201 replies to this topic

[455 TT Platinum Member]

So? what happened to all the dyno charts??

[stimps TT Bronze Member]

Looks like all the pictures that were hosted in the garage section have gone. Still have all the data if needed. Perhaps we should have a dyno section to host model specific charts only.

[Coop39 TT Bronze Member]

Sure would like to see those dyno runs? anyone!!!!
Thanks
Coop

[2strkr TT Member]

I have an 09 yz250 with a gnarly/turbine core 2. like to see what this set up looks like. it completely changed my low and mid.

[stimps TT Bronze Member]

Coop, send me a pm with you email and will send you the data. Thought you had it?

[d_mac TT Bronze Member]

 stimps, on 18 April 2012 - 12:57 AM, said:

Coop, send me a pm with you email and will send you the data. Thought you had it?

Good day Stimps.

Have you dynoed and tried the HGS pipe yet?

Cheers mate!

[stimps TT Bronze Member]

No sorry, place with the dyno got bought
Out and then closed. It's a good pipe though from seat of the pants. I've been chasing missing bottom end power on mine recently so using 2c pipe. Also just found a sub port on the power valve not closing properly due to worn guide blocks, hoping fixing those and it now set up perfectly will get it back spot on.

[d_mac TT Bronze Member]

 stimps, on 18 April 2012 - 11:32 AM, said:

No sorry, place with the dyno got bought
Out and then closed. It's a good pipe though from seat of the pants. I've been chasing missing bottom end power on mine recently so using 2c pipe. Also just found a sub port on the power valve not closing properly due to worn guide blocks, hoping fixing those and it now set up perfectly will get it back spot on.

Soon enough you would fix that mate, no worries at all.

By the way, when you described HGS as a good pipe by seat of pants, did you mean it's better than the DEP pipe?

Thanks for sharing.

[stimps TT Bronze Member]

I think the dep both on the dyno and to ride is the top end king for power and holding it the longest. The hgs is very broad and possibly offers more useable/broader power. I found myself using the clutch a little less on the hgs so would think it is stronger down low. Once engines back together I will do a back to back on riding impression between stock/dep/hgs if you like.

[dirtjumpordie TT Newbie]

You should make a lap time shootout

[BRM TT Addict]

 stimps, on 19 April 2012 - 09:48 AM, said:

I think the dep both on the dyno and to ride is the top end king for power and holding it the longest. The hgs is very broad and possibly offers more useable/broader power. I found myself using the clutch a little less on the hgs so would think it is stronger down low. Once engines back together I will do a back to back on riding impression between stock/dep/hgs if you like.

I'm of the same opinon Stimps, DEP produces mid-top power with the sacrifice of low-mid and gives plenty of over rev. HGS pulls better everywhere over the DEP and has good overrev but not quite at the level of the DEP.
For people who ride at the mid-top all the time the DEP will give the best results.
For people who use all the rev range the HGS is great.

Personnally, for the type of riding I normally do, offroad, the HGS delivers more usable, tractable power and still gives good over rev, which is what they claim to do. Produce usable power.

[BRM TT Addict]

 dirtjumpordie, on 19 April 2012 - 04:10 PM, said:

You should make a lap time shootout

That is the best way, I would bet my times would be better and more consistant with the HGS.

[d_mac TT Bronze Member]

 BRM, on 19 April 2012 - 07:42 PM, said:

I'm of the same opinon Stimps, DEP produces mid-top power with the sacrifice of low-mid and gives plenty of over rev.

That is why I don't prefer the DEP in trails. I'm 100% with my stock pipe right now.

Yet perhaps, I'd be 120% satisfied with the HGS once I own one. It's made in Holland.

[Snelens TT Newbie]

Ciscos is building my 250 and using a HGS. Should be running next week. I will post up the dyno sheet.

Are you using anything to protect the HGS? The TM guys whine that they are paper thin and dent easy. There is nothing off the shelf but moto-composites in Woolongong will make to suit, so would any of you guys be interested in a carbon fibre guard for your YZ HGS pipe? I wil send him an email and see what they will cost.

[BRM TT Addict]

 Snelens, on 29 April 2012 - 04:09 AM, said:

Ciscos is building my 250 and using a HGS. Should be running next week. I will post up the dyno sheet.

Are you using anything to protect the HGS? The TM guys whine that they are paper thin and dent easy. There is nothing off the shelf but moto-composites in Woolongong will make to suit, so would any of you guys be interested in a carbon fibre guard for your YZ HGS pipe? I wil send him an email and see what they will cost.

Definately be interested. depending on $. Not too obsene would be great.

Steve's dyno doesn't show big numbers like some others. Best to compare the before and after.

Edited by BRM, 29 April 2012 - 03:12 PM.

[Snelens TT Newbie]

Yes I here Steves dyno is low but honest.

He told me that one of his 125 motors was the biggest hp 125 engines seen on one of the PC or fmf dyno's (cant recall). I think it was Metcalfe's bike.

Edited by Snelens, 30 April 2012 - 02:46 AM.

[d_mac TT Bronze Member]

 Snelens, on 30 April 2012 - 02:14 AM, said:

Yes I here Steves dyno is low but honest.

He told me that one of his 125 motors was the biggest hp 125 engines seen on one of the PC or fmf dyno's (cant recall). I think it was Metcalfe's bike.

How can it be low and honest at the same time mate?
No pun intended, just trying to get the logic out of it....

I mean, let's face it, we're dealing with chassis-type dynos (not the engine-mounted dynos that manufacturers are using, specifically by car manufacturers). With the chassis-mounted dynos, we're only concerned of the before-and-after gains if there was any. The numbers you see at these type of dynos are only indicative. Same thing as what you see when we dyno our cars through the wheels. From the hp that you see in these chassis-dynos, torque is only back-calculated from the hp and rpm numbers.

Real hp is measured in several power curves and in series of different throttle openings and in a controlled environment, not the single representative line we normally see in chassis dynos under ambient environment settings.

[Snelens TT Newbie]

I understand what you mean on the dyno's.
A tool for tuning only etc it's just that the readings on the Ciscos dyno are supposedly lower then on other shop dynos with the same bike. Just saying.
Honest as in the figures aren't fudged to make owners feel better.

[BRM TT Addict]

 Snelens, on 30 April 2012 - 02:14 AM, said:

Yes I here Steves dyno is low but honest.

He told me that one of his 125 motors was the biggest hp 125 engines seen on one of the PC or fmf dyno's (cant recall). I think it was Metcalfe's bike.

That would have been on the FMF dyno as they were supplying the pipes for Metty's 125. If I recall correctly they did a test in one of the mags.. around 42 HP for a 125.
Last time I asked I think he still had one motor left.

 Snelens, on 30 April 2012 - 04:49 AM, said:

Honest as in the figures aren't fudged to make owners feel better.

[d_mac TT Bronze Member]

 Snelens, on 30 April 2012 - 04:49 AM, said:

I understand what you mean on the dyno's.
A tool for tuning only etc it's just that the readings on the Ciscos dyno are supposedly lower then on other shop dynos with the same bike. Just saying.
Honest as in the figures aren't fudged to make owners feel better.

Was just messing on yah mate.
Might give it a try. Thanks for the tip man

Kind regards.