Quote:
Originally Posted by LittleBlueGT
Any updates, this is still the best 380ish whp DD set-up I have seen?
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Sorry for not posting back sooner... it has been a busy summer.
Things have been running well, however I did have an interesting problem pop up. About a month ago I noticed things didn't seem as quick as usual. Timing didn't hold as well, and the car seemed more knock prone. After about 2 weeks I noticed my AFRs were getting richer. It took over 2% change to the MAF to get things back in line.
After about a week more like this, things got a lot slower. I popped on the dyno and at 20PSI I was making about 285whp. Hmm.. The car was also very quiet.
Clearly my cat had clogged up somehow. I have a single cat downpipe right now (had 2 cats originally). I pulled the downpipe off and sure enough the cat was broken and floating around, as well as a bit melted. I pulled the cat material out and put the pipe back on. Here is a quick 4th gear pull:
and
As you can see compared to my previous graphs, spoolup is a bit better now. With my agressive AVCS maps, I can get this GT3076R (.63) at 15 lbs just before 3000 rpm, and I touch 20psi at 3462rpm. As far as I have seen that is one of the faster rotated Garrett 3076R spoolup setups. I noticed I am hitting 70% duty cycle on the injectors. I have the DW 1000cs, so I imagine in my S# map at 22-23psi I'll be a bit closer to 85%. Still plently of headroom for a safe map.
If I have a chance I'll do a bit of fine tuning on the dyno. I have a new cat section I'll weld back in this week.
As a daily driver it works well.. I have completly worn out my 275/40R18 KDWs, so I'll replace those this week.. and the brake pads and rotors are also ready for replacement. I am at about 30k miles, with about 28k of that on the GT30R.
I did do a quick compression test, and all 4 cyls are right about 135 warm, and the motor sounds great.... althoiugh a bit like a diesel when cold.
After the last year driving to work in the rain/snow and nice weather, I'd give this DD setup a gold star. It is fun to drive, great power, and all around good.
Cheers,
Jeff Sponaugle