bulletproof monoblock

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Clouse2411

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Nov 27, 2007

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• Mar 27, 2008

• #1

Well I have a 93 XLT engine thats blown up and I want to build a bulletproof motor out of it. This is what I have in mind. Weld crank, SLP toughboy kit, drilled oil hole, .040 Wiseco pistons, SLP heads, PSI modblaster pipes, and 38mm carbs. Any ideas on jetting and suggestions?

 

Last edited: Mar 27, 2008

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andy_09

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Dec 6, 2007

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Great Falls Montana

• Mar 27, 2008

• #2

i have an xlt its bored .030 over with wiseco pistons,DG pipes, crank trued and welded, slp crankshaft balancer and 39.5mm carbs--it runs really well for a 600 and is very dependable and can rev really high

 

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Clouse2411

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• #3

1mm=.040 right?

 

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andy_09

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Dec 6, 2007

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Great Falls Montana

• Mar 27, 2008

• #4

sh!t mine is .020 over i forgot. the part number is SK1168 its either 607 or a 613cc i cant remember

 

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theultrarider

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Nov 26, 2007

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Soldotna Alaska

• Mar 28, 2008

• #5

If you want bulletproof, stay away from the wiesco's. Go with either polaris or spi pistons. The wiesco's are too much trouble.

 

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TravRMK

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• Mar 28, 2008

• #6

With pipes, that engine will not be bulletproof! I had a 96 and went through 3 cranks in one season! Once stock engine with pipes, and heads, once with pipes head, and welded crank, and finally once with a SLP 654 bigbore with the toughboy bearing. The cranks just don't like to spin that high of rpm's that you need to with pipes.

 

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snownman

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• Mar 28, 2008

• #7

bullet proof????

no engine will ever be bullet proof but you shouldnt waste your time on that engine, find a good used 700 twin and put it in it, a lot more torque,more hp. and always going to be WAY more reliable.

 

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Clouse2411

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• Mar 28, 2008

• #8

TravRMK said:

With pipes, that engine will not be bulletproof! I had a 96 and went through 3 cranks in one season! Once stock engine with pipes, and heads, once with pipes head, and welded crank, and finally once with a SLP 654 bigbore with the toughboy bearing. The cranks just don't like to spin that high of rpm's that you need to with pipes.

Click to expand...

Still got the 645 top end? Wanna sell it?

 

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andy_09

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Dec 6, 2007

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Great Falls Montana

• Mar 28, 2008

• #9

mine will run at 8100 all day with the jetting i have in it, never had any probs with pipes or anything

 

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Need4Speed

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Nov 30, 2007

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• Mar 28, 2008

• #10

andy_09 said:

mine will run at 8100 all day with the jetting i have in it, never had any probs with pipes or anything

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Yep. They WILL run 8100 all day long. Problem is with triple pipes you have to spin closer to 9000 to make top HP. That's where the problems come up. If you can put on the triple pipes and stay around 8500 you'll be better off. You'll lose some ponies but it will be more dependable.

 

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Clouse2411

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• Mar 28, 2008

• #11

TravRMK said:

With pipes, that engine will not be bulletproof! I had a 96 and went through 3 cranks in one season! Once stock engine with pipes, and heads, once with pipes head, and welded crank, and finally once with a SLP 654 bigbore with the toughboy bearing. The cranks just don't like to spin that high of rpm's that you need to with pipes.

Click to expand...

It all depends on how much your putting the motors though. I run at about 9 grand not holding it wide open all the time. I'll probly run this one to about 8,600 MAX.