just got back from the dyno. we dynoed two bikes


bike one

oem piston
TTM PORTING
web cams
esr intake
sparks exhaust.
39mm fcr carb
dyno results 47.89 ftlbs of torque


bike two
fci intake
95mm 13:5 piston
web cam
ttm porting
42mm fcr carb
nmotion exhaust
dyno results 48.25 fl lbs of torgue.


once i figure out how to pull the graphs off my email i will post so everyone can see the graphs.

Awesome numbers man!

What HP are these putting down?

the hp numbers werent what i had hoped for but i was shock when the torque nembers came up. told the dyno man thats not right so we checked everything and made 4 more runs and all the torque curves came up within .6

the hp numbers stayed at right around 48 on bike 1 and 49.5 bike 2.

just so everyone knows its not my own personal dyno as there will be talking that these numbers arent true and are done with dyno magic, ever what the hell dyno magic is. i do know bike 1 will keep up out of the hole with my (70+ hp 52.3 ft lbs) bike and had no idea why until this morning.

What are stock yfz Torque and horse #'s?

called the dyno man and he pulled up a sheet of a stock yfz at 33.4 hp and 28.3 ft lbs.

DAMN. Thats quite an increase i would say. Cant wait

What kind of dyno was this on?

dyno jet and the model is a 188 i do believe.

47 ft lb of torque with porting and bolt ons 'eh lol? might want to run thoes on a different dyno.....

Interesting.....thats a lot of torque. Congratulations on your incredible builds. That is the most torque I have ever seen on a stock bore OEM piston'd quad. Thats more like BB kits put out....

What rpm was the HP and TQ at? I've seen mis calculated dyno's read the hp correct but the tq was way off... like a 52hp motor putting out 60ft. What happened was another shop employee was dynoing a car or a shee and had the tach read set up wrong. Could this have happened? If not that is very strong tq especially compared to the hp.

like i said once i get the sheet off my email. if some one can help me out here. i will post the graph so everyone can see it.

like i said before its not mu dyno, its the local harley davidson mod shop.

i can give you guys the number of the dyno shop to call to verify my numbers if you would like.

i know everyone on here reading this thinks iam a lieing S.O.B and it cant be done, if someone else was to post this i would have been saying the samething without seeing it for my own eyes. i am going to the dyno right know to run it again and get the sheets off the computer so everyone can see.

I want to be the first to say that I do not think you are lying and as a paying vendor here I do not think it would be in your best interest to lie, just I have seen that very thing a few times over but knowing what I saw I also knew what caused it. I was just asking if a mistake could have been made when they were setting up the program for a atv, and one that fires a spark on every TDC,

If you need a file posted you can email it to me and I can see what I can do about posting it.

tersejr@yahoo.com

Better yet you can just send me one of your ported heads and I will dyno it back to back with one of my four heads

heres the sheets

Need the sheet with the Hp over laying Tq in RPM's

But the curve looks nice

you will have to wait on that one as i am going back to the dyno on wednesday to dyno other build and i will pick up the sheets you are asking for.

I am still not convinced. Intrigued, but not convinced. Seems like there isn't alot of mph for the tq output. Less mph could mean less rpm, which goes back to the tach signal not being set up right in the computer section of the dyno.

Man i dont want to dis. your motors but i dont see anyway of getting as much TQ as HP not possible IMO.

Besides i have never seen any stock bore put out that kind of TQ on my stock bore with stock valves and a 15-1 comp. piston i could only get 36TQ and that was with 56hp.

i'm with terse on this one we have had a lot of quads on the dynojet dyno here and non of the stock bore ones make that kind of power, even theone with the TTM HEAD and hight comp. piston. We will be on the dyno tonight with a motor we just put together that has a WR crank in it and the TTM HEAD, i will try to get the numbers up in the next day or so. The head worked well on the other motor we had it on so i'm no trying to knock TTM , they did a nice job. I just think the dyno opperator or the guy who set it up didn't know what they weere doing.

i am trying to find other dyno in my area to double check these numbers but the next closest one to me is 5hrs away and he said they dont have torque graphs do to something wrong. i would like one of you that know things about a dyno to call the dyno shop and talk to him just to see if these numbers are right. like i said before i dont know sh!t about a dyno and also i almost fell over when i saw them numbers so you would be doing all of us a favor by calling him. names tim and his number is on the dyno sheet at the top

calculations could be made right from thoes graphs if you really want to see the HP lines. HP and Torque are directly related.

