Hey everyone. Im looking for any help picking a turbo for my build. Im for sure going with a turbonetics form treadstone but which one im unsure of. I was looking at a t3/t4 but im not sure what trim or ar. From the research I've done it seems the bigger the trim the higher the hp and the higher the ar the higher you need to rev to actually make boost. My goal is 250 whp and still be able do dailey drive with out being in boost the whole time. Im going to have bisimoto forged pistons and rods along with all ARP hardware but unless anyone says I can rev higher I plan on limiting it to 6500 rpm. So to recap I want a turbo that will make boost from aprox. 3500 rpm to aprox. 6500 rpm. Thanks! Oh, and id also like to water cool it to eliminate the need for a turbo timer. Any input on that?
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Last edited by hondakid1996; 05-04-2012, 06:41 PM. -
Why make another thread?...you could of easily asked this on your previous thread that's not old.
There's a lot you still need to know about a turbo, besides its trim size or what's it capable of HP wise.
You mentioned a t3/t4 turbo which would be a nice start not to big not too small but perfect for our engines. It's a hybrid (t3 & t4)
You also mentioned you want the turbo to spool at 3500 well...that's going to be a problem, especially if you want to limit it to 6500 rpms.
A smaller turbo spools quicker at low end and falls on its face on top end, when a bigger turbo lags but once its fully boosting the your top end is at work, but the lag is whats everyone worried about. Yet everyone knows there's always going to be turbo lag.
For 250 whp I suggest you look into
T3/t4
BEVOIII 16 G
20G
Originally posted by deevergote -
Sorry about making a new thread. But okay thanks for the info. These are the turbos I was looking at:
http://www.treadstoneperformance.com...im+Stage+3+.63
http://www.treadstoneperformance.com...im+stage+3+.63
http://www.treadstoneperformance.com...im+stage+2+.63Comment
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Why turbonetics? If your goal is only 250whp you don't even need a 50 trim that's rated to 500whp. Maybe something like this would be better?Originally posted by hondakid1996 View Post
http://www.treadstoneperformance.com...rrett+T3+TurboComment
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Look at the price though. Those turbonetics are only 679. Plus I can have room to grow if I decide to run more boost.Originally posted by Sordz View PostComment
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Originally posted by turboAccordHSF View Post
What a crock. Spooling a turbo soon is so easy to do. People just don't know how to build a good system.Comment
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So you could build a setup that will spool a holset hx55 at 2500rpm's?Comment
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Easily. Its called nitrous oxide and antilag. But the amount of cyln pressure would just destroy a engine as small as ours. You'd just blow it up.
A well setup gt3071 should have full spool at 3200 rpms.
People don't realize a turbo makes boost almost instantly. Its the intake volume that slows the boost down. This compounded with a tiny engine that should be pushing big v6-small v8's. All that's needed is some small fuel and ignition trims usually.
Just don't do the "I plan on going bigger later" bs and get a intercooler that is too large. That one of the biggest problems, the second issue with intercooler selection is people run them too thick and not thin/tall enough. After 2"of thick the amount of cool air available is almost gone,and a thicker unit, while flowing better, wont cool much better at all.
An oversized intercooler also causes unwanted pressure drops from too much cooling. Don't get me wrong, we want cold air, but we don't want a large pressure drop caused by the intercooler either.
On the choking point, aside from outside a turbochargers turbo graph, the car should have a very flat tq curve. The ones that don't make good top end power have not done their homework on how to evacuate as much exhaust volume as possible.
Header design and wastegate placement are pretty critical. Many people overlook it. Regardless how light air is, it hates making 90*bends, and still people use this for their wastegates all the time. They are also positioned on 1 exhaust port runner, this is fail. Because exhaust doesn't want to change directions from cyln 2,3, and 4 to travel back to 1 just to exit the wastegate. Then we have people that cry about boost creep.Last edited by MortsAccord; 05-06-2012, 03:03 AM.Comment
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