H1 resurrection.

[RedexRobB]

How does it ride now with that can on?

[zimm]

its ace

tbh, i've known i was getting this for a couple of weeks, so the carbs were setup with it in mind.. and my guesswork has paid off, its nigh on perfect with the stock H1 needles, pipercross filter and #105 mains.

midrange is what's surprised me, there's more of it compared to the micron, but it holds on to the power at the topend better, which is what i was hoping for.

weirdy thing though .. the inlet to the can is bigger than the outlet, the whole thing tapers .. maybe why the midrange is as good as it is ? ..

tbh, its so nice to look at, and sounds so good with a nice sharp edge to the sound, that i'd happily live with it even if it caused a massive hole in the power delivery .. but it doesnt.

[jake]

ahh, so thats what they look like without the gravel rash, dented, bent back and more dents kinda look
shes a beauty

[zimm]

ahh, so thats what they look like without the gravel rash, dented, bent back and more dents kinda look
shes a beauty

sounds like both my micron systems ! lol

[jake]

what are the H1 needles Zimm? are they the 77 ones?
i had probs with mid richness on the last dyno, with dynojet needles, so looking to try a few standard ones

[zimm]

im using N77-C needles, there are also N77-0 needles which look very similar,(think they are longer) but i've not had good results with them, least not with an H airbox, seems to "choke up" a bit around 8k, then its hesitant when you get on the gas, i've got two other profiles here, but it gets to be a pain swapping needles, and it's good enough for now.. i'll get it booked in for a session on a dyno now the spec isnt due to change for a bit and make sure i take all my needles with me.

what are your DJ needles like ? smooth taper or stepped at all ?

[jake]

they are stepped and go to a fairly thin point compared with the fatter standard ones i have.
because of my homemade ramair box, with this new engine, im having probs with running very rich, up to 9k ish, then spot on at 10k, before going wildly lean upwards after 11k.

waiting on my airbox to be moulded, so hopefully this will even it out a bit. she's hitting 70hp as it is now tho

i might even try to raise the needle a bit on the dj needles if i can... thats if i get no joy from a set of standards.
do you reckon solder would hold the disc on the needle further up? would'nt want bits of toad loose in the carbs

[zimm]

judging by what you've said, i'd unblock the air correctors and fit bigger mains, give it the ability to lean out the middle, and hold a consistent mixture up top.

but i could be wrong, mines not been on a dyno yet

you can machine the slides so the needle seat is lower, but it gets complicated .. lol.

your DJ needles sound like mine, they gave a great rush from 9 -11, but fluffy below there and the power tailed off quickly above 13 where now it dips slightly at 13ish, then picks up again and drives hard to 15,000

need a reputable dyno operator somewhere round here to see what figures its got, and how close i've got it.

[Mori Man]

its ace

tbh, its so nice to look at, and sounds so good with a nice sharp edge to the sound, that i'd happily live with it even if it caused a massive hole in the power delivery .. but it doesnt.

lol , i've said the same thing before

Sounds like their "Pulse" can technology works then - need to look out for another.

later, Drew

[deviant]

14/47 is going to be a bit low for the road, but should be fun

nah, it's spot on IMO. First is a bit short when combined with the H gearbox, but other than that it's great.

[zimm]

14/47 is going to be a bit low for the road, but should be fun

nah, it's spot on IMO. First is a bit short when combined with the H gearbox, but other than that it's great.

1st is the same ratio on both mate , its 2nd, 3rd, 4th, 5th that differ.

i like the perkiness of 14/47, but i keep going to hook 7th on fast bits.

[zimm]

right, ... just got back from having her run up on the dyno at M and P in swansea,

first few runs with it as it was were a little disappointing to be frank, peak of 57.33bhp @ 12500rpm but really, that was a spike, and it's more like 55bhp :smt013 it was also quite rich through the whole rev range. The good news was that the curve was lovely, no flatspots, and consistent fuelling.

so we had a chat about what to do, and he suggested smaller main jets and dropping the needles.. cept i cant because they are stock and cant be dropped any lower..

so we pulled the snorkel/intake thing off the airbox and ran it up again .. 62bhp. but consistently lean..

so out came the gaffa tape ! made the hole in the airbox a tad smaller with the gaffa, and try again ..

64.48 bhp on a single run
65.89 bhp on a though the gears run

and the fuelling is almost perfect.

i reckon there's another couple of bhp to be found by taking the gaffa back off going to 107 mains and .5mm shims under the needles .. but that can wait.

anyway, here's the graph.

[jake]

bloody hell dude, that line is almost perfect, unheard of on a zxr!
i think thats good power for the spec mate. I had the same setup as you nearly, beet, sp cams and h airbox mod, and i had 62 on a dynopro.

chris at dynopro racing is doin me a proper airbox over the next week or two, also a bbplastics style bellmouth plate, which he has had very good results with, +3 hp im told.
might be worth getting one of them?

[zimm]

bloody hell dude, that line is almost perfect, unheard of on a zxr!

there's more to come at the top for sure, i know i can get more air in there, and i've found some 110 jets in the garage out of an NC30..

as for further mods, i guess its match the inlet stubs to the inlet ports, cams, and headwork (got a spare head im going to attack with the dremel)

i'll get a ramair box for it when the 600 is finished and can take over as my road bike, although if its rich with the 110's i'll tear the foam off a stock filter and just run the gauze.

kinda wish i'd had the DJ needles in there, cos it did feel stronger from 10-12 with them, but that might just have been cos there was less either side of that range, it certainly wasn't fuelling as consistently as with the stock ones.

[zimm]

muahahahaha ..

f*** me ..

SP Cams + programmable ignition fitted today ...

then tacked a plate on the back and went for a quick ride.

wether its the cams or the ignition map i dont know, but the flatspots and snatchy throttle i was plagued with at anglesey have disappeared completely .. and the topend is awesome .. places i could nail it before im having to back off or short-shift.. if its making less than 72bhp i'd be very very surprised.

hope it stays dry tomorrow.. go and find a dual carriageway