Who Makes Diesel Conversion Kits ?? besides Davis Diesel
04-07-2005, 03:18 AM
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Who Makes Diesel Conversion Kits ?? besides Davis Diesel
I was wondering who or what companies make diesel conversion kits. I already know about Davis Diesel Development.
[link]http://www.davisdieseldevelopment.com/home.htm[/link]
Are there any other companies that make them?
I was wanting to try one on a rc car.
Your help is much appreciated.
Josh
[link]http://www.davisdieseldevelopment.com/home.htm[/link]
Are there any other companies that make them?
I was wanting to try one on a rc car.
Your help is much appreciated.
Josh
04-07-2005, 06:12 AM
#2
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RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
Josh,
Andrew J. Coholic; AJC makes them too (an RCU member, you can find him in these pages).
He can make them for nearly any engine, without a piston baffle (mostly Schneurle and TST engines).
And if he does not have the head that you want, you can send your glow head to him and he will use it as a template for the Diesel conversion head.
Both heads will be usable and sent to you by return mail.
Two spare Viton O-rings (for the contra-piston) will also be included.
His prices are more attractive than other sources.
Andrew J. Coholic; AJC makes them too (an RCU member, you can find him in these pages).
He can make them for nearly any engine, without a piston baffle (mostly Schneurle and TST engines).
And if he does not have the head that you want, you can send your glow head to him and he will use it as a template for the Diesel conversion head.
Both heads will be usable and sent to you by return mail.
Two spare Viton O-rings (for the contra-piston) will also be included.
His prices are more attractive than other sources.
04-07-2005, 10:46 AM
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RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
RJL Mecoa makes a few http://www.mecoa.com/acc/diesel/index.htm
He makes them for cox 049 ( fits Norvel) Cox 09 and OS 40
Reasonable prices and good quality. I have the 049 size on a Norvel and it works good.
Randy
He makes them for cox 049 ( fits Norvel) Cox 09 and OS 40
Reasonable prices and good quality. I have the 049 size on a Norvel and it works good.
Randy
04-07-2005, 07:14 PM
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RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
Sorry i am kind of a noob at this diesel thing. What is a piston baffel. I have rebuilt my HPI .18 SS enigine and the piston is a cylinar shaped slug of aluminum.
Will i still be alble to winde the engine up? Or is a rc nitro car engine that is converted to diesel just lug like a hores. I dont race or anything. I just bash i guess. I thought a diesel would be great for the torque in my hpi mt-2 ss 4x4 stadium truck. I would like to to still be resonable quick just not slow like a tractor.
Will i still be alble to winde the engine up? Or is a rc nitro car engine that is converted to diesel just lug like a hores. I dont race or anything. I just bash i guess. I thought a diesel would be great for the torque in my hpi mt-2 ss 4x4 stadium truck. I would like to to still be resonable quick just not slow like a tractor.
05-09-2005, 11:54 AM
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RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
Keep in mind that one of the reasons that your car engine turns up so high is the shape of the cylinder head. When converting to a Diesel cylinder head, all of that goes out the window.
Does that mean it will be a John Deere Diesel powered tractor? No. Some of the ducted fan boys were running Davis Diesel Conversion heads a while back and were obtaining surprising results. Better than glow? No, but very close.
Davis conversions, which you seem to be aware of, do not utilize a contra piston as is utilized in most made for Diesel engines. There simply isn't enough room in the cylinder head bore to make this possible, unless extreme measures are taken to reduce the size of the contra piston.
A piston baffle is a cast or machined fence that runs across the top of the piston from the front to the back of the engine. Its purpose is to deflect the incoming fuel charge upward, into the cylinder head portion of the cylinder. Otherwise, the fresh fuel charge would just jet straight across the top of the piston and out the exhaust port. This methodology was used in the old cross flow porting designs and predates Schneurle and TST porting, although it is still used in some engines yet today.
Don't be afraid to experiment. Experimenting is half the fun, and you can always sell your Diesel conversion head for a good price once you are finished experimenting, assuming the engine it is made for is popular.
Ed Cregger
Does that mean it will be a John Deere Diesel powered tractor? No. Some of the ducted fan boys were running Davis Diesel Conversion heads a while back and were obtaining surprising results. Better than glow? No, but very close.
