Engine mods to handle turbo - Yamaha YXZ 1000R Forum
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post #1 of 22 (permalink) Old 04-02-2016, 06:49 PM Thread Starter
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Engine mods to handle turbo

Anyone with a turbo have issues yet? My dealer swears up and down that this motor will blow even at low boost unless you upgrade the rods... I'm upgrading the rods.. I sure can't hurt. And I want reliability.
Any input would be good.. my turbo is on its way!



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post #2 of 22 (permalink) Old 04-02-2016, 08:23 PM
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Stock motor untouched, MPI turbo @ 5psi, 38hours, 770 miles, only changed oil once at 20 hours, it is still golden, I haven't had any issues. It'll be interesting to hear what others are experiencing.
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post #3 of 22 (permalink) Old 04-03-2016, 02:34 AM Thread Starter
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That's good! Would you say you push it pretty hard or not?
I can't imagine it's a given to have problems with the thing I'm sure it's more likely of course but who knows.. and yes I'm interested in hearing what everyone else has to say too.. thanks for the input!



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post #4 of 22 (permalink) Old 04-03-2016, 07:12 PM
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Do I push it hard? Ask my passengers who get real religious real quick. All I hear is "OMG, OMG, Let me out"
One of my passengers is a 340# guy, can't say that I notice the weight slowing me down. Looking at my hours to miles ratio will give you an idea of average speed. My buddy in a 570 ranger crew has the same hours but half the miles, slo poke.

I've done trail rides of 100 miles a day going as fast as prudent. I'll shift early and do most miles in the 4-5Krpm range. But if there's a straight, I'll shift between 9-10Krpm @ wot and run 5th up to the 80mph cutoff, which happens about 8800rpm in 5th. I've never hammered on it above 7Krpm for more that 20 minutes. I've never banged the rev limiter, never needed that extra 800rpm, just shift and blow boost.

My mechanic, Jimmy Giese, [email protected], has a lot of experience in these things. I do know that one of the fellows got the stage2 MPI for 190HP and they did put titanium rods in the motor.
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post #5 of 22 (permalink) Old 04-03-2016, 09:41 PM Thread Starter
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Gotcha.. so medium then
Ya I have passengers piss in their pants most of the time.. but I won't even ride with my causin. . The guy is psycho haha.
Thanks for the info!



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post #6 of 22 (permalink) Old 04-03-2016, 09:43 PM Thread Starter
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I'm pLanning on putting about 7 lbs of boost to it.. I feel safer with upgrading the rods for sure.. it will certainly get pushed. It'll be on a lot of long straight trails too so she'll spend some time in the upper rpm range



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post #7 of 22 (permalink) Old 04-03-2016, 11:15 PM
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If you're putting rods in, you might as well put ARP head studs in also.
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post #8 of 22 (permalink) Old 04-10-2016, 10:14 AM Thread Starter
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Ok So one thing lead to another and its' getting the recommended kit from MPI for 200 HP tubo kit.. Crower rods, head studs and thick head gasket.. I'm going to run the Silber turbo at about 8 psi. .. dont quote me on this but if I remember right that'll be about 175 HP..
Anyone else have the MPI (or comparable) engine mods yet? any input would be great.
I'm really hoping I'll have it back by next weekend so I can put the turbo on.. I will post pics and update on the install.



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post #9 of 22 (permalink) Old 04-11-2016, 07:42 PM
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Seems foolish to me to change the rods and not the pistons... I have quite a few cars out and running 7psi all day long on stock motors, and have yet to see a single rod failure. Keep in mind your setup will only be as reliable as your tune...

Nate
Alba Racing
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post #10 of 22 (permalink) Old 04-12-2016, 12:48 AM Thread Starter
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Thanks for the input Nate,
I'm trying to learn as much as possible about this.. Why would you say that's foolish? am I going to have problems with that or just wasting money? I'm following what MPI suggests for the 200 HP kit.. from what I thought I could do either pistons or head shim.. If you could elaborate I'd appreciate it!

Thanks



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