theotherphil

Just got myself a new toy....a Race Technology AP22 Performance meter. Just thought I'd share some figures from my MY95 UK Saloon with the following mods:

Revolution 3" DP and system
K&N panel Filter
Resonator box removed and replaced with cold air feed
MAF "grill" removed
MRT inlet plenum replacement pipe
Walbro pump and FSE reg
Fidanza 4.2KG flywheel and Scoobyclinic clutch
Apexi Power FC mapped by Andy F (remap due)
1 bar boost



Not too shabby I think. It should be getting remapped later this month as I have a new TMIC that should be arriving. We also encountered a few problems when the Apexi PFC was initially fitted....namely O2 sensor goosed, coil packs nearly goosed and the boost control solenoid not allowing over 1bar boost. The O2 sensor and coil packs have been replaced and the boost control solenoid is being replaced by an Apexi item. My christmas is going to be 9 days early this year

I'll post more data later when I've had a proper play.

Nezz10

nice results! Keep em comin

7 Foot

How much was the AP22?
Where from?
Are they reliable?

Nice results btw.

theotherphil

Hi there, I got the AP22 from the manufacturers site here. You can claim a 10% discount if you mention scoobynet.

Jiggerypokery

How would you get a peak power from the AP22? I mean maximum BHP not the maximum on a 0-60 run, I assume you'd have to do a 0-140+ in 4th gear?

Do the instructions tell you to measure your times on a flat surface? What happens if you start going down hill?
Thanks

theotherphil

As far as I am aware, it doesn't show a maximum BHP as such. It is mainly a unit to measure time and G-Forces.

The documentation says the unit is accurate to 2-3% out of the box but the error can be reduced to below 1% by setting the tilt factor to compensate for vehicle squat under acceleration. I have it set for 0.013 which is between "Sports cars with firm suspension" (0.011) and "normal road car" (0.015).

The BHP is worked out from rolling resistance, cda and vehicle mass. I have entered 1320KG and 0.33 cd but I have yet to down a coast down test to determine rolling resistance. The BHP figures shown above may be inaccurate but the timings are correct.

For accurate results, testing should be carried out on a flat straight road. If there is significant wind, test in the opposite direction and average the results.

I am sure the experts on here can elaborate more.

Andy.F

Also note the bhp readings are calculated at the wheels, not flywheel.

Andy

velohead66

So would it give you a 'best lap' if doing a track day ??

If not, any recommendations ??


Like the figures, btw.

Ninnybobs

Nice figures Phil.

Finding a suitable quiet road around Teesside to do the testing must have been a struggle.

I had to head out towards Stokesley for a flat quiet stretch.

Cheers

Martin (MY01 4.6secs 0-60mph)

theotherphil

Yeah, it sure is a struggle finding a suitable road. Luckily, not far from where I live there is about a 1/4 mile stretch of totally clear, totally straight road with no houses nearby. It runs parallel to a railway line and a public park (but has no entrances onto this road) so is perfect for 0-60's. Unfortunatley, I need something longer to do further testing

Andy.F

Bring the AP22 up when we do the remap Phil, you can use my, er, test track

Andy

theotherphil

Sounds like a plan...

Tommy_Lee

Decent results m8.If you can get over 1g on launch though that would be impressive

theotherphil

Well, Andy did the remap for me (cheers) and it is now boosting at 1.25 bar peak, dropping to 1.15 at the top end (I don't want my UK 5 speeder to die before I get a replacement). I have since fitted an Avo TMIC.

I tried to get a good 1/4mile time this morning but traffic and very wet roads have made it difficult. I was parked on the side of this road for about 10 mins waiting for traffic to clear so only managed to get one run in. I pulled away just as white van man came off the roundabout. I would have loved to have seen his face as my car fought for grip and then explosions came from the exhaust when changing gear.

