Braineack

iTrader: (62)

I like the dip before the variable timing kicks in

magnamx-5

iTrader: (7)

yeah comeon Andy you know you want to spray it's fun who knows you might even ditch your fmic when you see how well it works. BTW it is alot cheaper than a hydra. and easier to install

hustler

iTrader: (6)

lightness for the win. The miat is also substantially cheaper, and less likely to be stolen.

bripab007

Yeah, I think BRP had tuned that out a while after they made that dyno chart...they may have even lowered the VTEC high-RPM cam onset point as well, from what I recall.

F20turbo

naw, its leaded. I dont run a cat though

F20turbo

Water injection doesnt make it possible to make 350whp though. I need a stabdalone to do that my good friend.

devin mac

iTrader: (2)

amen. megaquirt for the win. nice kill andy. though i have to admit that if there was a boosted miata sitting next to a boosted s2k and someone said, "grab whichever ya like..." i might jump in the honda and peel away... ;-)

cccpull

If I ever get to a dyno I'll see what the OEM ECU can or can't do.
What do you consider the obstacle that only an aftermarket ecu can handle for higher horsepower?
If push comes to shove, I can always hook up the

devin mac

iTrader: (2)

my guess would be adequate fuel delivery with reasonable idle. However, that said, i know of a neon guy thatw as making nearly 500 fwhp with a stock ecu and rising rate setup, so taht might not really be a real barrier... andy?

cccpull

I'm running RC650cc injectors with a Walbo 255 lph at a constant 80 psi (non- return fuel system, '99) with a decent 900-950 rpm idle.
So that shouldn't be my problem.

bripab007

Altering the OEM ECU's fuel injector signals can only get you so much extra headroom, and your control will never be as precise. The timing is of even greater concern, as the more power you're pushing, the more precise and accurate you'll want the timing advance/retard to be.

cccpull

I agree with you in that if might/will be more precise timing/fuel, butyou can only run so much timing and dump so much fuel into the engiine.

Since I'm running 650's I don't see the need for more fuel headroom.

magnamx-5

iTrader: (7)

How do you run 650cc injectors on stock ecu . I would love to do that.
Andy comeon you only need fuel spark and compression if you could tune some 400's with the rx7 to run with the pieburg and run some WI your temps should be down and given the 120+ psi of the peiburg. with the extra fuel of the methanol you might be able to make it work plus your effective octane ratting at the higher boost level's almost like what you run with race gas. so you could run you normal 93 and then spray when the IC and fuel effeciencys start to fall of as a supplement.

cccpull

Not necessarilly stock, OEM ECU clocked for 7800 rpm redline and the old piggyback HKS S-AFR fuel controller that I've had in the car for several years.

Believe me I was going to go with an aftermarket ecu when I installed the RC650's and to my surprise the HKS was able to make them idle.

m2cupcar

iTrader: (5)

that's just cool

F20turbo

That is true, I agree. But its so much easier and safe to not run FP that high. Even though I have got away with it for years and years I need to move onto a system like the Hydra that can make 350whp without even breaking a sweat ( on 110 )

magnamx-5

iTrader: (7)

You will be bored with such a safe setup but maybe a little 350 whp on 93 octane boredom is what you realy need that would put you at 5.9-1 lbs/hp Heck you might even beat crashes miata with that. At least you an some others have given me a way to go for awhile i thought i was stuck at 230's and then i read about you and mimi miata or whoever running 300+cc injectors with the rx7. Thanks for going as far as you did with the stock ecu who knows maybe on day i'll see if more can be had on stock ecu. but that will be a ways down the raod are you going to the autocross at papahjhons stadium in a few weeks? I was thinking of going, never been sounds like fun.