Well guys, its been a long and expensive 7 months since I first started my single conversion. And today, is the day I go for some low boost dyno tuning. I must admit, I'm a bit nervous. The reason why we're going to keep the boost low is because, of the age of the motor. I'd hate to grenade the motor, and take out the turbo too. So, I'm guessing we'll just keep it around the 10-11psi range until a new motor can be built. My mods are,

48k miles on stock engine
SR stage II
XS cast manifold
HKS 50mm Wastegate
3" down pipe
Non resonated 3" mid pipe
Apexi N1 dual tip
GroundZero motorsports fuel pump
850cc primarys, 1300cc secondarys
Power FC
Profec B
Spyfish IC (M2 medium)
Greedy Type R BOV(This is where the real power comes from!)
HI-6
9s in leading and trailing
lots of race gas.

Ralph Friend of Groundzero motorsports is going to be doing the tuning on my car. I'm hoping for around 330rwhp@10-11psi, but would be happy with 300.

What does everyone think it will make?

I'll keep everyone updated on what happens. Even if she lets go on the dyno.

CJ

 

I think you should make way more than 300. Up word to 340. Just other parts (w/o turbo) on stock twin, you should do around 310 already, right?

POM HB

 

330 rwhp should be easy to get GL

 

So whats the verdict???

 

lookin forward to it

 

ErnieT made over 360RWHP @ 10psi with the SR Stage II on a stock motor/stock ignition. I would think your car should be up there too. Whats the results? Did Ralph get you to go 20 PSI?

 

Sorry for the lack of a update. There was lots of problems with lots of different stuff. But I'd like to thank Ralph and Brian for spending so much time on my car. They did an awesome job with what they had to work with.

First of all, we get the car strapped down onto the dyno, Ralph loads a map. First order of business was the idle, and smooth low end acceleration. No matter what we tweak, the car will not idle any leaner than 11.5~11.7 a/f ratio. I did'nt put a fitting on the fuel line when building they fuel system. (My stupid fault.) So there is'nt a way of checking it fuel pressure. Our best guess is that the fuel pump is over running the stock fuel pressure regulator. Then we start tuning for low boost. Starting with 25-35mph runs in 3rd gear. Then working our way up to like 35-55mph runs. At this point, we start noticing my supposed 10psi wastegate spring is'nt working correctly. Its actually a 14psi spring. (I have the yellow spring in their...and a purple on the shelf in the garage...so I'm going to dissasemble this thing this week and check it out.) So we finish with low boost/no boost controler tuning. We fire up the Profec B, and start to do some tweaking. No matter what we do, it wont react to the adjustments. Ok, I screwed up again, and hooked the wastegate on wrong. Ralph/Brian fix that, and we start with some *mild* boost settings. We turn the boost controler up a couple clicks. I'mdriving the car, and Ralph standing next to it, while Brian is hanging back checking out the A/F ratio, boost ect. I floor it at about 30mph in 3rd gear, boost starts to build, motor is just pulling hard, and sounding awesome! Looking back at the boost levels, I was at 10psi around 3,700ish, Brain said it was around 15psi at 4k. Between 4 and 5k rpms it whent from 15ish psi, to freakin' 27lbs! Ralph and Brain did'nt even have time to wave me off, turn around or nothing. Motor whent POP, and let out a terriable cloud of black smoke. Ralphs first worlds where something along the lines of "This is one "F"ing turbo!" Brians like all "Did you see that?! 27lbs by 5krpms!" They're like stoked, and I'm depressed as of right now.... I'm like, did the motor let go? Ralphs all like naaa, it was realy rich. Then he tells me to start it up. The car fired right up, and I could'nt beleive it. So, we shut the car off, and Ralph calls Ari@Rotary Performance. He tells us to run it like a internal wastegate, how to hook it up, and what little switches to turn up and down. I'd realy like to thank Ari for taking the time to help us out. I did'nt even buy the boost controler from him, but he helped us out anyways. After we get the boost controler all squared away, we start doing some runs. Low boost the car put down 340rwhp@6500rpms, and 288.5rwftlbs@6000rpms. I thought this was a little low for what boost we where running, but you have to remember this is on a Mustang dyno, not a dyno jet. You can add about 10% more power for dynojet. On high boost wich is about 16psi it put down 392rwhp@6500rpms, and 330.9rwftlbs@5,500. This was with very concervitive timing, and a a/f ratio of 11.0-11.2. The boost controler was'nt doing a very good job of holding boost steady. It would first overshoot the boost level we wanted, then come back down to the desired boost level, then fall off, high in the RPMs. You'll see on the dyno sheets, and the torque curves. We did'nt have time to finish up the middle cells and stuff, so I'm going to give Ralph a call and we're going to do some fine tuning to it. In the mean time, I'm going to add a fuel pressure nipple, FIX A TEAR IN A INTERCOOLER COUPLING, that was around 1.5" long, that I did'nt know I had, and play around with some other odds and ends.

