Log in
Search
Latest topics
» Here we go again... another Lawn-Boyby roddie Today at 9:36 pm
» My Cox .049 Marine inboard engine
by F4D Phantom II Today at 9:33 pm
» **VOTE-ON-THE-NEXT-COX-ENGINE-OF-THE-MONTH** (May 2024)
by Kim Today at 8:53 pm
» Help Pee Wee tank cap .020
by MauricioB Today at 8:45 pm
» Revivng Some Childhood Classics
by GTO455 Today at 8:11 am
» Jim Walkers FireBee - This is going to be fun
by rsv1cox Today at 7:29 am
» Post your Older books
by rsv1cox Yesterday at 7:51 pm
» EXTREMELY RARE COX THIMBLE DROME PROTOTYPE "BLACK WIDOW" GAS MODEL AIRPLANE
by rsv1cox Yesterday at 6:58 pm
» I brake for Turtles....
by rsv1cox Yesterday at 6:38 pm
» Ball - Socket Joints
by Ken Cook Yesterday at 3:06 pm
» A little nostalgia…
by MauricioB Yesterday at 2:32 pm
» A new useful transport vehicle
by davidll1984 Yesterday at 10:32 am
Cox Engine of The Month
Testors Turbo Plug adaptors
Page 1 of 1
Testors Turbo Plug adaptors
Hip - Hip - Hurray! The Kamtechnik Turbo plug adapter for the Wen-Mac / AMF/ Testors 049 is a Beta test! Greg sent me one to play with a while back from this post:
https://www.coxengineforum.com/t14505-merlin-inserts#188896
Today I had the chance to do a trial run comparing the original Testors glow head Vs the Kamtechnik turbo adapter. I got one of the three engines I selected for the test to start and run. Ran a small amount of fuel thru it just to warm it up and blow out the cobwebs and dust. The second tank I got readings of 11,700 to 12,600 RPM on the hand held tachometer. I then switched heads to the turbo plug adapter and restarted the engine. Tweaking the NV to smooth out the run and grab the tach I got readings of up to 13,200 RPM a very nice increase!
Standard Testors 4810 glow head:
Turbo plug head:
Test stand:
View of inside the heads:
Side view of each Style of head:
I didn’t record the temperature or humidity or and other scientific type stuff but it was a really nice fall day with unusually warm temperatures in the 70’s.. more test runs to be done in the near future.
https://www.coxengineforum.com/t14505-merlin-inserts#188896
Today I had the chance to do a trial run comparing the original Testors glow head Vs the Kamtechnik turbo adapter. I got one of the three engines I selected for the test to start and run. Ran a small amount of fuel thru it just to warm it up and blow out the cobwebs and dust. The second tank I got readings of 11,700 to 12,600 RPM on the hand held tachometer. I then switched heads to the turbo plug adapter and restarted the engine. Tweaking the NV to smooth out the run and grab the tach I got readings of up to 13,200 RPM a very nice increase!
Standard Testors 4810 glow head:
Turbo plug head:
Test stand:
View of inside the heads:
Side view of each Style of head:
I didn’t record the temperature or humidity or and other scientific type stuff but it was a really nice fall day with unusually warm temperatures in the 70’s.. more test runs to be done in the near future.
Marleysky- Top Poster
-
Posts : 3618
Join date : 2014-09-28
Age : 71
Location : Grand Rapids, MI
Re: Testors Turbo Plug adaptors
Cool , a new way to get old stuff going !! That's a nice increase too .
getback- Top Poster
-
Posts : 10138
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Testors Turbo Plug adaptors
What prop is that?
1/2A Nut- Top Poster
- Posts : 3434
Join date : 2013-10-20
Age : 60
Location : Brad in Texas
Re: Testors Turbo Plug adaptors
That looks pretty good. This was designed without any increase in performance in mind. I was going to supply a gasket, but after making the prototype I realized these engines never used gaskets and wouldn't even work with a gasket. So the prototype has a few points more compression than stock.
My main concern is that discussion about these engine indicates they can't handle much in terms of upgrades before grenading. That 600RPM may not seem like much but it's a 15% increase in power.
My main concern is that discussion about these engine indicates they can't handle much in terms of upgrades before grenading. That 600RPM may not seem like much but it's a 15% increase in power.
gkamysz- Gold Member
- Posts : 378
Join date : 2018-02-22
Location : Chicagoland
Marleysky- Top Poster
-
Posts : 3618
Join date : 2014-09-28
Age : 71
Location : Grand Rapids, MI
Re: Testors Turbo Plug adaptors
I guess I’d never say never about not using a gasket! The 7810 replacement glowhead (NIP) has a gasket. One of the Testors engines I have did have a glowhead with a gasket. It might be from using a replacement glow head. Although the glowhead with gasket looks the same as the bottom of Greg’s Adapter if you look at the side view of them.
Marleysky- Top Poster
-
Posts : 3618
Join date : 2014-09-28
Age : 71
Location : Grand Rapids, MI
Re: Testors Turbo Plug adaptors
I'd also read about gaskets in a thread here I think, but it's not something mentioned often. If you look at the gasketless head, it has a feature which is essentially a crush washer. The seating face in the cylinder isn't flat so I don't think a thin copper gasket like Cox would work. I don't know if all versions have cylinders like this. The particular engine I have is marked McCoy NO.1. Peter Chinn's 1970 review of the McCoy .049 said there was no gasket.
gkamysz- Gold Member
- Posts : 378
Join date : 2018-02-22
Location : Chicagoland
Re: Testors Turbo Plug adaptors
With the knife edge look of the mating surface of Greg's head i wouldn't think it would need a gasket .
getback- Top Poster
-
Posts : 10138
Join date : 2013-01-18
Age : 66
Location : julian , NC
Similar topics
» Turbo plug heads
» Preferred turbo plug for Kamtechnik head
» Glow Plug Norvel .074 / Turbo Head Norvel .074
» cox turbo arrow 3
» Turbo plugs
» Preferred turbo plug for Kamtechnik head
» Glow Plug Norvel .074 / Turbo Head Norvel .074
» cox turbo arrow 3
» Turbo plugs
Page 1 of 1
Permissions in this forum:
You cannot reply to topics in this forum