TURBO

I want to turbo my streetfigher maxim, and I was wondering...will any turbo work, like t3, t4 turbos or is there a special type...I am aware that doing this will be a total fab job...but Im up for it....

 

No body has anything to say about this.....?! 8O come on!!!

 

I'll chime in. I don't think you can just slap a turbo on. You would need to do a TON of tuning afterwards just to get it to run right and then it is variable because the performance profile would be entirely different at differing RPMS. That's why factory made turbo bikes have boost sensors, waste gates, knock sensors and a slew of other equipment.

Also, you need to consider the wear and tear. The engine will run hotter and component wear will increase. Many turbo bikes have especially hardened cams as an example.

Sounds like you have a long way to go just in designing the system and how it will work. Of course with enough effort, time and money you'll get it done but will it be worth it? That being said, I don't think it matters what turbo you use. I would recommend grabbing a parts Seca Turbo engine and associated parts and retrofitting it to your street fighter maxim.

My two cents. Good luck with the project!
Fraps

 

Given what Fraps said, it might be best to try finding an existing turbo engine out of a Seca and modifying/rebuilding that to your specs....

 

Well guys....let me tell you what I was going to do.
I was going to take a T3 turbo, and make a exhaust manifold, and down pipe. Plug in my BOV, waste gate, Oil line, and return oil line. Im also going to install an Oil cooler. and Meth injection
Is the maxim engine not strong enough to handle boost.

 

It should work fine, right up until the moment that your rear tire drives over your crankshaft............ :lol:

 

Search this topic in past forums. I have seen this discussed here before (don't have particular reference) but many considerations were discussed. It seemed like the way to go was like Fraps said.

 

lmao....Chacal whats bad about that......Are you saying that it would tare things apart....I know it would give some crazy power....but I wouldn't allow it to run enough boost to kill the engine. its a street figher guys....I dont want the engine to Frag, but I want to kill anything at any given' moment. Plus the sense of accomplishment...

 

you're probably going to have to lower your compression which means rebuilding the top end, which end turn might require rebuilding the bottom end, change the fuel delivery system (different jets, carbs parts or different carbs entirely), fabricate an intake, change oil pump, fabricate exhaust...etc...but I'm sure it can be done, something I would love to do, Just Because!

 

even if Im running low boost....all of that....btw im doing EFI!
Well I want power....and if there is another way of getting power then someone tell me....

 

More cubic inches.......??

 

Well I'll tell you....I dont want to swap out my engine unless it frags or something....I just want to be able to get some serious racing power out of the motorcycle. I know that boost maybe very bad for it, but from what other have told me that it wont actually frag the engine, but the engine will over heat badly simply becuase of the turbo's heat and the lack of water cooling, which I could understand that. So if a turbo is not logical, what would be a way that I can get some serious power and top speeds gains out of the maxim. Keep in mind guys, there will not be a carb on this bike, it's EFI.

 

Top speed gains will be limited due to a lack of gearing options. You should be able to allow it to reach its 135mph top end a lot sooner though. I'd suspect XJ engines are a good choice for hot rodding due to the seamless (almost) interchangeability of parts between the 650, 750 and 900. They are pretty strong motors, perhaps not quite as strong as a GS/KZ, but probably stronger than a CB. I'd probably go for a NOS setup if I was building from scratch.

 

nitrous, use only when needed! but don't forget the "Go Baby" button :lol:

 

Do you guys think that even if I kept the boost down to about 8-10 psi, that it wouldn't be worth putting it on....Nitrous is great, but TURBO.....oh yeah......that would be greaaaaaaat.

 

darkangel, I was in Ottawa, Ks. this past saturday at Oz cycle salvage (785) 242-0600 and he had 2 Seca turbos he is parting out.......hope this helps.

 

From what I know about these turbo bikes is that you don't really feel the gains until near 6000 rpm. Off the line, I don't think you'd get the performance you want.

