Noob question on the BC stroker Kit.

D-NaSty · 09-03-2010, 03:49 PM

I was told by someone at BC that before assemblying the motor, you have to grind down some the lower bore wall. He told me that because of the longer 83mm stroke, there will be some interfence with the bore walls.

Has anyone with the BC stroker kit done this? If so, where exactly does this need to be done and do you have pictures?

I also contact BC, but I thought I would check here too

-Dan

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MartinSTi05 · 09-03-2010, 05:45 PM

You have to clearan e for the tod bolts.

Homemade WRX · 09-03-2010, 08:29 PM

I think he was trying to say for the rod bolts...it's really simple to toss on a mill and do nicely or you can just grind it out.

Do it prior to machining and honing.

D-NaSty · 09-04-2010, 02:29 PM

Where does the interfence happen? Have any pics?

MartinSTi05 · 09-05-2010, 01:37 PM

Sorry, damn phone makes it hard to type in an intelligible manner.

I dont' have a pic now. However the head of the rod bolt tends to want to make contact with the case. The easiest way to clearance is:

Attach two rods and drop crank into block halve with main bearings installed, throw two pistons on without rings and check for interference and clearance as necessary, and then switch halves. If you are really paranoid you can bolt the case halves together and install rods/pistons without rings and turn the whole works over by hand. You want a minimum of .060" between any part of the case and any part of the rotating assy.

D-NaSty · 09-07-2010, 01:05 PM

I will do that. Do you remember if you had to grind alot off? Pics would still be great if you could find some, but thanks for all the help

Sinister redlines · 09-07-2010, 02:39 PM

My case is apart right now I will see if I can get some pics for ya. I think we took about .060" off the sleeve side of the case and cleaned up some for the throws in the ribing..

D-NaSty · 09-07-2010, 03:12 PM

Thanks pics would be great

D-NaSty · 01-27-2011, 10:00 AM

bump... i still havent done this.... I have put the block together to see where the interfence is, and found out there is a lot. Looks like im going to have to grind off some of the bottom of the wall. Is this what everyone else did? I'm just nervous to do this.

Homemade WRX · 01-27-2011, 10:05 AM

Yes, you have to clearance the block. I haven't done an 83mm setup since 06 or 07 so I don't recall where exactly they hit. I'm trying to recall if the webbing clearance was needed for the aluminum rod fitment or for the 83mm crank.

AQ Motorsports · 01-27-2011, 01:42 PM

Too bad we tossed out our junk block - I would have been able to take pictures of everything. If you can find a local machine shop who's done a couple of strokers they should be able to do it quickly and easily.

MartinSTi05 · 01-27-2011, 02:29 PM

Quote:

Originally Posted by Harman Motive, Inc.

Too bad we tossed out our junk block - I would have been able to take pictures of everything. If you can find a local machine shop who's done a couple of strokers they should be able to do it quickly and easily.

I have the remnants of my 2.7 laying around. I will grab some pics for you.

D-NaSty · 01-27-2011, 08:34 PM

thanks martinSTi05!!!

D-NaSty · 02-01-2011, 02:18 PM

did everyone just use a grinding stone?

MartinSTi05 · 02-01-2011, 02:52 PM

Di grinder/carbide burr/flap wheel. Or a Bridgeport.

BTW still working on picks.

Homemade WRX · 02-01-2011, 03:08 PM

Quote:

Originally Posted by D-NaSty

did everyone just use a grinding stone?

I've used carbide cutters on Hondas. Used a Bridgeport on the EJ block.

STi stroker 55 · 02-03-2011, 04:35 PM

Im also doing a BC stroker and would like to see how a knoched block looks cause Im having a shop do it and its there first time doing a stroker. Like to see some pics.

Homemade WRX · 02-03-2011, 05:21 PM

you're taking it to a machine shop that's never clearanced a block and they can't figure out the simply step by themselves?

...go somewhere else.

STi stroker 55 · 02-03-2011, 07:32 PM

Quote:

Originally Posted by Homemade WRX

you're taking it to a machine shop that's never clearanced a block and they can't figure out the simply step by themselves?

...go somewhere else.

No what I meant by that is my builder never assembeled a stroker yet and I just want to see a pic of how a knoched block looks so when I go there I have some kind of clue. Im being really paranoid about this build and want to make sure that everything is done right. I also ask alot of questions so that I know what his every step is when putting back together my long block and that I know every little detail about my build.

