Ronny

Well, we`ll see in a couple of weeks, when I have taken my na 6port bp to the dyno. And it`s got a custom intake manifold and a megasquirt running staged injection.. I fired it up last week, and it was idling smooth at 900rpm.

Here`s a pic. You can find more info on it here https://www.nopistons.com/forums/ind...howtopic=34096

Cheers

Ronny

Ronny

one more..

Ronny

last one..

bill shurvinton

Dear me you need to do your research a little better. Bendix developed the initial patent portfolio on EFI and Bosch licensed this and then developed their systems from that base. Working further back, it was an Italian who originally invented the solenoid controlled fuel injector. And where do you get the idea that MS is an 'offshoot' of GM systems. Within a couple of years the MS family will be the ultimate EFI for rotary engines, and I guarantee tha

Drago86

Be careful with that stock flywheel on there...

Drago86

I cannot for th elife of me find that thread, i searched through every thread youve posted,.. did it roll off or something? Are you sure it made less power then a stock motor?

j9fd3s

ok cool. make the metering pump, bac valve, and the 2 emission solenoids work.

injector resolution should be better than .001ms, fully sequential, maybe with a 3 stage staging setup. ignition needs to have enough outputs to run a 20b, with full split. let me use any ignition pickup i want. onboard wideband o2.



or just match the stock rx8 ecu, and make it tuneable

mazdaspeed7

https://www.nopistons.com/forums/index.php?...7&hl=aux+bridge



As for the power thing, the problem was twofold. The ecu would be maxed out by 5500 rpm, and the resulting leaning out killed power. The engine fell on its face above 5500 in higher gears. I could get a little more rpm before power fell off in lower gears, but not much. Second, below that, there were other problems causing it to run like ****. One is the ignition timing. BP's require different timing maps than stock ports, which the stock ecu does not do. Street ports work decently in this regard, but still far from perfect. Also, the manifold was a serious problem. With it set to the long runners(low rpm), I had a surge of power that was about 500 rpm long, from 5000-5500. But above and below that, it pretty much ran like ****. Not even enough power to drive it normally. I set it to the short runners, and it was worse. It never got into the powerband. The car ran like **** from idle to redline.



Im still having the ecu problems(for now) with my ECU. 5500 in 4th is the end of the game. But sometimes I can see 7000 in 1st, and 6500 in 2nd before the power really starts to fall.But I have a very strong midrange with this engine. Even shifting at those rpm's, I stayed within a few car lengths of my friends S2000. Theres plenty of low end to make daily driving no problem, and when you step on it, thr torque just keeps building until the ecu ends the fun.

GMON

mazdaspeed7



How do you think the BP 6P with VDI would work with my Haltech? Do you still feel with this setup that the VDI would make it run like ****? Or was it the lack of tuning ability becuse of the stock EFI?

mazdaspeed7

Ive said it a few times already, but one more time. The runners are way too small in the VDI manifold for even a bolt-on stock port engine. Any sort of bridge will be seriously chocked down by that intake manifold But on top of that, the tuning principle the VDI manifold works off requires a period where the port is fully closed, and high backpressure. Bridgeports have neither. So no, it wont work.



Glad to see youre already planning on a haltech. Youre a step ahead of most people who want to do this. Plan on a custom header and exhaust. None of the off the shelf ones have large enough pipes.



My problem was both the manifold and the stock ECU.