Turbo Talk

[OB_Mr Bear]

Yngve sounds like he knows his stuff. But in North America, and on this site, there is only one guy I would ask about this. Of course that is Turbo Rick. I don't think he has put a turbo on a Busa yet (I may be wrong), but his GSXR-1100 is definitely a one-off original. He built it himself, and it is one impressive machine. I mean, 400 reliable horsepower, and he can ride it to its limits. That tells me everything I need to know. And he may have a line on getting us deals on turbo kits for our bikes. I don't want to speak for him more than I just did, but he's a pro.

 

[OB_Yngve]

Wronglane.
I put not in "" because I know its beeing done ( oringing watercooled engines ). On motorcycles U have to be much more careful than on a car-engine because of the lack of metal. ( how to explain ? Motorcycle engines got a lot LESS metal in theyr heads and that means that the head and cylinder distorts much more easily. )
Its easier for an engine builder to say: sorry, no can do. Than to do it carefully... UC ?

Jamie. If U have a carburated engine mcXpress have found a new way to modify the carbs to make them suitable for blow through.

Before ( ask any turbo builder ) they used to change everything inside the carbs. Jets, needles , springs , U name it. And they had to do a LOT of dyno and street testing.
mcXpress does one or two dynotests on theyr engines. Thats it.
Mark Moisan couldnt belive his ears when Erik Marklund told him that they only dynotested the new GSXR750 2 times before they were satisfyed.( the carb version )( mcXpress know about turboes...)
Headgasket:
The new ones made of several layers of steel with alupaint between are the bollox. They withstand ANYTHING. I use them on my GS1100 drag engine. I got 83mm pistons with 15-1 comp. No leak of any kind, no o-ring, who can ask for more?

 

[OB_jeffw]

Sent an e-mail to MC Xpress about the turbo systems they offer, this is what I got in return:

Hi Jeffw.
The kit is complete with everything you need included. Turbo, exhaust manifold, new exhaust pipe, intercooler, clutch springs, pressure meter, one extra fuel pump and regulator, 4 extra injectors, a new air box, and a lot of other parts.

You can buy from our USA-agent American Turbo Systems in Naples Florida. He is selling our turbosystems in his name. (He want people to think that it his own kits, and it's no problem for us.) If you would like to contact him, say that I sent you. He has the phonenumber 941 403 0198.

Best regards: Erik Marklund

You can adjust the turboboost -and the power of the engine- up and down on the
wastegatevalve, no problem.

What this means to me is the price of the system just went up!


[This message has been edited by jeffw (edited 24 November 1999).]

 

[OB_ianfila]

FYI on putting an "o" ring around a block.
I have a 450 hp buick grand national engine running 20 psi and my engine tuner in NJ who has built some of the fastest GN's on the east coast (1000 hp & 7 sec cars, used on the street!!) does NOT recommend the "o" ring block mod on turbo cars, (i am assuming here that the same concept applies to bikes), the reason is that when the engine needs to release pressure for any reason, by using the 'o' ring block mod the engine cannot blow a head gasket so instead grenades the whole engine! Instead he recommends a copper gasket with copper coat sprayed on both sides then if their is a problem and you overboost, the head gasket will blow saving the engine. This guy has been doing this for 15 years and is known for building very reliable motors!

 

[OB_GSXRTURBO1]

Jaime, the Felpro head gaskets that have an o-ring design are different than what o-ringing a block is. The gaskets are a compsite design that have an o-ring between layers of the gasket, which compresses into the gasket when torqued down for a better seal. When o-ringing a block, you actually have a small diameter wire laid into a groove machined into the block that "bites" into a copper head gasket. The problem with water cooled motorcycles is that the cylinder liners are thin, sometimes too thin to machine the groove and risk having things move around and breaking the seal. Also, as Yngve mentioned, copper gaskets sometimes have problems sealing oil and water passages. It suppose it can be done, but gasket technology has come a long way, and a good teflon composite head gasket could probably seal just about anything, as long as there is sufficient clamping force applied EVENLY (enough head bolts/studs surrounding each cylinder).

 

[OB_GSXRTURBO1]

Turbo1300 said:
my turbo is a efi and i really don't have any lag in my boost

Turbo1300, I'm jealous! My system works, but it is nothing like an EFI system with a modern turbocharger would be like. Maybe someday....