Exactly...your tach signal was off on the dyno. The dyno measures HP and computes torque based on the equation HP = (TQ x RPM) / 5252. You rearrange to solve for TQ and get TQ = (HP x 5252) / RPM. If your RPMs were reading lower than they actually were your TQ would have gone through the roof....It happened to my friend's wagon on the dyno...

 

So what would be a good number for the midrange? Is it possible to adjust this leanness with the Apexi controller? Another problem is that this dyno test is the only spot which offers serious dyno testing in Switzerland! But this guy had no clue about rotary engines...also that he couldn't messure a certain range of rpm seems weird to me...do you know anyone near Switzerland who is more professional about dynoing a Rx7 (I don't want to do a world travel)

 

Dyno'd today. 402 rwhp at .94 bar on PFC, 15psi on the autometer boost gauge, 16psi on the dyno's gauge. AFR's were showing about .5 leaner on the LC1 logs, just swapped in a 3 bar last night and I haven't tuned for it yet, hence the huge rich spot in the map.
Ran 11.58@121 in the 1/4 mile last week (w/o the rich spot). Not a drag racer, just went to get an 11 sec slip, prob could shave some .1's off it if I really cared, but I'd rather save it for the road course.
Mods:
T4/GT40 Turbo(don't even know if phoenix turbo still makes it)
Tial 44mm WG, atmosphere dump
SS equal length manifold, supposedly Gotham.
3" full exhaust, no cat
CAI, M2 Large SMIC
port matched, double throttles removed
Pineapple medium intake streeport template, exhaust by me.
1600cc secondaries, FPR, SR Ultimate fuel pump
MSD 6A, 2nd Gen coil leading
PFC, Datalogit & LC1, logged and tuned by me
Timing derived from some old Westbrook maps
Exedy twin carbon clutch/flywheel
91 octane gas with about 20% toluene for octane boost to about 93

 

I know some of you have been asking for a graph of a pretty stock setup, so this should be helpful.

The dyno was a dynapack direct chassis setup so the figures should be alot more accurate than a rolling road.

My car is a JDM 92 3rd gen, only mods are an intake (very similar to the HKS setup, just twin pod filters really). As its a JDM model it doesn't have a pre-cat. It has had an auto->manual conversion done at some point, so there's another 500rpm that could be used.

Peak power: 181 KW atw (243HP) @ 10psi

I've been having problems with the vacuum tube that goes to the pressure tank popping off, and I believe it may have happened on this run (as it was definitely popped off when I checked it when I got home). There is a boost drop at 5300rpm from 10psi to 8, giving a sudden 20hp drop. If this the case there's probably a fair bit more available.

Anyway, very happy with the result, 243RWHP should be around 280 flywheel, so that's pretty good considering its a series 6.

 

I'm sorry but you are very wrong. Torque is the turning force. Power is derived from Torque. Not the other way around like you stated. And btw you dont have to put parenthasis, multiplication and division are conjugative.

the correct formula is Power=TORQUE*RPM/5252.


That graph is in Newton*meters(Torque) and PS(Power). They have different values that American units so that formula doesnt apply anyway. But power is still derived from torque. No traditional dyno can read power, only torque

 

Nice

 

1994 RX-7, stock engine and turbos (about 77k miles), Xcessive LIM, Injector dynamics 1000cc injectors, AEM EMS and wideband gauge, Megan Racing downpipe (wrapped and coated), stock intake and exhaust. 229hp at ~10-11psi boost, ~10-11AFR.

 

Tuned by me. Perfect day outside yesterday so deiced to go to the local dyno. This was running about 1bar.

Best run was 327hp 301tq
http://i21.photobucket.com/albums/b2.../FD/myrun1.jpg

My first run with the rough street tune over layed with my best run. Just to see the gain from the tuning session.
http://i21.photobucket.com/albums/b2.../FD/myrun2.jpg



Power related mods
-Stock motor 71k miles
-Stock twins running non-sequential via PFC
-Greddy pulleys
-Pineapple Racing idler pulley
-K&N filters
-APEXi AVCR
-APEXi PowerFC /w commander
-full turbo back exhaust to RE Amemiya T/A dolphin tail muffler
-Supra TT fuel pump (relay wired)
-Efini Y-Pipe
-Trust SMIC
-Greddy Elbow
-J-SPEC 5 speed transmission

 

624Whp
492TQ
30psi
Power FC tuned by "BladeTech"
Twin Power

engine had bad compretion less than 70psi on both sides... now that the tune up has a good base map I'm building new motor.

here is tthe graph

 

Just got back from the dyno here what she ran. This is on a Mustang dyno.

 

didn't realize close to stock dynoed that low

 

some of you guys are putting down some nice power

 

dyno

stockports

mods

pfc
12lbs boost
custom intake
mazmart water pump
custom rad setup
3" downpipe
3" highflow cat
catback
full emissions

max hp 292
max torque 246

 

Nice, with emissions intact too. I'm liking the torque below the transition point. Your transition could probably use some work, but I bet your car is very fun on the street Looks pretty lean up top IMO, I would talk to your tuner about that before you lean into it too much... where was the WBO2 reading taken? Before or after cat?

 

i'm the tunner
if you notice the correction the air was almost purfect
so it was tuned that way becouse the rest of the year it will be fat and happy
becoust the air will not be that good except a few times a year
wbo2 was after the cat

 

Amazing engine was built by Ray @ PFSupercars. Awe-inspiring.

 

VERY impressive. Willing to share more details?

 

i'll contribute.. this is from a yr a go.. i recently changed my setup.

http://i73.photobucket.com/albums/i2...oms/img004.jpg
http://i73.photobucket.com/albums/i2...oms/img005.jpg

 

VERY impressive.

Where did you dyno?

 

Sure!

clearanced street ported 2mm motor by Ray @ PFS
Electromotive TEC3R with ignition
Borg Warner extended tip 66mm compressor, 1.15 A/R
PFS 4" downpipe
Ceramic coated manifold
Tial 44mm wastegate routed back into down pipe
Rotary performance 3.75" exhaust
Xcessive/Ground Zero Lower intake Manifold
Big Bore AEM throttle body, no double throttle
SR motorsports 3 piece pulley set
Dual Nippon Denso 280lph fuel pumps in tank
KG parts primary and secondary fuel rails
1000cc primary injectors
1600cc secondary injectors
Aeromotive Fuel pressure regulator
inline 150 gph fuel filter
Rotorsports racing polyurethane motor mounts
PFS Race intercooler w/meridyne 225 watt fan controlled by management
Greddy elbow
custom PFS cold air fresh intake pipe
Gotham oil pan brace
Mocal 28 row oil cooler with thermostat and spal 6.5" fan controlled by management
Koyo Radiator
Greddy catch can
ACT Xtreme pressure plate
ACT unsprung 6 puck disc
SR Motorsports 9.5 lbs flywheel
KAAZ LSD w/ stock 4.10's
....usw.


oh, and a bunch of c16 race gas.

Desperately need to get a half-bridge port engine installed though...

 

For some reason they can't get a good pickup from the MSD black wire. Keeps missing a range...help

 

So how do you have max HP at the 5,500 to 6,000 range? I would think with a rotary you would have max HP much higher in the power band than this.

 

HP peaks at 6400, but that's definitely not a happy combo right now.

 

Yep, read it backwards but that is still too early for a 13B to peak.

 

you guess is as good as mine...