Anyway, I was about 1/2sec off my best 0-60 judging by the saved results so I fully expect to improve my times once it dries up a bit. Whatever anybody tells you, even with 4wd it is quite easy to get the tires to light up in the wet

Results: 13.71 @ 103.8 and 0-100 in 12.49s (the power shown on the below results is @ wheels but the settings to calculate it havn't been set up yet so ignore it for now. I need to do a coast down test which will calculate losses through the drivetrain)

Baggers

I also have an AP22, they're really nice bits of kit. Many motoring mags use these to test cars and Race Technology often sell these 'used' units on ebay, they tend to go for about £100-£110. The newer units have some good analysis software available with them but this is also achievable through a bit of excel wizardry. You use hyperterminal and a supplied RS232 15 pin cable to hook up to a pc. They are accurate and do measure power at the wheels which takes out any fudge factors normally applied by a rolling road outfit.

Just for info, when fully calibrated for rolling resist / drag / squat etc my box standard MY99 shows 172 bhp at the wheels which equates to a 25% drivetrain loss.

You can also measure lateral g (wooohhahahahaha)

Ninnybobs

Nice One Phil,

Sort those 60' times out (should be around 1.7 - 1.8 secs) and you will be running in the 12's for quarter mile.

Keep up the good work.

Martin

jasonius

iTrader: (1)

How do these units know when you hit 60mph or any speed for that matter..?

Bangkok Matt

Hi Phil,

I'm back in England for a week in April. How exactly do they work and do you know where I can get one? Can I buy one and bring it back here or are they mail order only?

Any help greatly appreciated.

Very nice times BTW.

theotherphil

Matt, you can get them from Race Technology. For more info on how they work, see here.

theotherphil

Hi Martin...I know what you mean about that 60'. It is so difficult when using a private test track that has other traffic on it (as well as being pretty wet) to get good times. I actually had to dip the clutch again just off launch as it bogged down - then wheelspan like crazy so I am not surprised it was bad . I will be going out to play when it is quieter and drier

Bangkok Matt

Excellent, thank you.

theotherphil

Ok, got a decent start this time but backed off early.....roundabout looming, icy road and lack of bottle! As you can see, I'd hit 100 by 11.9s so should have had a higher terminal. (13.4 @ 98.9)


I'm going out to play later now the sun is out and the road is semi-dry.

Edit: I also did a coastdown test to calibrate the power figures. Seems it was allready set from the last time a played with it. So the power figures should be relatively accurate @ wheels. I dunno what my fw figures are but assuming a 25% power loss through the transmission it should be roughly 295bhp. Does this sound about right for the performance figures I am seeing?

Tommy_Lee

These are a great piece of kit.
I managed to get 5.9 to 80 in my 400bhp 4x4 cossie, unfortunately the private test track wont really allow the 1/4 mile to be done safely!

dingy

Are scoob's going backwards in performance these day's ?

Craig H's standard STI 5 was quicker than all the times posted with a little under 280bhp

chrisp

my motor ran 256@ wheels and 320@fly, also ran 250@wheels on another rolling road.

RAs seem to have less tranmission losses but if you use the same factor

320/256 =1.25

221x1.25 = 276bhp

chrisp

plug 1235kgs and 276bhp and 4wd into www.letstorquebhp.com and you get 0-100 in 12.02 and 0-60 in 4.47

MADRod

That time aint going to happen with 400 brake on a 4x4 no chance. This would mean a sub 8s 0-100 blieve me thats not on with less than 500
bhp. Dont kid yourself with these gismos , take it to Brunters & strap the Datron on.

dingy

chrisp flywheel figures from rr's are total bollox.....

rod
Jayb did a 3.9 0-60
craigh did 3.7 0-60 and a sub 9 too a 100 with 360bhp

Are you sure.

dingy

didn't the 22b that anders owned get 4.0 0-60 when it was standard. ?

chrisp

Yep prefer wheel hp both my runs on different road were within 6 or 7 bhp @ wheels

360bhp - was it bench dyno-ed ?