Here is their full circle 90mm version.
Never have bought the knife-edge option.
Full circle is a must.
Not enough rod and main journal overlap to run one not full circled.
Crank flex would be a big issue if you don't IMHO.
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| Author: | Roy [ Tue Feb 12, 2008 6:50 pm ] |
| Post subject: | DPR Crankshafts |
I am looking at buying a DPR 90mm crankshaft for a 2500 I am building. Have never built a 2500 before. On their website they offer full circle or knife edge. What are the pros AND cons of these two options? Anyone using their products? I know Bruce1 has one but anyone else? Thanks |
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| Author: | turboblue [ Tue Feb 12, 2008 6:55 pm ] |
| Post subject: | |
Here is their full circle 90mm version. Never have bought the knife-edge option.
Full circle is a must. Not enough rod and main journal overlap to run one not full circled. Crank flex would be a big issue if you don't IMHO. |
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| Author: | sharpshooter [ Tue Feb 12, 2008 7:09 pm ] |
| Post subject: | |
Most of the motors in ky. have the dpr in them,that Iam told, and they have good luck with them |
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| Author: | dunebuggy79 [ Tue Feb 12, 2008 7:11 pm ] |
| Post subject: | |
Wildwillie is using one just like that for his motor.Hey roy what case will you be using?Does dpr have a website? aaron |
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| Author: | Roy [ Tue Feb 12, 2008 9:53 pm ] |
| Post subject: | |
I am going to try to squeeze it into a Mag. case. I already have the case clearance and the top of it is epoxied where the machine work came through. |
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| Author: | Buckmaster [ Tue Feb 12, 2008 10:03 pm ] |
| Post subject: | |
I've seen Tim at Southern buggy's put 1 in a stock case,used at that.I dont think it came through either.You might give him a ring and see how he done it.Let us know how it goes,cause i'm planning on building 1 myself. |
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| Author: | bruce 1 [ Tue Feb 12, 2008 11:08 pm ] |
| Post subject: | |
[quote='sharpshooter']Most of the motors in ky. have the dpr in them,that Iam told, and they have good luck with them[/quote] Most ?? All but 1 that I know of uses these cranks. Also what turbo blue said; The full circle is the only way to go unless you are drag racing. (making it lighter) The case Most AS41 cases will eat through the roof when you clearance them. I sold you the case and showed you that before you bought it. I was going to use that case but I got a CB c |
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| Author: | wildwillie [ Wed Feb 13, 2008 12:34 am ] |
| Post subject: | |
i just put my bottom end to gether but i used a super case we had to do no clearanceing on the case but on a stock case iv seen guys take j/b weld to the top of the case1/4" thick and clearance till thay almost hit j/b weld and buy the way tim stocks 90mm at a good price. |
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| Author: | Baddvw [ Wed Feb 13, 2008 12:56 am ] |
| Post subject: | |
I heard that some people said to stay away from the full circle cranks, I dunno, I run a forged 4340 chromoly crank and love it! |
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| Author: | Roy [ Wed Feb 13, 2008 6:59 am ] |
| Post subject: | |
Thanks for the info guys. |
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| Author: | turboblue [ Wed Feb 13, 2008 11:01 am ] |
| Post subject: | |
[quote='Baddvw']I heard that some people said to stay away from the full circle cranks, I dunno, I run a forged 4340 chromoly crank and love it![/quote] Smaller strokes really don't need full circled but at 90mm it is a must IMHO. They are heavy at about 20#. |
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| Author: | Strong [ Wed Feb 13, 2008 8:00 pm ] |
| Post subject: | |
Roy my 90 mm is full circle. Also i use 96.7 mm pistons in a 94 mm mag case to make 2643 cc. Bigger is always better. |
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| Author: | Buckmaster [ Wed Feb 13, 2008 8:12 pm ] |
| Post subject: | |
Hey Strong,how much do the 96.7mm pistons go for and did you mean that you put them in a 94mm jug or ????I'm like you,more the marry. |
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| Author: | dunebuggy79 [ Wed Feb 13, 2008 9:08 pm ] |
| Post subject: | |
[quote='Buckmaster']Hey Strong,how much do the 96.7mm pistons go for and did you mean that you put them in a 94mm jug or ????I'm like you,more the marry.[/quote] I think you would have to machine the cylinders down to fit in a 94 hole like they do with the 88mm slipins. aaron |
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| Author: | wildwillie [ Thu Feb 14, 2008 2:21 pm ] |
| Post subject: | |
HA ROY A 2500/FI.KNOW THAT WOULD BE BAD A$$. |
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| Author: | Strong [ Thu Feb 14, 2008 10:07 pm ] |
| Post subject: | |
Buck the pistons and cylinders are expensive. The pistons are forged venolias. The cylinders are drag motor style ( no cooling fins ). Aron is correct they are slipins like 88s. |
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| Author: | turboblue [ Fri Feb 15, 2008 11:22 am ] |
| Post subject: | |
[quote='Strong']Buck the pistons and cylinders are expensive. The pistons are forged venolias. The cylinders are drag motor style ( no cooling fins ). Aron is correct they are slipins like 88s.[/quote] The cylinders are probably made by LA Sleeve. So how does that work out for you in a woods car? |
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| Author: | kybuggy1 [ Fri Feb 15, 2008 12:24 pm ] |
| Post subject: | |
Strong, how long you ran the 96.7's? I've been told those 96.7's wear cylinders out after about 2 seasons of riding, unless you use nikasil cylinders, (which are about $2000 on the website where I saw them). Just wondering if you had the same problem? I want to run them, too, but dont wanna have to go thru top end and pay that much every two years or so. (I thought they were 96.5, anyways?) Thanks, Larry |
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| Author: | Roy [ Fri Feb 15, 2008 6:30 pm ] |
| Post subject: | |
[quote='wildwillie']HA ROY A 2500/FI.KNOW THAT WOULD BE BAD A$$.[/quote] That's my plan. Should run sweet. Torque on demand. 
The 2276 will go into my Baja Bug. I will be building that starting next winter. |
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| Author: | wildwillie [ Fri Feb 15, 2008 8:32 pm ] |
| Post subject: | |
iv thought about runnin my2500 off propain. |
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| Author: | Eric DeBord [ Sat Feb 16, 2008 10:53 pm ] |
| Post subject: | |
[quote='turboblue'][quote='Baddvw']I heard that some people said to stay away from the full circle cranks, I dunno, I run a forged 4340 chromoly crank and love it![/quote] Smaller strokes really don't need full circled but at 90mm it is a must IMHO. They are heavy at about 20#.[/quote] That is what I was wondering about..the weight. I am sure the power difference more than makes up for it, but how about longevity? |
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| Author: | bruce 1 [ Mon Feb 18, 2008 8:34 am ] |
| Post subject: | |
[quote='Eric DeBord'][quote='turboblue'][quote='Baddvw']I heard that some people said to stay away from the full circle cranks, I dunno, I run a forged 4340 chromoly crank and love it![/quote] Smaller strokes really don't need full circled but at 90mm it is a must IMHO. They are heavy at about 20#.[/quote] That is what I was wondering about..the weight. I am sure the power difference more than makes up for it, but how about longevity?[/quote: |
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