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May 25, 2009, 11:12 AM
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#1
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Newbie
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Drives: RalliART
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Will UDP work with the turbo?
I have decided to go turbo so I'm getting rid of my bolt on, so I was wondering if the UDP is a good fit for the RA turbo? Should I sell it or keep it?
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May 25, 2009, 05:11 PM
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#2
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Evolved Member
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Drives: 2004 Mitsubishi Ralliart Turbo
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keep it.
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May 25, 2009, 09:05 PM
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#3
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Ok. Thanks man.
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May 26, 2009, 07:47 AM
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#4
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Bad idea. When you go with boost you end up with a lot more crankshaft deflection (obviously since you're making more power). You need the harmonic damping of a stock or properly damped pulley.
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May 26, 2009, 08:50 AM
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#5
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Drives: 2004 Mitsubishi Ralliart Turbo
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--
__________________
What do you mean "is that an EVO?" You were behind me the whole time, didn't you see that Ralli//Art emblem?
My Ride in the Registry...
My car on Youtube
http://www.youtube.com/view_play_lis...A57FD58D18C3E5
///RRM Turbo'd and proud. Trust me, you NEED this.
04-06 Lancer/Ralliart parts for sale!! (PM me)
-4g69 Heads
-Stock Hood (yellow)
-RRM turbo fuel/piggyback kit (both stage 1 and 2)
-Air conditioning system
-Maybe some spare motor parts (I have 3 motors)
-Much more!
Last edited by Ralliart_on_LSD; May 26, 2009 at 08:54 AM.
Reason: lol nevermind
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May 26, 2009, 02:40 PM
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#6
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Drives: 2004 Ralliart Demon
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what?.....I guess it helps but usually when you increase the power or do things that do a negative effect on the engine you get parts that do a positive effect creating a solution or a balance.
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May 26, 2009, 11:55 PM
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#7
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Hackish, so you suggest putting back the stock pulley? What would be the neg effect of keeping it?
Does someone with the UDP and a turbo kit please let us know his opinion?
More info guys please.
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May 27, 2009, 11:54 AM
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#8
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Evolved Member
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i had the pully on with the turbo kit for 2-3 years with no problem at all.
__________________
What do you mean "is that an EVO?" You were behind me the whole time, didn't you see that Ralli//Art emblem?
My Ride in the Registry...
My car on Youtube
http://www.youtube.com/view_play_lis...A57FD58D18C3E5
///RRM Turbo'd and proud. Trust me, you NEED this.
04-06 Lancer/Ralliart parts for sale!! (PM me)
-4g69 Heads
-Stock Hood (yellow)
-RRM turbo fuel/piggyback kit (both stage 1 and 2)
-Air conditioning system
-Maybe some spare motor parts (I have 3 motors)
-Much more!
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May 27, 2009, 12:01 PM
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#9
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Evolving Member
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Location: Minneapolis, MN
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I've had turbo + pulley for six months, also no problem.
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May 27, 2009, 03:03 PM
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#10
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Quote:
Originally Posted by mr.ralliart
Hackish, so you suggest putting back the stock pulley? What would be the neg effect of keeping it?
Does someone with the UDP and a turbo kit please let us know his opinion?
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Yes, I suggest putting the stock pulley back on. 9 times in 10 you won't have a problem unless you're pushing 300+hp. It's that other 1 in 10 times where you have the problem and have to replace the engine.
-Michael
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May 27, 2009, 08:46 PM
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#11
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what's your reasoning?
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May 27, 2009, 09:16 PM
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#12
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well just run the pulley. I don't have any issues with my high compression engine which is over 300+hp. I haven't seen any issues running the RA with over 300+hp with an UDP. But also i have done the cranks for these RAs also. #1 crank pin and rod journal are out of balanced. There is a possibility of damaging the engine by running the UDP but i have yet to see it with the absence of the vibration dampener. Remember this, whenever you modify anything there is a chance of failure which is why i am sure hackish brought that up.
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May 28, 2009, 12:59 PM
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#13
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Quote:
Originally Posted by Realistic
what's your reasoning?
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Crank deflection is proportional to the amount of force applied by each piston. This means the more power you make the more it will deflect the crank as each cylinder fires. This deflection is the beginning of crank harmonics. Damping these will stop the crank from "ringing". If you have the time there are many SAE articles and other engineering pieces written on the math to calculate these things.
-Michael
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May 29, 2009, 12:14 PM
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#14
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okay.. and having a heavier pulley will help this... how?
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May 29, 2009, 12:27 PM
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#15
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Quote:
Originally Posted by Realistic
okay.. and having a heavier pulley will help this... how?
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It's not an issue of weight, it's an issue of vibration absorption. The stock pulley is actually a 3 piece pulley. A steel center, wrapped in dense rubber, then the outer steel part that the belt rides on. That dense rubber absorbs vibration in the crankshaft.
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