I cant wait to get in my ride

Homemade WRX · 02-03-2011, 07:37 PM

well I don't have any pics of the clearance work done.

So I assume if you are seeing the block halves apart, you're doing the assembly?

MartinSTi05 · 02-03-2011, 08:47 PM

Tommorrow I will have them. Sorry for the delay gents.

RacePartsGuy · 02-04-2011, 10:16 PM

The piston skirts hit the main web at BDC... Manley has a complete rotating kit that clears, 83mm with the correct skirt design to clear.

RPG

D-NaSty · 02-07-2011, 12:57 PM

bump for some pics

MartinSTi05 · 02-07-2011, 01:27 PM

here are your pics. It appears to me that no clearance work was done to accommodate the rod bolts. However ther may have been some work done to accommodate the throws of the crank. You can see the area I am talking about in the third pic directly in between the cylinders.

Homemade WRX · 02-07-2011, 02:54 PM

you can see it a little in the first pics too. Just to clearance the cap.

09-03-2010, 03:49 PM	#1
D-NaSty Scooby Newbie Member#: 156456 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Rochester NY Vehicle: 2005 92x aero Blue	Noob question on the BC stroker Kit. I was told by someone at BC that before assemblying the motor, you have to grind down some the lower bore wall. He told me that because of the longer 83mm stroke, there will be some interfence with the bore walls. Has anyone with the BC stroker kit done this? If so, where exactly does this need to be done and do you have pictures? I also contact BC, but I thought I would check here too -Dan * Registered users of the site do not see these ads.

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09-03-2010, 05:45 PM	#2
MartinSTi05 Scooby Specialist Member#: 145145 Join Date: Apr 2007 Chapter/Region: MWSOC Location: Rockford, Il Vehicle: 2006 wrx STi	You have to clearan e for the tod bolts.

09-03-2010, 08:29 PM	#3
Homemade WRX Scooby Guru Member#: 33782 Join Date: Mar 2003 Chapter/Region: MAIC Location: 3MI Racing LLC Vehicle: 96 bastard child search FIRST, then PM!!!	I think he was trying to say for the rod bolts...it's really simple to toss on a mill and do nicely or you can just grind it out. Do it prior to machining and honing.

09-04-2010, 02:29 PM	#4
D-NaSty Scooby Newbie Member#: 156456 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Rochester NY Vehicle: 2005 92x aero Blue	Where does the interfence happen? Have any pics?

09-05-2010, 01:37 PM	#5
MartinSTi05 Scooby Specialist Member#: 145145 Join Date: Apr 2007 Chapter/Region: MWSOC Location: Rockford, Il Vehicle: 2006 wrx STi	Sorry, damn phone makes it hard to type in an intelligible manner. I dont' have a pic now. However the head of the rod bolt tends to want to make contact with the case. The easiest way to clearance is: Attach two rods and drop crank into block halve with main bearings installed, throw two pistons on without rings and check for interference and clearance as necessary, and then switch halves. If you are really paranoid you can bolt the case halves together and install rods/pistons without rings and turn the whole works over by hand. You want a minimum of .060" between any part of the case and any part of the rotating assy.

09-07-2010, 01:05 PM	#6
D-NaSty Scooby Newbie Member#: 156456 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Rochester NY Vehicle: 2005 92x aero Blue	I will do that. Do you remember if you had to grind alot off? Pics would still be great if you could find some, but thanks for all the help

09-07-2010, 02:39 PM	#7
Sinister redlines Scooby Specialist Member#: 120641 Join Date: Jul 2006 Chapter/Region: NWIC Location: Port Orchard, WA Vehicle: 05 HTA3586,BB 2.5L CGM	My case is apart right now I will see if I can get some pics for ya. I think we took about .060" off the sleeve side of the case and cleaned up some for the throws in the ribing..

09-07-2010, 03:12 PM	#8
D-NaSty Scooby Newbie Member#: 156456 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Rochester NY Vehicle: 2005 92x aero Blue	Thanks pics would be great

01-27-2011, 10:00 AM	#9
D-NaSty Scooby Newbie Member#: 156456 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Rochester NY Vehicle: 2005 92x aero Blue	bump... i still havent done this.... I have put the block together to see where the interfence is, and found out there is a lot. Looks like im going to have to grind off some of the bottom of the wall. Is this what everyone else did? I'm just nervous to do this.

