Author Topic: Manipulated Dyno #s- I'm Sick Of It! Video Inside (Read 16324 times) Tweet

Professor · « **Reply #50 on:** December 11, 2007, 11:36:45 AM »

Well it is about time that DynoJt cared enough about it to make a phone call. But they need to be more worried about the inconstancies with readings from dyno to dyno than someone jacking with it.

Chuck Wilburn · « **Reply #51 on:** December 11, 2007, 11:40:21 AM »

The majority of the inconsistancies are from people jacking with them.

entropy · « **Reply #52 on:** December 11, 2007, 12:09:08 PM »

Fantastic thread, fan-tastic...!!!

396 · « **Reply #53 on:** December 11, 2007, 12:35:11 PM »

Looks like it is getting more attention than imagined.

Mospeada · « **Reply #54 on:** December 11, 2007, 12:42:38 PM »

I'm sure Dynojet is really concerned. But still, it's up to us, to see our bikes tuned and mapped, *with* the a/f ratio shown, and maybe the BP info on the dyno chart itself.

Local airport BP - altitude = corrected sea level BP. Gotta remember that one.

Chuck, you are the freagin' man. One of the better threads I've read in a long time.

Chuck Wilburn · « **Reply #55 on:** December 11, 2007, 01:05:32 PM »

Thanks guys- the video had over 3000 views. If half those people called Dynojet....... I can see why they're a little steamed!

enginetuna · « **Reply #56 on:** December 11, 2007, 01:22:15 PM »

Half were probably from shop owners who have now got to redo their website dynocharts from 230bhp down to 215bhp

DarkFalcon · « **Reply #57 on:** December 11, 2007, 01:43:15 PM »

It's odd how much noise DJ is making now because when a Canadian mag published a feature on cross variation of DJ results the Company was unavailable for comment...........or something to that effect.

Chuck Wilburn · « **Reply #58 on:** December 11, 2007, 01:54:14 PM »

They probably didn't want to make a public comment in a magazine- but then again, that magazine wasn't clogging up their phone lines! Just to be clear- I have no problem with DJ or taking the vid down, I understand completely where they're coming from. I love my DynoJet250i- use it practically everyday!

entropy · « **Reply #59 on:** December 11, 2007, 04:02:46 PM »

Quote from: Mospeada on December 11, 2007, 12:42:38 PM

Local airport BP - altitude = corrected sea level BP. Gotta remember that one.

I thought it was:
local airport BP (which is reported corrected to SL) - altitude/1000 = local airport BP (uncorrected)

BUT I always get this stuff mixed up.

Chuck Wilburn · « **Reply #60 on:** December 11, 2007, 06:07:29 PM »

You get the same # either way.

whtrthanu · « **Reply #61 on:** December 11, 2007, 06:25:12 PM »

see chuck...........its all your fault!!!!!!

8secCHEVELLE · « **Reply #62 on:** December 11, 2007, 09:41:30 PM »

Great thread. lots of info. Thanks guys

sidebusa · « **Reply #63 on:** December 12, 2007, 06:56:37 AM »

I have said it once and I will say it again. The dyno is a tuning tool, the numbers don't mean a thing it is used to maximize the engine tune. My interest is to get fuel air mixture in safe ranges. There are to many variables to take into account. My Busa made less HP than some others but I ran 1/10 to 2/10's faster at the track. Use dyno to tune and track to see results.

Chuck Wilburn · « **Reply #64 on:** December 12, 2007, 07:06:48 AM »

Quote from: whtrthanu on December 11, 2007, 06:25:12 PM

see chuck...........its all your fault!!!!!!

LOL- not the first time I've heard that!

mountainmotor · « **Reply #65 on:** December 16, 2007, 05:35:51 PM »

A question on topic of dyno's .

What would happen if a much heavier drum were to be used " built drum" and ran on a Dynojet 150 with later software ?

If the weather station was correct , would this tend to make for more hp/tq shown than a DJ150 with stock drum ?

bhartley · « **Reply #66 on:** December 19, 2007, 08:36:51 AM »

My bike has been on 4 different dyno's,
Schnitz,Brock's,A portable dyno in Kokomo Indiana, and on Spaz's Dyno in Indy when he was here and in Iowa when I was there and in rockingham when we were there. All runs were within 1.5 to 2 horsepower.
2 dyno's in Indiana. 1 in Ohio. 1 in Iowa and 1 in Rockingham NC.
Guess all those dyno's are pretty close to eack other.

B.

spdingtkts · « **Reply #67 on:** December 19, 2007, 03:14:23 PM »

I built a 1397 for a guy a few years back.

Ported head, bored throttle bodies, Web cams, APE springs & pins, modified JE pistons, Carillo rods, lightened crank, small airbox mod w/ BMC filter, Ti Force pipe, PC2.

It made like 218 hp with some mapping, could have used more time on dyno but the owner cheaped out.

The owner was all bent out of shape because he felt he spent a lot of money and got ripped off because he heard about all the 230 hp 1397's.

TRNorBRN6001 · « **Reply #68 on:** December 22, 2007, 01:19:04 AM »

Good thread, Moral of the story: A Happy Dyno keeps Everyone Happy!

Competition CNC · « **Reply #69 on:** December 22, 2007, 06:35:24 AM »

If it makes anyone feel any better, engine dynos also vary a few %. There no different. As far as pumping up a dyno number to wow the customer? Well our drag and circle track customers (95% of our business) judge their engine by the success they have at the race AND how many races they get before there is a problem with the engine and or power starts to fall off.

I have had my 1375 zx12r on 4 Dynojet dynos and they all read within 5 hp and 3 of them were DJ 150's.
I've had my cars on 2 different chassis dynos and they varied by several hp as well.
We run engines on our $80,000 DTS engine dyno that have come right off of a "friends" Superflow 901 engine dyno and they have varied by several HP as well.

Like several people have said, it’s a tool. The number it gives you is only one piece of the pie. The direction that number moves while tuning is more important. BMEP, BSFC are more important than the measured torque output.
BMEP and BSFC they tell you the efficiency of the engine and if you’re engine will finish the race with the allotted fuel.

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Author Topic: Manipulated Dyno #s- I'm Sick Of It! Video Inside (Read 16324 times) Tweet