DoctorMotorcycle's Turbo Kit Development for 86-03 Sportster 1200's

[DrMotorcycle]

Originally Posted by sportsterpaul

A really nice tidy package, you’re doing good, thanks for sharing.

Thanks!

[DrMotorcycle]

Almost done!

Been very busy with fabrication on the Version 2.0 kit, very excited to test this out on my Sportster and bring the kits to market. Still waiting on the turbo to show up, so now it's just going to be a waiting game.

[brucstoudt]

is that a wastegate on top with the rod attached?

[DrMotorcycle]

Originally Posted by brucstoudt

is that a wastegate on top with the rod attached?

That's the wastegate actuator, yes. Staying w/internal wastegate on the production kit.

[DrMotorcycle]

Photo dump, will post a text update later today. -Doc

[brucstoudt]

currently i see nothing in the openings for the breather bolts exiting the heads in the oem intake area.i used a horseshoe breather vent in that area breathing to atmosphere.i see a round canister nearby not sure what you're doing with that?

[DrMotorcycle]

Originally Posted by brucstoudt

currently i see nothing in the openings for the breather bolts exiting the heads in the oem intake area.i used a horseshoe breather vent in that area breathing to atmosphere.i see a round canister nearby not sure what you're doing with that?

Externally Venting, just.....haven't got there yet.

Update;

Most of the legwork of the Version 2.0 setup is finished. I already have in mind 2 or 3 tweaks I'm going to make to this before production, but they're such minor changes it's not worth writing about.

The Turbo/Carb currently mocked up on the bike are for that purpose only; I'm waiting on the Carbon Sealed turbo to show up, which I'm having done professionally from now on. All the turbo's will be VSR balanced as well, which is very important, and the reason many turbo's fail. Yes, I will have an option for a Genuine Garret turbo; you're looking at about an extra $750 or so. That's the price difference between the eBay turbo and a Genuine Garrett.

I'm making a back to back comparsion video of the old setup vs. the new. My gut instinct says it's going to be way more "punchy". I used this same turbo on the XJ650 Cafe Racer build, and on a 650cc inline four it was laggy, but good grief, did that bike hit hard as hell. Would swing to 4psi quickly, hang out for a second, and then WHAM 12psi and it took off like a scalded cat.

I'll post and update when I get a solid ride on the bike w/new turbo setup. Would like to be able to get a nice long ride in this Sunday, we'll see.

-Jimmy

[DrMotorcycle]

First ride was a success

The bike absolutely rips now! The smaller turbo was a massive step in the right direction. Really turns the bike into a midrange monster. I've never had this much fun on my sportster; I've been riding it so much the past few days, my ass hurts .

Just torque in spades, and this is only on 8psi of boost. Still running the Dyna 2000 ignition, the next plan of action is to switch to the MAP based ignition, tinker with the launch control, and test out a few ideas. One of those idea's being boostane injection (for those that want to run higher boost + those with higher static CR), the other a quickshifter for WOT shifting.

There's a few other small things I want to test as well, one of those being a direct, back-to-back comparison of plenum volume. Going to be very busy over the next few months making small little tweaks here and there before bringing the kit to market.

Next update when ignition and launch control are on, and I'll likely have the boost at 12psi by then hehe.

[Nibelungen]

Interesting... midrange monster...
a question.... why not to fit her with a proper exhaust?

[brucstoudt]

^^^ ''proper'' rules don't apply with forced induction.