01-27-2011, 10:05 AM	#10
Homemade WRX Scooby Guru Member#: 33782 Join Date: Mar 2003 Chapter/Region: MAIC Location: 3MI Racing LLC Vehicle: 96 bastard child search FIRST, then PM!!!	Yes, you have to clearance the block. I haven't done an 83mm setup since 06 or 07 so I don't recall where exactly they hit. I'm trying to recall if the webbing clearance was needed for the aluminum rod fitment or for the 83mm crank.

01-27-2011, 01:42 PM	#11
AQ Motorsports NASIOC Vendor Member#: 60836 Join Date: Apr 2004 Chapter/Region: SCIC Location: Torrance, CA Vehicle: 2006 Mod Class STI TIMEATTACK!!	Too bad we tossed out our junk block - I would have been able to take pictures of everything. If you can find a local machine shop who's done a couple of strokers they should be able to do it quickly and easily.

01-27-2011, 08:34 PM	#13
D-NaSty Scooby Newbie Member#: 156456 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Rochester NY Vehicle: 2005 92x aero Blue	thanks martinSTi05!!!

02-01-2011, 02:18 PM	#14
D-NaSty Scooby Newbie Member#: 156456 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Rochester NY Vehicle: 2005 92x aero Blue	did everyone just use a grinding stone?

02-01-2011, 02:52 PM	#15
MartinSTi05 Scooby Specialist Member#: 145145 Join Date: Apr 2007 Chapter/Region: MWSOC Location: Rockford, Il Vehicle: 2006 wrx STi	Di grinder/carbide burr/flap wheel. Or a Bridgeport. BTW still working on picks.

02-03-2011, 04:35 PM	#17
STi stroker 55 Scooby Newbie Member#: 263724 Join Date: Nov 2010 Chapter/Region: MWSOC Location: IL Vehicle: 07 Subaru WRX STi	Im also doing a BC stroker and would like to see how a knoched block looks cause Im having a shop do it and its there first time doing a stroker. Like to see some pics.

02-03-2011, 05:21 PM	#18
Homemade WRX Scooby Guru Member#: 33782 Join Date: Mar 2003 Chapter/Region: MAIC Location: 3MI Racing LLC Vehicle: 96 bastard child search FIRST, then PM!!!	you're taking it to a machine shop that's never clearanced a block and they can't figure out the simply step by themselves? ...go somewhere else.

02-03-2011, 07:37 PM	#20
Homemade WRX Scooby Guru Member#: 33782 Join Date: Mar 2003 Chapter/Region: MAIC Location: 3MI Racing LLC Vehicle: 96 bastard child search FIRST, then PM!!!	well I don't have any pics of the clearance work done. So I assume if you are seeing the block halves apart, you're doing the assembly?

02-03-2011, 08:47 PM	#21
MartinSTi05 Scooby Specialist Member#: 145145 Join Date: Apr 2007 Chapter/Region: MWSOC Location: Rockford, Il Vehicle: 2006 wrx STi	Tommorrow I will have them. Sorry for the delay gents.

02-04-2011, 10:16 PM	#22
RacePartsGuy Scooby Newbie Member#: 246644 Join Date: May 2010 Chapter/Region: Tri-State Location: East Brunswick, NJ Vehicle: 2008 Forester XT STI CGM-360HP/365TQ	The piston skirts hit the main web at BDC... Manley has a complete rotating kit that clears, 83mm with the correct skirt design to clear. RPG

02-07-2011, 12:57 PM	#23
D-NaSty Scooby Newbie Member#: 156456 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Rochester NY Vehicle: 2005 92x aero Blue	bump for some pics

02-07-2011, 01:27 PM	#24
MartinSTi05 Scooby Specialist Member#: 145145 Join Date: Apr 2007 Chapter/Region: MWSOC Location: Rockford, Il Vehicle: 2006 wrx STi	here are your pics. It appears to me that no clearance work was done to accommodate the rod bolts. However ther may have been some work done to accommodate the throws of the crank. You can see the area I am talking about in the third pic directly in between the cylinders.

02-07-2011, 02:54 PM	#25
Homemade WRX Scooby Guru Member#: 33782 Join Date: Mar 2003 Chapter/Region: MAIC Location: 3MI Racing LLC Vehicle: 96 bastard child search FIRST, then PM!!!	you can see it a little in the first pics too. Just to clearance the cap.