hi all

got the Busa MNR mapped a few days ago, made 177bhp on the crank and 146bhp on the wheels, i am plzed with results but i aint plzed with the oil leak comming from the starter gear clutch casing, nothing a new gasket wont sort, i hope

i ve still got emission problems, this failed my SVA, C0 % was 5.02, the dyno engineer managed to get that down to 2% but it is still over the 0.3% you are allowed

he suggest that i used a bigger CAT as the one i m using is 4.5" long by 3.5 wide

i have just ordered a new CAT that is 6" long and 4.5" wide so hopefully it should get me a pass second time round, might run both in tandom

what do you guys think ?

cheers

forgot to mention that i m not running a PAIR system

[Edited on 2/8/08 by finlay]

[Edited on 2/8/08 by finlay]

[Edited on 3/8/08 by finlay]

What fuel pressure are you running ?

Try dropping to 28psi.

Is a 30BHP loss acceptable from the crank backwards? seems a hell of alot to me but there again I have nothing to compare it to

Have you got a reverse box?

Jason

[Edited on 2/8/08 by Jason Fletcher]

no reverse box

i m running about 40 psi or 2.9 bar at idle

i havent tried manually cranking down the fuel pressure yet, but the dyno tech mapped it as low as possible before it started leaning out enough to cause damage, i am hoping the sva tester will let me play about with the fueling at my resit, i am going to call him just to make sure its ok, the dyno tech said he would come to sva to try some mapping onsite to try and get the emissions down

cheers

[Edited on 3/8/08 by finlay]

I may be wrong but you will probably need two maps. One for emissions and the other for the track.

my mates busa had the fuel pressure dropped manually when he arrived at sva. Then cranked it upafter he passed. Remeber 27 psi but may be wrong.

quote:

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Originally posted by sucksqueezebangblow
I may be wrong but you will probably need two maps. One for emissions and the other for the track.

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Hi Finlay

mine has black boxes on the cam cover which I think replace the pairs or might actually be the pairs device. Either way it's still connected.

I have been told that pairs will help the emissions.

Mine has a metal (not ceramic) cat of a 100 grade (whatever that means??) and once I figured out how my emissions tester worked I managed to get the emissions down to below what the SVA man will accept by just adjusting the fueling with the PC and leaving the fuel pressure alone.


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Hi Finlay,

Mine's not up and running yet but I have replaced the PAIRS with blanking plates. Marc tells me that he has got 'Busas through emissions without PAIRS but with a Power Commander, and a cat of course. But I believe you will need two maps one with the cat for emissions. One without the cat for power/torque delivery.

thanks for the replys

yea the PAIR system does help with emissions

i ve got my Power map running at the moment but the dyno tech has a emissions friendly map for me, he will also come with me to the SVA resit just incase he needs to alter it, which was very nice of him to do so, so hopefully i will get through 2nd time

cheers

Good luck Finlay, were right behind you! Well.......maybe a few months behind you......, or so....