RKD in OKC

Oh man, I completely forgot you were the one that stole that turbo from me, LOL.

Good to hear you got it plumbed up and running.

On my motor it was happier with a nice flat fuel curve, but I had a cobbled together setup with Autothority 30C MAF, LR chips, and MafterBurner. With the LR non-MAF chips I had to use an adjustable fuel pressure regulator and 48# injectors to get 4.7 volts max from the MAF to the Chips at full throttle max airflow for the chip to think the motor was under load and advance the timing. Made quite a difference in power, but moreso the time to get to red line. Adjusting that max voltage and keeping the same AFRs dropped a 2500rpm to red line run from 12 seconds to only 6! And that was with 600lbs of driver and laptop tweaking passenger on board.

caster951

Mike, what size injectors are you running?

fast951

I hate to tell you, obviously he didn't know what he was doing. How did he advance timing? Is your SMT hoocked up to alter timing?

toddk911

What voltage was it reading before when it took 12 secs to redline?

special tool

What he did was add 2 degrees to his laptop - the 951's timing remained unaltered.

RKD in OKC

4.1v, dropping the fuel pressure allowed me to richen with the MafterBurner bumping the max voltage up going to the chips.

fwb42

Mike, You might want to take you car to Steinel's Autoworks,2002 Midway Dr. Twinsburg,Oh. (330)425-8582. They built and tuned my son-in-laws car and it runs great!! Many mods,that they did,turbo,head work and more. Check their web suite.. FRED

JarmoL

Well that is most interesting. I have a Vitesse MAF/chip and a Mafterburner in my 2.8. The MAX voltage at full throttle is 3.8V. Does it mean I am missing some of the potential of my engine because of that? Someone care to explain it to me?

Jarmo

Mike1982

Fred, that is where I go to get work done but they don't have a dyno. I am going to do some data logging for John to look at and hopefully find some missing power. The car is quick, but not as fast as I thought it would be after this turbo in there, so we will see. I will keep everyone posted on here.

RKD in OKC

Depends on the chips.

Duke

What other mods do you have? Except for the Vitesse MAF and chip combo I assume you have.

RKD>> what mods did you have at those dyno runs?

IMHO this is a very good thread to show how much the numbers can differ between different dyno's...

nodestination1

I haven't dyno'd the 951 yet, but I did a dynojet run and a mustang run with my old TT 300zx.

With the same mods, roughly same conditions, it put down:

Dynojet - 444whp, 443ft lbs.

Mustang - 389whp, 386ft lbs.

So from my experience, there is a sizeable difference. Around 50hp.

But then again, when you're in the 400 range, you're losing a lot through the drivetrain.

Jeremy Himsel

Not really. It means that your MAF can support more air flow and is not maxed out. If your A/F ratio's are on target then you shouldn't need to adjust.

Mike1982

I have:
Super 61 dry turbo Lindsey
Tial 38 MM WG
MBC/Lindsey black ****
Fabspeed 3" cat bypass pipe
Muffler with most of baffels removed
55lb Injectors
3 bar fuel reg.
Vitesse MAF
Vitesse SMT-6 piggyback/chips
Wrapped header, downpipe, intake pipe on exhaust, turbo

I think that is about it, as well as the normal maintence done like vacuum lines, plugs, wires, cap/rotor, water pump, all new coolant lines, etc.

toddk911

So you want to have the closest to 5.0v as possible in the upper ranges?