bottom line is they are both very similar, and are both gonna do the same thing, make your bike breathe better.
one may make a few more hp than another depending on the other things you do with your bike, thats for you to discern by reading up on them.

i went with the Motobox because it is fabricated by one of our own forum guys, it was the first, his workmanship is fantastic, and the thing just works.

CPR makes more power than the MH box and is cheaper new. If you find a used MH box for less and you don't have to make the absolute most power, go for it.

proof needed , you cant shout that kind of thing without evidence , back it up

The cpr is not enought solid..

Be carreful !

Irrespective of +/- a bhp or 2, 300 quid for a scuplted piece of bike porn from Mothooligan felt like you were robbing the guy. I would imagine his actual profit on the job is minimal.

200 plus quid for a bit of plastic and foam to CPR seems extortionate. To me, it feels like they are robbing you. I would imagine their actual profit is many hundred times their cost to produce.

Well I will be able to tell you shortly which airbox (the cpr or motobox) is better as I am about to test one on the dyno to make sure that the dvs will work with that airbox. After doing the dyno testing with the motobox last week it will be a good comparison. .. same bike, mods and dyno within a couple of weeks from each other

All in good humour folks.

I think Ceric has seen results of various airboxes on projex dyno as big Dave tried every combination of everything known to man.
I don't want to post his conclusions as I'm not 100% sure I remember the conversation correctly.

I bet there's more variance from engine to engine than airboxes. I think they're all there or there abouts.

There's only so much air you can give the motor. They all give more than enough. I like the cpr because it's simple, light , and they're a brilliant company to deal with.

I'll tell ya what does give gains though. Getting more cold air rammed into the Airbox area. Proved this on the dyno last week. It's worth noting though I wasn't working to get a big top end 100% throttle run. It was all part throttle map and roll ons we worked on. That might be something to look at for the guys after big pub figures.

Tuning only fixes the air fuel ratio... It's the hardware that gives the gains.

But what a lot of people do no appreciate about dyno tuning is that you can tune for all rev ranges at a fair few throttle percentages.. so although you may not get that much more hp overall it's the gains everywhere else that all add up

I agree with MrZ!

Tune ECU was taking ages so we just used the PC3.

It's not exactly 100% true coz you do need the bike to make good power. But when it's getting to the point its 2/3/4bhp difference (for my situation anyway) its more important how the motor delivers its power at 60/70/80% throttle openings from mid revs.

Like i had last season, there's no point in having a motor that makes ok power but is as flat as a witches tit at 50% gas at 6-7k rpm (i'm nit picking here). Then the power comes in with a hit and upsets the tyre when its at full lean and thats where it needs a smooth delivery. My 80% map is almost the same as the 100% now!

That the rough plan mate. To do similar to what Gogo did and seal off the base plate and make some ducts to get more air forced in. Like you say, it's not ram air. Just making sure it gets a good strong supply of cool air. The more air we got in the leaner it ran. Added some fuel and it made more power.

I've opened up the side panels and made some crude ducts to divet air in. I wasnt sure it would work with the big fat 05 mask but the air does seem to run up the sides of it and can be diverted in. All really rough though. Tried to simualte it as real as possible by keeping the fans blowing head on to it. The dyno guy wanted to do a run with the fan diverted right into the side panels but i wouldnt let him as it was a fake run. The bike would never be able to suck in that amout of air unless it had two big elephants ears hanging out the side panels so it was pointless. It would be easy to do it and print a 135bhp+ dyno run though for the pub.

Ive got a strict class limit of 130bhp max so cant go too crazy. Thats why i'm not massively concered with headline full throttle runs.

Like i said in my last website update though. The bike might be bob on now with all the work i did i the offseason so i might not go ahead with this stuff.

Pretty happy with my CPR. When you recive the package in the mail it feels like you purchased an empty box.

Its simple, the quality is great, weighs very little, performs well (126hp with my yoshi's), Very quick to remove. Customer service was quick to reply to questions.

The no toil filter oil is nasty stuff to work with (use disposable gloves)