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Old 18-08-06, 11:51   #51
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Only reason I was pissed on the day was shaun goes 'john must be using a high ramp rate to get the numbers' I mean whats with that. He didnt look at it and so oh looks like something isnt working correctly be it you boost controller/ebc/something it was just that straight out.

I went back to john and we put the car on the dyno again and checked this exact thing, we used Shoot out 4F with its ramp rate of 150, then non shoot out mode with 150 rr, then non shoot out with ramp rate 100 all reading with in around 5 kw of each other.

If you have a look that will be good, but i dont actually think boost was logged, not to sure about AFRs.


edit
about ramp rates, 4 runs a rr of 100 where 4F runs rr of 150, in my understanding 150 lets the rollers accelerate more freely so there is less chance of wheel spin.

Last edited by SR910; 18-08-06 at 11:56.
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Old 18-08-06, 12:16   #52
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Its a silly question but was it up to operating temp?

May have still been running the water temp ign and fuel correction values.

Quote:
Originally Posted by SR910
edit
about ramp rates, 4 runs a rr of 100 where 4F runs rr of 150, in my understanding 150 lets the rollers accelerate more freely so there is less chance of wheel spin.
Thought it was something like that.
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Old 18-08-06, 12:21   #53
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Not sure but you could well be correct. wasnt running for all that long. if it went rich or pulled timing could make the top end all funny, plausable explanation.

Last edited by SR910; 18-08-06 at 12:24.
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Old 18-08-06, 12:45   #54
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Dyno days are pretty bodgy/dangerous when you consider the cars aren't really up to operating temp.. :S
.
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Old 18-08-06, 12:47   #55
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i think we need to organise some street dyno sessions* lol













*i do not condone street racing
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Old 18-08-06, 14:22   #56
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Quote:
Originally Posted by MONSTER
not a fan of that bluebird wagon darren?
I am actually, been watching the various things he has been doing for yrs.
The engine bay is killer, but yeah, that day it looked flat on the rollers, not
what i expected, i expected it to be like my car and mS-75, where they try to leap off and get up on the rollers, a sign of a strong torque curve.
But like i said whatever happened on the day happened , blacktop dynos rock , be good when we all get a track
cheers
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Old 18-08-06, 14:40   #57
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it did make 500 foot pound at AED engine dyno, whats that nearly 700 Nm, the land cruise motor probably makes close to if not over 1000 Nm (guess)
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Old 18-08-06, 14:44   #58
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I've got a majority of the dyno sheets from the dyno day.

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Old 18-08-06, 15:03   #59
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but is that accurate, my figure is from an actual engine dyno, to get that you would have to enter exact tyre diameters etc?
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Old 18-08-06, 15:25   #60
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lol.. nar its a rolling road figure all altered by tyre and gearing as you know :P

Interesting to see how far out it is from the real figure though..

I'd say Seans is up around 1000nm maybe a touch more considering the rev's it uses to make the power it does. Which is pretty insane from a stock donk. :P
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Old 18-08-06, 15:28   #61
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Torque?

Hey Darren, what is the torque numer on the graph actually repesenting? Is that the torque at the rollershaft?

I ask because without the RPM of the engine being logged the torque of the engine can't actually be calculated.

This is a graph from Wests dyno where the RPM trace was hooked up. The number is still 'funny' though as due to converter slip there is a torque multiplication effect happening, SERIOUSLY inflating the number.



When you've dynoed yours Darren, what percentage slip have you seen with the converter? If you havent actually measured it, if you've got a dyno sheet, diff ratio # and tyre dia. I can calc. I'm interested as I'm trying to work out if the converter slip I'm seeing on the dyno is normal or not.

Also, have you guys had any experience tuning with NOS?

Hey, SKY30, you got that boost control hooked up yet? Sorry I haven't got back to you-work has been a touch busy of late....

Last edited by MS-75; 18-08-06 at 15:34.
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Old 18-08-06, 17:57   #62
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now ur talkn... u guys know ur stuff hey... love reading this **** and learning
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Old 18-08-06, 18:19   #63
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what do you want to know about the gas? I just hooked up my direct port foggers and might get it tuned in a week or so, going for a 100 hp shot (pretty much smallest ones i can get)

going to have to probably knock 3-5 deg of timing off to compensate for the large increase of cylinder pressures at lower rpm (start injecting at just over 4000 some where and get the computer to cut it 300 rpm before limiter) dont run it to limiter or there will be some big bangs. As a rule i have seen generally 1 deg reduction for every 25 hp of gas.

