Dyno'd my PTE 54 trim, tech question too

[VRMAN]

Okay so after a week of sitting in the warehouse at all hours putting in the cams, finding boost leaks, fixing little problems and what not I finally got to the dyno on Saturday. Check my profile for the current modifications.

Anyways, the runs were done with the boost set at 21psi and on a mix of 91 and 110 octane (2/3 110 and 1/3 91)

So I got 3 runs in but on every run the car would make smooth power delivery up until around 5800rpms and then it would buck real hard like it was hitting fuel cut, which it wasn't and they would shut down. Every run it did the same thing right at 5800 or so. So even though I didn't get a full smooth run, I do have some numbers:

Dynojet #s:

Max Horsepower/Torque: 297.9/286.1 @ 5500rpms

Max Horsepower/Torque: 302.6/279.1 @ 5800rpms

Max Horsepower/Torque: 305.0/298.0 @ 5800rpms

So there it is, wish I could have gotten a clean run to redline, I really thing 330-340 could be attainable. These runs were at 21psi, I know this turbo could run 24 or 25 pounds. Even at 21psi, I really didn't even get deep into the power band at all when we had to cut out. I am wondering what would cause that violent buck at 5800rpms? IDC was in the 80%s range and I wasn't overflowing the 2G mas.

Whatever the case, there are some numbers for the seldom used 54trim.

 

[2-0turbo]

80% duty cycle on 780 cc injectors? Sounds like you are running crazy rich and that bucking at 5800 RPM is misfiring--you just can't light off that much fuel.

If you could maintain that torque up until redline (possible depending on what those cams are), that would be around 400 HP at the wheels. That would be pretty respectable.

How have you done your tuning? I'm predicting a lot of black smoke on the dyno, right? With 80% IDC on those injectors, with a fat BSFC of 0.6, you've got enough fuel for 400 HP. The fact you only put out 300 tells me you've got too much fuel.

 

[VRMAN]

Your prediction was correct, black smoke like a motherfukcer.

Here were some readings off the datalogger:
rpm 5718 5843 5937 6062 5906 6187 5937 6343
ipw 87.5 88.2 92.1 95.3 88.2 94.5 83.5 96.0
^miss ^miss

Checked the plugs this morning, they are pretty black. Some of the sddsm guys are thinking maybe the BOV is cracking open while boosting. I have the shitty RFL and I wonder if it is leaking open running in the 20psi area? I don't know. For reference, my cams are basically the same as HKS 264/264s.

I don't know if 400whp is attainable, I was thinking more along the lines of 330-350 properly tuned and more boost.

 

[fwdturbobov1996]

you should deff get 370 hp out of her...

 

[damnslowtsi]

May be a bit off topic, disregard if so but..

What made you choose a 54 trim compressor? From what I 've read they shine in neither flow nor efficiency department. Not bashing or anything just curious.

 

[RavenX]

Something is holding you back from getting those numbers. But i agree you should hit 400whp no problem at all. Do you have a wideband at all? That really helps when your tuning. What do use to tune Afc? or something else?

 

[VRMAN]

May be a bit off topic, disregard if so but..

What made you choose a 54 trim compressor? From what I 've read they shine in neither flow nor efficiency department. Not bashing or anything just curious.

To be honest, I think the turbo is capable of good numbers and just wanted to prove the setup worthy. I think the AMS 10 second Galant runs a 54trim as well. Similar to a 50trim though. If it puts down 350whp and a smooth curve then I guess it should be okay huh?

Raven: I tune with an AFC, yes.

 

[AMS Eric #2]

Was the car not being logged with a wideband? Dynoing without one is almost useless and a waste of your money, epsecially if you have fuel control like an AFC.

 

[2-0turbo]

Your prediction was correct, black smoke like a motherfukcer.

Here were some readings off the datalogger:
rpm 5718 5843 5937 6062 5906 6187 5937 6343
ipw 87.5 88.2 92.1 95.3 88.2 94.5 83.5 96.0
^miss ^miss

Checked the plugs this morning, they are pretty black. Some of the sddsm guys are thinking maybe the BOV is cracking open while boosting. I have the shitty RFL and I wonder if it is leaking open running in the 20psi area? I don't know. For reference, my cams are basically the same as HKS 264/264s.

I don't know if 400whp is attainable, I was thinking more along the lines of 330-350 properly tuned and more boost.

You might be cracking your BOV, but the bottom line is you are still adding too much fuel. You might not be able to pull enough out with an SAFC. If you have upped your base fuel pressure, crank it back down to 36 psi and pull fuel out across the board. 15% is a safe number to start with, but you'll probably end up pulling a lot more. In fact, you might run out of adjustment. You might need to find some 650's.

Go do some tuning and report back. If you need injectors, check out Fuel Injector Clinic--they have good prices.

 

[fwdturbobov1996]

Get dsmlink to tune . It does wonders.

 

[Tallen]

Get dsmlink to tune . It does wonders.

Agreed!

 

[red91gst]

What were the A/FR's on the dyno?

If it had a wideband that is.

I agree that its most likely to rich in those upper rpms. What about your ignition? Wires/plugs new? Which plugs? Gapped ok when you pulled them back out?

Nate
SBR

 

[doug]

After you get your A/F issues resolved, the next time on the dyno put another couple of washers into that BOV to help it stay closed a little better. I used to have the TurboXS H34 and I did that on the dyno and it seemed to help some.

 

[VRMAN]

It was being tuned with the wideband. When I pulled the plugs out they were black, pretty fouled up BPR7ES NGKs. I am going to change those asap, put the last two washers in the BOV (currently has 4 out of 6) and check for boost leaks.

I'll probably run 26-27psi on 110 next time and see what I can put down.

 

[2-0turbo]

It was being tuned with the wideband. When I pulled the plugs out they were black, pretty fouled up BPR7ES NGKs. I am going to change those asap, put the last two washers in the BOV (currently has 4 out of 6) and check for boost leaks.

I'll probably run 26-27psi on 110 next time and see what I can put down.

Dude, you're hopeless. Are you trying to put down a big HP number or get your car dialed in and THEN put down a huge number?? Adding more boost is not the solution. In fact, you should probably back it down to 15 psi and get it dialed in and then start incrementing up from there. You need to tune. I'm outta here.

 

[VRMAN]

My last sentence was with the obvious assumption that the upped boost and race gas would ONLY be after everything was dialed in