Throw Down! MS3 260whp 300wtq

[dalesd]

I'm planning to take my brand new MS3 to the dyno next weekend.

It's a Dynojet Model 248E. Is this a good one? What should I look out for?
I'll be there with a British car club.

Could you offer some Do's or Don'ts for getting good results? (e.g. Hood open or closed? Why or why not? What about heat soak on the intercooler? This is my first turbo car, so any tips will be helpful.)

 

[CTGrey02]

yours is stock right? he has tmic upgrade ?

Mines stock, the other guy had a Cold Air intake (think it was the injen now for what ever reason) Either way, just a CAI

Dalesd - Give the car time to cool down when you arrive. Open the hood, let the intercooler get some of the heat out. If you really wanted to get better numbers you could put a bag of ice on the Intercooler, but we didn't do that. Another thing you can do is spray the IC with water to cool it off. Other than that, closed hood got identical numbers to open hood with us, so we saw no difference. Also saw no difference in which gear it was in other than the time it took for the turbo to spool. 4th was apparently where the car liked being dyno'd though.

 

[MrTea]

though i think CAl Speedway is definately one of the greatest strips around here....i can't stand how busy it is for street legals. i swear it's like 2-3 runs if you lucky! we pulled up when they opened (given, it was after rebuilding the track after 6 months of being down) and the line to get in was past the corner of the street the track is on....friggin rediculous. i'd almost be happier doing the 2 hour drive up to bakersfield and running Fomosa 12 times to get the practice.

i've had my car on 5 different dyno's so i've seen the variances. i'm do for another one next month as well.

 

[dalesd]

I had my dyno runs today. Bone stock. 400 miles on the car.

Hood up for all runs. There was a fan in front of the car, one of those floor-drying fans. It was on top of two milk crates, so it was pointed almost directly at the Mazda badge.

All numbers are SAE corrected. All runs were in 4th gear.

First run had some wheel slippage, but the numbers were still valid, I think.
233.65 hp @ 5550 rpm
237.20 lb-ft @ 4800 rpm

Second run:
229.18 hp @ 5450 rpm
253.07 lb-ft @ 4100 rpm
No wheel slippage, but some heat soak. After the run, the IC was too hot to touch.

Before the third run, we sat the fan on the IC until it had a chance to cool back down to room temperature. Just a few minutes.

For the third and fourth runs, we opened the snaps on the stock airbox and pried it open a bit.

Third run:
250.60 hp @ 5450 rpm
283.21 lb-ft @ 4200 rpm

Fourth run:
230.36 hp @ 5550 rpm
248.58 lb-ft @ 3950 rpm
Looks like that IC gets heat soaked pretty fast.

I have the actual data files from the DynoJet. There's a free software viewer on DynoJet's website.

The A/F ratio is interesting. As soon as the boost comes on, the A/F drops like a rock.

 

[jeffmsp]

gas octane rating, ambient temp, intake temp, the shops fan power, humidity, elevation, spark plugs, how heat soaked the IM and IC are etc. are enough factors to conclude his dyno is possible I think. Theres a big difference in power if the ecu is pulling timing (for whatever reason) or if its running hard. Anybody bother looking at what the ms3 knock sensor is outputting on the dyno vs on the street?

 

[staples187]

I'm extremely happy with the 3.5" ETS TMIC. I run the car hard at 90+ degrees and when I come to a stop, open the hood at idle and the intercooler is like an ice cube.

3.5" TMIC, CPE CAI, Billet Rear Engine Mount, GHL 3" Exhaust. I'm debating between the Downpipe or the Test Pipe. They both have similar gains because the second cat seems to be where the main restriction is coming from.

I can't find a dyno around my area in Maryland (Harford County), if anyone has any info let me know.