90" cast iron Sportster kit
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Tourer
Joined: Jul 2009
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90" cast iron Sportster kit
Showed up the other day for my next project later this winter, only thing left is to have the cases bored out now.
It's the NRHS 90" cast iron kit and I had them notched the pistons and gap the rings and installed the pistons too. Right now I'm running their 1250 kit and running low 12's in the 1/4 and since I don't want to give up my beer and pizza and loose a few pounds from 250 suited up. This should do the trick, like running solidly in the 11's and over 114 mph to give all those Firebird's and Camaro's a good run
Here's a few pic's
Reverse dome pistons, I think around negative 10-12cc for 10-1 compression with my stage II 64cc heads.
Nothing like a 3 and 7/8" bore for alittle more torque
Cases will need to bore out to drop these puppies in
Here's the oem 1200 piston and the 90" one
Here's the 1200 piston in the 90" cylinder about 1/4" clearance all the way around.
It's the NRHS 90" cast iron kit and I had them notched the pistons and gap the rings and installed the pistons too. Right now I'm running their 1250 kit and running low 12's in the 1/4 and since I don't want to give up my beer and pizza and loose a few pounds from 250 suited up. This should do the trick, like running solidly in the 11's and over 114 mph to give all those Firebird's and Camaro's a good run
Here's a few pic's
Reverse dome pistons, I think around negative 10-12cc for 10-1 compression with my stage II 64cc heads.
Nothing like a 3 and 7/8" bore for alittle more torque
Cases will need to bore out to drop these puppies in
Here's the oem 1200 piston and the 90" one
Here's the 1200 piston in the 90" cylinder about 1/4" clearance all the way around.
Last edited by RacingJake; Nov 3, 2010 at 10:51 AM.
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Joined: Oct 2010
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From: Montana
Thread Starter
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Tourer
Joined: Jul 2009
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What I like best is to race my bike that's in avatar in the Quick 16 against the Rails and that's tough to win but fun anyhow.
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