zxr924 turbo nearly finished.

jpbikeboy · Post by **jpbikeboy** » Sat Nov 12, 2005 3:53 pm

Well, after a lot of fuckin around i finally got my motor back together with the JE forged pistons. The engine is fitted to the frame and everything is fitted except radiators and exhuast. I have to get the exhaust modified to clear the sump. Should be running by the end of the week. FINALLY!!!!!

aardvark · Post by **aardvark** » Sat Nov 12, 2005 6:46 pm

Geeze mate, you don't mess around do you? The engine for my bucket is still sitting on my workbench.... in one piece!

Can't wait to hear how she goes.

SocialSecurity · Post by **SocialSecurity** » Sat Nov 12, 2005 10:09 pm

nice!

so what kinda snail is going on it?

and what fuel system?

jpbikeboy · Post by **jpbikeboy** » Sun Nov 13, 2005 12:31 pm

The turbo is a hi-flowed Hitachi HT-10. the fuel system is custom made Throttle bodies and plenum using bosch 240cc injectors, a peirburg pump and using a microtech MT-4 EMS. I fitted the radiators this morning and the exhaust will be tomorrow i hope. then the fun begins......... tuning

HemiDuty · Post by **HemiDuty** » Sun Nov 13, 2005 8:24 pm

Wow man that is just awsome. That thing is going to fly!

So is this Hitachi hair drier anything like the ones they had on the rx7s, or something smaller?

Will we see it in another mag when it is finished?

I wish they allowed turbos in roadracing.....

jpbikeboy · Post by **jpbikeboy** » Mon Nov 14, 2005 5:01 am

The HT-10 is smaller than the one on the RX7. if anything its probably a little bit too small for the 924cc motor. i've sacrificed a little top end for rideability so it should boost up pretty quick.

SocialSecurity · Post by **SocialSecurity** » Mon Nov 14, 2005 1:53 pm

did it cost much to put the turbo together?

i wonder if anything from garretts GT series would be suitable for a ~900cc bike

i think its probably for the best that turbos are not used in motogp, sbk etc

diesel · Post by **diesel** » Mon Nov 14, 2005 6:48 pm

but imagine the highsides we'd get to see!
short-shit outta honda then bang the turbo kicks in and into the bay rossi goes!

:D

HemiDuty · Post by **HemiDuty** » Mon Nov 14, 2005 10:37 pm

So I take it it is an internal wastegate unit? And if the turbo is a little small for the engine, are you concerned about the wastegate at all? Because if it is too small the wastegate might get over-run by the volume and temp of the exhaust gas in the manifold, and boost creep might occur?

And what sort of boost figures are you going to run? This side of a bar? Also are you going to run it on Ultimate or something more exotic, and what compression do you have in the motor? Running a Knock sensor?

Your bike is so cool...... I am super jealous.

SocialSecurity · Post by **SocialSecurity** » Tue Nov 15, 2005 2:19 am

boost creep shouldnt be an issue if the wastegate was machined out large enough (providing it could be) while it was being highflowed

i recall he is running stock compression with high comp forgies and a spacer to bring the compression back to stock

going too small on the exhaust side isnt always a good idea, pinging will be a big issue if you cant get the exhaust gas out quick enough

but i figure he knows what hes doing, this isnt his first

btw, just outta curiosity, did the previous turbo bike blow up?

jpbikeboy · Post by **jpbikeboy** » Tue Nov 15, 2005 5:45 am

My mate is running a garrett GT-25 or maybe a 28.

That is probably a more suitable turbo, although it's not as rideable for on road use. As far as my turbo goes, the wastegate port has been machined as big as it can to avoid boost creep. I calculated my mew Comp ratio the other day and i'll be running 11:1 which is slightly lower than standard but the pistons are forged so i don't think i'll have a prob there as i'm only running 8-10psi. As far as the old motor goes, it was running like a champion the day i pulled it out, but the gearbox was a little tired(80,000km) of abuse. It was a stock 750, with the cast pistons with a comp ratio of 9.8:1. I ran it at upto 18psi and the pistons were fine. With the EFI you can tune it to be a little rich on boost to help keep thing cool. Once again, sacrificing a little power for reliablilty, but with over 200hp who gives a shit. I couldn't tell you how much it all cost as i've lost track, but unless you like to spend a lot of time in the garage, i'd probably just buy a 10. I've had it turboed for three years now and in that time i've gone bald........

Nanna10r · Post by **Nanna10r** » Tue Nov 15, 2005 5:51 am

Cant wait to see this monsta when she's done.
Cheers Brett

Mojo67 · Post by **Mojo67** » Thu Nov 17, 2005 12:02 am

Totally lost in the lingo. Nodding politely, will insert the appropriate oohs and wows where I can.

MickLC · Post by **MickLC** » Thu Nov 17, 2005 8:22 am

Mojo67 wrote:Totally lost in the lingo. Nodding politely, will insert the appropriate oohs and wows where I can.

yeah, me too, but I'd still love to see it in action

YAPPA · Post by **YAPPA** » Thu Nov 17, 2005 10:04 am

Mojo67 wrote:Totally lost in the lingo. Nodding politely, will insert the appropriate oohs and wows where I can.

I'll break it down 4 ya.....
sum1 has alot of time & money & a good shed
they're pretty clued up with mechanical shit
bolted on a big round thingy that blows oodles of air & fuel into the motor fast
they had a bita fukin round with sum finer details
end result will be your heart gettin a cardiovascular workout every time you get to about 5000rpm
your sphincter will get a work out 2 as it'll be puckering like a suction cup 2 keep ya 2 the seat
after a cuppla hundred k ride your arms will b 6 inches longer
the thing will launch like a cut snake & go like the bejesus
you'll have a grin on ya face that you can't even slap off 4 a week
it may even b better than sex

hope this has helped explain it 2 the non mechanically minded