Wellington Dyno Day, Saturday 18th August

[Gaz007]

Dyno'd my car on Manfield Track, passed two 700 hp muscle cars, the yellow one spun off on the first corner and the red one was so busy wheel spinning and trying to get traction at the hairpin, I popped up the inside and drove away never saw it again

[ClanFever]

What a fun day! Cannot wait to do it again.

Shaun with the ored sw20 was already being hooked in when I arrived at 9am, he ended up with 173BHP @ Wheels (191 Flywheel)
Pierre was next, unfortunately the Merc had issues with the studs not attached the dynapack properly. It was unsafe to dyno it.
Colin then pushed his white aw11 in front of Brian (because his car was already warm ) - 85KW @ Flywheel
Brian got 132KW @ Flywheel in his red sw20
Mike got 75KW @ Flywheel (68K Wheel) in the yellow aw11
Callum with the r34 got a massive 195KW @ Flywheel
Philippe with the r33 got to 4800rpm 110KW @ Flywheel before some ECU issues threw some curveballs - it did hit a random peak of 130KW but no where near it's potential
Jonny in the Camaro got a smashing 288BHP @ Flywheel - the only car of the day to hurt my ears
I then got an absolutely out of this world 80BHP @ Flywheel in my carib
After that a couple more guys in an Evo and Silvia were up next - we mr2 guys went down to my lockup after my carib however as the day was getting short.

All in all a good day!

[Mrman]

Was a great day thanks for putting it all together olaf. I was extatic to find my car is running well after the swap so time to look into power mods once the chassis mods are done. I have some videos of a few cars if anyone wants them pm me.

[ClanFever]

If you guys have your dyno sheets, if you look for the "TCF" (torque correction factor) number, this can help you work out wheel power. TCF 1.0 is wheel horse power. TCF 1.1 or 1.2 etc is adding 10% or 20% on to get flywheel power.

Example, 100HP with TCF 1.0 is 100HP @ Wheels, Flywheel power would be roughly 110-120 (depends on what drive train loss it's getting)
110HP with TCF 1.1 is 110HP @ Flywheel, with a 10% mark up, wheel power would be 100HP

KW is 3/4 the amount of HP, 100HP is 75KW

I got the explanation off a friend on facebook, he says "Tcf is torque correction factor. So that dyno sheet with a 1.1 is a 10% correction as an estimate for drivetrain losses.

The dynapack shows either crank shaft torque or axle torque axle torque is just crank torque x diff ratio as shown on the dyno sheet.

That's not a bad result on the bigger pods (more inertia to spin up results in slighly lower figures vs the smaller pods)"

And "Front wheel drives have less drive train loss.
An off the showroom floor LS auto commodore needs a tcf of 1.2 to match the claimed factory output."

[rocco26]

Thanks Olaf, great day .I will be getting in touch with the boys to do some tweaking.

[WgtnMR2]

Sounds like a great day guys.

Have had Justin, Troy and ray working on my MR2 for the last two weeks, making a few adjustments. They found a couple of major problems from the sensors reporting back to the ECU and that it was running far too rich.

Hopefully collecting today at lunchtime, last report was 218 kW/300bhp at the wheels @16psi. 215s on the rear might be a bit on the narrow side, even running re03s.

I've been really impressed with the knowledge of the guys at TMS, would highly recommend.

[GDII]

Slap on some 245s.

That's a good power level to get to. Quite a bit for a small car.

[Supercharged]

Well that was an interesting read.

Re the AW11's.

75 - 85kW at the flywheels means they are only 90-100 BHP at the rear wheels? Is that right?

[*84vvt]

Well that was an interesting read.

Re the AW11's.

75 - 85kW at the flywheels means they are only 90-100 BHP at the rear wheels? Is that right?

75 Kw = Silver top bottom with a 16V head
85 Kw silver top bottom Blacktop 20v head
Last time the 20v was on the dyno it had 98Kw
Iv lost13Kw in the last 5 years
Need to do a compression test to see if the engine is tired.
Its still quicker then a Supercharger

[ClanFever]

Sounds like a great day guys.

