ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
09-30-2012, 04:53 PM
#1
ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
Who sells an adapter that will allow me to run an ASP 1.08 carb on this engine. I just purchased a project engine on ebay for a challenge. I will be running an ASP carb/Cline regulater for carburation. Tower lists the actual ST part # as discontinued. Does anybody know if Jett makes one since he has adapted a carb for the st2300. Does anybody have an old ST 2000-3000 parts engine that they would part with the adapter sleeve.
10-01-2012, 10:44 PM
#2
My Feedback: (3)
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
JustEngines from UK sell replacement carb for ST2300. (Open http://www.justengines.co.uk/acatalog/RC_Carbs.html and select option ST2300 at "ASP Series '3' 11mm venturi Carb")
As far as I remember the carb is an ASP120 unit with the adapter.
As far as I remember the carb is an ASP120 unit with the adapter.
10-02-2012, 03:22 AM
#3
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
I would suggest a Perry Carb. They are inexpensive and plug right in. The Perry 5001 (or 5002 for using a Perry pump with it) is what they say fit the ST 2300 engine.
10-02-2012, 05:57 AM
#4
My Feedback: (11)
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
This is the carburetor for the current-production version. It's currently out of stock, but we hope to have more relatively soon.
SUPG1805 12163765 CARBURETOR G2300 US$81.99
These parts can be ordered through any hobby retailer who sells SuperTigre engines and accessories.
You may have been looking at an old part number.
SUPG1805 12163765 CARBURETOR G2300 US$81.99
These parts can be ordered through any hobby retailer who sells SuperTigre engines and accessories.
You may have been looking at an old part number.
10-13-2012, 07:55 PM
#5
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
Well I fired her up today with magnum carb, and run 30 oz through it. I am currently getting 7,600 rpm with a Falcon 17-8 on home brew 5%, stock muffler and an F plug. The throttle responce is awesome along with the midrange. I plan on runnng a gallon through it on the stand to see what it does. This was a new G2300, that I fitted with a Bowmen ring and a Magnum 1.08 carb with the restricter removed (11 mm) venturi like the stock carb. I also have a stock G2300 that I plan to run with the same carb to see the difference. I have the cline regulater sittting here waiting to be tested. Even if I gave up a few rpm with a different carb, which I doubt since the Magnum carb is also 11 mm when you remove the adapter, this combo is for sure a keeper. You can idle it down to 2,000 and then transition to wide open with no rich midrange whatsover, and the engine is not even broke in.
Even if I gave up a few rpm with a different carb, which I doubt since the Magnum carb is also 11 mm when you remove the adapter, this combo is for sure a keeper. You can idle it down to 2,000 and then transition to wide open with no rich midrange whatsover, and the engine is not even broke in.
10-14-2012, 04:18 AM
#6
10-14-2012, 06:07 AM
#7
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
I think the 2300 and .90's use the same carb. Even the G51 uses the same carb as the S90, which has an 8mm venturi. Can someone tell me if the ASP/Magnum 108 carb has a neck size of .590"? If its the same neck size, I am going to get one and try it in my S90k for a few extra rpm. Currently I'm using the stock swing muffler, but will be using a mousse can pipe on it. I have no issues with transition or rich midrange - Its got 2 gallons+ on it now so it runs like a swiss watch. Spraybar is straight in. I use 5% fuel with 20% castor.
10-14-2012, 07:27 AM
#9
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
ORIGINAL: airraptor
why not just open the carb barrel up to the size you need?
why not just open the carb barrel up to the size you need?
10-14-2012, 08:15 AM
#10
My Feedback: (102)
Join Date: Dec 2001
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RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
Here is a side by side of the 4500 and 2300 carb, and the .90 carb, the 2300 carb and the 4500 carb are identical except the 2300 has fat spray bar to effectively make it smaller. The 2300 carb and the 4500 carb both have a 17mm neck, the adapter makes the .90 carb the equal of a 17mm neck, it does the same for the ASP 1.08 carb.
In Picture #1 the upper left carb is the 4500 carb, to its right is the 2300 carb and lower is the .90.
