more power

Posted: Sat Jul 25, 2009 6:36 am

I have been thinking about this for awile,I dont have the $7,500 for a jet engine for my bike right now,SO..turbocharging seem to be my only option, anyone have a small one laying around? from a 1000-1500cc engine? like on a gas terramite? I guess im just like everyone else..can never have to much power!

Posted: Sat Jul 25, 2009 7:27 am

I'll bet if you talk to Rob at CYCLE RE CYCLE II in Indy he can find something.

Posted: Sat Jul 25, 2009 2:04 pm

Gene,Robbie has a lot of shit,talks a good game,but thats all. I believe its still his dads place. I do most of my biss is with porter..these guys wont have on,and if they do,it will be worn out.besides,i need something larger than a gpz turbo.

Posted: Sun Jul 26, 2009 3:33 am

I've read about GPz guys using an IHI from a Ford Thunderbird 2.3L Turbo Coupe as an upgrade. There's a lot of those around as many TC owners upgrade to the larger AiResearch T-3 or larger.

Posted: Sun Jul 26, 2009 3:57 am

Yes sir,there are many of those around,but they are to big and will spool up very slowly. a small 1000cc motor just wont provide enough exhaust flow to make them work properly..I want boost from 2500rpm up,not just wide open.

Posted: Sun Jul 26, 2009 4:11 am

I would expect that to be true. I was very surprised when I read about the 750 guys using them.

Posted: Sun Jul 26, 2009 4:28 am

Well, I don't think I'd bother trying to get too much boost into one of these motors. They don't really have the bottom end for it. The 900 crank is the best of the bunch, and it uses the smaller primary chain. The available bearings don't hold up well. The 1000/1100 rods are ok, but you can can still get Carrillo rods, they're $1300 (list) a set new.

Posted: Sun Jul 26, 2009 4:47 am

Gene,did you forget? I dont have a 1100f motor in my frame. Its a 88 CBR motor.

Posted: Sun Jul 26, 2009 5:14 am

crank wrote:

Gene,did you forget? I dont have a 1100f motor in my frame. Its a 88 CBR motor.

got a pic or 2?

Posted: Sun Jul 26, 2009 5:26 am

theres a pic ,in pics section, cranks,modified cb1000f

Posted: Sun Jul 26, 2009 4:33 pm

crank wrote:

theres a pic ,in pics section, cranks,modified cb1000f

I meant a picture here - posted in the thread

Posted: Sun Jul 26, 2009 5:43 pm

There are/were turbo kits made to fit these bikes.

Mr Turbo,RC Engineering,others but all were similar back then. The carburetor was a modified Harley and mounted on the intake of the turbo. Common called "draw through".

The problem is it makes a piss poor street bike. The fuel "puddles" in the turbo while idling,so "loads up". The larger problem is slowing down. If you have boost the throttle has no effect for 2 to 3 seconds,meaning it keeps going till the boost subsides. This effect also makes it hard to ride on anything that looks like a curvy road,due to the on/off delay even off boost.

Late turbo cars have a boost dump valve and are fuel injected. These turbos are different internally,ie no seal to enable draw through operation.

Oh I have built three turbo bikes,two CBX and one of these fours. The four was a drag bike and has run 8.0's at 170+ mph,taking about 28 psi boost to do it. This bike had all manner of ignition retards and staged waste gate to control it. The CBX's were "trailer queens" for the "wow" factor.

The rider on the CBX was "showing off" to his buddy on the other one at Daytona one year. Joe pro super racer had race fuel in it and turned the boost up to 15 psi. Mind you these bikes were not stock chassis either and had wide rims with large tire. So he is riding along at about 70 on the freeway and downshifts TWO gears wicks it up,to drop the clutch,and find immediate sideways,full tire spin but luckily rode it out of it. Meaning throttle chop asks to high side you. Anyway the effect subsided at way over 100 mph.

Motor internals must be built to take this abuse,like Carrillo rods,forged pistons and "O" ringed cylinder. The other version is a little boost so it looks neat but does not really gain for the complexity involved.

First build is to make 1123cc engine size and work the head,keep normally aspirated. This usually gives enough power to get arrested. Turbo type power gets you a time in jail if you live. There is such a delay,ie "turbo lag" that by the time the power gets there you no longer need it.

Posted: Sun Jul 26, 2009 6:54 pm

firemun59 wrote:

I meant a picture here - posted in the thread

Will this do? Very Happy

Posted: Sun Jul 26, 2009 6:55 pm

All true,great stories, but none of it pertains to what I want to do. If you have a turbo that might work,let me know.