HP = TQ*RPM/5252

obviously the formula can be re-aranged to suit your needs.

if that is right my numbers look to be really close maybe about 2 ft lbs high. like i said will verify all the numbers on a different dyno.

thanks to terse and climb-101 and running a different dyno we have found that my graphs are high.
i redynoed at a different dyno and got these results. torque 39.56
i then stopped back at my dyno man told him what to change and dynoed there and the results are 39.35. thanks to all for the help and sorry for the false info. i have got the sheets and will post sometime. i also dynoed a new stockbore which i will post also later today.

That is still great TQ numbers non the less. Impressive. :)

nice numbers

what build?

Stock bore, TTM Head, Stock Piston, I believe web cams, Cam modded, Stock carb, sparks exhaust, esr intake. Correct me if i am wrong Derek. I believe that was what he was asking for...

Them numbers are awesome man!! 40lbs lbtq on a stock bore is no joke. I cant wait to see what mine is putting down!

these stockbores have alot of internal lighting of parts, custom pistons, different cam degree. these are all stock stroke also.

so these are stock un-bored out carbs? what are these bikes making for hp if you dont mind sharing?

i wont give out my hp numbers do to everyone saying these numbers are impossible, and yes with stock carbs 39mm. like i said before theres alot of custom lighting of internal parts. the cams are in at a different degree and center lines have been moved, these webs are a different cam then what everyone on here has been running. this bike is running a full race head from TTM RACING and still has the stock valves, springs are aftermarket so it can handle the race cams.

we our going to be putting our piston out for sale for everyone to buy not just the national motors we do.

With 40lb's of TQ you would have to be @ least 65+hp on a stock bore.

On the webs are you guy's chaning the center lines or is that something web is doing for you?

Just wondering is all i guess i need to tear into my stock bore alittle more and see what i can get since i am only getting 36-37lb's of TQ.

im sure those extra lightened parts have something to do with be able to achieve such awesome numbers with the mods on these bikes.

web makes me anything i want do to a strong tie with them for years. web does change the center line to what ever we tell them. theres alot that goes to it when you start changing center lines as what works good for drag racing dont work good for the mx builds. one other thing is what degree are the cams going in at which will help also.

So you will have your own pistons now too? I assume then you won't be selling or recommending anymore Venom pistons? I remember reading your post about how you recommended the Venom pistons and how they have worked very well in your builds, then you announced that you are a Venom dealer, and now you are offering your own pistons. It doesn't take a big crayon to connect those dots. Especially since you have claimed to know nothing about dyno's...

But to each their own. Good luck with your builds and continuing with the level of customer service you have been providing here on YFZCentral.

i will still recomend venom pistons, to the everyday rider.we have had our own pistons for about 2yrs now and our pistons work very well for the racer and are a little pricey. our pistons are very lite and work well under extreme heat loads which is all incountered by racing motors. i said i know nothing about dynos which is true, i only read the graphs that they print out for me and if you want to get into an R&D forum i would be glad to seen how we have build some off the best motors in the buisness for a couple years now. a guy i work very close with is known as mr torque in the candian road bike series and has work for many top names in the bike road racing series. when our minds work together we make great numbers and great motors.

we havent dynoed a venom piston to one of ours as our pistons only go into national atv and bike motors. i have never siad anything bad about venoms work or have i seen any in person. i do know theres venom builds out the that rip.