ASP 46 with three different mufflers
11-01-2009, 05:50 AM
#1
Senior Member
Thread Starter
Join Date: Mar 2002
Location: GraftonNSW, AUSTRALIA
Posts: 433
Likes: 0
Received 0 Likes
on
0 Posts
ASP 46 with three different mufflers
I do testing for my own benefit & enjoyment & am happy to share my observations with everyone whose interested.
ASP 46 swinging an APC 10 x 6 with spinner nut. Fuel being 10% castor, 10% Klotz 200, 10% nitro & balance methanol. Ran the engine with 3 different mufflers to see the performance difference in changing only aspect of the engine setup - the muffler.
I used the following:
OS 873 muffler - 14,250 rpm
JENSD47 muffler - (obtained from Just Engines in the UK - this muffler bears has a passing resemblance to the Jett Stream muffler) 14,580 rpm
Tower Hobbies Aquacraft muffler - 15,090 rpm
The above tests were performed on a test stand. I later bolted the ASP 46 & Tower Muffler into my sports model & the performance improvement in the air over the standard OS873 muffler was very evident. "Bolt on" horsepower !
I did not have time to assess the JENSD47 in the air however bench testing suggests it should be a marginal improvement over the OS873 muffler, but a fair way short of the Tower muffler [8D]
ASP 46 swinging an APC 10 x 6 with spinner nut. Fuel being 10% castor, 10% Klotz 200, 10% nitro & balance methanol. Ran the engine with 3 different mufflers to see the performance difference in changing only aspect of the engine setup - the muffler.
I used the following:
OS 873 muffler - 14,250 rpm
JENSD47 muffler - (obtained from Just Engines in the UK - this muffler bears has a passing resemblance to the Jett Stream muffler) 14,580 rpm
Tower Hobbies Aquacraft muffler - 15,090 rpm
The above tests were performed on a test stand. I later bolted the ASP 46 & Tower Muffler into my sports model & the performance improvement in the air over the standard OS873 muffler was very evident. "Bolt on" horsepower !
I did not have time to assess the JENSD47 in the air however bench testing suggests it should be a marginal improvement over the OS873 muffler, but a fair way short of the Tower muffler [8D]
11-02-2009, 05:08 AM
#3
Senior Member
Join Date: Nov 2003
Location: Auckland, NEW ZEALAND
Posts: 1,324
Likes: 0
Received 0 Likes
on
0 Posts
RE: ASP 46 with three different mufflers
Nice work Bone - thanks for the data.
As you said, the JENSD47 sure looks like a Jett/UT muffler type but I wonder if it's just hollow on the inside rather than having an internal tube from the header to the "bell" at the end like the real deals.
Those Tower/GMS/Aquacraft mufflers have got to be the best non tuned muffler option available for a .46 sized engine. Our club swears by them!
As you said, the JENSD47 sure looks like a Jett/UT muffler type but I wonder if it's just hollow on the inside rather than having an internal tube from the header to the "bell" at the end like the real deals.
Those Tower/GMS/Aquacraft mufflers have got to be the best non tuned muffler option available for a .46 sized engine. Our club swears by them!
11-03-2009, 05:51 PM
#4
Senior Member
Thread Starter
Join Date: Mar 2002
Location: GraftonNSW, AUSTRALIA
Posts: 433
Likes: 0
Received 0 Likes
on
0 Posts
RE: ASP 46 with three different mufflers
ORIGINAL: Harry Lagman
As you said, the JENSD47 sure looks like a Jett/UT muffler type but I wonder if it's just hollow on the inside rather than having an internal tube from the header to the ''bell'' at the end like the real deals.
Those Tower/GMS/Aquacraft mufflers have got to be the best non tuned muffler option available for a .46 sized engine. Our club swears by them!
As you said, the JENSD47 sure looks like a Jett/UT muffler type but I wonder if it's just hollow on the inside rather than having an internal tube from the header to the ''bell'' at the end like the real deals.
Those Tower/GMS/Aquacraft mufflers have got to be the best non tuned muffler option available for a .46 sized engine. Our club swears by them!
Will pull it apart this weekend & post some pics.
The lads at the field were impressed by the extra power obtainable from the Tower muffler - I can see a bulk order being lodged from Australia very soon [8D]