With out a pressure guage and bottle warmer its almost useless, you want to tune it at around 950ish psi, sometimes you will connect the bottle (full) and see 700 psi so you must heat it to the same temp it was tuned at to get repetable results (obviostly).

Bottle Temp Bottle Pressure
(deg. Celsius) (PSI)



-34 167
-29 203
-23 240
-18 283
-12 335
-6 387
0 460
4 520
10 590
15 675
21 760
27 865
36 1069

Not sure if thats what you wanted to know/or what i said was too basic.

HTH

Last edited by SR910; 18-08-06 at 18:32.
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Old 18-08-06, 19:01   #64
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[QUOTE=SR910]Im not overly bothered, I only seen this thread because my friend told me about it, and the argument of hitech reading high is still going on, which in my opinion is a load of ****.

you able to tell me who has actually said that hi-tech's dyno gives high readings?
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Old 18-08-06, 19:23   #65
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[QUOTE=VLTurbsEx]
Quote:
Originally Posted by SR910
Im not overly bothered, I only seen this thread because my friend told me about it, and the argument of hitech reading high is still going on, which in my opinion is a load of ****.

you able to tell me who has actually said that hi-tech's dyno gives high readings?
just have a read through this thread.
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Old 19-08-06, 01:10   #66
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Quote:
Originally Posted by VLTurbsEx
you able to tell me who has actually said that hi-tech's dyno gives high readings?

why dont u start by reading the remarks of mrvlt and vltnitron.

in my opinion, boostworx reads higher than hi techs anyday. the amount of flattering rwkw figures ive seen come from boostworx.... geez. only ever seen stiff and fair readings from john. just my opinion tho, so to the boostworx lovers, we'll just agree to disagree. some of u guys are venturing deeper into a dynosheet than my knowledge goes, but i know enuf to recognise when rwkw and torque figures are on the money or not. when ive got some money to waste in a couple of months time, im going to book in some power runs in the same day, just to test the theory.....

Last edited by MONSTER; 19-08-06 at 01:28.
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Old 19-08-06, 01:46   #67
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Quote:
im going to book in some power runs in the same day, just to test the theory.....

i think thats the best thing same day dynos will tell all.
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Old 19-08-06, 01:48   #68
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well said gav... haha
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Old 19-08-06, 03:29   #69
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ok, lets leave it at that.

I'm not fussed who tunes my car, providing its safe, continues to return 10.6/100km's cruising around with the odd squirt and feels good to drive. Thats all the matters.

For my needs... I wouldn't ever bother with an autotronic/motec, simply overkill.
The PFC runs sequential injection, 6 coil drivers, knock sensor and o2 sensor utilization, cold/warm starts and drives like factory, awesome interpolation and awesome large injector control. There's no ecu that comes close to it when you consider the 'basic' features you need and that it can be picked up for under 1k new including hand controller.
Its the ecu of choice for the japs limping their 1200hp RB's around the streets.

Last edited by Cubes; 19-08-06 at 03:32.
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Old 19-08-06, 07:48   #70
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Quote:
Originally Posted by SR910

edit
about ramp rates, 4 runs a rr of 100 where 4F runs rr of 150, in my understanding 150 lets the rollers accelerate more freely so there is less chance of wheel spin.
When the rollers are running more freely, doesnt this cause a top end power spike making the power overshoot the mark where it should be??

My mate has shown me how this can happen when using the wrong ramp rate on his dyno.
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Old 19-08-06, 12:37   #71
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dont know, i havent seen that before, but i have used rr from 100 to 150 with the same results.

the only problem that could happen if you let the rollers spin to easily the car might not come on full boost (extreme example) and not make full power.
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Old 19-08-06, 22:18   #72
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The only reason i did is coz ur a smartarse!!
Wat flattering rwkw runs u seen frm shauns????
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Old 19-08-06, 22:22   #73
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who u talkin too alex?
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Old 19-08-06, 22:26   #74
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U mate
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Old 19-08-06, 22:28   #75
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so u dont actually believe that hi-tech's dyno reads higher? so u were just saying that to give me sh1t? ...... i think that would make u the smart@ss mate.
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