mm stoke crank? that doesnt leave any room for fiddling with the 2 compression ringland locations. the stock locations are pretty stout, but some people like to really drop the ringlands for heavily boosted engines.
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