Posted: Sun Jul 26, 2009 6:58 pm

Thanks Randy!!

Posted: Sun Jul 26, 2009 7:02 pm

You don't seriously expect to get much motor advice for that here do you?

Posted: Sun Jul 26, 2009 7:07 pm

Gene,engine knowledge I have,.a turbo,I dont.

Posted: Sun Jul 26, 2009 7:15 pm

You don't see a lot of turbos on these bikes, I wouldn't expect to see any kind of line forming to sell you a turbo here any time soon. Maybe a few on CBXs. There are guys putting them on zx-14s and modern big bikes, check the race forums.

Posted: Mon Jul 27, 2009 3:03 am

I am,but it never hurts to ask. Who knows,with all the different people on this site I might just get luckey! Best wishes to all C.

Posted: Mon Jul 27, 2009 4:13 am

Modern fuel injected motors make insane power stock.

The record right now for a turbo charged intercooled STREETbike is 700+ HP at the wheel.

This is using a Hayabusa based bike.

They back off the boost to the 500 ish HP level to make it rideable and run somewhere in the 7.0 flat 200+ mph range. This is a bike without a wheelie bar.

www.dragbike.com

These are dedicated race bikes and not for tooling around the local Burger King.

Posted: Mon Jul 27, 2009 4:35 am

All true,but no one has one like mine,and then turbocharged,and then with maybe 40 more hp it would be a awsome very,very,VERY fun machine!

Posted: Mon Jul 27, 2009 6:21 am

I can see that. Wink

Posted: Mon Jul 27, 2009 4:49 pm

You REALLY do not understand turbocharging.

40 Hp is within easy to do regular hop-up mods. It is LAME for a turbo motor.

Turbocharging has drawbacks mostly related to lag,both on and off. The boost dump valve on modern cars makes it at least turn off,but there is a delay from when you send for power and it arrives.

The best factory turbo bike was the Kawasaki turbo 750. We have one. It will just flat leave the 1100,any speed,any gear. There is a web site devoted to this bike www.750turbo.com. It can run with my kid's '02 GSXR and it is a pig,if was 150# lighter,it would leave it also.

The guys on that web site have easily made over 200 HP at the wheel.

You do not work on gain 40 HP,you work on double and triple what you have now.

You should ride in our turbo Mitsubishi. The problem was press fit wrist pins on the pistons so no easy way to change them. It BREAKS the top ring land,not the ring mind you the ring land under it. Just shears it off. It now has special slipper skirt 2618 Wiseco pistons capable of holding 350 HP PER PISTON,tool steel heavy wall pins and Carrillo type rods. This car is not fast for an import it is fast period. 120 cu in and just sails past 120 mph way less than 1/4 mile. It is now running a GT35R ceramic ball bearing turbo and now at 20 psi boost. The turbo can generate over 40 psi if we can get the fueling under control to exploit it.

This car will spin all four tires under power and is frightening to drive on a road due to the "slithering" it does occurring at say 100 mph up.

Sheppard's Talon has run well into the 8's @180+ using this combination.

Turbo charging is like ordering some dirt for your flower beds. You want a bag or two and a dump truck shows up,with more of them lined up down the street. Your order power and it arrives,so you better have something to do with it.

Posted: Mon Jul 27, 2009 11:23 pm

Sonic,I understand turbos very well,What dont you get? I dont want to drag race,I just want to have fun. dont want to hotrod the motor with internal upgrages for more power. Get it now? I want something different. If you dont want to post something positive,or constructive,then please dont post. I was around when indy cars were running 80in of mercury,now how old I am now?...So thanks but no thanks.PS.I was around when my late uncle Roger Ward won his last Indy 500. Chris. And yes Rick,and Robin still live here,in Indy.

Guest

http://cgi.ebay.com/ebaymotors/HONDA-CB750-HONDAMATIC-TURBO_W0QQitemZ330347560314QQcmdZViewItemQQptZUS_motorcycles?hash=item4cea3fbd7a&_trksid=p4506.c0.m245

Posted: Tue Jul 28, 2009 12:36 am

Good then you know all the complexities to install one. I stand corrected. Where do you plan to get the computer to run the referenced boost,or the MAP sensor you will need,or for that matter the boost compensated fuel pressure regulator?

Posted: Tue Jul 28, 2009 1:14 am

I installed a aftermarket ecu to run my fuel injection, It can do all those functions,and more. all thats needed is programming.