I've got the B6T DOHC in my 93 MX-3 SOHC

[maldo]

OK, the truth is coming out. 007sniper, you are on crack. The vj-20 is inefficient past 15psi. I talked to Braden, has one of the fastest Bp motors, using a 1.8l BP and a VJ-20 he was only able to hit 205whp with an E6K. Even at 20psi he only hit 260ft-lbs.<P>Do your research.

[pakix2000]

J-spec b6-t motors come with LOW impedence fuel injectors with a vj-6 turbo not a vj-14>>...<BR> <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by maldo:<BR><STRONG>OK, the truth is coming out. 007sniper, you are on crack. The vj-20 is inefficient past 15psi. I talked to Braden, has one of the fastest Bp motors, using a 1.8l BP and a VJ-20 he was only able to hit 205whp with an E6K. Even at 20psi he only hit 260ft-lbs.<P>Do your research.</STRONG><HR></BLOCKQUOTE>

[texmx3]

hey maldo i tried saying that already what he is trying to do in his post has more holes than a whore house but i guess he knows what he is doing and saying!!

[maldo]

Geeez man, cool it. IF you need help, all you need to do is ask questions. Telling us you are going to be reaching a 400hp goal with a list of parts a mile long that won't even add up to 250whp is a waste of time that we don't need. Look at it from our perspective. We, as in Pakix, Tex and I have done our research. We take the time to read a post that is total crap. I don't need to waste my time, I have done the research and so should you. You have a goal of 400whp, great cause that is near what I want too. But don't tell me you can do it with a VJ-20, I have been around long enough to know that even a T25 or T28 won't flow enough to get you there. You want to find parts worth the money and your time then here is a list of some places to check.<BR> <A HREF="http://www.larsenmotorsports.com" TARGET=_blank>www.larsenmotorsports.com</A> <A HREF="http://www.todaracing.com" TARGET=_blank>www.todaracing.com</A> <A HREF="http://www.turboimports.com" TARGET=_blank>www.turboimports.com</A> <A HREF="http://www.takakaira.com" TARGET=_blank>www.takakaira.com</A> <A HREF="http://www.roadraceengineering.com" TARGET=_blank>www.roadraceengineering.com</A> <P>That is just to start with, remember that any part for the 1.6l miata can work on your b6t.<P>If you have questions pertaining to certain build ups go to the 323GTX egroup and discuss it with the guys there. These guys rally race 323s, they know their stuff.<P>If you need ideas on how to make power, post that.

[-=deathtrap-mx3=-]

the the b6t or bpt come with a blowoff valve and wastegate? how much aftermarket parts/money does a b6t/bpt require? i'm pretty sire i remeber you need a boost controller and gauges(duh), new piping(what size), upgraded clutch. anything else?

[maldo]

Both motors will come with a bypass valve and the turbo has a built in wastegate. You will need to upgrade the clutch. Boost and A/F gauges should be purchased. I/C pipes can be fabricated, I used 2.25" mandrel bends. You don't need to buy aftermarket parts. The ecu and injectors come from a Pro LX and the MAF from a FC3S. IF you want to upgrade the ignition to a MSD system you can.

[-=deathtrap-mx3=-]

thank you! thank you! thank you! thank you! thank you! thank you! thank you!

[OsoSlo z28]

hey maldo, do you think i will need to swap the maf off the bpt? if so, from what motor? thanks

[maldo]

I am not 100% sure. Are you going to use the stock MX-3 wiring harness? What ecu are you going to use? IF you are using a protege/323 ecu, I would say that you would need a MAF from the RX-7. You need to find a maf that runs on the same voltage. Some start high and go low after the car is started, some are opposite. Either way it has to match the ecu in order to function properly. You could always go to a Haltek or TEC-II, then the metering device is supplied.

[OsoSlo z28]

i'm going with the gtx ecu and harness. i'm going to get a stand alone and haltech seems to be the one of choice, but for now i need to focus on the swap. one large sum of money at a time <p>[ December 06, 2001: Message edited by: cre8v mx3 ]

[maldo]

I am familiar with the boys at Reich Racing and the Project323 page. The problem is that your thinking is off somewhat. You can turn the boost up as far as you want as long as the turbo is effecient enough to make the power. The stock turbo VJ-11 can make power up to 16psi effeciently. If you go to 18psi, watch the boost gauge. As soon as you reach about 4400rpm you will start to lose your 18psi of pressure because the turbo can't sustain the pressure past that speed. The VJ-17 is what Mazda used to produce serious power, it was capable of 20-30psi while still being overly effecient. The vj-20 is capable of 20psi, but it lacks the efficiency of some of the other choices out there. The more effecient a turbo is at higher speeds, the more lag there is at lower speeds. You can't have a turbo that is quick to spool and can support 400hp without any form of lag. Can't have the best of both worlds. The Vj-20 can sustain boost at 18psi for everyday use, there will be more lag associated with it. The problem is that the turbo can only do so much. Braden, the guy with the Pro LX pushing 200+whp, uses a Haltek E6K among many other mods. Remeber also that he isn't using the smaller 1.6l, he has the larger 1.8l BP motor. Therefore, if he can only produce between 200-220whp on the larger displacement motor, the B6T should produce slightly less power. Possibly in the 180-200whp. <P>I still have to say that the claim of a possibly 400whp is unfounded. No where in your info did it say anything about the vj-20 being capable of flowing to 400hp. The Vj-16 is only capable of 250hp, remember, this isn't at the wheels either. The 250hp is the very upper limit of the compressors efficiency and it won't be able to hold the pressure to 6k rpm.<P>I have said it once and will say it again, Ben is dumb. Ben knows nothing about the Mazda lineup at all and should be avoided to save yourself any humiliation. The vj-20 is factory set at 7psi, it can handle 15psi but is not efficient at 20psi. In fact the VJ-20 is only rated up to 250hp on IHI's website...this figure is optimistic judging by its size.<P>If you want to understand some of the basics regarding the b6t, check out SCC's Project 323GTX build up. It will give you some basic ideas of what gains can be had with certain mods. JOIN the 323gtx egroup, you can discuss more of this with the guys who race these cars. Get and read "Maximum Boost" by Corky Bell. At the very least, read SCC's 10 part feature on turbochargers and superchargers. This would answer the majority of your questions and give you a good idea of where to start.

[maldo]

Forgot to answer that last part of your question.<P>Look at spending some money on a custom manifold. The best example is one made by Larsen Motorsports. CRD Motorsports is working on one and so is Jackson Auto. Get one of those once all your other mods are done and it is time to look at the turbo as your next restriction. I would be looking at a Garrett, Turbonetics or similar turbo company for literature. A good choice is the T25 or T28, both will help you hit the 300whp mark but not much over it. The T3/T04(E) will help you do that 400whp goal. Sizing is key and a definite science. Use the compressor maps to help you size the turbo needed. Other things will be 3" exhaust right off the turbo (say good bye to your AC), cams, porting, etc. Before you do anything, make sure the ignition and fuel systems are up to spec.