Gen2

iTrader: (3)

Just wondering if anyone ever achieved about 350whp using a stock ECU, with a piggyback.

Im looking for some info, like what kinda turbo was used, injector size, boost levels, a/f ratio, dyno graphs, and which piggyback system? also how realiable was this setup, could it ever get properly tuned to achieve a desirable A/f ratio?

thanks guys!

13bpower

Yikes, that is a big order. It's probably possible, but of corse it won't run good. It would have a big stumble when the secondaries came on. A piggyback just isn't advanced enough to smooth that transition out. A/F ratio tunning might be a challenge.

720 primaries
1600 secodaries
To4
15psi
FMIC

gsracer

I believe it has been done before. It wouldn't surprise me if some of the e-manage guys (dale....anyone else?) managed to put down 350rwhp. It's a little more complicated of a band aid than a safc though.

Digi7ech

iTrader: (1)

It is probably possible but it wouldn't run as well as an aftermarket would.

Since your going to be running a FCD and will need to manipulate the fuel. A street port/BP and a bigger turbo would get you there.

$150FC

why spend all the money on the electronics you'd need when you could probably spend less and get a standalone?

LT8TurboII

iTrader: (2)

Possible, of course. Easy, reliable, reccommended.......

Gen2

iTrader: (3)

im not really looking into buying all these little electronic band-aids in place of an EMS. im just looking for the right combination of items, along with a stock ECU that will net somewhere around 350whp. along with reliability.

jreynish

iTrader: (2)

can't be done without anything else to control fuel, Or by getting your ECU reprogrammed with that kind of potential in mind. The stock computer does not have maps for anything above ~9psi! There is no timming map nor is there a fuel map above that either! It can't be done!

scathcart

Nitrous oxide... No effect on stock ECU.

Everyone keeps making these statements about the fuel maps. Can anyone give me proof that fuel maps are effected by boost signal? I have only seen analysis which states that an FCD only affects the timing retard, not fuelling.

Gen2

iTrader: (3)

well ok, reprogrammed stock ECU is within the region. Let me rephrase my ques.

is it possible making 350whp without a full EMS.??

SideWindeRx7

lol .. 350rwhp wont be hard ... ****, jerkracer was running what 330 on a bnr upgraded turbo ... buy some 850cc secondaries, get a s-afc, port the motor (just do it!!), upgrade the turbo, and get a front mount. BAM...

hell in all honesty, you could get a front mount, upgrade the turbo, bigger injectors and a s-afc. That would get you there.

As for boosting past 9psi.. i boosted 15 psi for quite awhile.. i dont recommend past 11 though.. but it ran fine on 15 psi with no real fuel mods

jreynish

iTrader: (2)

scathcart don't you have to add more fuel to compensate for the N20? I mean the stock computer wouldn't know, you would have to have some way to compensate? Am I wrong?

scathcart

Wet kit just injects it completely bypassing the stock injectors. Has no effect on running condition of the ECU. The rules are stock ECU, not stock fuel system.

Ryde _Or_Die

There is an upgraded ECU for like $90 now that gets rid of fuel cut and I would think it would be better for this application than the standard FCD. An S-AFC with 720 primaries/850 secondaries or even all 850s should work I think. Will help with the transition. A T04, fmic and fuel pump should be able to get you there I think.

j9fd3s

iTrader: (3)

http://my.engr.ucdavis.edu/~pko/OldSetup.html

Donn Hecht

Sorry to tell you this, but it aint goona happen.
well at least not reliably. Do it right the first time go with a real EMS.

Donn Hecht

Reliably Hell No ! ! !

scathcart

I'm going to have to disagree.
E-manage could handle it quite easily and be just as reliable as any other EMS. S-AFC would come close as well.

jreynish

iTrader: (2)

I agree with Scathcart, the E-manage is very powerful when wired in properly! It could handle that much power easily. The safc would do it also but not at the same efficiency!

scathcart

Yeah, it wouldn't make as much power. Stock timing maps.

Donn Hecht

Well ok for the exception of the E Manage yes I also agree, but the S-AFC its still limited

silverrotor

iTrader: (1)

It's very possible...a good friend of mine Is running over 400 hp with a stock ecu.

Car:
1988 Mazda RX-7 (full race prep.)
Built in 2000


Performance:
Fastest E.T. 10.61 @ 132mph - 60ft of 1.61 (STOCK COMPUTER & GEARBOX)
Dyno results: Tuned at 426 hp - 353 torque at the wheels (21 psi boost)


Car Shows and Rewards:
Runner up Import Drag Class - Speedorama 2000
Feature write up Performance Auto & Sound (December 2000) www.pasmag.com
1st Import Drag Class - Speedorama 2001
Runner Up Mazda Class - Speedorama 2001
Best of Show Engine - Speedorama 2001
Runner Up Mazda Wild - Performance World 2001
Feature Model Booth - Darknights 2001
Runner Up Mazda Class - Performance World 2002
Feature car - Canadian Auto Show 2002

Qualify in the Quick-8 every event taken to - have done a personal best every event.

Media: Performance Auto & Sound (pasmag.com), Sport Compact National, Inside Track, Racemode.com, TorontoImports.com, PureImports.com & TorontoSteetRacing.com.


Car Modifications:
Body - Fully Lightened

Motor - 13B 4 port, street port+, 3mm racing seals, 8L fuel cell, Bosch Electric fuel pump, Paxton fuel filter, 4" wide racing intercooler, T68 equivalent race prep Turbo, 3.5" down pipe, Turbonetics race gate, runs off stock computer with a SDS fuel injector controller, runs 8 injectors, two MSD ignition amp + blaster coils, Greddy Profec boost controler, line lock.

Gauges - custom aluminum dash with all Autometer gauges

Interior - S-Line 3" 5pt racing harness, Momo racing seat, Momo Apache steering wheel and a 6pt certifed roll cage.

Suspension & Driveline - stock rebuilt 5 speed gearbox, ACT race clutch and pressure plate, final drive 4.11(stock), custom built coilovers height adjustable front & rear with B+G Suspension race springs, rebound adjustable rear Koni, Brembo slotted rotors w/ carbon fiber pads, 15" ROH Sniper wheels, new Potenza tires front, Goodyear Eagle drag slicks rear.

Exterior - APR Performance custom aluminum drag wing, fiberglass front lip.

silverrotor

iTrader: (1)

scathcart

Its only limited only on timing and mximum injector size.
You could compensate by adding MSD boxes and then setting your timing with an MSD pc-programmable unit.

You could also use a RRFPR with decent results, an steady-set FMU if your fuel pump can handle it, or an additional injector controller. All would be very reliable and meet the goal.

silverrotor

iTrader: (1)

I'm abit surprised that Kurts track prepped 7 Is not getting more attention. Considering It's running on a stock ECU. 426hp Isn't good enough?