stunthanger.com

Engine basics => Engine set up tips => Topic started by: old fart on March 04, 2006, 01:13:02 PM

Title: 40 MCCOY
Post by: old fart on March 04, 2006, 01:13:02 PM

  HAS ANYONE TRIED ,REPLACING A PISTON/CYL FROM A 40 FINNED CASE MCCOY TO A  RED HEAD   ENGIEN ANY PROFORMANCE CHANGE ,PORTING CHANGE? RUN CHARISTCIS IE 2/4BRAKE ECT? ??? ???

Title: Re: 40 MCCOY
Post by: Bill Little on March 04, 2006, 09:37:52 PM

Quote from: old fart on March 04, 2006, 01:13:02 PM

  HAS ANYONE TRIED ,REPLACING A PISTON/CYL FROM A 40 FINNED CASE MCCOY TO A  RED HEAD   ENGIEN ANY PROFORMANCE CHANGE ,PORTING CHANGE? RUN CHARISTCIS IE 2/4BRAKE ECT? ??? ???

HI Ron,

The Testor's Series 21 40 sleeve doesn't fit into the RH 40 case with out machine work.  I tried. :(  John Wright has done it and it will run great if you can do the machining work.

The 29, however, will interchange with no problem.  I use one on a Super Clown in OTS.  It actually runs better!  Out standing engine with an outstanding 4-2 break and a touch more power..  I used the "black" head reapinted red. :)

Haven't tried a .19 or .35, yet.

Title: Re: 40 MCCOY
Post by: Steve Fitton on March 06, 2006, 12:11:08 PM

The Series 21 is a Dykes ring engine, is it not?  Maybe not the ideal replacement for the (lapped) Redhead 40.


Steve

Title: Re: 40 MCCOY
Post by: Bill Little on March 08, 2006, 07:35:09 PM

Quote from: Steve Fitton on March 06, 2006, 12:11:08 PM

The Series 21 is a Dykes ring engine, is it not?  Maybe not the ideal replacement for the (lapped) Redhead 40.


Steve

Hi Steve,
Actually if you machine the case and put in the Series 21 Dykes ringed cylinder and piston, it works as good or better than the original!  John Wright does this to his sometimes.
The 29 in my Super Clown is a "mutant" Red Head.  Does a 4-2 better than ANY of the stock ones I've had and is a drop in replacement.

Title: Re: 40 MCCOY
Post by: Louis Rankin on March 08, 2006, 08:08:58 PM

Does the 35 require machining, or is it a drop in?

Title: Re: 40 MCCOY
Post by: Busby on March 09, 2006, 02:59:22 PM

Louis ,
The 35 is a drop in ,Back in the day ,we had several set up to run slow Rat.
They were sleepers ,really cranked well, good HP and speed up until the cranks broke.
This was right before we developed the reworked OS 40 for use as a slow Rat motor.
Busby

Title: Re: 40 MCCOY
Post by: Louis Rankin on March 09, 2006, 03:40:22 PM

Busby,

I have a Series 21 35, I may just have to locate a suitable Lightning Bolt case Red Head and give it a try.  Anybody out there have a Lightning Bolt Case Red Head 35 they want to get rid of cheap? 

Title: Re: 40 MCCOY
Post by: Garf on March 11, 2006, 09:49:58 PM

Why would it need to be the lightning bolt model?

Title: Re: 40 MCCOY
Post by: Louis Rankin on March 11, 2006, 10:35:10 PM

Lightning Bolt cased Red Heads had the reputation of having better QA and tolerance.  The case is a little stronger also.

Title: Re: 40 MCCOY
Post by: Bill Little on March 30, 2006, 07:03:31 AM

Hi Louis,
With the piston/cyl. swap, a good condition chrome case will probably be just fine.  The issues with McCoys always seemed to be the piston materials and fit. 
It's a shame that the 40 isn't a drop in swap!  They are my favorite (along with the Veco 35) for "Classic" stunt engines.  More power than the Fox 35, but as easy to 4-2.  They just have their own "sound".  ;D

Title: Re: 40 MCCOY
Post by: Louis Rankin on March 30, 2006, 07:33:29 AM

Yes, that is true; however, those Lightning Bolts look so cool.

Title: Re: 40 MCCOY
Post by: Bill Little on March 30, 2006, 08:07:54 PM

Quote from: Louis Rankin on March 30, 2006, 07:33:29 AM

Yes, that is true; however, those Lightning Bolts look so cool.

LBs win the "coolness factor" hands down!  ;D