Davis conversions, which you seem to be aware of, do not utilize a contra piston as is utilized in most made for Diesel engines. There simply isn't enough room in the cylinder head bore to make this possible, unless extreme measures are taken to reduce the size of the contra piston.
A piston baffle is a cast or machined fence that runs across the top of the piston from the front to the back of the engine. Its purpose is to deflect the incoming fuel charge upward, into the cylinder head portion of the cylinder. Otherwise, the fresh fuel charge would just jet straight across the top of the piston and out the exhaust port. This methodology was used in the old cross flow porting designs and predates Schneurle and TST porting, although it is still used in some engines yet today.
Don't be afraid to experiment. Experimenting is half the fun, and you can always sell your Diesel conversion head for a good price once you are finished experimenting, assuming the engine it is made for is popular.
Ed Cregger
05-10-2005, 07:16 AM
#6
RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
Dar or Ed,
What is TST porting?
I remember after the baffle came flat-top pistons on Super Tigre and K&B engines, then others. Don't remember a special porting name for those, they just had extra ports. Then PDP (Perry Directional Porting) and Schnuerle (or Schneurle) came along. Schnuerle required a new crankcase design. What previously had been the bypass port (across from the exhaust) was now the boost port and the extra ports were now the main transfer ports. PDP could often be applied without crankcase modifications. Both produced excellent results.
One of the problems that all of these improvements over the baffle solved was that at high speeds the exhaust side of the baffle would run HOT. That area became known as "Hell's Kitchen".
George
What is TST porting?
I remember after the baffle came flat-top pistons on Super Tigre and K&B engines, then others. Don't remember a special porting name for those, they just had extra ports. Then PDP (Perry Directional Porting) and Schnuerle (or Schneurle) came along. Schnuerle required a new crankcase design. What previously had been the bypass port (across from the exhaust) was now the boost port and the extra ports were now the main transfer ports. PDP could often be applied without crankcase modifications. Both produced excellent results.
One of the problems that all of these improvements over the baffle solved was that at high speeds the exhaust side of the baffle would run HOT. That area became known as "Hell's Kitchen".
George
05-10-2005, 07:41 AM
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RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
George,
TST is short-hand for Travasi Super-Tigre.
These are two upward-angled ports, opposite the exhaust port, which despite the flat-top piston and due to their angle, achieve what Schneurle ports do, in that the fresh charge does not go directly out the exhaust port.
They were introduced in old G20/15 engines, in the beginning 70s I believe.
But ST has since adopted the 'conventional' Schneurle porting + boost port, as most other engine manufacturers did.
TST is short-hand for Travasi Super-Tigre.
These are two upward-angled ports, opposite the exhaust port, which despite the flat-top piston and due to their angle, achieve what Schneurle ports do, in that the fresh charge does not go directly out the exhaust port.
They were introduced in old G20/15 engines, in the beginning 70s I believe.
But ST has since adopted the 'conventional' Schneurle porting + boost port, as most other engine manufacturers did.
05-10-2005, 06:42 PM
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RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
"TST is short-hand for Travasi Super-Tigre. "
Dar Zeelon,
Despite years of association with model aircraft engines of all types, including Super Tigre, I have never heard the term 'TST'. Nor have I ever seen it in print. We live and learn!
Nor do I recall the ST baffleless porting being taken up and used in any other common engines. Not surprising when you consider that, in the absence of a baffle or the opposing transfer ports of a Schneurle, much of the transfer charge went straight out the exhaust port.
The ST type porting to which you refer was never comparable to Schneurle porting in either layout or performance and was noted for high fuel consumption.
The only advantage of this form of porting was that it enabled the use of a baffleless piston with its attendant improvement in combustion chamber shape. This is where the performance increase was realised with the ST porting in comparison to a baffle piston layout.
ST were quick to add Perry-porting to their baffleless engines when its advantages were realised.
Were these engines referred to as "TST+PP"?
rgds
Dave Owen
Dar Zeelon,
Despite years of association with model aircraft engines of all types, including Super Tigre, I have never heard the term 'TST'. Nor have I ever seen it in print. We live and learn!
Nor do I recall the ST baffleless porting being taken up and used in any other common engines. Not surprising when you consider that, in the absence of a baffle or the opposing transfer ports of a Schneurle, much of the transfer charge went straight out the exhaust port.
The ST type porting to which you refer was never comparable to Schneurle porting in either layout or performance and was noted for high fuel consumption.