To be honest, this car is scary fast now. I can't even imagine running any more power than this. There where a couple times on the dyno, when the car actually was blowing the tires off in the top of 3rd gear! If you just nail the throttle in 1st and 2nd gear, all it does is spin the tires. It does'nt even accelerate.....it just spins the tires. I have'nt had a chance to do any 3rd gear runs....but I'm going to wait until we have a chance to finish up everything. Well that and some realy open roads.

Something else I forgot to mention, this was all done on the stock clutch with 48k miles on it!

CJ

I'll try uploading the images.

 

Congrats CJ, you must be pretty happy despite all the problems. I am sure there is some more power to pick up there too with the tear in the intercooler coupler and what not. I new Ralph would turn it up more than just 10 psi What did Ralph think of the turbo? No stains in your pants from the 27 psi adventure?

 

Low boost.

 

High boost. Maybe Xcessive/Ralph the man will jump in and say something about our 27psi adventure! CJ

 

CJ, do you like my old turbo?

I can't wait to get my car up and running with my new setup.

 

Ralph said that you could tell this is one big turbo. He also said we were'nt even starting to touch where it wants to realy run. I think he said something along the lines of 20+psi area the turbo would probably realy come alive.

Stains? I had to change my pants afterwords! When I make anouther appointment to do the fine tuning, I'm going to take a couple of video's, and post them for everyone to see.

The -6 oil feed, with a -10 return line seems to work great. There was no oil blow by or anything like that. So, I guess this will end the oil restrictor debate for the stage II.

Something else I'm going to work on is a resonated mid pipe. With the n1 dual tip, and a straight through mid pipe, the car was a hair loud on the dyno.

Overall I'm realy happy with the car, but I would realy like to be able to run 10psi on the street (fix wastegate), throw a resonated mid pipe on the car, put alot more rubber under neath the car, and start on the paint job next. CJ

 

That certainly kicks my Stage I's ***

 

18-22 is the sweet spot. anything over 22 is overdoing it.

 

Nice numbers!

I'm also running a AN-6 oilfeed line on my Holset HX-50 and it works gret, these turbos needs alot of oil...

I wonder how my HX-50 would perform on a dyno, I think I will have to figure that out soon

 

Well, I'll post the final tune dyno sheets this weekend. My yellow wastegate spring is suppose to be a 10lb spring, but is just a fraction softer than my 14.7lb purple spring I have laying around. I was thinking about doing some modifications with a torch, to my purple spring to make it a little softer.

CJ

 

Be careful with that. You know how easy it is do screw up a spring doing that right? I used to see guys doing that with suspension springs. Same thing here. I'm not the expert that some others on here are, but I would say that's a very bad idea. Just my .02 though.

Zach

 

Nice numbers CJ! Glad you didn't pop your engine We got to hook up sometime, like to see what your car looks like and what it can do! Later, James

 

May be the 27psi came from that "greedy" bov

 

Hey James, how did your car run at the track? I was thinking about heading down there on saterday to get kicked out. My car realy is'nt that pretty. Looks stock except for the n1 dual tip.

Now the plan is head up to Groundzero on friday. Hopefully, I'll have some numbers to give you guys in the evening. Regardless, it'll be nice to have a running driving car again. CJ

 

After looking at the http://www.catenet.net/dyno.php dyno page, I've noticed for being a fairly healthy sized turbo, my car spools like a non-seq car! Even when comparing my mustang dyno results against dynojet numbers. Someday I'll have to get some dynojet numbers for braging rights. CJ

 

I got only two runs in and then went home because the place was pretty packed. My first run I bogged first gear and got 14.3 at 109. My second run I did pretty good on my fisrt gear and got 13.6 at 106. That was my first time launching the car, so if I practice I should get pretty good numbers.
My car had a lot of problems when I tuned mine also. I'm going on my third tuning Hope everything goes when! Let us know! Later, James

 

Congrats on the numbers. I had a similar setup as you except I had 550 primaries, 1600 secondaries. Stock motor and stock igniton. I made 372rwhp at 10psi. I never dynoed any higher as Demetrios and I always tuned on the street. Safer that way. At 20 psi with race gas, that turbo really wakes up. I ran a best of a 10.7 with that setup. You will need larger secondaries if you plan on running 20 psi. BTW....this turbo is very unrealiable. I don't recommend it. It blowns oil seals for lunch.

 

Ohh great...now I start hearing the bad news. Well, the max I drive the car is 2k miles a year, so If I can get 3-4yrs I'll be happy. CJ

BTW, how long on average did your oil seals hold up?

 

Yeah, I got away from the sr turbo because of seal
chomping. I put a 62-1 on and it is as good as new
over a year later and 10,000+ miles.I am now going
to a 'secret' spec gt series turbo. I hope you have
better luck with the holset than I did.