Have had Justin, Troy and ray working on my MR2 for the last two weeks, making a few adjustments. They found a couple of major problems from the sensors reporting back to the ECU and that it was running far too rich.

Hopefully collecting today at lunchtime, last report was 218 kW/300bhp at the wheels @16psi. 215s on the rear might be a bit on the narrow side, even running re03s.

I've been really impressed with the knowledge of the guys at TMS, would highly recommend.

Ah yes, it was your car that was a backdrop to the days events. Would be good to see you on a run in the future!

[Supercharged]

Well that was an interesting read.

Re the AW11's.

75 - 85kW at the flywheels means they are only 90-100 BHP at the rear wheels? Is that right?

75 Kw = Silver top bottom with a 16V head
85 Kw silver top bottom Blacktop 20v head
Last time the 20v was on the dyno it had 98Kw
Iv lost13Kw in the last 5 years
Need to do a compression test to see if the engine is tired.
Its still quicker then a Supercharger

Hi Colin,

Any way you cut it 85kW at the flywheel is a disappointing result.

A modern day Toyota Corolla shopping basket is 103kW at the flywheel. Grandma has more grunt than you do – though obviously doesn’t mean she’s faster.

I do recommend you get a compression check done.

I did have a similar disappointment.

A few years back my Supercharger was dyno’d in the Hutt Valley and produced 128BHP (95kW) at the rear wheels. A good result considering the engine is 30 years old and the original factory specification was 143BHP at the flywheel.

When the team at TMS (same place you’ve just been tested) dyno’d it more recently the result showed only 100BHP (75kW) at the rear wheels.

I immediately thought my engine was tired but a compression check said otherwise – even and decently high compression across all cylinders.

I therefore wonder whether different dyno’s produce different results and recommend when working on cars to use the same dyno for comparison purposes.

[GDII]

All dynos read different. And different conditions make different things happen. Sure we all want to chase that peak power number but a dyno in my eyes is used for tuning and checking the engine.

My engine ran 100hp at the wheels from a GEN2 3SGE however what I saw was massive amounts of torque all the way through there range. Sure peak power was down but over 200,000km and over 20 years what would you expect. And Toyota dyno at the flywheel with engine dynos, not wheel or hub dynos.

Colins car sure doesn't feel slow, it's faster than mine in all conditions so it could be worse.

[*84vvt]

Iv had my car on 3 diffrent dyna pack dynos over the years
Stock 16v
20v Blacktop
20v black top with performance exhaust (2 diffrent mufflers )
Shred and STM were with in 1 Kw of each other..
As one would expect, I was not expecting such a bit drop on the last dyno ,Saturday .
as pointed out they are a very good tuning tool. Power reading might not be the same or what you expect
Has been pointed out that there is a differences between Big Hub dyno and small hubs
Which ones have I been on? and what did we use on Saturday ?

[Mrman]

Iv had my car on 3 diffrent dyna pack dynos over the years
Stock 16v
20v Blacktop
20v black top with performance exhaust (2 diffrent mufflers )
Shred and STM were with in 1 Kw of each other..
As one would expect, I was not expecting such a bit drop on the last dyno ,Saturday .
as pointed out they are a very good tuning tool. Power reading might not be the same or what you expect
Has been pointed out that there is a differences between Big Hub dyno and small hubs
Which ones have I been on? and what did we use on Saturday ?

Saturday was big hub packs

[*84vvt]

Iv had my car on 3 diffrent dyna pack dynos over the years
Stock 16v
20v Blacktop
20v black top with performance exhaust (2 diffrent mufflers )
Shred and STM were with in 1 Kw of each other..
As one would expect, I was not expecting such a bit drop on the last dyno ,Saturday .
as pointed out they are a very good tuning tool. Power reading might not be the same or what you expect
Has been pointed out that there is a differences between Big Hub dyno and small hubs
Which ones have I been on? and what did we use on Saturday ?

Saturday was big hub packs

So are both pares of dynos the same At TMS or are the front ones the smaller of the dyno hubs ?