Reedjet modifications.

[aracer50]

So after iam out of piston oversizes on the Reedjet, What is the next option to make it a larger cc engine. for open type class,s?

 

[sundog]

Buy a new cylinder or re-sleeve it.

 

[nobozos]

^^^^^^ very true might be slower with a big bore happens more often than not.Chuck.

 

[Killer Bee]

So after iam out of piston oversizes on the Reedjet, What is the next option to make it a larger cc engine. for open type class,s?

Make it a 116, unless your already there

 

[nobozos]

It takes more than a piston to make it a116 do the math, just saying Chuck.

 

[Killer Bee]

It takes more than a piston to make it a116 do the math, just saying Chuck.

yes , your right cant remember if its a longer rod or a different stoke , plus a spacer.

 

[tecbigdog]

A longer rod changing the engine size??????? Hmmmmm.

 

[nobozos]

Bob be nice, hope all are well down there keep a eye on Hoppy only one lol Chuck.

 

[sundog]

I made my suggestion because I thought he wanted to keep it legal for a 100cc class.

 

[alvin l nunley]

yes , your right cant remember if its a longer rod or a different stoke , plus a spacer.

A longer stroke will give you more cc's, but all a longer rod will do is make you piston higher ATDC and ABDC. But I'm sure you knew that?

 

[alvin l nunley]

A bigger piston equals less horsepower? Why is that? What about the time-honored saying "nothing beats cubic inches"? Other than the fact that a bigger piston is probably heavier, why would it be slower. I have a friend who has a Reed Open McCullough and his piston looks like Swiss cheese. A heavier piston can be compensated for with more counterweight on the crankshaft. My friend has tungsten counterweights (Horstman used to sell them) welded to the crankshaft.
Give me the bore and stroke and I'll tell you how much bigger the bore needs to be for 117 mL

 

[nobozos]

Al , I never mentioned hp just seems like a square motor can run as well and maybe better than one that's been hoged out. Chuck.

 

[rainman]

Al , I never mentioned hp just seems like a square motor can run as well and maybe better than one that's been hoged out. Chuck.

Depends on what you want it for. For an oval you might do better with a bigger displacement. Chuck, with a piston on the 54s you'll have a 116 out of amost 100 reeds without any further mods or changing the stroke. Of course you better feed it good with a bigger carb and so on. Now my experience on dirt ovals tells me my previous big bore on 57s piston with stock stroke was was very close to the displacement of my stroker 131 Sudam with 54s pistons but wasn't so good on ovals. For ovals I will take a stroker over any big bore.

 

[nobozos]

Rainman unfortunately you are wrong about the 54 piston do the math. Later Chuck.

 

[nobozos]

Rain,my mistake you are right on most reeds and rotary engines I had a brain cramp had Yamahas on the front burner lol Chuck.

 

[alvin l nunley]

So many things to consider, rod length/stroke ratio, heavier piston, port timing, all have to be considered.
Adding stroke will change the port timing. Also the rod stroke ratio.
In my time (the dark ages) Komet and Parelli (over square versus under square) were going head-to-head. I've run both with direct drive and can't really say which one was better. I know they both turned about the same peak RPM.

 

[nobozos]

10-4 Al.

 

[rainman]

Rain,my mistake you are right on most reeds and rotary engines I had a brain cramp had Yamahas on the front burner lol Chuck.

I know you always have to say I am wrong 1st, lol. Call you later this week, Chuck. We can measure that one if you want.

 

[Justin Greene]

Hey send it to David @ T S Racing he did one for me 116 Piston and spacer it ran real good for a 116/dual carb

 

[michael collins]

54.mm piston and a 50.mm stroke ends up at 114.5CCs total