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13-09-2005, 07:51pm
Hi Ray,
From the research i have been doing either way has it's merits and it's pitfalls.
With the turbocharger you need to virtually upgrade the whole fuel system to supply more fuel under boost conditions. This can be done the way i am doing it with an aftermarket ECU like the S&R Pro intercepter, which is a poor mans motec, bigger injectors, and a boost referenced regulator. Or you need a Fuel Management Unit which raises the fuel pressure so you are in the vicinity of 90psi at the injector when it is squited into the bores. The stock injectors will not see you past 200hp and that would go for a big bore kit too IMHO.
There are a few other things you need to think of in the mechanical front ie keep the turbo above the sump or it pisses on the ground when you turn the bike off, and smokes like a bastard on startup.
I am building for 250HP on the street and dont want to go past 10psi of boost. I like technical installations so would like to run controlled boost for the gear I am in. (T shirt, open face helmet 4psi, Full leathers, back protector, full face lid 8psi, Suit of armour to resist the flying bits of motor, 20psi)
My worry with the big bore kits is the lack of cooling in the jacket area, the lack of support for the piston skirt in the diameter vs length ratio, and the fact that you are going to have to beef up the starting mechanism. It would be interesting to each follow our own paths and see where we end up in the horsepower race. I know I'm good to 250HP on stock compression, ~300HP decompressed, and then I need stronger valve springs and rods to continue upwards.
Lets have an open chat at Latte night and get the ideas out in the open. My collection of bits for the snail is coming along nicely so I may be ahead of schedule.
Anybody else out there who wants a new blokes perspective to turbos drop me a line.
Regards
Graham
1hotBUSA
Strike a blow for freedom...Smash a speed camera!!!
Burn the Copper Silver and Gay Mardi Gras Pink!!!
Red/Grey and Blue Blacks Rule!!!<i></i>
From the research i have been doing either way has it's merits and it's pitfalls.
With the turbocharger you need to virtually upgrade the whole fuel system to supply more fuel under boost conditions. This can be done the way i am doing it with an aftermarket ECU like the S&R Pro intercepter, which is a poor mans motec, bigger injectors, and a boost referenced regulator. Or you need a Fuel Management Unit which raises the fuel pressure so you are in the vicinity of 90psi at the injector when it is squited into the bores. The stock injectors will not see you past 200hp and that would go for a big bore kit too IMHO.
There are a few other things you need to think of in the mechanical front ie keep the turbo above the sump or it pisses on the ground when you turn the bike off, and smokes like a bastard on startup.
I am building for 250HP on the street and dont want to go past 10psi of boost. I like technical installations so would like to run controlled boost for the gear I am in. (T shirt, open face helmet 4psi, Full leathers, back protector, full face lid 8psi, Suit of armour to resist the flying bits of motor, 20psi)
My worry with the big bore kits is the lack of cooling in the jacket area, the lack of support for the piston skirt in the diameter vs length ratio, and the fact that you are going to have to beef up the starting mechanism. It would be interesting to each follow our own paths and see where we end up in the horsepower race. I know I'm good to 250HP on stock compression, ~300HP decompressed, and then I need stronger valve springs and rods to continue upwards.
Lets have an open chat at Latte night and get the ideas out in the open. My collection of bits for the snail is coming along nicely so I may be ahead of schedule.
Anybody else out there who wants a new blokes perspective to turbos drop me a line.
Regards
Graham
1hotBUSA
Strike a blow for freedom...Smash a speed camera!!!
Burn the Copper Silver and Gay Mardi Gras Pink!!!
Red/Grey and Blue Blacks Rule!!!<i></i>