Dyno sheets and discussion for UK Rotaries!

[sadgoth]

see Max, you\'ve started the old pub talk again :rollin

[maximtaylor]

It needed reviving! There are loads of cars out there that haven\'t posted figures recently, but have been on dyno\'s!

Plus I know Fish loves the banter, and Glenn has lots of free time to update the tables He\'ll be getting up about now.

[88GT-R]

Hi Max,
Any reason why the pull was in third?

John

[gsb876]

I think their particular dyno can\'t handle speeds in 4th gear???

[maximtaylor]

Gear selection makes negligable difference to the power reading.

On the dyno dynamics rollers, \'ideal\' roller speed is up to around 100mph, hence 3rd gear.

Although 3rd gear generates more torque to the rollers than 4th, the computer knows the roller speed (which is obviously lower on a 3rd gear pull. Also, the computer controls the ramp rate, which means that a pull in 3rd takes as long as a pull in 4th.

The only variable that differs is resistance/losses through the transmission and tyres to the rollers. The difference between 3rd and 4th gear is negligable, 3 or 4 hp, if that!

I wanted to check the theory for my own reassurance, so I have checked this with several cars now, and the graphs were near identical, within 2 hp in all cases.

This means that our \'pub talk\' figures can\'t be fudged with different tyre and axle ratio combinations

Max

[88GT-R]

Cheers.

John

[Smifta]

I have my \'old\' figures in that table. A few months ago I got Geff to slam in some 1300 secondaries and remap my Apexi. This was when he was mapping at CPL. Geff managed to get 306 rwhp at 14psi. This is a completely stock motor with seq. twins.

About a month later I went back to get a new clutch!!! LOL

I wonder if a slipping clutch made too much difference to the figures and mapping ?!?! hmmm......

Alex.

[Sean]

Had mine on the rollers last week ........... 285bhp ......... somethings wrong:(

Still got a higher figure than a porshe turbo and MR2 turbo though;)

[Warthog]

Down at Geffs yesterday. MAX did the Dyno ,TOPMAN. Full report on the FDUK Forum. 301.8 rwbh @ 0.95 bar very healthy map on the AF\'s etc.:cool

[jonyb]

Originally posted by Warthog
Down at Geffs yesterday. MAX did the Dyno ,TOPMAN. Full report on the FDUK Forum. 301.8 rwbh @ 0.95 bar very healthy map on the AF\'s etc.:cool

Good stuff, had mine done by Max yesterday too, although was stuck in an office so could,nt make it, maybe catch up some time as your not far away:)

[grinder]

Originally posted by Sean
Had mine on the rollers last week ........... 285bhp ......... somethings wrong:(

Still got a higher figure than a porshe turbo and MR2 turbo though;)

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

[bnaellis]

Originally posted by jonyb
Good stuff, had mine done by Max yesterday too, although was stuck in an office so could,nt make it, maybe catch up some time as your not far away:)

How much power mate? how much boost you running ? I bet its sickenly quick??

rgds

[jonyb]

Long story with mine,on its 2nd rebuild in 2000 miles.
Went pop on the rollers due to  injector problem last time, Geffs been good with the fix and helped in other area\'s so no complaints from me.

330 rwhp at .8 bar yesterday

On a T04R with loads of extra\'s, ill put a list at some point but last was a APEXI pfc and 1600 secondery\'s.
 
Keeping the boost down until water injection (dont want any more unplanned probs), which will be a couple of weeks. To be honist not really chasing hp now, just want to get as fast as i can now in set up and launch.

Just want to get in and drive, and yes it feels...fast, times will tell.  

[bnaellis]

ouch sounds expensive. Hopefully the worst is nehind you now and you can enjoy some nice trouble free mototring. All the best mate.

rgds

Originally posted by jonyb
Long story with mine,on its 2nd rebuild in 2000 miles.
Went pop on the rollers due to  injector problem last time, Geffs been good with the fix and helped in other area\'s so no complaints from me.

330 rwhp at .8 bar yesterday

On a T04R with loads of extra\'s, ill put a list at some point but last was a APEXI pfc and 1600 secondery\'s.
 
Keeping the boost down until water injection (dont want any more unplanned probs), which will be a couple of weeks. To be honist not really chasing hp now, just want to get as fast as i can now in set up and launch.

Just want to get in and drive, and yes it feels...fast, times will tell.  

[Warthog]

Engine mods are--- HURLEY Street ported new engine  run-in 2000 miles on the engine. Stock Twins. HKS Exhaust with FEED de-cat box. HKS induction kit. APEXI + Commander. Bosh uprated fuel pump. 1300 secondary injectors. GREDDY Pulley kit ( air pump removed ). PWR uprated Rad. PWR Charge Cooler kit. Plugs 10\'s and 11\'s. Magnecor 10mm ignition leads. GREDDY boost controler. BLITZ Turbo Timer.
   301.8 rwbh @ 0.95 bar. 362.2 @ the fly. Solid AF Map. 85% fuel use. The AF map is that good i can leave it on high boost setting all the time as long as i am running Shell in Optimax ( used to tune ) in the tank. I\'m not going to, but it\'s nice to have that confidence in the back of your mind.
  Will post scans when my own PC is back from the shop, hard drive died.:cool