Brad Campbell

iTrader: (19)

Played some more last night. Appears to run out of fuel pump at 5200rpm & 10 pounds. Hoping to get to the dyno saturday (if weather permits) for a baseline. I'll try and get some videos then.

Nitroused383

iTrader: (10)

Definitely take some videos, in case I missed it what did you end up doing for exhaust? You do great work by the way, I'm jealous of the craftsmanship. Get that fuel system upgraded and crank her up next year. I'm eagerly awaiting some results and sounds clips.

Brad Campbell

iTrader: (19)

I did essentially nothing with the exhaust lol... 4" wrapped dump with a vortex insert. I also made a 2.5" emissions pipe fully equipped with a spiral muffler and cat.

Brad Campbell

iTrader: (19)

It's against my better judgment, but I just ordered some fittings to install a bosch 044 inline with the racetronix intank. This should atleast let me max out the 60 pound injectors, and get some proper 6k/+ pulls on the dyno.

Brad Campbell

iTrader: (19)

OK. I finally was able to visit a local dyno dynamics shop yesterday for some baseline runs. In total I made 6 pulls, 4.5 of which it took to get the ramp rate correct. The first and last runs were fairly smooth, but runs in between had massive dips in the curve where the computer was applying the brake too hard. It was a little aggrevating to me that it took essentially 130 dollars to get their dyno setup correctly, but alas the guys there had a good attitude even when I kept insisting there machine was at fault and not my car. Another small annoyance was once all was said and done they had issues/couldn't print the plots, and since the computer was pre-windows I couldn't save any data to the usb stick I brought. I was told they would scan and email, but I'm not holding my breath. At the end of the day I was just looking for a place that could succesfully strap my car down to their dyno, and they did it with a smile. On to the important stuff...

I have found that my setup doesn't seem to like any timing around maximum airflow. I have been unsuccesful in providing any more than 14-14.5 degrees of lead in this area, however I have been playing around with ramping the lead up on the backside. So I essentially run into boost with around 13 degrees and ramp up to 18.5 at 6000rpm. I ended up at an 11.6/7:1 AFR. The final numbers (for what they are worth) were 700lbsft and 650hp. This was at 10 pounds of boost on shell 93 octane.

All in all I was happy at best. I was expecting more horsepower, but was pleased with the torque output. I think 6 pulls took a toll on the br7ef plugs, and I firmly believe that there is some power/torque that was left on the table. I don't feel as my tuning efforts were succesful as the dyno issues didn't give me any real incremental data. A friend came along and took some pictures and videos, which I will probably post on Monday or Tuesday.

-Brad

Adam86

iTrader: (10)

Not too shabby! That is one torquey SOB. I'm sure I missed it somewhere in the thread but what size is your motor?

Brad Campbell

iTrader: (19)

It's an 8.75:1 383.

2000RATA

Those look like good numbers to me. The local Dyno guy here who also runs a Dyno dynamics says pump gas and no meth you won't see 700rwhp. Pump gas + meth kit doable but not easy and will be ran on the ragged edge of disaster if the pump fails.

Brad Campbell

iTrader: (19)

Thanks! 650 on pump was my original goal, but expectations change. I was happy with the numbers. I think 7 something would have made my weekend better lol. The torque values are nothing to be ashamed of. This 75mm billet bullseye turbo is where it's at. I wish I had the plot to post cause the torque is in really early. It is a super fat curve and feels great on the street. I keep thinking I can throw more timing at this setup as it's only at 13 degrees into peak torque, but even one degree more lights up the knock sensors. It doesn't seem right to me to be honest. I have seen setups here with that type of static compression running up around 18 degrees. I guess I need to remember that this turbo comes on really strong and early. I was a tad bit annoyed that the dyno runs didn't provide me the data I was looking for as a tuning tool, and kind of find myself blaming the shop for being a little slow on the uptake. I did pull the plugs today and found trace amounts of peppering on the plugs. I swapped them out for one step hotter after reading the side electrode. I also noticed that they look more on the rich side, perhaps one or two close to fouled. I'm tempted to lean out the mixture and drop some timing, but think it's irresponsible to see 12:1 afr under boost. Any suggestions?