 

That's generally true of turbos. They have minimal effect until the hot exhaust gasses are flowing. They help at the top end, not the bottom.

 

well guys that's what I want....but also keep in mind...we are not talking about the lil turbo on a seca this is a T3 turbo, and there will be Meth injected into the system....for cooling since the engine does not have a H20 cooling system.
I really just want to know.....Is the engine going to blow up if I use min boost? Can I use a turbo on the engine safely?

 

Sounds like a wicked project but I don't think you can get an answer to that. Since no one has done it before it is experimental and I'd personally love to see the results.

 

Aftermarket turbo's retro fitted to older engines are usually set to a max boost of around 8 psi. The answer as to whether it will blow an engine is unknown. Plenty of older bikes have been converted but only time will tell.

It depends on how you plan on riding it. From what you have written, I presume pretty hard is the answer.

Performance down low in first gear will have know difference. But once the revs are up the boost will be noticable all the way to top gear if the gear changes are made near redline.

The weakest part of putting extra power in is the gearbox. The extra strain on already worn parts could be the killer. If you have any shifting problems or jumping out of gear problems now then I wouldn't do it. The extra boost will frag the box in no time.

Would I bother? Probably not. It would be a challenge, but the mucking around and cost will blow out. For my money I would be looking for an already turbo'd bike to put the T3 on.

 

Just my 2 cents
Ive been riding a seca turbo for 7 yrs now and i run 12-14 psi of boost with no problem. The diff. in engines between the bikes though is a concern. The turbo model has some beefier internals also the carbs are completely diffrent ( therer pressurised) so i would suggest if u can get your hands on one cheap enough, a complete engine from a turbo bike with the computer because the mapping for the ignition timing is diffrent than a non turbo bike.

 

I am by no means an expert on these bikes or turbo systems in general. But, one major problem is the aluminum pistons will not stand up to the heat. Number two, how much do you know about turbos? Do you have any real world expirence or are you just another magazine mechanic? The term t3 is a "family" of turbos. there are many diferent t3 turbos to choose from. Most if not all of them are going to be much to large for a street bike. I am not trying to sound like a know it all or insult you in any way. I have just seen way to many people blow up engines.

 

Turbo's used a special sealed carb. Check out YOUTUBE - HAYABUSA - TURBO - GHOSTRIDER and look at all !!! my source for adrenaline!

 

yes i know a T3 is a family of Turbos, but they are all in the general category of how much boost they provide flange size, and bla bla bla. I'm a diesel mechanic and by no way a motorcycle specialist, I know my way around, but not perfectly. My bike shifts find, at one point its only issue had been shift into first hard, but after i turned down the RPM's a lil it shifts great......why turbo......Because I can...and the experience...As it is, the bike will be EFI, and i will be putting a Megasquirt on the bike for that...so I was figuring hell....why not slap a turbo on there....tune the engine, and put boost at about 6-8 psi, add a lil meth injection, and let her go. When I want the power is when i race....this bike has tons of potential....BUT i want power....
How much I know about turbos, A lot, i've had to replace them, rebuild them, you name it.
Finding a descent priced seca turbo around here would be joke....My I would love to have one...But Guys lets remember...this is a street fighter...I would like power....and right now...ppl say...get a 900 engine...THAT"S FRIGGIN hard to find....Get a 650 Turbo Engine....oh let me pick that up off the street....This stuff aint easy to come buy....a ok turbo 190$ Megasquirt 2-250$, r1 Throttle body-90$ small meth injection=some serious fun!

 

Do you plan to use 4 throttle bodies or just one larger one? Do you really think that any t3 is small enough to be effective? I would suggest finding a 13b or 14b off of a first gen eclipse. They are a dime a dozen. When you get it done I will have to ride down a check it out.

Were do you work?

