luizajeff

Does anyone have a link or pic of a stock FD power curve? I just haven't seen one yet.

jimlab

http://home.gci.net/~jimlab/images/Misc/RX7_vs_RX8.jpg

InsaneGideon

Jim, do you know where one could obtain an .xls or .csv of that data?

Thanks

Rated R1

What is done to the "modified" FD?

dgeesaman

iTrader: (7)

BOV, CF hood, and Mazdaspeed decal.

Oh, and it's chipped.

PVerdieck

Here is are couple dyno runs the original owner did on my car.

Total mods he did were Pettit Intake, Pettit underdrive pulleys, Pettit/Borla catback. I think some of the dyno description labels are incorrect.

http://www.verdieck.com/RX7/dyno1.jpg



http://www.verdieck.com/RX7/dyno2.jpg

jimlab

That's Brooks Weisblat's old car, and the curve was taken from the 364 RWHP dyno chart he had on his old web site. His car was heavily modified, but still had the stock twins in sequential configuration.

BlackRX7Turbo

My RX is only mildly modified power-wise (intake, catback, downpipe, M2 stage 2 chip, and pulley), but my dyno chart has the same pattern as Brooks Weisblat's car... is that normal? I had assumed it was....

jimlab

Yes, a healthy sequential car will almost always have the dip and peak while a non-sequential car will be more linear through the mid-range.

tangoshark

iTrader: (18)

anyone still have the dyno graph herer? none of the links above are active

arghx

iTrader: (3)

Just saw this thread. Here are two things to look at.

This one is something I found on here a long time ago, done on some kind of chassis dyno (doesn't look like dynojet). It compares what I believe is a bone stock FD to some unnamed single turbo setup.

https://www.rx7club.com/attachment.p...1&d=1348451646

this one was published by Mazda, using smoothed engine dyno data (comparing series 5 T2 engine with series 6 FD engine)

https://www.rx7club.com/attachment.p...1&d=1348451646

tangoshark

iTrader: (18)

great. I know the legendary Arghx will replay sometime. haha. thanks bud.

When I did my dyno at Corksport, they couldn't get the graph right that has the rpm on X axis so they went ahead and made a graph of HP and Torque vs speed (mph). I know my turbo trasitions late at around 5500 rpm so I was trying to confirm that on a dyno but too bad it didn't work out that way.

arghx

iTrader: (3)

Glad I could be of assistance. The inductive clamp used to for rpm signal is tricky to get right sometimes.

tangoshark

iTrader: (18)

I thought the hp and torque curves should always cross at 5500 rpm but the stock FD vs single graph u attached show that they cross before 5500 rpm hummm.

arghx

iTrader: (3)

In the chassis dyno sheet comparing stock turbos to single, the torque and hp cross at 5252rpm. Torque and hp always cross at 5252 rpm if you are actually using the units of lb/ft and horsepower, with a graph appropriately scaled.

When using metric units, usually kW and Nm, they won't cross like that.

tangoshark

iTrader: (18)

That's right, its 5252. For some reason I had the number 5500 stuck in my head maybe because my turbos transition at 5500 instead of 4500. I will post my dyno graph next week that I did at corksport on their dyno dynamics. Everything on car is stock except for radiator and RB cat back but I got 240 whp, makes me hard to believe.

tangoshark

iTrader: (18)

I am trying to compare my dyno w a healthy stock FD to see at what rpm range my car behaves differently and from there to see if I can find out what is malfunctioning that's causing the late turbos transition. I can't feel the 2nd turbos kick in either.