Ignore the sleeve in the 4500 carb, that was my own doing.
In Picture #1 the upper left carb is the 4500 carb, to its right is the 2300 carb and lower is the .90.
Ignore the sleeve in the 4500 carb, that was my own doing.
10-14-2012, 08:29 AM
#11
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
ORIGINAL: Hobbsy
Here is a side by side of the 4500 and 2300 carb, and the .90 carb, the 2300 carb and the 4500 carb are identical except the 2300 has fat spray bar to effectively make it smaller. The 2300 carb and the 4500 carb both have a 17mm neck, the adapter makes the .90 carb the equal of a 17mm neck, it does the same for the ASP 1.08 carb.
In Picture #1 the upper left carb is the 4500 carb, to its right is the 2300 carb and lower is the .90.
Ignore the sleeve in the 4500 carb, that was my own doing.
Here is a side by side of the 4500 and 2300 carb, and the .90 carb, the 2300 carb and the 4500 carb are identical except the 2300 has fat spray bar to effectively make it smaller. The 2300 carb and the 4500 carb both have a 17mm neck, the adapter makes the .90 carb the equal of a 17mm neck, it does the same for the ASP 1.08 carb.
In Picture #1 the upper left carb is the 4500 carb, to its right is the 2300 carb and lower is the .90.
Ignore the sleeve in the 4500 carb, that was my own doing.
S90K. 15mm neck, 8mm venturi.
10-14-2012, 09:08 AM
#12
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RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
Mine is an S .90, here are a ST .51 and .90 carb side by side, these are 9mm unless I measured wrongly, note thin spraybar of the .90 and fat spraybar of the .51. I have a collection of ST carbs people sent to me, the ride in the mail truck miraculously repairs them.
10-14-2012, 09:16 AM
#13
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
I misspoke in my last post. The venturi is 9mm. The 90 has the milled spraybar, the 51 indeed has the round spraybar. I'm going to head outside and run some props on the 51 now that its light enough out and not raining.
I like the ST carbs, but making a little extra power with a bigger carb doesnt bother me. I got it down pat adjusting and tuning the ST carb. Of the three ST's I have, the S29 was the easiest to tune even on a full tuned pipe.
I like the ST carbs, but making a little extra power with a bigger carb doesnt bother me. I got it down pat adjusting and tuning the ST carb. Of the three ST's I have, the S29 was the easiest to tune even on a full tuned pipe.
10-14-2012, 12:45 PM
#14
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
ORIGINAL: Hobbsy
Mine is an S .90, here are a ST .51 and .90 carb side by side, these are 9mm unless I measured wrongly, note thin spraybar of the .90 and fat spraybar of the .51. I have a collection of ST carbs people sent to me, the ride in the mail truck miraculously repairs them.
Mine is an S .90, here are a ST .51 and .90 carb side by side, these are 9mm unless I measured wrongly, note thin spraybar of the .90 and fat spraybar of the .51. I have a collection of ST carbs people sent to me, the ride in the mail truck miraculously repairs them.
10-14-2012, 12:47 PM
#15
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
ORIGINAL: Hobbsy
I wish I had something to trade you for the ST 2300 carb, it would be a perfect carb for my 4500 Diesel conversion.
I wish I had something to trade you for the ST 2300 carb, it would be a perfect carb for my 4500 Diesel conversion.
One of the carb's has about three backfires on it (do not want to munkie with it). The Maggie carb starts with just a backward flick of the prop, and took no tweaking to get it to run either.
10-14-2012, 10:19 PM
#16
My Feedback: (7)
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
The only thing that I really wish that Super Tigre would fix on the carbs is that the cam action does not move the low needle out of the spray bar enough, what i mean is that when my dad and i tune our 2300 on my plane and get it to idle nicely with no lag well the now needle is so far in the cats eye of the spray bar when you advance the throttle to wide open the idle needle is still thru the cats eye that you can take the high speed needle out eight turns and the engine will not richen up for nothing. I ruined a engine one time because the engine ran hot at WOT and would not restart and it had very low compression even after cooling down. It was that point that I had to just deal with a slightly rich low end setting.
