As my bike sits it has the following
110" fuel moto extreme duty steel lined cylinders
CP forged pistons 10:1
Ported and polished heads and thottle body
Bottom end was trued, welded, pro plugged and stock rods were heat treated
Timken lower end conversion
Barnett clutch basket, HD spring with AIM VPC
Cycle rama 575 cam
Currently making 108HP and 128ft/lbs
How much boost would i need to bring the bike up to 150ish HP?
Any concerns with the added power? I feel the clutch and motor should handle it
Can't say for turbo, but you could use a Pro Charger with an 8 pound pulley, new injectors, different cam, retune, and break 170- may need some port work to do more.
Attached are a couple examples.
Already purchased the turbo but looking to keep it mild i was thinking even 6-7psi and see what it puts out without changing cams . Didnt know if someone on here had experience with a similar set up
I thought that turbo engines need lower compression, not sure how much lower, but 10:1 seems high from what I remember. It's not something I work on, just that some random info sticks in my brain.
If I was going forced induction, this is the guy I would talk to:
https://www.dragosbikeworks.com/superchargers-turbos.html
Quote from: Hossamania on September 15, 2019, 09:57:35 AM
I thought that turbo engines need lower compression, not sure how much lower, but 10:1 seems high from what I remember. It's not something I work on, just that some random info sticks in my brain.
Id think thatd be the case for a high boost build but trask advertises you can put a their kit on a stock 103 high output which has 9.8:1 CR from the factory
Quote from: dheath9994 on September 15, 2019, 04:05:50 PM
Quote from: Hossamania on September 15, 2019, 09:57:35 AM
I thought that turbo engines need lower compression, not sure how much lower, but 10:1 seems high from what I remember. It's not something I work on, just that some random info sticks in my brain.
Id think thatd be the case for a high boost build but trask advertises you can put a their kit on a stock 103 high output which has 9.8:1 CR from the factory
Good to know.
Dynamic compression ratio can get quite high. At 10:1 static, with a 35° close cam, yields 9.4:1 corrected CR. That same motor becomes a 13.86:1 dynamic CR motor with just 7 PSI boost.
Gonna need lots of fuel and very little timing to keep it together
Yea i spoke with dragos bike works and he told me the rings sold with the pistons on these 110 kits are very thin and dont hold up well to boost. Looks like i may have him bore my stock cylinders to 107 and get me some of his 9:1 pistons and his 570 blower cams
If you're only looking for 150HP, is there a reason you went with a turbo rather than going for something like a high compression 124" build that could hit 150?
Not questioning the decision, just curious of the pros and cons for both scenarios. Was the turbo easier on the wallet rather than doing a different build?
Well i spent a few thousand on the lower end of the bike last year to handle big power so rather than boring the cases and doing that all over again i got an awsome deal on the turbo and have always been interested in them
Quote from: dheath9994 on September 17, 2019, 01:21:15 PM
Yea i spoke with dragos bike works and he told me the rings sold with the pistons on these 110 kits are very thin and dont hold up well to boost. Looks like i may have him bore my stock cylinders to 107 and get me some of his 9:1 pistons and his 570 blower cams
If you already have the 110 cylinders why not just get different pistons with better rings? Seems like it would be cheaper plus you get the benefit of 3 additional CI.
I spoke with Trask performance directly today they told me they have been putting their kits on bikes with fuel moto 110 big bore kits without any issues for a few years now. They also told me their engine kits they sell for their turbos comes 106" with 10.5:1 compression and their blower cam has specs very similar to Se255 cams. Said my cams and compression should not be an issue with only 8psi of boost.
Can I ride it when you're done? :teeth:
Quote from: Hossamania on September 19, 2019, 08:55:48 PM
Can I ride it when you're done? :teeth:
Allowed to, or able to ride it? :potstir: :hyst:
Lol :chop:
Quote from: PoorUB on September 20, 2019, 04:11:11 PM
Quote from: Hossamania on September 19, 2019, 08:55:48 PM
Can I ride it when you're done? :teeth:
Allowed to, or able to ride it? :potstir: :hyst:
Start with, "Captain may I?" After that, my lack of ability may shine through. But I'm up for it!