 

Kenworth in Liberal, Ks my friend. Or maybe you can catch me in Manhattan, ks when I go back to school at KSU. I'll be kill'n a few ppl around in that area when Im done building...lol

The TB off of the R6 is just like the carbs on an XJ, it is a set of 4. Diff is they are made for a down draft in flow into the engine , but since there is no float horizontal mounting wont hurt.

 

Ah, I work for carrier. I fix and install apu's and refers. Let me know the megasquirt works out. I have been really interested in using one for awhile.

 

Lol.....I use to work for National Carriers down here...Repairing Refers and bull wagons...By the way...I believe that a turbo off of a probe will work.

 

8-10 PSI is a moderate amount of boost. Most people that turbo charge bikes (custom turbo set up's) only push 6-8 PSI.

 

SO SHOULD I DO IT GUYS!!!!!! :twisted:

 

a t3 is going to be too big. will you be able to get boost from it? yes. will it have alot of lag? yes. what you want is something small capable of a decent ammount of boost. ideally a turbo straight off of a seca turbo would be best. they are mitsubishi tc03-6a turbos. but seeing as how there were less than 10 thousand produced worldwide over 20 years ago, that is somewhat hard to comeby. your next best bet is a mitsubishi tc03-9a. these are the same turbo with a different impeller. it has slightly more lag, but also has slightly more boost in the high end. they can be found on older 1.8l mitsubishi turbo engines (I believe the mirage was one of the cars that carried that drivetrain). that is an excellent turbo for a custom project like your describing. dont run more than 8 psi unless you plan to have an intercooler and/or your a/f tuned for the turbo so that it has the correct mixture. the wastegates on these turbos are sometimes troublesome as well, and i would advise you disable the wastegate that is built on and purchase an aftermarket one to install seperately, and have it actuated by a manual boost controller set to 8psi. the main thing to remember is, your engine was not designed for a turbo, which usually means several things. It has a higher commpression ratio than a turbo engine, meaning you get more horsepower per psi of boost than a factory turbo application. it is also cammed and timed to be naturally aspirated, meaning that when you apply boost you increase your chance of detonation and/or catastrophic failure exponentially versus a motor that is built for a turbo. take these things into account and hopefully you wont shell your motor in the process of this project.

the easier route to go, as stated earlier, is to find a salvage turbo bike and swap the powertrain. if you want more power out of it than is offered, then swap the tc03-6a for a 9a, and disable the wastegate. the seca turbos have a popoff valve in the airbox that pops off at 15psi, therefore by unplugging the wastegate and plugging the line, you have just increased your boost from 7 psi stock (1982) or 12 psi stock (1983) to 15 psi. That is almost as much fun as a swift kick in the nuts. 8O

 

Good post man.....I would like a seca turbo, but they are hard to find. I really just wanted my street fighter to have some crazy looks, and power....As it is, Im doing EFI on it....I want something that gives it more power than what it has....

 

efi is a bit more complicated than carbed. im not familiar with the fuel injection system that would be used or how to tune it, but youll need someway to tune it electronically to compensate with extra fuel for the turbo when it kicks in. otherwise your mixture will lean out, youll chance detonation, and youll be constantly fouling spark plugs. The upside to efi is that its easier to get your A/F closer to where it needs to be because most efi uses a MAF sensor to help determine how much fuel to give the motor. find you someone to dyno tune it once the turbo is on it and youll be set.

 

I'm late to the show. I don't come around much anymore.

You need to contact Sean Morley in Wichita.
one2dmax at aol or http://www.fbody.com/members/one2dmax/M ... lecars.htm
He's a great guy and loves hot rodding Vmax's and turbo XJ's. He has parts laying around his shop, and knows what to do with them.
His site isn't designed very well, but he knows his stuff.

Good luck, it sounds like a fun project.

 

If you don't mind me asking, how are you going to do EFI? I knew there were EFI XJ's in Europe and possibly some other countrys, such as the XJ750D....is it a stock form of yammy EFI of something completely custom?

