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Post Info TOPIC: Shorty header pipe Fitted - Dyno before and after.


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Shorty header pipe Fitted - Dyno before and after.
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There has been a lot of talk about the benefits of the shorty header pipe on the TTR , but all the evidence anecdotal from magazines and rider impressions.

General consensus is a 2 hp gain with the shorty.   That's decent, about 10 % on a TTR. 

Recently Kiwi Jeff offered his opinion on his shorty header after he swapped header pipes back and forth, and I bit the bullet and ordered the TTR's Only pipe.   (Thanks Steve, came very well wrapped along with the other goodies)

Well its been fitted and run and tuned on the dyno.    Dyno runs were done with the standard header pipe and then the shorty.

I'm off to pick it up now.

Stay tuned, I will post up the dyno graph and give my riding impressions.

 

smile

 

 

 



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Ok, so on my bike, the TTR's Only shorty header pipe was good for an extra 1.5 hp on the dyno .

A quick spin in 3rd gear up the driveway and it feels like it now builds revs a lot faster, definitely noticeable and the bike feels faster.
Might have given up a little slightly off the bottom won't know until I take it on a decent trail ride.

21.5 HP to 23 HP. 7 percent increase with header pipe alone.



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TTR DYNO.jpg



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TTR250 header and plastics..jpeg



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Hi Kaos and others,

Well that pretty well stuffs my theory that the Shorty Front Pipe gave me the impression that there was more power at lower revs and confirms the mid-range theory.

Just a tip Steve, for the next batch of these that you get made, on mine it is very close to the frame, back near to where the joint is. Maybe your manufacturer could put in a little more bend or put a small dent it there. It doesn't hit the frame but it is very close.

I am also following Lyndon Poskitt on his Dakar journey, thanks to the link posted on this Forum a few days ago. I went back to the beginning and watched all the 10 minute "episodes."

I was wondering why his two mates weren't helping him with the bike at the end of a tough day of riding but now know that he is in the Class where he has to do everything himself. A great young guy with a top attitude.

I am abit "shaken and not stirred" at the moment as yesterday I got caught in a 5 car "Nose to Tail" on Auckland's Southern Motorway. I was in our Jeep Patriot and was in the middle of the mayhem and ended up sliding down the road on the left hand side. Once stopped I was out of there in a hurry because of a possible combination of fuel leak and sparks. Our poor Patriot will be a "Write Off" as several Air Bags deployed and that is a "car killer." We are fully Insured thankfully.

Cheers and lotsa beers

Jeff



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Jeff, thats not good news but the main thing is you are ok. Thats why we pay insurance I suppose.

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Yep... been saying that for 3 years now....
the motor revs quicker with the short header pipe...
mine dose also have a GYTR pipe aswell..



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Bikes... 06 TTR250 / 09 XT660R / 1977 Montesa Cota 348 MRR / 1979 Montesa H6 125 Enduro...

O yer and a Quad...



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20180120_204803.jpgGYTR pipe like this one?

 



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Excellent news Steve and thanks for going to the effort!

A nice easy way to get some extra ponies for your TTR plus I think the shorty pipes look great biggrinbiggrin

Brian

PS Sorry to hear of your incident Jeff. Good news that you are OK.



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no.. mine is the earlyer version that was made by scorpian for Yamaha..
they were realy loud...but i managed to fit a DB killer into it...



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Bikes... 06 TTR250 / 09 XT660R / 1977 Montesa Cota 348 MRR / 1979 Montesa H6 125 Enduro...

O yer and a Quad...



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This GYTR is actually pretty quiet at idle and small throttle openings, it shouldn't annoy anyone just putting around. But when you open it up it gets a loud bark and you can hear it going down the road or through the bush.

I don't if its the best muffler option out there but it seems ok and heaps lighter than the stock metal one.

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