motors

[Dan Hodges]

Re: 1500

Originally posted by chevy45412001
hey Dan if you read the whole post the guy made his own custom jugs to come up with the 1500.

Making a set of so called jug's is not a problem as a company called Darton can and or will make any size sleeve configeration you need.You can also get an after market siamese block that is designed for early eighties Kawasaki and Susuki motor's in an machined state and machine it into what ever configeration you so desire.The bore size is limited by the center to center distance of the cylinder's,the location of the head bolt's and the crank case itself.To get 1500cc's you need an 80mm bore even if you stroke it to 75 mm and an 80 mm bore is 8.5 mm larger than stock.The stock jugs are .140 thick and consquently an 8.5mm over bore is .167 thousand's more per side not counting the minimal cylinder wall thickness of .060 or the .040 the guy with the 1500 claimed.The bottom line,an 8.5 mm bore will bring the bore's out to the cylinder head stud hole's.You can take a block and check it for yourself.Darton,the company I named above makes sleeve's for Chevrolet,Brodix,Dart Machinery, Arias,Milodon and Donovan for their aluminum block's,not to mention all kind's of motorcycle's so getting sleeve's made is the least of the problem's for this deal.Oh yes,getting the rod's to clear the crank case in an Eleven with a 75 mm stroke and the piston skirt's to clear the counter weight's of the crank is no easy feat unto itself.Again,get yourself a block and a crank case and do some measureing and you will see what I mean.

[Dan Hodges]

Re: Re: 1500

Originally posted by Dan Hodges
Making a set of so called jug's is not a problem as a company called Darton can and or will make any size sleeve configeration you need.You can also get an after market siamese block that is designed for early eighties Kawasaki and Susuki motor's in an unmachined/raw state and machine it into what ever configeration you so desire.The bore size is limited by the center to center distance of the cylinder's,the location of the head bolt's and the crank case itself.To get 1500cc's you need an 80mm bore even if you stroke it to 75 mm and an 80 mm bore is 8.5 mm larger than stock.The stock jugs are .140 thick and consquently an 8.5mm over bore is .167 thousand's more per side not counting the minimal cylinder wall thickness of .060 or the .040 the guy with the 1500 claimed.The bottom line,an 8.5 mm bore will bring the bore's out to the cylinder head stud hole's.You can take a block and check it for yourself.Darton,the company I named above makes sleeve's for Chevrolet,Brodix,Dart Machinery, Arias,Milodon and Donovan for their aluminum block's,not to mention all kind's of motorcycle's so getting sleeve's made is the least of the problem's for this deal.Oh yes,getting the rod's to clear the crank case in an Eleven with a 75 mm stroke and the piston skirt's to clear the counter weight's of the crank is no easy feat unto itself.Again,get yourself a block and a crank case and do some measureing and you will see what I mean.

Since I posted this I have did some thinking and one could machine a block from a raw piece of T6 or T5 aluminum and use Darton sleeve's but you would not have room for the o ring seal's on the bottom of the sleeve's nor would there be any air between the cylinder's.The upper crank case would need some serious grinding and welding to accomodate the 3.25 od sleeve's you would be using.This configeration is based on the stroker crank,if you used the stock stroke an 83mm bore would fetch you 1485 cc's.Personally, I don't see how you could get a bore this big to work with the head bolt spacing and the upper crank case configeration and even if you could it would run way too hot for the street and would not be competitive at the drag race's.To say the machine work involved in this would be time consuming and hence mucho expensive is an understatement.The air cooled two valve 4 cylinder Susuki's and Kawasaki's are the engine's of choice in NHRA Pro/Stock motorcycle drag racing and they use an 85-86 mm bore made from a billet block,but it has much larger bore center's than the XS Eleven.Personally though,I would never say anything is impossible.

[pggg]

From what I can see, 76mm is the absolute maximum bore size you could get from a stock XS11 block. The sleeves are 7.5mm thick and only 1mm apart at the combustion chamber, and taper to only 3mm thick at the bottom, and that's with the stock 71.5mm bore. A looong stroke 1500cc XS would be like a big ole plodding Harley and I'm guessing it'd struggle to hit 6000 revs before self destructing

[Dan Hodges]

Originally posted by pggg
From what I can see, 76mm is the absolute maximum bore size you could get from a stock XS11 block. The sleeves are 7.5mm thick and only 1mm apart at the combustion chamber, and taper to only 3mm thick at the bottom, and that's with the stock 71.5mm bore. A looong stroke 1500cc XS would be like a big ole plodding Harley and I'm guessing it'd struggle to hit 6000 revs before self destructing

The top of the sleeve's have a lip on them as all sleeves do,but I'm not sure if the top of the sleeve is thicker than the bottom or not.I am going to take one of my spare block's and remove one of the sleeves and find out just how much material there is in the block itself.I have measured the distance between the bottom of the sleeve's,the bore center's and the distance between the sleeve's and the head bolt's and I agree with you,76mm-77.5mm is as big as you can go without offset boring the block and moving the head bolt's around.If this were a siamese block you might go a little bigger,but with this block you would hit daylight with a bore like they were talking about.Even if you could get a bore that big,(80-85mm) the head's are too small too support that many cubic inches and it would run like a tractor motor.There are much easier way's of obtaining V-Max power than this and it's called N2/O,good ole laughing gas,only you won't be laughing when the Nitrus comes on as the skinny little 130-16 back tire will be lit up like a Christmas tree and you will be enveloped in the smoke of burning Dunlop's.They say smoking is bad for your health,but I don't think they were talking about smoking the competition.

[Glarusguy]

picture

My engine seems to be missing that one piece next to the motor. Where do I find the cresent wrench part???

(sorry it's late and cold/flu season...too much Nyquil)

[chevy45412001]

actually

actualy i miss wrote on that post. the guy bought the bike NEW and has went threw MANY engines and configurations since to come up with the claimed 1500 , Just remember my xj is called an 1100 but actualy is an 1102 , so even if he only had 1451 i'd say kudo's to him and let the 1500 slide, plus the turbo , plus the airshifter plus the chain drive conversion,nough said....That bike is way BAD!!!!! no matter if it is impossible to get 1500cc or not , oh ya and Have a nice day.