Well if any of you remember the last time I went to the dyno it was a total waste of time. I had a huge lean spike and I was pretty pissed at myself. I should have gone ahead and bit the bullet and done all of the band aids, but I can be stubborn and was trying to incrementally piece together each piece and just see what it will do. Needless to say, when trying to up the boost on a Greddy go ahead and do injectors, fuel pump, O2 clamp and Bipes and be done with it. [Unless of course you are going with a stand alone or piggy back.]
Anyway... On to today's story. I was at Miata tech day and a couple of the other turbo guys were going across the street to the dyno and I thought I would tag along just to see what their cars would run. We had time for a few extra runs and I wanted to see if the Walbro 190hp, 1.8 injectors, and the new 8:1 disk in the Vortech did the trick. Well suprizingly... I was way rich now, and only about 135rwhp. [Before I started and only had the bipes I was at 145rwhp/145rwtq]
Well... I didn't bring the other disks with me [I probably need the 6:1] so we decided for fun to put a small tube with 3 tiny holes drilled in it in the vacuum line feeding the FPR. And guess what? It worked perfect. The A/F is great.
So then we proceeded to crank up the boost a little and lo and behold I left with a safe 177rwhp/177rwtq.
[Oh and by the way, the ambient temperature was 103 degrees... Yeah, that's right.]
All I wanted was a decent A/F ratio and now I have 177/177 on tap and i am pretty stoked. I just thought I would share with someone who would understand what the hell I am talking about.
Here's the set-up just in case anyone is taking notes for their own build:
Stock motor with 150k miles [All synthetic fluids]
93 Octane Chevron fuel
Used Greddy kit with relief cuts in manifold
Custom RX-7 intercooler set-up
Bipes [Pulling 1 degree of timing for every 65 degrees of intake temp and pulling 5 degrees of timing between 3000rpm and 4000rpm.]
Older Guy's O2 clamp
1.8 liter Miata injectors
Vortech FPR with a 8:1 disk and a little bleeder on the vacuum line
Walbro 190 lph/hp fuel pump
VooDoo Manual Boost Controller
OBX Stainless Dual Exhaust
So anyway... That's about it. I'm pretty happy right now. I am going back after I either put a spacer on my wastegate or a helper spring or both to prevent the boost from bleeding off after I reach peak. And after I put in a little stronger clutch. The consensus of everyone at the dyno was that I should be pushing about 190rwhp if I would come back when the temps were closer to 60 degrees. I don't know how many of you live down south, but 103 is freakin' HOT.