2000RATA

The last car I had dynoed was a pro charged GTO and at 8 psi it would only take 11* timing. Any more it would show KR. We only have 91 octane here.

Brad Campbell

iTrader: (19)

Stock compression?

2000RATA

It had AFR heads with the 7x chambers. Should have been like 9.0 or so. They were for a big bore motor.

2000RATA

That car made 528rwhp. No meth 11*timing then later with a meth kit did 585 rwhp. Still a very conservative tune. Car was an auto on a mustang Dyno.

Brad Campbell

iTrader: (19)

Ok. This timing issue may not be an issue, but it still has me pulling my hair out thinking the company that "built" the engine screwed the po and installed a somewhat stock shortblock. This is suppose to be an 8.75:1 383 according to the build sheet. My timing numbers look a ton like stock ls motors with 10 pounds of boost, and peak torque doesnt align with peak specific airflow, which makes me think I have an issue.

Nitroused383

iTrader: (10)

Do you think it might not be a 383? It's really hard to say what kind of power the car really makes on a different dyno like that. See if you can find a dynojet around? We've got another dyno in our area that all the imports guys go to, its a dynocom, it throws out huge torque numbers and it's 30-50 hp higher than the local dynojet. Are you 100% sure the rpm reading on their dyno was correct? If not it throws torque off alot.

Brad Campbell

iTrader: (19)

My thought was more that the compression was off causing the timing to be low. Obviously save for an inertia dynojet you can sandbag any dyno. The rpm added up. I pulled to 6k and that was right. I thought that the dyno dynamics was typically a low reader. I wish there was a jet closer. My first pull was 749lbsft... all were around 7 something and mid 6hp. Dumb car.

Nitroused383

iTrader: (10)

Is that compressor wheel a lower type pressure wheel? Most wheels of that size seem to be really efficient above 12 lbs and right in the sweet spot 15-16lbs. You may be surprised if you turn it up 5lbs and pickup 150 + hp. 650 rwhp is actually pretty damn stout on 10lbs especially a low compression motor like that. Any idea what uncorrect hp was?

Brad Campbell

iTrader: (19)

As I understand it the billet wheels are more efficient all over. Outside of Wild Bill's actual twin 80 sbf I have not seen any installations like mine. The import and diesel guys have really latched on to the billet technology as it does produce a highly efficient high pressure wheel. The whole dyno experience from this weekend is a waste imo. I paid a total of 206 dollars for no data other than some numbers and a dyno image burned into my brain that doesn't even make sense. I wont post actual company names, but given my location people could probably figure it out. When asked, the technician told me that a setup like mine he would run in the low 12's as far as afr and would expect to see 30 degrees of lead. I should have asked them to unstrap the car then and there, but I was really just using them for the dyno (which they can't even properly use... apparently). I have been in this hobby for my entire life, and it boggles my mind how a bunch of chuckleXucks can make money and keep a business open when they can't even wear clean clothes to work.

That being said I'm tempted to go back to the drawing board. I'm 100% positive that the br7ef is too much plug for me. I have a set br6ef's in the car now, and may go back to the tr5's I have sitting on my shelf. I went a step colder right out of the box, but the reality is my engine is lower than stock compression to begin with. I'm also tempted to drop the gate springs down and start from scratch on ignition tuning. I need to invest in an AEM boost controller anyway.

Brad Campbell

iTrader: (19)

BEP doesn't post any batmowheel maps that I can find. I figure it has to be pretty close if not better than the 76 billet. I attached a map below, but it looks like you are correct. The logs show me in the 80lbs/min area and I'm at around a pr of 1.7. I guess I need more boost, or a bigger turbo.

actually that is just a cast wheel map(thank goodness)

Brad Campbell

iTrader: (19)

I wanted to post up som pictures and videos from this weekends events. I also would like to point out that the dyno shop offered me additional services free of charge.