Author Topic: Powerbuilt or I/C (Read 17868 times)

mightymowe · « **on:** June 11, 2006, 10:00:22 am »

Is there a difference between the powerbuilt 12hp engine and the 12hp I/C engine? I was wondering because people tell me that I should look for the I/C engine to build into a race motor.

mowdak1 · « **Reply #1 on:** June 11, 2006, 03:37:19 pm »

The I/C or Industrial/Commercial engine has a cast sleeved bore, therefore it stands up much better.

mightymowe · « **Reply #2 on:** June 11, 2006, 05:35:49 pm »

the powerbuilt engine that I have says on the tag that it has a cast iron bore,and when I looked inside it does have a steel or iron bore sleeve in it that was why I was wondering if there were any other differences like maybe a steel crank or a heaver rod or more cooling fins or something that makes the I/C engine a better engine.

tory · « **Reply #3 on:** June 11, 2006, 08:25:47 pm »

I have a few examples of both and am not aware of any differances.

mowdak1 · « **Reply #4 on:** June 11, 2006, 08:31:26 pm »

I guess two questions come to mind in that case...

1.) Are you sure the sleeve is cast? And/or...
2.) Are you sure that it has the stock sheet metal on it?

http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200305355_200305355

If you check the link there on the Power Built you'll note in the specs that it states Aluminum Alloy Bore. As do these...

http://www.bizrate.com/oid71472932.html
http://www.tulsaenginewarehouse.com/catalog/briggs/bsvert/218700.html

If you go to an I/C listing however, you'll note that it states Cast Iron Cylinder Sleeve on that one.

http://www.tewinc.com/pdf/280H00.pdf

If it is a cast sleeve, I'd guess that either it isn't the stock sheet metal, or maybe Briggs was short Powerbuilts to meet an order that day and pasted Powerbuilt decals on an IC block. Hard saying, but that is the difference in the two and that's why folks tell you to look for IC when hunting motors to build.

I'm not sure, but I know Briggs make a piston with Teflon coated skirts, and I believe those are designed for the Powerbuilt. They work well in the IC as well, but their intent in design is to prevent the aluminum skirt from dragging on the aluminum cylinder walls. Another of the subtle differences.

matt25001149 · « **Reply #5 on:** June 11, 2006, 10:11:38 pm »

ok well heres a ? 4 u if i was gonna bore the snot outta it an make it a 31 would it be easier the use a powerbuilt (so u dont have to bore out the sleeve) or the i/c because u can jus pull out the sleeve and bore a lil to fit new one. kno what im sayin??

mowdak1 · « **Reply #6 on:** June 11, 2006, 10:33:57 pm »

In reading back over mightymowe's post I see his power built states cast iron sleeve on the label, so... I guess some are speced that way from Briggs. Hmmmmmmm! I would imagine that is an OEM specification in which case you do essentially have an IC block with Powerbuilt sheet metal and label. Not sure what else they may change in there.

On the matter of boring versus pulling sleeves and boring... that would be a good question for George! :wink:

mightymowe · « **Reply #7 on:** June 11, 2006, 10:55:36 pm »

I guess I was wrong the tag that says cast iron sleave was on the air cleaner could be a Canadian thing because were special.

mowdak1 · « **Reply #8 on:** June 12, 2006, 12:26:31 am »

LMAO! Could be changed sheet metal too! :wink:

It's hard saying mowe, had a rather serious debate going on earlier this spring over a 44 CID Intek. Never been rated a 20hp before, but this year there are several models that offer them. John Deere was first to request it, and Briggs did it for them. Not much surprises me there really, I think they have all of 6 blocks Large, Medium, and Small in Vertical and Horizontal and whatever anyone orders that's what they stick in them. It's sorta like going to Pizza Hut! If you know what I mean!! :wink:

mightymowe · « **Reply #9 on:** June 12, 2006, 08:58:26 am »

the way you see it is the way that I took it off my neighbors MTD lawn tractor.It was making a noise and leaking oil.I found out that the syncro balancer was wrecked and it was knocking and it pounded the case halves loose and that was why it was leaking oil. when I was in there I noticed that there is a liner in the bore and it has a cast crank and the connecting rod is not finished as nice as the rod in my honda(ie:cast as opposed to forged rod in the honda). That was why I was wondering about the cast crank,does the I/C have a steel crank?

George Herrin · « **Reply #10 on:** June 12, 2006, 10:07:15 am »

All the cranks are cast regardless of i/c or not. Briggs goes cheap!!!! Also you cannot compare the briggs finish to a honda finish, two different worlds there, as to which is better to bore, you do not remove the original steel sleeve to bore and re-sleeve. You simply bor it out till is gone and the size needed to press fit the new in. As to which is better, All a personal prefferance, most machinist I deal with prefer the aluminum bores over the steel. Cuts easier.

mightymowe · « **Reply #11 on:** June 13, 2006, 11:30:52 pm »

If I replace the syncro balance( with the add on weights from ARC) and the connecting rod what RPM is that cast crank good for? 6000? 7000?

George Herrin · « **Reply #12 on:** June 14, 2006, 07:27:01 am »

i have spun em 7500 no problem

jamie_guy3 · « **Reply #13 on:** June 15, 2006, 08:45:38 pm »

ALUMINUM block do you need a sleeve to make a 31

George Herrin · « **Reply #14 on:** June 15, 2006, 10:01:43 pm »

No it will bore out that big but it last longer with a steel sleeve

News:

Author Topic: Powerbuilt or I/C (Read 17868 times)