Dyno sheets and discussion for UK Rotaries!

[Warthog]

JONY B-- Yes i was there when MAX did yours. What a 45% turbo line it just kept going up. That is one ANIMAL of a car. RESPECT.
    We will have to meet up when she is all done, send me a PM and we can sort out the details Mobile numbers etc.:wave

[Sean]

Originally posted by grinder
its not a bad figure - what was you hoping for ?? ( and if thats RWHP then you are looking at something like 330 at the fly )

what mods does it have again ??

and what boost it is running ??

Stu

That was 285 on the fly, Pip say\'s I need new plugs. He said it\'s suppossed to be 325ish

Engine mod\'s include:

Stainless Steel Janwa De-catted Exhaust
Twin HKS green airfilters
Apexi Power FC & Commander

And thats it for power mod\'s:(

[Warthog]

Can someone update the chart so we can all see where we are and what we need to do to improve. Thats if you want to play that game, but it is nice to see where your pride and joy sits in the rwbhp / fwbhp ranking. Ta.

[20B_boy]

The actual html job that Glenn started is an arse to edit. I\'m happy to do an excel-based .jpeg job and keep it up to date as and when people post...

Some agreement on how the various dyno outputs should be converted to flywheel hp needs to be reached I guess i.e. how else do you list power at the wheels, hubs or fly in order?

[cjr]

Can you put mine up please:D

[scooby_si]

Rich can you mail me the xls spreadsheet you\'ve done i was guna do one myself which looked like the html thing but easier to modify i like xls it;s all i fooking do at work anyway....http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/3/3_8_11v.gif\' border=0>
si@fduk.org best bet as hotmail is being arsey & my outlook deletes all attachments....
ta
Si

[Spotlamp]

Do you think you could post mine up please?

Made 317rwhp, made at RE:Worx on 25/02/05 and tuned by Geff.

Running stock twins with an engine built by Tim @ RX Motors (non-ported).

Cheers
H

[jonyb]

Well seems as were looking at figures, and i know ive got more , but made 323rwhp at the good old Reworx 13th Jan.
T04R .8bar.

tuned by Geff. Built by ??

thanks

Jon

[gsb876]

Not sure how my car got on the dyno sheet but the info\'s wrong dudes,

Car made 342.7 @ Fly @ 0.6bar boost.

Tuned by WGT supplied via Dragon, supporting a T78 not T76 turbo thanks:)

Gurj

[petemillis]

Most consistently reliable conversion factors I have found for a rear wheel drive are as follows.

RWHP +10hp to arrive at ATH HP then take into account 12% loss from fly to hubs by dividing by 0.88.

So, 250 rwhp + 10 hp  = 260 ath hp
      260/0.88 = 295 atf hp

Going the other way 295 atf hp - 12% = 260 ath hp
260 ath hp - 10 hp = 250 rwhp

[PETE SMITH]

Oooo, i\'m being knocked down the chart and even by a stock twinturbo!!
Better get some fresh Dyno fettling done by Max!!
Pete:eek:

[scooby_si]

how the heck are we doing this then as all the nobles figures are at the flywheel which when i asked was calculated from the -ve figures to calculate transmission losses or such like & basically thats only figure given which at first glance the figures so far are ATRW? I know it\'s all subjective & kinda hard to compare anyway just after some clarity on how the results need posting?http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/3/3_7_6.gif\' border=0>
Ta
Si

[Warthog]

Just a point on the chart, is it worth showing what  BAR or part thereof the BHP was attained at. I\'m sure it would be of interest to, if no one else, us lesser mortals who have not yet gone single. Is it possible or should i just be shot for asking stupid questions???:rollin

[petemillis]

How about 3 columns for horsepower:
1. ATF hp
2. ATH hp
3. RWHP
And if someone has indicated an ATF hp figure, then they need to show how this was derived from ATH or RWHP (unless of course the engine was out and put on an engine dyno).

I\'m guessing not many have tested on an engine dyno, so it might be an idea if everybody just quoted their RWHP or ATH hp (RWHP + 10), and then a single conversion factor for all readings to estimate ATF hp
i.e. assuming 12% trans loss from fly to hub, the estimated ATF hp would be: (RWHP + 10hp)/(1 - 0.12)        

The divider (1 - 0.12) is (1 - 12%) so assuming an ATF hp figure of 100 hp, subtracting 12% for trans loss gives 88 hp ATH. To add that loss onto the ATH figure you need to divide 88 hp by (1 - 12%), i.e 88hp/(1 - 0.12) = 88hp/0.88 = 100hp. I\'ve seen people adding 12% to 88hp in which case you only arrive at 98.6 ATF hp. at

[cjr]

funny statement I know. But surely the rwhp should be what is used. As this is what connects the car to the road(some times)!!