Factory chambers...Blaster vs Kawi vs SJ...

[Cannibal]

Can any one comment on the difference in power the different chambers make?

Obviously there is a difference in performance for each given design. For instance, the TNT chamber is supposed to have a decent increase in power from the SJ chambers, but what about comparing it to a Kawi 750 or Blaster Mod chamber of similar shape.

So, here's my list of chambers:

SJ Limited
SJ Mod
Blaster Limited
Blaster Mod
Kawi 750
Kawi SXR
TNT

Has anyone actually been able to compare any of these chambers to the next?

 

[restosud]

tried the sj limited,mod,blaster mod and tnt.
tnt hits the hardest no matter the rpm,from top to bottom and doesn't have the light switch effect that the sj limited sometimes has.
the sj limited hits better than the mod or blaster mod on the bottom but does sign off a little earlier.
the blaster mod is more smooth.
the sj mod pulls almost like the limited but no quite but is a little better on top and a little smoother.
this is on a 760 and a 815 lamey p/v.
all these chambers will work in different ways on different boats with different tuning so your mileage WILL vary!

 

[Cannibal]

Cool.

By the sounds of it, TNTsuperjet will be running many different chambers on the dyno. We might be able to see numbers for all of the pipes. That would be sweet.

My main reason for wanting to know; I've got a 750sx with Factory pipe. It hits really well. This engine and a pipe are going in my X2 and the 750 chamber won't fit unless I either build a new fuel tank, or run a kart tank (I don't really want to run a kart tank). Both SJ chambers and Blaster Limited chamber will fit with a little massaging.

Guess I'll wait fo TNT's numbers and go from there.

 

[#ZERO]

The shorter SJ Mod chamber will increase horsepower and raise the torque band in the higher rpm range to better suit ported engines with more modifications. The longer Limited chamber will produce a little less horsepower and rpm but will raise the torque slightly in the lower rpm range and the difference will depend on overall motor setup. The sj limited chamber was the first chamber designed for the 701 back when only the 61X/61X was around and the mod chamber was the result of racers looking to get more power out of their race setups, this is also how it became known as the "mod" pipe. The Blaster Mod use a center bleed design that improves the sonic wave reflection from the convergent or baffle cone section. It made out of stainless so it retains the heat better and is a bit larger than the SJ Limited chamber. The TNT chambers are similar design to the Blaster Mod but they have a muti angle difuser and stepped convergent cone section. The TNT is also larger in diameter on the main chamber body and a bit shorter with more of angle on the tail cone.

 

[Waternut]

Cool.

By the sounds of it, TNTsuperjet will be running many different chambers on the dyno. We might be able to see numbers for all of the pipes. That would be sweet.

Guess I'll wait fo TNT's numbers and go from there.

Just a couple things to consider. First, the TNT chamber is incredibly expensive. Second, they were built in low numbers and therefore incredibly hard to find.

 

[Cannibal]

Just a couple things to consider. First, the TNT chamber is incredibly expensive. Second, they were built in low numbers and therefore incredibly hard to find.

Ya, but there will be 25 new and improved units available sometime next year.

Not that I'll be able to afford one, but the fact that he's doing another run along with dynoing other Factory chambers for comparison is pretty sweet.

But as restostud said, just because (lets say for example) the Blaster Mod chamber comes in second in power to his TNT chamber on his setups, doesn't necessarily mean that it would come in second on my setup.

I suppose the only real way to know what chamber works best on your setup, is to try them all. That could get spendy.

Maybe we need a chamber exchange program.....

 

[egbrig]

How each pipe works also depends of the engine setup, and tuning. A center bleed vs. stinger makes very little difference since the mean point of the wave return occurs about half way down the convergence cone, so don't worry about that. There are many more pipe variances that matter but start with the basics. Most of the current pipes are very close in design and will work on different makes but not quite as well as the intended pipe. First deside how your going to set your engine up i.e: compression, porting, timing, ect. Then pick the pipe that is closer to your intension, then tune it. Seems most here tend to blame the parts rather than the tuning. Tuning also includes prop/nozzle combo.

 

[Crab]

Just get a blaster limited and be done with it.

 

[Cannibal]

Ya, I was thinking of seeing if anyone would want to trade a SJ chamber for a Blaster Limited.

 

[kevbo]

How each pipe works also depends of the engine setup, and tuning. A center bleed vs. stinger makes very little difference since the mean point of the wave return occurs about half way down the convergence cone, so don't worry about that. There are many more pipe variances that matter but start with the basics. Most of the current pipes are very close in design and will work on different makes but not quite as well as the intended pipe. First deside how your going to set your engine up i.e: compression, porting, timing, ect. Then pick the pipe that is closer to your intension, then tune it. Seems most here tend to blame the parts rather than the tuning. Tuning also includes prop/nozzle combo.

Pipe tuning is actually done at the pump.