Turbo connection makes a kit but I haven't heard anyone use it, in fact I only know of 6 turbo Bonnies and I have built, or helped build, them all.
There are many opinions on how stupid it is to put a turbo on a Bonnie: Buy a GSXR, it looks wrong, it will blow up, and so on. But not one off all the people who have tried my bike say it's a stupid idea, they all think it's one of the greater ideas there have ever been :wink:
A turbo kit is normaly $3,500 and up. I would go EFI too if I was you. I can build a bike for you or just get you the right parts if you like to build one yourself. If you use Megasquirt EFI I can even tune it over the Net!
jojje, what turbo do you use? Do you use stainless downpipes/exhaust? It looks like it from your pictures...
Do you weld stainless or have it done?
I can weld, but my mig welder is only setup for mild steel. I made exhaust pipes for my XS650 but they're mild steel and I'd worry about rust issues, especially with a turbo where you wouldn't want leaks.
On the streetbikes I use a Schwitzer S1BG-L. You should use stainless pipes between the head and turbo since steelpipes can't take the heat. You can MIG weld it with a standard MIG setup but of course it's better to TIG it.
I have tried 9.5:1 but it's no good on regular gas, one reason might be that I don't use an intercooler. 8:1 is perfect though. And don't worry that you won't have enough torque down low, I have 140NM at 2,500rpm but that will only trash the clutch so I never ride it like that. Once you are over 3500RPM there is no lag at all. It doesn't feel like a 120HP 900cc but like a 120HP1,800cc. It's similar to a RIII to ride only much faster
There was talk about a Triumph only meeting at Bonneville, then I would try to go. But I haven't heard anything for a while. It needs planning so I need to know soon or I won't make it.
You could always fly over here and see me racing, and try my bikes!
Sharpshooter: I have a Turbo Connections kit on my 01 ST, and it works great. However, it costs $6K, support from TC is adequate at best, plus if a turbo malfunctions even at a low mileage (my turbo failed at about 3000 miles) it comes out of your pocket, not TC's.
JOJJE's set up uses an turbo with a wastegate (inexpensive), whereas TC's is a variable vane (no wastegate, read VERY expensive $2K). The variable vane turbo is nice because it has no turbo lag at all. A turbo with a wastegate has turbo lag if the turbo is a bit on the large side.
The price JOJJE quoted is an excellent one, especially if that includes the EFI set-up. I hope JOJJE develops an intercooler setup, because that will pull out some of the heat that limits boost pressures. Cheers, tommyturbo2.
Variable vanes are cool, I have it on one off my bikes, but the spool up is just as fast on my street bike. You don't get much lag on twins. The main difference is that with the VNT you get a power curve that looks more like a NA engine, with a wastegated turbo (that isn't very big) you get more torque at the middle and less HP at top
An intercooler is always a good idea but it's ugly.. and since I can run 14psi and get 120hp without one I'm happy as it is. The stock engine can't take much more than 120hp and still last for years anyway. If you still want more you can always run on E85, it actually cools the air more than an IC up to about 20psi. I run 28psi on my dragbikes, E85 no IC.
Well, a turbo kit and EFI would cost a little more. But still less than $6,000, even if we include a Wiseco kit and a reprogramming off the ignitor
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