I can only predict that super tigre did the cam action of the rotating barrel to aid in the mid range but at a cost of the high end WOT. What I believe would improve all their engines is to slightly redesign how the low end idle fuel is metered and to do this i think they can still use a cats eye opening just half a opening and the cam action of the rotating barrel to have a "S" curve.
I can only predict that super tigre did the cam action of the rotating barrel to aid in the mid range but at a cost of the high end WOT. What I believe would improve all their engines is to slightly redesign how the low end idle fuel is metered and to do this i think they can still use a cats eye opening just half a opening and the cam action of the rotating barrel to have a "S" curve.
10-15-2012, 12:16 AM
#17
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
Some of the early carbs had a dog-leg in the groove, but it caused the throttle to be non-linear and caused all sorts of midrange problems. I know some of the bigger Tigres benefit from drilling out the fuel inlet nipple and part of the spraybar to allow more fuel flow. PĂ© Rievers (pardon my spelling) is who I heard about this from and perhaps he may chime in with some info about the ST carb mods.
10-15-2012, 04:17 AM
#18
My Feedback: (5)
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
ORIGINAL: rglgatortail
The only thing that I really wish that Super Tigre would fix on the carbs is that the cam action does not move the low needle out of the spray bar enough, what i mean is that when my dad and i tune our 2300 on my plane and get it to idle nicely with no lag well the now needle is so far in the cats eye of the spray bar when you advance the throttle to wide open the idle needle is still thru the cats eye that you can take the high speed needle out eight turns and the engine will not richen up for nothing. I ruined a engine one time because the engine ran hot at WOT and would not restart and it had very low compression even after cooling down. It was that point that I had to just deal with a slightly rich low end setting.
I can only predict that super tigre did the cam action of the rotating barrel to aid in the mid range but at a cost of the high end WOT. What I believe would improve all their engines is to slightly redesign how the low end idle fuel is metered and to do this i think they can still use a cats eye opening just half a opening and the cam action of the rotating barrel to have a ''S'' curve.
The only thing that I really wish that Super Tigre would fix on the carbs is that the cam action does not move the low needle out of the spray bar enough, what i mean is that when my dad and i tune our 2300 on my plane and get it to idle nicely with no lag well the now needle is so far in the cats eye of the spray bar when you advance the throttle to wide open the idle needle is still thru the cats eye that you can take the high speed needle out eight turns and the engine will not richen up for nothing. I ruined a engine one time because the engine ran hot at WOT and would not restart and it had very low compression even after cooling down. It was that point that I had to just deal with a slightly rich low end setting.
I can only predict that super tigre did the cam action of the rotating barrel to aid in the mid range but at a cost of the high end WOT. What I believe would improve all their engines is to slightly redesign how the low end idle fuel is metered and to do this i think they can still use a cats eye opening just half a opening and the cam action of the rotating barrel to have a ''S'' curve.
Hope this helps.
Ed
11-04-2012, 05:30 PM
#19
RE: ST 2300 & MAGNUM 1.08 CARB = POWERFULL NO FUSS ENGINE
Well, I have run both 2300's now, and allthough the Brank Bowmen ring has spectacular compression compared to the other stock G2300, it is down 300-400 rpm in comparison (same carb muffler and prop run within 15 minutes of each other). I equate that to the fact that you have to rotate the sleeve a couple degree's to make sure the ring does not catch the port. The exhasut port window instead of being centered in the case, has to be flush on the right side, which missaligns the ports somewhat. Why in the heck ST made the ring like this is beond me. Franks ring does not have that feature, becasue he stated that it would be prone to breaking. I guess I will probably remove the Bowman ring, scuff the cylinder and install a stock ring in that one too. The Stock ringed motor only has a half gallon through, and it is making 300-400 rpm more than the Bowman ring with close to three gallons through it. Just something to consider, if contemplating a new ring. That kinda rpm is alot when you are taling about 8,600 vs 8,200 with a 17-8. I attached a picture of what the stock ring looks like.
