S40autoX Posted February 29, 2004 Report Share Posted February 29, 2004 yeah really, at 19psi, im sure the tiny 12t is far into compressor choke and all it is really doing is superheating the air. It might be able to make 19psi at really low RPM, but it will soon run out of steam and be way out of its efficiency range. yes, teh turbo is moving more air, but it is so hot it is not very dense...im curious...Carlos, have you ever tried running a little less boost and made more power? Link to comment Share on other sites More sharing options...
alboracerS401568908554 Posted February 29, 2004 Report Share Posted February 29, 2004 but carlos has the upgrades to cool it down.... Link to comment Share on other sites More sharing options...
bond1318 Posted February 29, 2004 Author Report Share Posted February 29, 2004 unless hes got a tank of liquid helium spraying on his intercooler every few minutes then he doesnt. i mean seriously, he doesnt believe in waterspray (neither do i) so he doesnt have that, so what else other than the autotech intercool are you referring to? the ATIC is *great*, but its not holy. i mean sure hes got mad upgrades, but as good as the autotech IC is its not good enough to make that superheated air as dense as it should be. i'm with s40autox on this one, i think theres a happy medium between the superheated 19psi, and a lower psi with more dense induction. but its not worth the trouble to mess with. im sure hes perfectly happy with his current set up. besides, if 19psi were fine for the 12t, there would be no point in upgrading your turbocharger... Link to comment Share on other sites More sharing options...
samofli Posted March 1, 2004 Report Share Posted March 1, 2004 S40autoX wrote on Sun, 29 February 2004 11:26yeah really, at 19psi, im sure the tiny 12t is far into compressor choke and all it is really doing is superheating the air. It might be able to make 19psi at really low RPM, but it will soon run out of steam and be way out of its efficiency range. yes, teh turbo is moving more air, but it is so hot it is not very dense...that is exactly what I wsa refering to. Link to comment Share on other sites More sharing options...
cs40racing Posted March 1, 2004 Report Share Posted March 1, 2004 I think i've gone over this several times but for those who missed it I'll explain it again.Yes I run 19psi, but I don't constantly ever get it up that high (ex. from light to light, etc.. etc..)The 12T is awesome for running 19psi just because it's so small and hence the reason i'm pushing high torque, however when it does hit 19lbs I don't just mash the pedal to the floor, it doesnt work that way. I hit it about 25%, then another 25%, by that time the turbo is spooled then I gradually floor it and let the boost creep to hit 19lbs (this explanation may not be very accurate but you get the idea), so when I push the 40 hard it's only at 19lbs for maybe about 3~4 seconds.As far as heat soak in the intercooler is concerned, yes it gets hot, extremely hot when running hard. The exhaust helps cool the turbo down alot however, as well and engine bay tempurature so that's why everything still runs nicely.That's why the turbo upgrade is a necessity now. A larger turbo running less pressure will not only work more efficiently but make the same plus more power while maintaining things a bit cooler. Link to comment Share on other sites More sharing options...
bond1318 Posted March 1, 2004 Author Report Share Posted March 1, 2004 makes sense. but looking at it this way, how you were saying its never really at a full 19, you do agree with us when we say that 19 is too high for that little guy Link to comment Share on other sites More sharing options...
cs40racing Posted March 1, 2004 Report Share Posted March 1, 2004 Of course! Link to comment Share on other sites More sharing options...
S40autoX Posted March 1, 2004 Report Share Posted March 1, 2004 lol...that makes alot more sense now...poor little turbo lol.. Link to comment Share on other sites More sharing options...
Tracy1568908555 Posted May 9, 2004 Report Share Posted May 9, 2004 hey Folks,the Original Pics of the How-To arnt Comming Up. Could Someone Refresh those Please? Thanks, Link to comment Share on other sites More sharing options...
bond1318 Posted May 9, 2004 Author Report Share Posted May 9, 2004 done monkeyin angelfire.. all of a sudden they are not allowing linked pictures. Link to comment Share on other sites More sharing options...
Tracy1568908555 Posted May 9, 2004 Report Share Posted May 9, 2004 Thanks man!!I just ordered up a Boost Gauge, Should I Tap in Before or After the MBC? Link to comment Share on other sites More sharing options...
alboracerS401568908554 Posted May 9, 2004 Report Share Posted May 9, 2004 no... tap ur boost guage into Here Link to comment Share on other sites More sharing options...
Tracy1568908555 Posted May 9, 2004 Report Share Posted May 9, 2004 Good Deal. I somehow missed that Excellent How-To. Thanks! Link to comment Share on other sites More sharing options...
Kelalper Posted July 10, 2004 Report Share Posted July 10, 2004 I wanna ask something.I live in Istanbul and have 1998 1.9 T4. I read 0.8 bar on the gauge but dont know the max boost of my turbo. It is 14T or 12T. And what do you recommend for max boost with manual boost controller? And which model do u suggest? There are 2 model for volvo on the Web. I also changed my cat. with a pipe. Is that necessary for preventing the turbo from overheating by the exhaust?Thanx Link to comment Share on other sites More sharing options...
janis1568908554 Posted July 11, 2004 Report Share Posted July 11, 2004 Kelalper wrote on Sat, 10 July 2004 03:24I wanna ask something.I live in Istanbul and have 1998 1.9 T4. I read 0.8 bar on the gauge but dont know the max boost of my turbo. It is 14T or 12T. And what do you recommend for max boost with manual boost controller? And which model do u suggest? There are 2 model for volvo on the Web. I also changed my cat. with a pipe. Is that necessary for preventing the turbo from overheating by the exhaust?ThanxMax boost of the 14t (which is in the T4) is about 1.45 bar I read somewhere, but there's more to take into account, like temperature and the danger of running lean (not enough gas).I wouldn't go higher than 1.2 bar. In your country it's HOT, soeven 1.2 might be too much. You might need a bigger intercooler or a waterinjection system.ANY MBC will do. It's a valve that, depending on the tension of a spring blocks air to the wastegate (so it stays closed). When the valve opens, the air goes to the wastegate and the exhaust gases don't go through the turbo anymore. That's the way it limits boost.I bought this one:http://www.boostvalve.com/index2.htmlCurrently, I limited boost to 1 bar as I'm having some trouble with my aquamist water/alcohol injection system.Janis Link to comment Share on other sites More sharing options...
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