The only advantage of this form of porting was that it enabled the use of a baffleless piston with its attendant improvement in combustion chamber shape. This is where the performance increase was realised with the ST porting in comparison to a baffle piston layout.
ST were quick to add Perry-porting to their baffleless engines when its advantages were realised.
Were these engines referred to as "TST+PP"?
rgds
Dave Owen
05-11-2005, 12:05 AM
#9
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RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
David,
I don't think there were any large ST engines with TST.
I had a G20/15 C/L engine, which would scream on a 7x4.
PDP, as far as I know, was only incorporated into baffled-piston engines; not into any baffle-less piston engines.
Its function was to introduce more cool, fresh mixture on the hot, exhaust side of the baffle, adding to power as a fringe benefit.
I also had an HB.40PDP, which made more power than its contemporary, Schneurle ported engines.
I believe Clarence Lee still makes PDP converted K&B baffled-piston engines.
I don't think there were any large ST engines with TST.
I had a G20/15 C/L engine, which would scream on a 7x4.
PDP, as far as I know, was only incorporated into baffled-piston engines; not into any baffle-less piston engines.
Its function was to introduce more cool, fresh mixture on the hot, exhaust side of the baffle, adding to power as a fringe benefit.
I also had an HB.40PDP, which made more power than its contemporary, Schneurle ported engines.
I believe Clarence Lee still makes PDP converted K&B baffled-piston engines.
05-11-2005, 07:50 AM
#10
RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
ORIGINAL: DarZeelon
George,
TST is short-hand for Travasi Super-Tigre.
These are two upward-angled ports, opposite the exhaust port, which despite the flat-top piston and due to their angle, achieve what Schneurle ports do, in that the fresh charge does not go directly out the exhaust port.
They were introduced in old G20/15 engines, in the beginning 70s I believe.
But ST has since adopted the 'conventional' Schneurle porting + boost port, as most other engine manufacturers did.
George,
TST is short-hand for Travasi Super-Tigre.
These are two upward-angled ports, opposite the exhaust port, which despite the flat-top piston and due to their angle, achieve what Schneurle ports do, in that the fresh charge does not go directly out the exhaust port.
They were introduced in old G20/15 engines, in the beginning 70s I believe.
But ST has since adopted the 'conventional' Schneurle porting + boost port, as most other engine manufacturers did.
I remember the transfer ports being as you describe as opposed to the single bypass on the G20/15 with the removable crankshaft assembly. I never heard of the TST porting designation. Perhaps it was used only in Europe.
The first use of schnuerle porting that I remember is a .15 and (I think) a .29 used by Bill Wisniewski in his "WART" CL speed engines. These were later produced in a revised form by K&B. Later Bill blew the doors off of other competitors with his tuned pipe.
That's my story, and I'm stickin' to it.
George
05-11-2005, 08:18 AM
#11
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RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
George,
The first commercially marketed Schneurle ported engines were supposedly made by Hirtenberger (HP).
...But this is all history.
The HB PDP would out-rev the HP/OS/Webra of 1980, 1981, with that 'strange' porting.
The first commercially marketed Schneurle ported engines were supposedly made by Hirtenberger (HP).
...But this is all history.
The HB PDP would out-rev the HP/OS/Webra of 1980, 1981, with that 'strange' porting.
05-12-2005, 11:41 AM
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RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
ORIGINAL: jbooker82
I was wondering who or what companies make diesel conversion kits........
Josh
I was wondering who or what companies make diesel conversion kits........
Josh
05-12-2005, 10:53 PM
#14
RE: Who Makes Diesel Conversion Kits ?? besides Davis Diesel
I remember at least three .60's with PDP porting.
HB .61, K&B .61 and Supertigre G.60 bluehead.
The Supertigre X-15 FI was available with TST porting and was marked TST on the left beam mount. Early X-15 engines had G.15 internals. The TST version had a fully-finned head while the first few X-15's had the smooth head with a few fins over the exhaust port, like the G.15.
HB .61, K&B .61 and Supertigre G.60 bluehead.
The Supertigre X-15 FI was available with TST porting and was marked TST on the left beam mount. Early X-15 engines had G.15 internals. The TST version had a fully-finned head while the first few X-15's had the smooth head with a few fins over the exhaust port, like the G.15.
