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quadracer707
11-24-2006, 08:56 AM
Can U guys help me out looking to get most out of our quad

Here is what I have now wondering how much HORSEPOWER

2004 YFZ

TRUE 450
WISCO PISTON 12:1
INTAKE & EXHAUST HOTCAMS
MILD PORTING
CURTIS SPARKS EXHAUST

what do you think H.P. is now???/

LOOKING to put different ignition system on I have nothing special on now.

Will any off these make a difference??, & if so how much

I do MX racing

VORTEX PROGAMMABLE IGNITION
OR
DYNO TECH

I have raced a couple guys in "B" class that have real good ignition systems & they are smoking

Thanx wade

Mobile Dyno
12-01-2006, 08:55 AM
With the mods you listed, I would say you are around 47-49hp Dialed In properly. if the porting is good. An 04' 450 with a pipe dailed in will make 44. Your compression is almost stock for that bike. As far as an Ignition, I would go with Dynatek. I have tested the Vortex and the setting's show no noticable difference. The Dyna is programmable which meand you can make custom curves for it. I say Dynatek. Vortex is Adjustable not Programmable. it has i think 10 settings you can choose from on the box. Dynatek you change the curves of the ignition with software and upload the new curves. They both are better than stock.

quadracer707
12-01-2006, 12:58 PM
Thank you soo much for this info especially on ignition. How much more H.P. will this add to my quad with the Dynatek. We were leaning to the Vortek until know & saving some money. Thanx again for you knowledge.

Mobile Dyno
12-04-2006, 08:40 PM
With the Dynatek you may see 1-2 hp difference on the factory curves they send you. May see more with custom curves made for your setup. But you have to spend some time on the dyno for that

quadracer707
02-09-2007, 05:46 PM
NEW UPDATE 2004 YFZ 450

NEW MODS WHAT KIND OF HP

NEW COMPLETE VALVE JOB SPRINGS LIFTERS TOP END
PORT & POLISHED AS MUCH AS YOU CAN MODIFY
13:1 PISTON
NEW CLUTCH CASE DONE OVER ALSO
TRUE 450
DYNATEK IGNITION
STOCK CARB

raeson iam asking we took out today & this thing runs like a raped ape awesome, curious if hp's might change much. unbeleivable torque &bottom end

Thanx Wade

quadracer707
02-19-2007, 05:56 AM
ANY HELP OUT THERE?????????????????

ghott
02-19-2007, 10:55 PM
50-couple?

IDK for sure....Hopefully Matt will be able to answer the question.

Seems to me that the porting will be the "wild card" if you will. Who did the porting?

quadracer707
02-20-2007, 06:44 AM
Advance Maching Services did the porting, He is a local guy that know one knows about, beacause he does not advertise locally. He ported out all that is left to do & put on his bench flow. I know people do not know him but he does a great job. My 440ex was able to BEAT alot of 450's because of his engine building. What is the diference between 12:1 & 13:1 piston. My son will be going to MMI in orlando, in nov. & iam just trying to understand it all.
Thanx Ken

quadracer707
03-22-2007, 07:19 AM
bump,

any new info help guys please just curious

383chevel
04-26-2010, 09:30 PM
"PORT & POLISHED AS MUCH AS YOU CAN MODIFY"
okay thats a stupid thing to say.
your probly around 49 horsepower. 450's are already pretty maxed out, theres not much more for them. while i was getting my raptor 700 dyno'd (14:1 CP piston, hotcam stage 3, +2mm throttle body, dual barker exhaust, powercommander) there was a 2006 yfz450 on the dyno before me. he had a drag pipe (side pipe) porting by curtis sparks, webcams, high compression (duno how much just that he dumped in some 110 before the run) dynatek ignition, and a bored carb. he made a best pull of 49 horsepower.
oh, my raptor made 61 horsepower, with the powerband of a 450 by the way :) i have a dyno chart in hand if you dont believe me.

Shipman93
05-18-2010, 08:36 PM
The truth does lie in a port and polish but it needs the works done to the motor to make everything work right. The best motor builders port and polish differantly for differant exaust systems also. With everything done to mine I'm getting 63.2 hp and 54.4 torq. I run 114 sonoco w/2.7% oxidized. O ya and it is still a 450. S0 you can get hp out of a 450 but it justs takes some money and a good motor builder. SO good luck with you motor wade. If you really want more power make sure somebody who really knows what they are doing does the porting and polishing.

witech
05-19-2010, 01:25 PM
Originally posted by Shipman93
The truth does lie in a port and polish but it needs the works done to the motor to make everything work right. The best motor builders port and polish differantly for differant exaust systems also. With everything done to mine I'm getting 63.2 hp and 54.4 torq. I run 114 sonoco w/2.7% oxidized. O ya and it is still a 450. S0 you can get hp out of a 450 but it justs takes some money and a good motor builder. SO good luck with you motor wade. If you really want more power make sure somebody who really knows what they are doing does the porting and polishing.


Do you mean 54 horse and 36 footpounds of torque because I am pretty sure it would be impossible to get into the mid forties much less 50's on any 450cc engine unless it had an extremely high amount of boost ,nitrous ,or both. What dyno did you use and who was the operator?