I like how my turbo functions as it is, but i have another whole turbo parts bike that was wrecked. I also have a 750 seca without a motor....I'd like to combine the two into a 750 seca with a 650 turbo powerplant. I'm open for crazy customization which is why i was asking about the EFI. Good luck with your street-fighter!

-Nick

 

I agree with xjturbo. my turbo performs fantasticly with the carb setup. I wouldnt go efi just for the simple fact that its just that much more wiring to have issues with in the long run, and xj's in general are known for wiring issues past the 50k mark. I would try to get in touch with the fella whos info is posted above and see if you cant just get the carb and intake peices and use those for your project.

 

Well guys! news for you, if you're going to do A WHOLE reformation of your bike like I am. You might as well do wiring also! The EFI will be ran by Megasquirt, I'll be using the GXSR 650, and or the R1 throttle body (which ever i can get my hands on) to do the EFI. The only issue that you would have is on a R1 the TB is made for Down draft...that's really it.

 

DO IT!!! I really would think about a small intercooler. It will give you a little more time before you melt the pistons. And you will. Either that or contact these guys www.paeco.com . They do good work and will make custom pistons for anything. The price is right when you consider the alternative.
Also are you going to run a open shaft? The clearence will let you run a little bigger tire. You are going to need all the rubber you can get on the road.

 

Open Shaft......Oh man you better have a picture of that. I've never seen that...i wouldn't even know what to do with a bike that has that much...But what else do you figure I need...besides pistons.

 

You will need to beef up the drivetrain. Heat treat the gears and such. As for the open shaft. I screwed up by mentioning that. I dont think it can be done unless you make it a hard tail and take al the stress off of the housing. Not a very good look for a street fighter. But you can grind down the area of the shaft housing that would cause clearance issues and then weld it closed again. As long as you leave enough space for the tire on the outside and the shaft on the inside you will be ok.
I would have the crank knife edged. I am not sure if the cranks are pressed or not. If they are then I would have the crank welded. There is alot of other things you can do to increase output and reliability. But I have to run. More later.

 

Well dead_cafe, You need to keep on with the advice, I called the guys at paeco, and 680$ will get me 4 pistons over sized, and with whatever compression I want. Problem is what is the standard bore size on these suckers...? Also.....What are you talking about with hardening the rest of my engine....you need to PM me with a set of instructions...lol I might hold off on the turbo, and get the engine bored, if not that....I'll just get the standard size, stronger pistons, with the compression difference. Oh is the bore size larger than 2 1/2?

 

Any suggestions on getting more power ppl?

 

Well if you are going to have paeco make pistons I would just send them the motor. They can balance the rotating assembly. One of my friends spent alot of money with them buliding an 18rg for his toyota. I can personally say that the work was top notch in every way. As for strengthening the drivetrain. I was specifically reffering to the tranny. Heat treating the gears and shafts. I would let someone with expirence do this. As for stock bore size i am not sure.

 

I don't think I am willing to spend that much money on shipping that engine. I don't know....I am probably going to just do the EFI, and see what's up. Because i dont want to burn up the engine.....But I dont want power.....

 

Do you have any friends who work at machine shops? If you are just going to do the efi for now, I would get a set of seca cams. Build and exhaust with bungs for o2 sensors in each runner. That will help alot with getting as much power as possible.

 

I don't know if you spent any money yet, but if this helps, I'll sell you a complete 650 turbo with only 23 Hundred miles.
Edited- - bike is being parted out.

 

Ok....PM me on how much you want, and lets see.
I do have friends that work at machine shops....My father in law is a machinist, and so yeah that's covered. Ummmm, I have to put O2 sensor in anyway for the MSII so that would be a great deal.

 

What happened to darkangel ????

Who wants the lowest mile unrestored turbo bike on the planet ??

It's a project. . .

 

A seca crboame with a TC03 turbo but with some work a TC04 can b made 2 fit .The TC04 came in the early Dodge Cole of the 1980s that is 1 atmisfear higher than stock. Ill pm you with some one that can help.