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what size is a t3 turbo?

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Old 11-18-2007, 10:05 PM
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Default what size is a t3 turbo?

were puttin a turbo on a 804cc atv and i wanna know what mm is a t3? is it 30mm or am i missing something..looking for something 30mm or smaller and cant figure out how to tell..i know nothing about turbos so this is prolly a stupid question
Old 11-18-2007, 10:11 PM
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Originally Posted by baddls1
were puttin a turbo on a 804cc atv and i wanna know what mm is a t3? is it 30mm or am i missing something..looking for something 30mm or smaller and cant figure out how to tell..i know nothing about turbos so this is prolly a stupid question
T3 is simply the type of flange on the exhaust housing. There are several different size T3 turbos.
Old 11-18-2007, 10:19 PM
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what determines the mm of it? like the one with a .50 a/r compressor and .63 a/r turbine? what that mean lol im an idiot
Old 11-18-2007, 10:24 PM
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Read whats in thses links:
http://www.forcedinductions.com/help.htm
http://www.forcedinductions.com/helpadvanced.htm
http://www.turbobygarrett.com/turbob...ch_center.html

That starts at the very basicas and ends at what builders need to know.
Old 11-18-2007, 10:31 PM
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im just tryin to figure out if the 804cc motor will spin the turbo i was talking about
Old 11-19-2007, 09:42 PM
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Originally Posted by baddls1
were puttin a turbo on a 804cc atv and i wanna know what mm is a t3? is it 30mm or am i missing something..looking for something 30mm or smaller and cant figure out how to tell..i know nothing about turbos so this is prolly a stupid question
First of all, for the rpm range of those 804cc's, you'll probably want something on a t2 flange. It should be small enough for that .8 liter engine. Most t2's are sized for something in the 1.3-1.8 liter range. What kind of atv is this?
Old 11-20-2007, 01:55 PM
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T3... 3MM turbo!! , ... Not really, like stated above, it's the type of exhaust flange.
Old 11-20-2007, 01:59 PM
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On our KFX700, were running the GT12. Works great. The race version is a bigger turbo but I dont remember off the top of my head.
Attached Thumbnails what size is a t3 turbo?-kfx-kit-7.jpg  
Old 11-20-2007, 07:13 PM
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its a 2007 raptor 700. bored and stroked to 804, fully ported, custom cam,bored throttle body,stand alone fuel management all that mess.
Old 11-20-2007, 07:31 PM
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whys is th t2 turbos all way more money than the bigger ones? and all the ones i see are internal wastegates...i want an external
Old 11-20-2007, 10:15 PM
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Not sure, almost all small ones are internal. You can always make it external. Got a welder handy? =)
Old 11-21-2007, 07:22 AM
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What's wrong with an internal wastegate? It greatly simplifies plumbing and saves some money.

There are lots of different size T3 turbochargers. I have one sitting on my counter that will support 350 hp, so it would be inefficient and laggy on a 4-wheeler. The A/R isn't enough info to tell anything of significance. Measure the compressor wheel inducer and that'll tell you allot.

The GT12 is a pretty good pick, without knowing the NA hp of the motor. Garret says it's good for 400 - 1200 cc and 50 - 130 hp. It has a tiny 29 mm inducer. It's $590, which is about as cheap as quality turbo gets.

Mike
Old 11-21-2007, 07:03 PM
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stock the motor makes 40hp now it makes 77hp all motor. ive seen a guy on raptorforum.com who has a gt-28 on one and said it didnt lag hardly at all and it had no internal work done..i know nothing about turbos but id say gt-28 is way bigger than gt-12? and on the wastegate, i just think it looks bad. its a show quad too so everything is polished or powdercoated, so i wanna keep it clean lookin
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Old 11-21-2007, 07:04 PM
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from the ones ive seen with gt-12, that rocket factory 700 has alot bigger turbo on it-total size tho
Old 11-21-2007, 08:48 PM
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Originally Posted by baddls1
...has a gt-28 on one and said it didnt lag hardly at all ...
Sorry I'm going to have to call BS on that one. The GT28 is commonly used on engines 3 times that size.
Old 11-21-2007, 09:31 PM
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well u can bs all ya want, i dont know what it had but it was for sale and thats what he said it was.....isnt that also liike sayin u cant put a huge turbo on a 4cylinder? if thats the case how is there 2000hp imports runnin 6s in the 1/4? those are very small cubic inch motors that anyone would say no way it will spool up two turbos that size but they do it dont they?
Old 11-21-2007, 09:52 PM
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IF... Big if you go with something like a t25, or a t28. I would definatly go ball bearing, and maybe even try to get a twin scroll setup. More money, but you should be able to get a bb twin scroll t25 building boost decently.

Ps. You can put a t3/4 that supports 600 hp on your atv. But you probably wont spool till 5-6k and your usable power band would be horrible, so thats why you get a smaller turbo that spools up around 2500-3000. T25 might be doable as well, ive never put a turbo on an atv, but lots of 600 cc motorcycles almost always go t25/t28.

Good luck, Chris
Old 11-21-2007, 10:26 PM
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well power falls off at 9200. they make awesome torque so wouldnt it be okay for the turbo not to come in so early? but its instantly at 4500 soon as u leave, and i would leave close to the rev limiter anyway. only drag racing with it,never anything else..and im not gonna run but bout 6lbs of boost, so wouldnt that make it work easier than if i was gonna run 20lbs
Old 11-22-2007, 12:06 AM
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+1 on GT12 or GT15, We ran one on our UTA formula SAE car with great results on a 250cc engine that made probably close to 50hp n/a (19,500 rpm). The smaller turbos are generally more expensive because they arn't nearly as ones that can be used on most automotive engines. Why not try an eaton M62 or something, single cylinder engines are awful for pulse flow on the exhaust side. Why do you only want 6psi? It would be real easy to just run it on e85 at 1 bar of boost and then you won't have to worry about intercooling it or anything. Once again reference to that formula SAE car, would form ice on the intake manifold on a hot summer day with on track air temps reaching 120+, non intercooled at that.

Don't mean to sound like an *** or anything but why the hell are you drag racing an ATV?
Old 11-22-2007, 01:17 AM
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Originally Posted by baddls1
.....isnt that also liike sayin u cant put a huge turbo on a 4cylinder? if thats the case how is there 2000hp imports runnin 6s in the 1/4? those are very small cubic inch motors that anyone would say no way it will spool up two turbos that size but they do it dont they?
Nobody said those spool fast either.


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