Shipman93
05-19-2010, 05:13 PM
No this is what I as well as the rest of the pro's in the National TT series get out of our quads. It is not impossible. Actually the guys like Goodman and Coburn are getting around 66 hp. On mine the max hp is at about 10,200 RPMs with max torq at about 8,900. These pulls are with TT tires too. With these tires you will see about 4 hp increase compared to knobbies. Like I said truth is in the porting. Also remember we only get about 15-20 hours out of a motor and if Bud built a motor like mine he would charge about $6,000 for it.

witech
05-19-2010, 06:08 PM
When you post up your dyno charts please do it in SAE and with smoothing at 5. The name of the dyno and location as well.

machwon
05-19-2010, 08:23 PM
Here's one from a shop close to me in MI, yes they don't last long.

http://www.ronhamp.com/dynosheets/trice_welchyz2003.aspx

John Noftsinger
05-19-2010, 08:43 PM
How the hell did you get 54 torque thats amazing the most Ive ever seen got to show dyno on that not that Im calling you a liar but wow!Thats got to be THE torque monster of all time !

Buttermilk
05-21-2010, 11:16 AM
Here's a friends 2005 450R, stock bore/stock stroke built by RAGE.

Local dyno at Tulsa, OK (www.sandtrax.com). Dyno'd at 62.2 HP on RAGE's dyno.

Rog

witech
05-21-2010, 12:30 PM
Id call that a realistic dyno chart with an extremely well built engine. 60 hp is right around the most you can see in a naturally aspirated engine. Thats seeing well over 100 VE. Just fantastic . I havent built very many 450 cc engines but here is one Cannondale that has no trouble beating a lot of other quads claiming to be well into the 60's. From the first dyno run till the last after tweaking the EFI . Engine has a 14 to 1 CP piston ,ported head,throttle body , dual exhaust,corvette injectors. All other parts are stock.
Stock 432 motors put out 35 to 40 hp on this dyno (mikes cycles)

witech
05-21-2010, 12:38 PM
Buttermilk could you repost the charts with engine rpm instead of wheel speed. Kind of skews the lines . But if you dont have a tach reading speed is the only option.

Buttermilk
05-27-2010, 02:08 PM
Here's the same run in RPM's. This quad is a very excellent running quad. Belongs to a friend of mine.

We are still trying to get my son's to that level. Hope to make some progress soon on it. Currently we are at 56.3 HP and next dyno session will be with a cam swap that I hope will pick up ~ 2 HP or so. May be changing pipes as well....

Regards,
Rog

Buttermilk
05-27-2010, 02:13 PM
Here's my son's 450R. Still got some work to do to it. But we are getting there.

A couple of changes in the works that should bump up the power a bit.

This particular run had a glitch in the pickup of the RPM, hence the dip towards the end.

Rog

Buttermilk
05-27-2010, 02:23 PM
Sorry to hijack a thread, but here's a 2004 YFZ450 (my wife's) that has the following mods:

Sparks full exhaust
Stock cams, exhaust cam modded
Stock carb
FCI intake w/ No Toil filter, no airbox
Hot Rods 63.4 stroke crank (450cc)
JE 12.5:1 pump gas piston

This quad is probably the exception, as most with similar mods are only ~47-49 HP, including my other YFZ450.

Buttermilk
05-27-2010, 02:31 PM
Here's my own 2005 YFZ450:

Mod's:

Cam mod, stock cams
FCI intake with No Toil filter, no airbox
Cleaned up head, very mild porting (didn't help it at all...)
Hot Rods 63.4 stroke crank (450cc)
JE 12.5:1 pump gas piston
Ron Wood Racing exhaust

This is where a lot of the YFZ's dyno at on the dyno I use with similar mod's.

Rog

John Noftsinger
05-30-2010, 10:17 AM
If all these guys that you said have the same then lets see a dyno of 63hp/ 54torque IMO too get 54 torque it would have to be around a 100hps+ IMO. show us these dynos of 54 torque !

Shipman93
05-31-2010, 08:59 PM
Ok so I would like to apologize for all the controversy I have caused. The dyno results I got that showed those numbers were from a place in Ashtabula, Ohio last year. I do not know if the dyno was new and not calibrated right or what but the numbers and the graph he gave me were different than the ones I got last weekend. I had it dynode again here in Missouri and it showed 62.3 hp and 41.9 ft-lbs torque. My guess is these are more correct for my quad. I’m not sure how that dyno was off by that much but I am truly sorry for my post earlier. As soon as I can get my scanner working I will post my new graphs. Again I apologize for my false numbers I feel really bad. I am calling the guy that did my dyno in Ashtabula tomorrow to ask him how the numbers could have gotten so far off. I will let you all know what I find out.

TitanMotorworks
06-03-2010, 10:30 PM
where at in Missouri do you live? I'm 50 miles from St.louis and own a dynojet dyno.

John Noftsinger
06-06-2010, 10:23 PM
Shipman93 ,what do you ride with that kind of hp/tor dune,s/trails /drag ?