Topic: RC Stroker Rods

[cavebear]

Did RC ever make a 4mm stroker rod? If so, did they also make the crank to go with it?

[754]

 They made them , I have a set of the rods, used ones..

[Greggo]

They made them , I have a set of thecrods.

Used, or new Frank?

[bear]

Did RC ever make a 4mm stroker rod? If so, did they also make the crank to go with it?

Stroker rod?
What's the go, are they shorter?

Cheers,
Brian

[cbr954]

RC Engineering listed the rods and crank in there catalog.  I know Ken at cycle x had a stroker crank and rod set, its still up on there used performance parts page.

[Greggo]

RC Engineering listed the rods and crank in there catalog.  I know Ken at cycle x had a stroker crank and rod set, its still up on there used performance parts page.

I couldn't find it...got a link?  Is it the 'Pawn Shop' section now?

[Bill/BentON Racing]

I think he sold them,Maybe removed from site? bill

[cbr954]

http://www.cyclexchange.net/Front%20Ends%20Page.htm     see if this works.

[Sam Green Racing]

Did RC ever make a 4mm stroker rod? If so, did they also make the crank to go with it?

Stroker rod?
What's the go, are they shorter?

Cheers,
Brian

Half the length that the crank has had the stroke increased by.

Sam.

[bear]

Did RC ever make a 4mm stroker rod? If so, did they also make the crank to go with it?

Stroker rod?
What's the go, are they shorter?

Cheers,
Brian

Half the length that the crank has had the stroke increased by.

Sam.

Hmm....
I'm gonna draw the crabs on myself again.
Reducing conrod length and increasing stroke ant a good idea.

Cheers,
Brian

[Sam Green Racing]

Why's that young Brian, If you use the same size rods, the piston will clatter the combustion chamber.
The only way round that is to fit a spacer under the block to give you clearance but then your valve timing will be out.
If you lengthen the stroke by moving the crank pin out by 4mm, the origional stroke will be lengthened by 8mm (the piston will rise by 4mm and fall by 4mm) so by fitting a 4mm shorter rod, your stroke is still increased by 8mm and your valve timing is not compromised.

Sam.

[MRieck]

Did RC ever make a 4mm stroker rod? If so, did they also make the crank to go with it?

Stroker rod?
What's the go, are they shorter?

Cheers,
Brian

Half the length that the crank has had the stroke increased by.

Sam.

Hmm....
I'm gonna draw the crabs on myself again.
Reducing conrod length and increasing stroke ant a good idea.
Cheers,
Brian

Basically I agree. Jay did point out that less dwell @ TDC allows for more agressive cam profiles. Unfortunately rod angle suffers.

[bear]

Valve timing isn't an issue Sammy.
Rod/stroke ratio may be though.
I've never been game to shorten it up more than 1.7-1
Even those numbers load the pistons I am using up more than I would like.

Cheers,
Brian

[bear]

Did RC ever make a 4mm stroker rod? If so, did they also make the crank to go with it?

Stroker rod?
What's the go, are they shorter?

Cheers,
Brian

Half the length that the crank has had the stroke increased by.

Sam.

Hmm....
I'm gonna draw the crabs on myself again.
Reducing conrod length and increasing stroke ant a good idea.
Cheers,
Brian

Basically I agree. Jay did point out that less dwell @ TDC allows for more agressive cam profiles. Unfortunately rod angle suffers.

The longer rods help maintain cylinder pressure as well, but best of all they allow me to run shorter piston skirts and I just love short skirts.

Cheers,
Brian

[NitroHunter]

2.0 or greater is common in the diesel industry, keeps the skirt wear down for high milage application.
There are some Pro Stock 500cid motor builders who believe that 1.9 is the magic number - but oh boy it takes tons of cubic hours and dollars to make those parts work. Some pretty tall deck heights too...
Their cam profiles make a .800" lift TF cam look wimpy. 

