ANOTHER 4MM STROKER QUESTION

[glamisrat]

I AM REBUILDING A 87 BANSHEE. THE BIKE IS STOCK PORTING AND STOCK BORE.I WAS THINKING OF A 4MM STROKER.I SPOKE WITH ERIC GORE ABOUT DOING THE PORTING FOR THIS SET-UP AND HE SAID THAT HE USES A SPACER AND DOES NOT MODIFY THE HEAD.IS THERE ANY ADVANTAGE OR DISADVANTAGE TO THIS SYESTEM?

[fixitrod]

Builder preference.

 

Nice thing about the spacer plate, you can use anybodys head and domes. Some builders actually use the spacer plate to add more transfer volume... much needed on the banshee.

 

Down side, one more gasket that can fail.

 

That's all I've got to say about thaaaiit... in a forest gump voice.

[rebelbanshee2]

6 of one half a dozen of another...spacer plate-more leak points cut head-more heat in head

[banshee tuner]

Unless everything in your porting is just right to make up for it the spacer plate will lean most of your power towards top or bottom end depending on where you put the spacer.

[fixitrod]

Unless everything in your porting is just right to make up for it the spacer plate will lean most of your power towards top or bottom end depending on where you put the spacer.

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But Eric Gorr will port to prevent that.

[locogato11283]

first off i think you made the right choice by going with gorr. he does excellent work for a very reasonable price. what kind of porting are you getting? woods port? personally i dont like the spacer plates because everyone can sit there and look at your bike and see what you have. i prefer the domes being cut so its a little more stealthy. if you dont care either way then just go for the spacer plate, use a high temp silicon gasket shit and youll be fine. thats how passion does his and i dont think anyone has had any problems with theirs yet.

[glamisrat]

I RIDE MOSTLY SAND, SO I WAS GOING WITH A DUNE PORT.

I WAS GOING WITH ERIC GORR FROM ALL THE POSITIVE FEED BACK ON THE HQ

 

 

GOT SAND?

[Leadfoot350]

If you ride in glamis I would go with rudy kurtz at port majic. He wants around 400 for a all out port and he has been making some of the fastest bikes at glamis for over 20 years. He is very cool to talk to also. I have heard nothing but bad things about using the spacer plate. Get your domes cut by rd-tek guy. He knows domes a lot.

[PassionRE]

I AM

Edited January 28, 2005 by PassionRE

[jinx44]

Only the absolute highest performace drag motors with high BMEP ratings need to use the stock gasket and modded domes....Jim

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Yep, that is why my A&S all out drag motor uses recessed domes, but my 4mm's that need midrange use plates. If you compare a plate engine vs recessed you can see 800-1000rpms difference where the power comes on. I think Loco's engine is recessed. If we set up a date to dyno together and we are on the same dyno, we can do a comparison. I think we are about the same HP wise. I turned 76 on Mr. HP's stingy dyno.

 

I would still recommend Jim for a +4mm motor. I have 2 of his engines. There are WAY more happy Passion customers on here than Gore. I am not saying there are unhappy Gore customers but if there were as many Gore engines on here there would be one or two complainers. Its that way with any shop. I have owned and seen a few different cylinders Jim has done. They have all performed with or above big name shops.

[limitied03]

sorry to but into this post but upon my next rebuild im thinking of going with a stroker, my question is what all do i need to convert mine to a stroker besides a stroker crank...i need a list of everything involved including porting and who is the best for all the parts involved

[Wallrat]

You should go with a longrod crank (less stress on the engine) so you'll need some 795 series pistons ($80). Need the crank(bout $425). Head cut ($100) or spacer plate (I think $40 or so). Porting ($200 - $600). Better clutch ($80). Carbs and intake ($200 used up to $500 new). Gaskets, yamabond and oil seal kits ($60). Reeds if you don't have em ($220). That's about it.