Actual Dyno numbers

[KnappAttack]

More compresion will always make more power with same amount of boost. Only drawback is higher octane fuel. Why do you want a side mount? Lower center of gravity and stock tank is the only plus. Greatly reduced HP is a huge negitive, as well as loss of reverse for us flatlanders.

 

[mulot30th]

More compresion will always make more power with same amount of boost. Only drawback is higher octane fuel. Why do you want a side mount? Lower center of gravity and stock tank is the only plus. Greatly reduced HP is a huge negitive, as well as loss of reverse for us flatlanders.

I did want it because of capacity to exit the exhaust somewhere else than the tunnel and did not like the idea of reduced fuel tank at all...

reverse is not that big a problem for what I do with my apex mountain.

beside that... I did use the parking brake lever for reverse lever on my rx1 mountian and now use a mountain performance parking brake handle which both saved me some weight and ... I did not like the yamaha way to do the parking brake at all.

 

[gucciboy]

Glad to see some people have tested and are willing to share info. I Have always relied on testing with a dyno. More to see what and where everything is happening than looking for a number. For people looking to get on the rack, Greg at JAWS has built a new dyno cell with state of the art equipment (all Superflo) and he is a top notch operator to boot. I am hoping to get up there this fall to see what i can make, then off to the grass to set it up. As they say "cant race a dyno"

 

[gucciboy]

anybody notice a problem with dumping the exhaust straight into the tunnel facing drive axel?? Do i need to turn it down?

 

[mulot30th]

anybody notice a problem with dumping the exhaust straight into the tunnel facing drive axel?? Do i need to turn it down?

I turned it almost 180 degrees to a 'side' exit just like they do on turbo M7 sleds.

 

[efiguy]

Boondockers have a real poor header design for making power. Very poor. Not to mention you have a ton of compresion out of that engine. Thats not to efficent either.

The header design does have some obviouos inefficiencies, but it was designed to solve the front-mount issues of having to modify/replace the gas tank, underhood heat problems, and the header cracking issues, but it still works very well for it's intended use (responsive boost in the 15-20lb range). For this season a new optimized mid-mount header has been designed to be used with the rev gas tank for those looking for more boost with better efficiency.

I remember having some disagreement with the boost numbers shown on the dynotech report (in hammer's post above). The numbers displayed on the actual dyno sheets were not correct because the dynotech boost sensor was not programmed correctly with the dyno software, so I penciled down the numbers we thought we were at. We weren't really paying attention to the exact boost numbers at the time, but I remember after Jim wrote the report the numbers he calculated seemed low compared to mine, but I don't remember if we determined what the discrepency was. But this particular motor was designed for nitrous use as well and the lower compression definitely brought the numbers down compared to some dyno numbers I have that show better numbers (for the same boost amounts), but were done with a little higher compression motor.

 

[WesG]

New header design and fuel tank.

Is this new mid-mount header going to be offered as an upgrade to existing kits? Does it use a different intercooler? How about an exchange program where we send our old header, mounting brackets, intercooler, etc in and recieve a discount? I do not know how many BD kits are out there or if it would be worthwhile, but I would definately be interested in this as I have been contemplating Mitch's(synergy's) conversion.... And my sled is apart right now anyways LOL back to the topic, you better put some #'s up for this mid-mount.

Wes

 

[mulot30th]

Boondockers have a real poor header design for making power. Very poor. Not to mention you have a ton of compresion out of that engine. Thats not to efficent either.

The header design does have some obviouos inefficiencies, but it was designed to solve the front-mount issues of having to modify/replace the gas tank, underhood heat problems, and the header cracking issues, but it still works very well for it's intended use (responsive boost in the 15-20lb range). For this season a new optimized mid-mount header has been designed to be used with the rev gas tank for those looking for more boost with better efficiency.

I remember having some disagreement with the boost numbers shown on the dynotech report (in hammer's post above). The numbers displayed on the actual dyno sheets were not correct because the dynotech boost sensor was not programmed correctly with the dyno software, so I penciled down the numbers we thought we were at. We weren't really paying attention to the exact boost numbers at the time, but I remember after Jim wrote the report the numbers he calculated seemed low compared to mine, but I don't remember if we determined what the discrepency was. But this particular motor was designed for nitrous use as well and the lower compression definitely brought the numbers down compared to some dyno numbers I have that show better numbers (for the same boost amounts), but were done with a little higher compression motor.

I do have a stock compression motor with equal compression on all 4 pistons and 4%-6% leakdown (I checked it) and the dyno numbers I got are for real... no tuning issue either (on the 18psi run at least!)

 

[mulot30th]

By the way here is a touched up picture to clearly show you where I re-routed my BD exhaust!!!

 

[rx1 fern]

hi guys,i am running a powderlites front mount on my 04 rx1 .do you guys think it will make more power with a turn down pipe facing the top of the track or with the y pipe that i had fabricated to meet up to my whiteknuckle exhaust so i could run the exhaust out the back still.please let me know.thanks.

 

[mulot30th]

the less exhaust backpressure, the quicker you'll get boost, and possibly a bit more hp...

The less intake vacuum you'll get at intake, same thing.

this all can lead you into a better efficiency zone (see your compressor map) depending on your boost level.

 

[TurboJamie]

hi guys,i am running a powderlites front mount on my 04 rx1 .do you guys think it will make more power with a turn down pipe facing the top of the track or with the y pipe that i had fabricated to meet up to my whiteknuckle exhaust so i could run the exhaust out the back still.please let me know.thanks.

If you are a flat land rider you have to exit out the rear of the tunnel if you don't the track builds positive pressure in the tunnel causing your exhaust to back up into the turbo. Lots of us found out about this the hard way.

 

[mulot30th]

I have never liked that exhaust on the tunnel idea....

 

[Need for Speed 2]

been there done that. in the tunnel no top end speeds

 

[efiguy]

Re: New header design and fuel tank.

Is this new mid-mount header going to be offered as an upgrade to existing kits? Does it use a different intercooler? How about an exchange program where we send our old header, mounting brackets, intercooler, etc in and recieve a discount?

The new header is part of the new twin-turbo setup (being tested now), but it could be used as an upgrade for a single mid-mount setup, using as much of the old kit as possible. I don't have much more info than that right now - stay tuned!