Can you run a stroker crank in stock motor?

[01bansheefox]

Might be stupid question, just wondering.

[fixitrod]

Might be stupid question, just wondering.

294172[/snapback]

 

I will probably run worse than with a stock crank if you don't have the porting matched at least. You don't need a full port job, but have someone match the timing to at least stock.

[01bansheefox]

The motor has a trail/drag port with adv timing. I was wondering if it fits in the motor. You dont need bigger cylinders or anything what stops it from hitting the spark plugs, because stroker crank= longer right?

 

Would a stroker crank wok better or should I just leave the stock one alone.

[Redlined]

Yes, you can put a stroker crank in your stock cylinders, along with a spacer plate which will raise your

[Wallrat]

The understanding that I had was that if you had your cyls ported before getting it stroked then the ports aren't going to match up. This may or may not be correctable by getting it reported, depending on how much was removed from the first porting. A spacer plate fits in where the cyls attach to the case thereby raising the cyls up to compensate. The preferable method of dealing with the extra stroke is to either run a different head made for strokers or to have your stock head domes milled to accomodate the added stroke. I don't really understand the physics involved but spacer plates screw with crankcase volume and aren't a very good way to go. If you added a stroker crank without having the engine ported you'd feel some gains, but it wouldn't be much. I was told that a stock engine running a +4 stroker would have about as much power as a stock engine with a mild port job. That's basically all I've learned so far as I'm researching the same topic. Although in my case I have no porting but am planning on getting it ported in June.

[01bansheefox]

Hmm i guess i will just stick with the stock crank for now..... No use reporting it when its already done.

[Redlined]

Wallrat,

 

You are right about reporting your cylinders to accommodate a stoker crank. Depending on the amount of porting on your cylinders, you may need to get some new ones so they can be ported to match the stroker.

 

01bansheefox,

 

If you are looking for some more power, I would suggest getting your stock cylinders ported and skip the stroker for now. You will be pleased with the power gain and it won

[01bansheefox]

As i said above the cylinders already have trail/drag port along with a milled head. and weisco pistons.

[Redlined]

As i said above the cylinders already have trail/drag port along with a milled head. and weisco pistons.

294322[/snapback]

 

Your right, you did say that.

 

I guess you need to talk to your builder and see if you will be able to put a stroker crank in those cylinders, or if you need new ones.

[01bansheefox]

Well i didnt have the work done, the engine was already like this when i got it.

[Wallrat]

Take your cyls into whoever you would like to do the porting. Any good builder could tell you if they'll work or not.

[bansheelover]

hey guys, correct me if im wrong but if it was ported for a stock crank they why cant u just add a spacer plate to the ported cylinders , then it will match up to the stroked crank

 

wouldnt that work, unless u didnt want to run a spacer, but thats up to the rider

 

Matt

[Redlined]

hey guys, correct me if im wrong but if it was ported for a stock crank they why cant u just add a spacer plate to the ported cylinders , then it will match up to the stroked crank

Edited December 19, 2004 by Redlined

[bansheelover]

good point................

[01bansheeke]

do you have a trail port on one cylinder and a drag port on the other?