nb8b power output

[NitroDann]

Thats good.

Get cams and enjoy 100rwkw or more.

Dann

[Hjt]

nice output, should be happy with that! Any further plans down the line? Was that on the Mania dyno (assuming because of Adaptronic)?

[Regie]

My 8b put out 88rwkw on manias dyno with just a ddm intake

[rascal]

My 8b put out 88rwkw on manias dyno with just a ddm intake

So that would be 80kw on any other dyno....

[hks_kansei]

My NB8A dyno'd 79.9kw at RE Customs Dyo Dynamics dyno.
All I had done was put the RSR muffler on, stock eveything else.

Mazda's specs say that the NB8A was 106kw and the 8B was 112kw (so 6kw more)
(Granted, they're engine numbers, not at the wheels)


If we assume say 25% driveline loss (an estimate on my behalf)
That would mean a stock NB8B should be ~84rwkw (112kw x 75%)


In that case, a 4kw gain isn't huge (it's good, don't get me wrong) but it's not that much for intake, exhaust, highflow cat, and a tune.

I would have thought 4kw was achievable with just a tune on a stock engine.
OR
The intake/exhaust/cat combo on a stock ECU


Maybe the more techo guys can comment? My reasoning may be wrong above.

[Apu]

I'll dig it out if I have time but I've read that engines coming off a production line can vary by 10% in output...so those basic mods could just bring a bum engine up to "spec".

[Hellmun]

I'd be happy with that, as with extractors, 2.25" exhaust, intake and an ECU tune my NB8B only made 90kw atw on the mania dyno (though mine was done in the wrong gear as I doubt my car would make 290nm torque in a true 1:1 gear). Cams aren't an option on SVT heads unfortunately, only cams of known existance for them are the maruha's and no-one appears to have gained anything from using them. If you have a look at the dyno sheet my car was still increasing in power linearly up to the rev limiter too so it's definitely flowing decently with stock cams already. Another possible problem is the alleged resonance issues in the cams of the SVT motor car past 7800rpm which have come up on miata turbo a few times. So upping the rev limit may not be a safe option if you get to a track....might be fine on the street though.

[pcmx5]

[quote="hks_kansei"]Mazda's specs say that the NB8A was 106kw and the 8B was 112kw (so 6kw more)
(Granted, they're engine numbers, not at the wheels)


If we assume say 25% driveline loss (an estimate on my behalf)
That would mean a stock NB8B should be ~84rwkw (112kw x 75%e]

Figures from the Mx5 Vic Club days suggest closer to 30% loss;There is also some doubt if the 8B ever made the claimed advantage over the 8A (remember they had to refund customers in the US because it didn't)and that is also supported by the club figures.

Most i have seen are around 72-76 RWKW on dyno dynamics standard.

FYI Chris h's Nb8B with a steel cat and T&C system made 86RWKW Dyno Dynamics and we just had an NA8A which made 73 standard(easily the best i have seen) and over 78 with cat and exhaust.

Dyno's are best used before and after to measure improvement and comparing results one to the other is not always useful.

88RWKW is a fun MX just enjoy it and good luck,

peter.

[Regie]

My 8b put out 88rwkw on manias dyno with just a ddm intake

So that would be 80kw on any other dyno....

haha who knows... cars been sold now, must see what the NC does

if i find the printout ill throw it up

[bootz]

Mazda's specs say that the NB8A was 106kw and the 8B was 112kw (so 6kw more)
(Granted, they're engine numbers, not at the wheels)


If we assume say 25% driveline loss (an estimate on my behalf)
That would mean a stock NB8B should be ~84rwkw (112kw x 75%e]

Figures from the Mx5 Vic Club days suggest closer to 30% loss;There is also some doubt if the 8B ever made the claimed advantage over the 8A (remember they had to refund customers in the US because it didn't)and that is also supported by the club figures.

Most i have seen are around 72-76 RWKW on dyno dynamics standard.

FYI Chris h's Nb8B with a steel cat and T&C system made 86RWKW Dyno Dynamics and we just had an NA8A which made 73 standard(easily the best i have seen) and over 78 with cat and exhaust.

Dyno's are best used before and after to measure improvement and comparing results one to the other is not always useful.

88RWKW is a fun MX just enjoy it and good luck,

peter.

I agree a nice figure but expensive to attain. Pricey ECU, full exhaust and intake <15kw.

[NitroDann]

Megasquirt is 600, exhaust a few hundred, intake is 100.

Dann

[93_Clubman]

There is also some doubt if the 8B ever made the claimed advantage over the 8A (remember they had to refund customers in the US because it didn't) and that is also supported by the club figures.

Indeed, & NB8C & NB8D testing & numbers were revised.

[sailaholic]

I thought that was to do with the USA sales stuff getting the jdm figures by accident?

Sent from my GT-I9100 using Tapatalk

[93_Clubman]

I thought that was to do with the USA sales stuff getting the jdm figures by accident?

Based my response on following:

According to Redbook, however, the series 3 and 4 are slightly down on power, from 113kw in the series 2, to 107kw in the series 3 and 4. Torque figures reflect a similar change, down from 181 to 168 in the newer cars.

If that's correct, is there a reason they wound back the power for the series 3 and 4?

Yes, the power rating was downgraded, due to emissions complaince retuning.

Numerous Club dyno days proved there was no difference in rwkw between the two engines. Mazda was forced to change it's method of testing to comply with the European emission standard.

[Matty]

... and we just had an NA8A which made 73 standard(easily the best i have seen) ...

Last dyno day I went to (2008 @ Caulfield Jag) that's what my standard NB8A did, as did another on the same day.

Dyno's are best used before and after to measure improvement and comparing results one to the other is not always useful.

^ THIS.