FD:OC Dyno Day Results and Comparisons (04 Nov 18)

[jdmr_neil]

That would be great. Bring both on the same day because unfortunately you can't count on the fact that it is the same Dyno for it to spit out the same results on a different day. This is why this particular comparison among all of these cars is so useful, and let's be honest it is also really rare to have this luxury.

This was the biggest benefit to the day imo. Most of you who know me know i don't have a lot of time for dyno numbers as they can easily be manipulated. Even just factors like weather, car temps or even a different operator doing things his way.

Our fdoc day was a great back to back reference since all of our cars were heat soaked, all were ran within minutes of each other and by the same operator. The details are all there in the graphs not just topline figures. I've no doubt any one of us dynoed locally tomorrow would make a hugely different figure. That was the biggest benefit to our day imo

That and plenty of tea, biscuits and banter. Was really great to meet everyone.

Tbh the drive down and back was a breeze too being a Sunday. About 4hrs down clear all the way. 3hrs 20 coming home obviously chapping on a bit. Left home at 7am back in at 6pm. Job done!

 

[cib24]

The torque curve is interesting. Yours seems about 100 rpm ahead of mine in the initial steep climb, and then continues to build at a slower rate whereas mine goes completely flat. Both of your lines follow a similar shape to Martin's 9174 but with lower headline numbers

Yes, but the EFRs should have a table top torque curve anyway if boost is under control. All of the Turblown dynos show this to be the case. The only time you get a wavy result is when your wastegate isn't doing its job properly. Martin's car was not making 1.3 bar until way up in the rev range because of the restriction, hence the rising torque curve. Had he been able to make 1.3 when he wanted to then the curve would have been a table top like yours.

 

[cib24]

BY THE WAY, IF I LISTED YOUR MODS INCORRECTLY OR I AM MISSING SOMETHING IN THE FIRST POST PLEASE LET ME KNOW.

 

[brellis]

Good stuff guys. Is this flywheel or rear wheel horse power?

 

[cib24]

Good stuff guys. Is this flywheel or rear wheel horse power?

Flywheel. Assumed 15% drivetrain loss.

 

[Robbo80]

For comparison, my spec is same as tougemonsters except mines a Bridgeport instead of a streetport. Turbonetics t72 @ 1 bar

 

[cib24]

For comparison, my spec is same as tougemonsters except mines a Bridgeport instead of a streetport. Turbonetics t72 @ 1 bar
View attachment 9073

Interesting. It looks like the torque curve or speed setup is off on that dyno but in any case the way the power arrives looks similar to the other T72. I know it's an "industrial" turbo not known for quick spooling but if you could run more boost (say 1.3 bar or more) and free up that exhaust a bit I be you could get this T72 on both cars to spool possibly 500 RPM quicker. Once it is on boost it makes great power but it takes a while to get there.

 

[Robbo80]

Interesting. It looks like the torque curve or speed setup is off on that dyno but in any case the way the power arrives looks similar to the other T72. I know it's an "industrial" turbo not known for quick spooling but if you could run more boost (say 1.3 bar or more) and free up that exhaust a bit I be you could get this T72 on both cars to spool possibly 500 RPM quicker. Once it is on boost it makes great power but it takes a while to get there.

Yeah I plan on upping the boost sometime soon

 

[jdmr_neil]

For comparison, my spec is same as tougemonsters except mines a Bridgeport instead of a streetport. Turbonetics t72 @ 1 bar
View attachment 9073

Now that's like a great set up for Santa pod , turbo looks like it pull like a train once going.

 

[Blitzboy]

Very good work here Roy , it's shame we can't make everyone run the same boost pressure then we can compare turbo efficiency, porting more exactly also maybe next time have the wideband probe used to see AFR trace , therefore showing how important fuel/air mix makes a massive difference in power lost or gained

 

[Robbo80]

Now that's like a great set up for Santa pod , turbo looks like it pull like a train once going.

It certainly does pull well once going. The problem is I'm wanting to use it more on track than the drag strip

 

[cib24]

Very good work here Roy , it's shame we can't make everyone run the same boost pressure then we can compare turbo efficiency, porting more exactly also maybe next time have the wideband probe used to see AFR trace , therefore showing how important fuel/air mix makes a massive difference in power lost or gained

Hi Marco, thanks for coming to the event. It was great to meet you but at the next one I hope to have more time to chat.

Completely agree with you. In an ideal world we all modify the boost pressure on our PFCs for the same boost levels and compare, but that is unlikely to happen.

AFR bungs would have been a good idea but I guess Stu, Jay and Sam didn't want to introduce that just in case people start seeing something and wanting to tweak this and that on the dyno - which would have made it hard to get all 16 cars on and off the rollers on the day.

Maybe next year we can schedule a day at Surrey Rolling Road which is your local?

 

[jdmr_neil]

Very good work here Roy , it's shame we can't make everyone run the same boost pressure then we can compare turbo efficiency, porting more exactly also maybe next time have the wideband probe used to see AFR trace , therefore showing how important fuel/air mix makes a massive difference in power lost or gained

Even just a boost and afr trace would have been great.

 

[jdmr_neil]

It certainly does pull well once going. The problem is I'm wanting to use it more on track than the drag strip

For some tracks it will still work really well along as you can keep it over 4k+. Is more the tighter turns and long sweepers which could dip you out of the power.

All about just learning to keep it on boost i reckon, be rosy

 

[Robbo80]

For some tracks it will still work really well along as you can keep it over 4k+. Is more the tighter turns and long sweepers which could dip you out of the power.

All about just learning to keep it on boost i reckon, be rosy

Yeah the hairpin at croft is where I struggled bit other than that it was fine

 

[jdmr_neil]

I find the long sweeping right hander at clairveaux before the chicane the trickiest to get boost down. This is mostly because of the surface change post chicane unsettles the car viciously

 

[Blitzboy]

Very good work here Roy , it's shame we can't make everyone run the same boost pressure then we can compare turbo efficiency, porting more exactly also maybe next time have the wideband probe used to see AFR trace , therefore showing how important fuel/air mix makes a massive difference in power lost or gained

Just t

Hi Marco, thanks for coming to the event. It was great to meet you but at the next one I hope to have more time to chat.

Completely agree with you. In an ideal world we all modify the boost pressure on our PFCs for the same boost levels and compare, but that is unlikely to happen.

AFR bungs would have been a good idea but I guess Stu, Jay and Sam didn't want to introduce that just in case people start seeing something and wanting to tweak this and that on the dyno - which would have made it hard to get all 16 cars on and off the rollers on the day.

Maybe next year we can schedule a day at Surrey Rolling Road which is your local?

Yes sure that wouldn't be a problem to organise a southern shootout day , Mark the Dyno operator will use the AFR probe for safety and will abort a run if he can see it go mega lean , they normally can get through 20 cars easily in a morning when they have shootout mornings for other car clubs. We can get quite a few FDs from the south coast to come , my drag FD should be ready by then as well

 

[Francob]

@Martin17 - which turbine housing with your EFR9174?

 

[Mike]

Damn