Yesterday, Ralph and I put my car on his dyno. While the car made some impressive numbers, we beleive the numbers are'nt correct. We beleive there is to much power for the amount of boost I was running. So please take the dyno numbers with a grain of salt. Ralph later found (Saterday morning.) out this was due to the dyno's/computers weather station thingy being broken. Ralph figured it was probably broken during one of the moves. (I'm shure Ralph can tell you about it better than me. ) I'm not shure if this just makes these numbers uncorrected or what, but I'm just tyring to be perfectly honest.

Anyways, Ralph played with the timing, leaned out the idle, leaned out vacuum numbers, and did a couple other things before we started WOT runs. Once Ralph striaghtend out my screwy map the car made a somewhat questionable 407rwhp@7000/331.4rwtq@6000. While these numbers don't sound out of range for a healthy sized single turbo...the boost level did. We acheived these numbers at 12.5psi! So now you guys know why we're sceptical. Ralph said we could tune for higher boost, but I did'nt want to. The motor has nearly 50k miles on it, and I feel like it would be just pulling the pin. After those runs, we started tweaking the boost controler. After a couple different routing configureations, we decided that the Profec B is nothing but a POS. So we decided just to let the wastegate spring do all the work resulting in a slower spool & less bottom end.

On the way home I was keeping an eye on the injector duty cycle numbers. They where anywhere from 74-77% Now if you plug those numbers into Maxcoopers fuel calculator, it's telling me that its a 400+rwhp car.

Here is a rundown of what I have done to my car.

SR stage 2 turbo
XS cast manifold
50mm HKS wastegate
Greedy Type R BOV
m2 style IC
Removed double throttle
Ported GZ LIM
850 and 1300cc injectors
HI-6 ignition
3" DP, MP, and a Apexi N1 dual tip
Power FC, commander & Datalogit
LM-1 wideband
10s in leading and trailing
No boost controler.

When Ralph found out that the numbers where'nt correct he called me and let me know, and we setup anouther dyno appointment for next Sateday.

Anyways, in a couple minutes I'll post the dyno sheet. CJ

 

Dang it! I don't have a resizing program on my new computer! Anyone want to resize a image for me? CJ

 

ill do it send it to mlara@antelecom.net

 

Well, I did it...but its way to small now. But I'll send it to you anyway.

 

better???

 

A before sheet would be nice too though...

Just wanted to see the difference.

 

nice numbers!

 

Didn't ernie claim 400 hp at 10lbs with the same turbo? And that was w/o the GZ LIM, stock motor

 

200lbs of torque at 3K on a 13b with a single? Could the numbers be off that much? I wouldn't think this manifold could make that much differance in the low range can it?

 

man those graphs are so smooth they really don't even look real. Did you guys hand draw those haha just kidding

 

I have a old dyno sheet on my other computer. I'll post it later. I'll admit, bottom end is much better on the old dyno graph. Ralph was saying this was because of a lack of a boost controler with the new runs.

I also wanted to say that the difference between my tuning and Ralphs tuning is just like night and day. After Ralph made his adjustments, and after he did his tuning, the car was totally different. The driveability is 100% better than I could have ever done. Its just amazing. I highly recommend getting a profesional tuner to do the major tuning. And if you're in the NW, I'd go to Ralph. He's freakin' awesome. Anyways, sorry for my ramblings. CJ

 

yeah the boost controller will allow the wastegate to stay all the way closed for longer than just running it off the spring...so more exhaust will be going to your turbo. Running strictly off the spring has the wastegate crack open way earlier than anywhere near the actually spring rate

 

Just to let everbody know the dyno was reading wrong. We moved the dyno and
broke the weather station, so the correction factors were high, 1.26 SAE to be exact. So we are going to redyno next saturday wiyh the right correction factors
to get accurate results. Most fo the correction factors I have seen are like .9 to
1.1 max so these results are quite high.
The car runs hard and pulls really well but the true performance is in CJs ***!!!!!!!!

Ralph Sorry for the weird results, I will fix and be back.

 

whoa dude, waay to much info

j/k congrats on getting it up and running, sounds promising.

 

Those are mustang numbers. Thats about 485 dynojet! Does sound quite high. We must be doing things in parralel, cause I got a rough tune/dyno in today with my GZ mani. Made 376rwhp on a mustang Dyno, which is around 425 dynojet at 16lbs. Had very consevative timing and AFR's and lifted at 6800rpm, so their is plenty of room to grow. The EGT's between front and rear rotors were exactally the same, so the flow is well balanced.

 

Hey Radkins , does your motor seem smoother? I thought it was in my head on my
RX7, but CJ thinks the same.I am going to dyno the GT42R again with a new clutch and the LIM, but this time we are using 2X850s & 4X1600s and boost to 30psi, hopefully the egts are equal still at high boost. Ralph

 

Does anyone have a before and after dyno with the LIM?

-Alex

 

I do have a before dyno sheet, but none after installation of the LIM becuase Ralph talked me into sumping the tank, running an external pump, and totally reengineering the fuel system. Thanks Ralph for costing me another 800 bucks!

 

For a valid comparison, we need before and after tests with the exact same engine setup (exept LIMs),same AFRs, same boost, and similar weather conditions.

Otherwise it is just all hot air. Looks like we still will not have it.

 

Here is one of the old runs. We where running 16+psi on low lead 100. I realy need to get a boost controler now. Much better bottom end in this run.

Chuck, we know that the only real way to get solid numbers was to do a back to back....but to be honest, it would be to much work for me. I was just relating my experience with it. While these numbers are way over inflated, It was interesting to see that my car made peak hp/tq up higher now. CJ

 

how much is 436 on a mustang dyno?

 

We probably should not have shown any dyno charts becauuse the sae correction
which is automaticlly calculated off the weather station was damaged in moving.
I will fix the weather station and will be running CJs car saturday with the correct
SAE calulation which will be a straight across comparrison on the same car with
the same AFR etc. Ralph

 

Yeah we probably should'nt have...but o-well.

Ralph I'll return your phone if you promise 500rwhp. You guys ever find it? CJ

 

On a side note, everyone is wrapped up on HP numbers, understandable. How about the balanced EGT readings?

 

I agree. Truthfully I do not think power will be that much different but the true gain is balanced power between the two rotors which will reduce harmonics and e-shaft strain, and help reduce detonation due to balanced AFRs and EGTs.