[dusterdude]

Why's that young Brian, If you use the same size rods, the piston will clatter the combustion chamber.
The only way round that is to fit a spacer under the block to give you clearance but then your valve timing will be out.
If you lengthen the stroke by moving the crank pin out by 4mm, the origional stroke will be lengthened by 8mm (the piston will rise by 4mm and fall by 4mm) so by fitting a 4mm shorter rod, your stroke is still increased by 8mm and your valve timing is not compromised.

Sam.

wow!!,sam,you're sounding like you got some book learnin

[MRieck]

Did RC ever make a 4mm stroker rod? If so, did they also make the crank to go with it?

Stroker rod?
What's the go, are they shorter?

Cheers,
Brian

Half the length that the crank has had the stroke increased by.

Sam.

Hmm....
I'm gonna draw the crabs on myself again.
Reducing conrod length and increasing stroke ant a good idea.
Cheers,
Brian

Basically I agree. Jay did point out that less dwell @ TDC allows for more agressive cam profiles. Unfortunately rod angle suffers.

The longer rods help maintain cylinder pressure as well, but best of all they allow me to run shorter piston skirts and I just love short skirts.

Cheers,
Brian

Smokey Yunick was a huge advocate of extended piston dwell....unfortunately time has mached on and some of Smokey's most sacred beliefs have been discounted and put aside. In light of that.......I do still believe for 90% of the strokers out there (Busa's, old KZ's, GS's) the longer rod with a spacer plate is the best way to go. Just my 2.
 I understand Jay's point completely but to me it is the same as offset bores....you can do it but it is application specific.

[bear]

2.0 or greater is common in the diesel industry, keeps the skirt wear down for high milage application.

Nitro,

I agree, piston failure or excessive wear is my major worry.
We have settled on 1.7 for our motors it seems to be pretty close to the mark.
The A motor uses VFR750RR pistons (very short skirts), while the B motor uses XR250R pistons that have a more conventional skirt length.

Cheers,
Brian

Sorry for high jack cousin cave.

[MRieck]

2.0 or greater is common in the diesel industry, keeps the skirt wear down for high milage application.

Nitro,

I agree, piston failure or excessive wear are my major worry.
We have settled on 1.7 for our motors it seems to be pretty close to the mark.
The A motor uses VFR750RR pistons (very short skirts), while the B motor uses XR250R pistons that have a more conventional skirt length.

Cheers,
Brian

Sorry for high jack cousin cave.

Good....I'm glad I didn't waste my time on this thread.

[bear]

 Smokey Yunick was a huge advocate of extended piston dwell....unfortunately time has mached on and some of Smokey's most sacred beliefs have been discounted and put aside. In light of that.......I do still believe for 90% of the strokers out there (Busa's, old KZ's, GS's) the longer rod with a spacer plate is the best way to go. Just my 2.
 I understand Jay's point completely but to me it is the same as offset bores....you can do it but it is application specific.
[/quote]

Yeh!............. What he said.

Cheers,
Brian

[754]

 I would gladly run the "wrong stuff". If it made me go faster.

 Should mention on Goldenrods, that probably have to do some case clearancing they are pretty stout.

[MRieck]

I would gladly run the "wrong stuff". If it made me go faster.

 Should mention on Goldenrods, that probably have to do some case clearancing they are pretty stout.

...and list it on 2 threads. Trying to get to 14,000 Frank? I've been on this board 2.5 years longer with less than half the responses.....and I have plenty to say.

[MRieck]

I would gladly run the "wrong stuff". If it made me go faster.

 Should mention on Goldenrods, that probably have to do some case clearancing as they are pretty stout.

Probably???

[Bill/BentON Racing]

OK,definitely!!!!! Bill

[bear]

I would gladly run the "wrong stuff". If it made me go faster.

 Should mention on Goldenrods, that probably have to do some case cleansing they are pretty stout.

With the discussions we've had lately ie; RC block's and some conrods, it's not about "the wrong stuff."
The gear we have been talking about is good gear, no doubt about that.
The argument that Mike and I are putting forward is more to do with whether the applications some of these parts are used in are appropriate.
( Sorry Mike I don't mean to preempt your opinion)

Cheers,
Brian

See Uncle Sammy, I can "keep it sensible"