Dyno results from last night

[Guest Jason84NA-T]

Last night felt like an etermity! I drove to the shop after leaving work early. They already had a new Lotus Elise on the dyno, after installing the MWR turbo kit (By the way, MWR is the premier US tuner of the Toyota 1ZZ and 2ZZ 1.8L engines, their shop is very nice, and the owner (Matt) is extremely cool. http://www.monkeywrenchracing.com). Pics of the hot little Elise (LARGE):

http://www.redz31.com/images/dyno/lotus1.jpg

http://www.redz31.com/images/dyno/lotus2.jpg

http://www.redz31.com/images/dyno/lotus3.jpg

http://www.redz31.com/images/dyno/lotus4.jpg

 

Pic of their awesome shop (LARGE):

http://www.redz31.com/images/dyno/mwrshop.jpg

 

In case you did not know I am running on a bone stock 260K mile 88T engine, I have not touched anything internally. Compression is a little on the low side, but nothing substantial and no outliers... it burns almost no oil.

 

We got my car on the dyno and I started my first pull at ~10.5PSI. Came out to a little over 300WHP, doing good!

 

So I start to inch up the boost 12.5PSI... ~330rwhp. With power peak at 6000 RPM! still pulling strong all the way to 6700+ at the cutoff.

 

Now here comes the interesting part. I put some timing in and on the next run It started breaking up. We did another slow run looking at fuel pressure, it was bobbing all over the place. After a little while I realized it was not because of the timing or fuel pump, but because my "lifetime" alternator had outright died! Looked at the voltmeter, and it was at about 11 volts... CRAP! NO MORE NAPA ALTERNATORS!

 

Matt (the owner) was nice enough to drive me to the local parts store where I bought ANOTHER new lifetime warranty maxima alternator, by the time we got back it was around 8PM. As I replaced the alternator he worked on assembling an engine (2ZZ stroker with built everything, ported heads, GT30R, the works, all going in a 2500lb car... very cool).

 

With the car up and running it was getting late, and I was really pushing it as far as "an hour" of dyno time is concerned. Then for some random reason the car refused to start. after another half an hour of fudging around with it I realized the binary I was working with somehow got corrupted, so I had to go back to an earlier tune from like a week ago *grrrrrrrr*. I got a few more pulls and with fairly conservative timing managed to obtain 383RWHP and 373RWTQ at 18PSI boost pressure. Not quite the 400RWHP I had hoped for, but not bad.

 

The one major issue I ran into seems to be valvetrain. As I increased boost pressure past about 15PSI, the power curve started getting "truncated" (for lack of a better word) lower and lower in RPM. That is, peak power kept occurring lower and lower because of the higher boost, but the power was dying off sooner and sooner. Ended up going with 18PSI because it only cut off about 5700RPM (as you can see on the sheet). I really should have asked him for the 10PSI run so you could see how power pulled in the top end, the curve extended out from where it was almost another 1000RPM, it's really something! The only thing we could think of was valve springs, perhaps soft (after 260K miles I should have expected this) or maybe one has a broken coil, who knows. Any other ideas on this issue? Also, I have an exhaust port leaking because the studs are broken... causing boost response to be somewhat reduced.

 

I'll probably be repairing my ported heads this winter and installing them (with the JWT valve springs and reground cams that are already in them), but I think I'll look for another low milage NA engine to put them on.

 

I left after a long night, thanked Matt for his generousity and headed home to pass out. I should have asked him for more printouts of the earlier/lower boost settings for comparison... I'll call him later this week and ask if I can get those.

 

Enjoy:

http://www.redz31.com/images/dyno/jason84na2tdynosm.JPG

[Silent]

just don;t blow it up again man.

 

 

btw, i met you at the branson z fest

[mtcookson]

those are definitely some nice numbers. hopefully i can get to work on the VG in my maxima sometime and some similar numbers.

[260DET]

Great results What turbo? Like your web site BTW, very informative.

[Guest Jason84NA-T]

Great results What turbo? Like your web site BTW, very informative.

 

The turbo is nothing super special, and for sure not what I would call big:

 

Compressor:

T04S (60-1)

4" inlet 2.5" outlet

Turbine:

"Stage 3" Garrett T3

Stock .63 AR turbine housing bored by turbonetics

[BLOZ UP]

wow! peak torque at 4k rpms? When do you hit full boost? I had my peak at 4600 on my t3/t4 stg 3, .63, 57 trim. I cannot remember when I hit full boost, probably about the same time or earlier.

[Thumper]

LOL I had my peak torque at 2800rpms 404lb-tq. That was fun to say the least. But i only had 280hp so it dropped very very quickly. Nice numbers I think you can get 400wrhp out of it with just a tad bit more boost and better tuning. Good luck

[Guest Jason84NA-T]

Nice numbers I think you can get 400wrhp out of it with just a tad bit more boost and better tuning. Good luck

 

Yeah, I was going really conservative on the timing and fuel there. Now I'm actually running from 5-7 degrees more over most of the map and it pulls quite a bit harder. I'm sure it's over 400rwhp at the same boost pressure, but there's no sense in dynoing again until I have an engine in there with a little less than 260K miles. I also have some ported heads, reground cams, adjustable cam gears and a few other little bits to install this winter. Think I can hit 450rwhp with a stock turbine housing?

 

I'd also like to put the nitrous back in the car, but the walbro is pretty much maxed out as it is. I was considering a secondary pump...

 

I ran my buddy's built 12:1 347 mustang last weekend. I braked boosted on him and managed to stay RIGHT with him from 50-130ish. His car traps at 118mph, so I'd say the Z is doing alright. There can't have been more than a couple yards difference between us the whole time.