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Forum: Offroad Nitro Engine Forum

07-04-2015, 09:35 AM

Replies: 2

Glow Plugs for Ofna Hyper .21

Views: 3,939

Posted By Anthoop

The engine (part #53211) uses a standard glow...

The engine (part #53211) uses a standard glow plug...the "Turbo" marking on the pullstart housing is a reference to the one way bearing holder.

The OS 8 plug will work fine in the above...

Forum: Offroad Nitro Engine Forum

07-04-2015, 09:23 AM

Replies: 6

Ofna hyper 21 8 port with boost

Views: 1,845

Posted By Anthoop

Anything associated with two strokes is old...

Anything associated with two strokes is old technology...basically Yamaha thought of most of the ideas...anything after was just straw clutching.
No doubt next years top RC engine will have...

Forum: Offroad Nitro Engine Forum

07-01-2015, 07:31 AM

Replies: 9

Choosing nitro engine for Hobao Hyper SS

Views: 9,043

Posted By Anthoop

The eight port has more rpm than the three...

The eight port has more rpm than the three port...and the eight port race engine uses a 14mm crank as opposed to the normal 13mm crank.

Forum: Offroad Nitro Engine Forum

07-01-2015, 07:17 AM

Replies: 6

Ofna hyper 21 8 port with boost

Views: 1,845

Posted By Anthoop

It can improve throttle response! The idea...

It can improve throttle response!

The idea used here is from something that Yamaha developed many years ago for motorbikes.

Basically when you open the throttle then airspeed through the carb...

Forum: Offroad Nitro Engine Forum

07-01-2015, 06:45 AM

Replies: 9

Choosing nitro engine for Hobao Hyper SS

Views: 9,043

Posted By Anthoop

I have no experience with the Force.28....but I...

I have no experience with the Force.28....but I have used many Macstar.28 and Hyper.21...they are essentially the same engine but with a different bore....same carb/crank/rod/bearings/head/gudgeon...

Forum: Onroad Nitro Engine Zone

11-20-2007, 06:18 AM

Replies: 56

ORION CRF .12.............BAD PISTON CASTING

Views: 5,139

Posted By Anthoop

How strange,two pages of flaming a guy stating he...

How strange,two pages of flaming a guy stating he had piston failure and no one even mentioned how a piston is made and the possible problems associated with cast aluminium!:confused:

Forum: Nitro On-Road

11-11-2007, 01:12 PM

Replies: 7

put some pics for this thred

Views: 1,136

Posted By Anthoop

I'll show you mine if you show me yours!!:lol:

I'll show you mine if you show me yours!!:lol:

Forum: Nitro On-Road

11-11-2007, 05:13 AM

Replies: 71

PB9 restoration.

Views: 24,411

Posted By Anthoop

Sounds like you struck gold with the guy in the...

Sounds like you struck gold with the guy in the State's.

Forum: Nitro On-Road

11-11-2007, 04:44 AM

Replies: 71

PB9 restoration.

Views: 24,411

Posted By Anthoop

Wow,awesome work so far.Very nice,looking forward...

Wow,awesome work so far.Very nice,looking forward to seeing the end product!:)
What are you doing about a body?

Forum: Nitro On-Road

11-10-2007, 03:16 AM

Replies: 16

Belt Drive vs shaft drive

Views: 5,749

Posted By Anthoop

Belt or shaft? Belts are used due to less...

Belt or shaft?
Belts are used due to less rotational mass,allowing better response and increased acceleration.However belts are sensitive to dirt so must either be totally sealed or only used in...

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