NB8B power at wheels..

[kula]

heya,

this week for my latest engine conversion idea im playing with the idea of a NB8B import engine..

VVT 113kw thingy..

with basic mods, what sort of power at the wheels are people getting?

thanks,

.m.

[Babalouie]

I think Jolt was getting 83rwkw with just the intake and catback...

[Bevan]

Anyone got a stock figure?

[Alf]

Anyone got a stock figure?

The (presumed) stock NB8Bs from the recent Melbourne and Perth Dyno days were measured at between 73 and 78 rwkW.

Cheers,
Alf

[mmx005]

when i first got my 98 it went on the dyno at bathurst after a long and semi spirited drive from the central coast on a 36deg day and did 68rwkw on 95 octane.

awhile after that run i did mania intake, xforce xtracters, ran them for a while then added a hi flo cat, 2.25 to the stainless smb muffler all from mania the day befor my next run and got 80.5rwkw on 98 octane.

hope it helps kula

[roddclarke]

Well mine with a Mania Intake got 76rwkw.. and with the extractors and exhaust as well got 86 on the same dyno.. and after the ECU and tune it now had 96rwkw..
i think Jolts has 97 or 98 now...

[jolt]

kula: NB8B import engine

kula: Note that the JDM BP-VE engines actually put out 118kW at the flywheel in standard form because of their higher 10.5:1 compression ratio versus the Aussie and US 10:1, presumably to take advantage of their higher octane fuel. I'm not sure if the extra compression is from running different pistons, but I suspect that would be the case.

And remember that the Aussie and US BP-VE's were only really ever putting out 107kW, the 113kW figure was total fiction and whilst Mazda Australia claimed the reduction in late 2002 was because of stricter emissions regulations, Mazda US admitted they simply got it wrong. A similar admission came again from Mazda US with the RX8.

So your import engine should get at least another 8rwkW on top of the figures quoted above.

Personally, I'd stay away from the BP-VE though because the S-VT creates more headaches than its worth. The only ECU's that can tune it are:
- Motec ($5,000) nobody has successfully done this so it will be expensive and you'll probably kill your engine in the process, that's what happened to the one person I have heard of who tried a Motec)
- SP Motorsports piggyback/interceptor/chip thing ($1,500) but I don't think these are really being sold anymore and again.
- Freedom ECU as used by Maruha Motors ($2,000) but tuning software is Japanese only.
- Hydra Nemesis ECU ($2,000) and if you can get one of these running properly, then that will make both of us very happy.

Note that each of the prices I've listed are my best recollection of the supply cost and exclude fitting and tuning except for the SP Motorsports piggyback/interceptor/chip.

You'd be better off spending your money on a built BP-ZE engine with higher compression (Flyin Miata 1995cc stroker kit with 11.5:1 pistons), clean up the head, Tomei cams and maybe even quad throttle bodies. You'll have a much wider variety of much cheaper ECU options if you stay away from the BP-VE with its S-VT.

I'm apparently getting 98rwkW on a Dyno Dynamics but I'm yet to get that independently confirmed. That's with the following power mod's:
- Hydra Nemesis ECU
- Maxim Works Extractors
- High Flow Cat
- 2.25\" stainless steel mid-pipe with resonator
- Trust Power Extreme II exhaust
- ARC Super Intake Chamber
- Apexi Power Intake pod filter
- Hondata Heatshield intake manifold gasket
- NGK Iridium spark plugs
- Magnecor ignition leads
- A couple of whirlygig style vortex generator things in the intake and one from Anniversary Racing Factory in the exhaust which surprisingly DO make a dyno proven difference. I gained 1.5rwkW from the two in the intake.

Rodd: Your power readings are from a Dynapack hub dyno aren't they?

Rod

[kula]

thanks for the big reply....


wow those voretx things sound interesting...
id love to test em out myself..

yeah.. a lot of options i guess..

[roddclarke]

[Rodd: Your power readings are from a Dynapack hub dyno aren't they?

yes they are all from the SP Motorsport Hub Dyno...

i havent been to any other dyno to compare and see what difference there are..
mainly cause i dont really car how much rwkw it actually has.. it feels faster and smother than standard.. so im happy
it was only on the dyno to be tuned.

but i would put it on one to see.. but not at $50 etc..

[SileNceR]

my NB8B is still stock and did 78.4rwkw on a DDD

[jolt]

That's a great result!!

Was the dyno in Shootout Mode? Where was the temperature sensor located?

thanks
Rod