CustomEngr

awesome. Actually plan 1 sounds good to me. I can pick up a core with all the goods for 1000$ ?

A bigger turbo (rebuilt) for maybe 300$?

And which is a good ECU for this system?



as much as I love the Rotary sound, I made a promise to myself not to build any more loud cars! The cool thing about a quiet car is when you beat someone, you can say

"what's wrong with you car, man? Mines all stock."



And if you lose, "No problem, mines all stock."



...hard to do when you have the sound of Thor's Hammer coming from under your hood.

j9fd3s

turbo + the racing beat revII presilencer = quiet...



i think $1000 would find you a good core, bigger turbo would prolly be more, but it depends on your hookups...



as far as ecu's go, just about anything CAN be made to work, motec is probably the best, haltech's are popular. autronic and wolf are supposed to be good, but not a lot of people have em.



megasquirt looks "ok", lots of people run microtech, but i think it plugs into the stock harness, so if you dont have the stock car it's prolly a bad idea. apexi's power fc also, its a plug in unit.



thats all i'm thinking of at the moment

CustomEngr

looks like Megasquirt has really upped their quality and capabilities, and you can't beat their prices at all. looks like I can get the whole package for around 600$, ECU, sensors, cables, harness, and all for both fuel and ignition control.



So you are saying replace the twin HT-12's, with a single? Which manifold for this? What is your recommendation for both?

j9fd3s

the dual ht-12's CAN do 300hp, but they generate a lot of heat. a single t04 will be a lot easier on the engine.



there are plenty of manifold choices out there, HKS, GReddy, etc etc

CustomEngr

I couldn't find the GReddy manifold, although they have a turbo upgrade kit for the HT-12s. But Jesus, 1000$ for an HKS header?? Is there anything reasonable out there?



And from what I gather, the stock intake will suffice for 300hp, as the limiting choke point is the ports.



Also, am I correct in that if I use an ECU controlled coil pack, I can have the plugs fire simultaneously? What are the pros/cons of this? (In stock form one fires first, then the second, correct?)

Nateb123

Mazda has the timing between the two plugs optimized for a complete burn. The leading (lower) plug creates all the power because it fires close to TDC, so the only place for the explosion to go is through the relatively small dish in the rotor or push the rotor itself. The trailing (top) plug fires and burns off the rest of the gas mix (well, as much as it can) once the rotor is past TDC and the whole rotor face isn't split into two combustion chambers connected by the rotor dish. Making both plugs fire together at TDC would mean the force of the explosions on either side of the rotor will be equal, making a net force 0. Not good. If you tried to make them fire together after TDC, the combustion chamber would be expanding and the rotor would get MUCH less push.

j9fd3s

http://cgi.ebay.com/ebaymotors/HKS-TURBO-E...sQ5fAccessories



that is list price for that manifold, any hks dealer can do that price. better yet plenty floating around used too



for 300hp neither the ports or the intake are a limit, there are people making 500+ hp on stock ports and intakes.