TwinTurbo93

OK, I finaly had my car tunned yesterday by Tony @ T&R Racing (many of the locals know him for the amazing work he does) which turned out great results.

I realy wanted to hit 380 RWHP more and less but Tony didn't agree with me on that one, and advised me to keep my boost at 12 psi max for 2 reasons:
1- Bad boost controler (HD valve) that spiked the boost to 14-15 psi at times, &
2- Stock injectors.

So we left the boost @ 10-11 psi because we couln't control the boost spike.

The numbers were:
@ 5psi - 251.XX RWHP
@ 10-11 psi with boost spikes to 14-15psi
301.49 RWHP
307.91 RWHP
311.XX RWHP

The first & last dyno slips we forgot to print, I guess I was pretty happy w/the results and dind't look what I took w/me till I came home, but I will pick them up next time I drive by the shop, b/c the last one is the more important one, I will post it here again.

My H20/Alc. injection was off, I didn't want to tune with it on, since that is just a Deto. prevention device and will not do any help on low boost anyway.

The main thing I need to get in near future is a good elec. B/C, crank the boost to 14psi and than use the h20/alc. inj., will see how many HP that will add...

For the work I recently did in my car click here and for the mod list hit the link in my sig.

On the second slip it looks like an ignition brake-up of some sort but there was a signal problem with the dynometer.

All comments welcome.

RX7UP

Great start.... Cant wait to see the numbers go up once you install the electronic boost controller and the bigger injectors... Overall good progress.... I'll give you an (A) for all your efforts....

Keep up the good work and keep us posted on the progress!

rynberg

How were those AFRs measured, because they are leaner than I would be comfortable with on my car.

TwinTurbo93

Thank you my brazhha...

Honestly I don't know exactly how he mesuared the AFR's, I know there was a little tube in the exhaust, a wire connected on the motor area to the dyno comp. that's it.

You think 12 is a little lean?
As you can see @ 7K rpm is going lower, closer to 11.5, I beleive it's pretty safe , I don't push my car like that all the time, especialy in hot weather like this, + I'm gonna use the h20/alc. inj. so it will be even safer.

rynberg

I would think a tailpipe sniffer would read a little leaner than a sensor placed before the cat, but yeah, 12:1 is a little lean. 11.5:1 would be safer, especially at your torque peak.

Pretty good numbers though for your mods, they probably wouldn't drop much running slightly richer. You need a midpipe for that non-sequential setup...

RX7UP

John is running the Apexi RX6B single Turbo....

G's 3rd Gen

iTrader: (11)

upgrade your fuel and let that puppy breath!!

Montego

iTrader: (1)

dayum!!! @ 5psi 251.XX RWHP

I dynoed at 189 RWHP at 6 psi... I guess single turbos really make that much of a difference.

TwinTurbo93

That's exactly what I said to when I saw the dyno result.
Yeah, the single is doing it's job very well, + the huge FMIC is helping the proces alot aswell.

2FAST7S

it is a wide band O2 sensor! I thought the same thing but without a cat i doubt it makes much of a difference. Ovbiously enough with his stock fuel system and the RX6 its gonna be pretty hard to keep it rich! I'm assuming he's running more fuel preasure since hes got a fpr. But seriously invest on a set of secondaries and then get the b/c...pointless without more fuel!!

that said, good numbers for the stock injectors! Just like me searching for more boost!

TwinTurbo93

Yeah I'm gonna keep the boost @ 10-12psi max till I upgrade my injectors, better safe than sorry, also I bumped the fuel pressure to 50psi and I kept looking at the gauge while under boost the pressure went up a bit and stayd there real steady till 8K rpm .

cripsR6

Will you be making some passes this Sunday, or what?

1QWIK7

iTrader: (33)

congrats jon, i knew all that hardwork paid off

TwinTurbo93

Maybe, not sure though, my diff. is pretty weak and afraid to bust that sucka, I ordered the brace but it didn't arrive yet, don't want to get stuck 2-3h away from my house.


Thanks man, I must say, yeah it paid off, just as long as she keeps working fine now...

2MCHPWR

iTrader: (2)

that is good. i set my fuel pressure to 56 and on the dyno, it nosed dived to 45psi. turned out the voltage reaching the pump was only 10.9 at WOT near 6000 RPM. so i re-wired it directly from the battery using relay and a fuse. now its 14.1 volts and pressure is steady at 56 psi. My crappy stock wires weren't able to keep up; all should check like you did.

so have you been to the track yet? best ET and mph?

TwinTurbo93

Are you still using the stock pump?
I'm using a walbro 255lph ,which should flow a little better than the stocker, but the wiring is still the same, that's a good thing what u did, but wiring it directly keeps the pump running on high voltage full time which causes the rotary to run a little rich on idle (not on your case)

Stock fuel delivery system works in 2 fazes, usualy on idle and low rpm the pump runs on something like 9V and once the RPM's rise it swithces to high votlage 14+v .
What ECU are you using? I'm not sure on this but the voltage switchover might be caused by the ECU not switching to high V. thus droping the fuel pressure on higher RPM.


Attempted 3 times, first one, was so hot that you can fry an egg on the asphalt and decided not to run, afraid from blowing my motor on 100+*F , second attemp I got rained out, track closed, and third attemp, past sunday, made it like 15 min. late, track was already full
I was furious all day, I wanted to see how I will do with my new turbo and the new mods, last years ET's were low 13's with the twins running non-seq. intake and exhaust @ 12psi spiking to 14-15.

2MCHPWR

iTrader: (2)

yeah, i use the 255 also. 1/2 lines. adjustable FPR mounted near the tank.
if i hit atco over the winter, i'll post up to see if others wanna go too.
we gotta see what these things can do in a straight line

TwinTurbo93

I'm down brotha, le'me know when...

jacobcartmill

iTrader: (6)

i know this is an old thread, but it looks like you're flirting with disaster there in the midrange, TwinTurbo93...

i'd get that down to the 12's in the midrange and bump it down to the mid-high 11's in the upper RPMs. maybe just some food for thought?

i'd say you're right on the edge, but i guess thats where you make the most power