hi...i have a 2001 fd3s which i modded a bit...these r some of the mods that i did...

power fc, upgraded smic, custom k&n intake, 850cc primaries, 1300cc sec., full exhaust, greddy air pump removal pulley kit,...

i made 270whp at 14.7 psi on a dynodynamics dyno...i have heard of different dyno brands recording different HP figures...how different is it to that of a dynojet?...the motor is stock port and stock turbos...does this figure seem right to you?...thanks

 

Sounds low. At that psi, with full exhaust, I would expect over 300 rwhp. Don't know about that dyno. Has your pfc been tuned?

 

your car should be making close to 270whp stock, however I don't know anything about that dyno. There are two major dyno's we use in the States, Dynojets and Mustang dynos. Dynojets tend to run high, Mustang dyno's tend to run low, for that reason, Mustang dyno's are usually considered the more accurate one however the truth is dyno numbers are only a rough figure. They show what your car was putting down at that time of that day in that humidty and that heat with that dyno technician on that brand of dyno. the actual power your car's making could vary a lot.

 

270 whp stock ? stock what?

 

stock series 8 RX-7, which was rated at 276hp, but dynos at around 270whp.

 

i believe u are giving wrong info

 

ugh, no hes not, haha. Thats true.

 

OP said:

So SLOASFK is correct!

 

i was just doing a little search on google and came up with this page...http://forums.nasioc.com/forums/showthread.php?t=286440...

 

2000+ stock fds wont made 270whp on the wheels
I made 280 on the wheels with a re-amemiya ecu downpipe and a smic at 0.9 bar

it sounds low .upload the dyno graph

 

My car has been tuned/mapped on a Dyno-Dynamics Dyno. At .8bar I was making 280rwhp.

270 is pretty low for 1 bar (I'm making 325 at 1.1 bar). What were your AFR's and is the person doing your mapping experienced?

 

270 whp is not gonna happpen. Even on a series 8 stock.....

 

Hi!

Have you ever heard of drivetrain loss???

Sorry, but the '99 spec turbo's do NOT make more than BNR's per a given PSI. There is a difference between base horsepower, and wheel horsepower.

 

When compared to a Dyno Dynamics Dyno (Australian Dyno) the Dynojet will give a reading approx 18% higher, and the Dynopack will give a reading 15% higher.

I'm just stating this to clear up any confusion on European numbers (they tend to use Dyno Dynamics dyno's here) and American numbers (I was expecting American numbers until my tuner (one of the better ones in England) pointed out the difference to me). 325whp on a dyno dynamics is basically 380-385whp on a dynojet. 270 is about 315-320, which is kinda low for 1 bar, no matter how you slice it...

 

other than that. the terms horsepower (hp) is per ton. rx7 is 12xx kg
And the tolerances from the engine till the wheels drop the whp ( wheel horsepower )

Its impossible to make 276bhp and 270whp

 

It's rated at 276 bhp, as in the case of the RX8, rated numbers can be grossly off of what is measured. I'd like to see said dyno graph, 270 whp on stock twins is pretty impressive.

 

Fenda and RRRX7, have you dynoed a stock S8 RX-7? I've spoken with people who have, and the answer's always the same.

Have you heard of the 2003-2004 Mustang Cobra which was rated at "385 HP", not "385 BHP". Dyno one stock and it will make damn close to 385whp. Ratings aren't always at the flywheel.

Anyway, the long of the short of it is, as Fendamonkey said, he's low for 1 bar.

 

^Probably the most important thing to take away from my comments...

I gained 40whp off a decent tune (alone) from a good shop.

Though the % numbers from one dyno to another hold true, the rest (anything seen as trashtalking) is drunken banter...

Seriously though, a dyno is simply a tool used to produce a good, strong, safe tune. Numbers are simply that, numbers. Get yourself a quality map that holds good AFR's, and appropriate timing, and you are good to go!

 

i have dynoed my 2002 type R completely stock on a dynojet making 243 whp.

I said its low too

 

Dyno Dynamics read low hp numbers. For example a local owner put down 276hp on a dynojet in his FB w/ REW swap. He dynoed on a dyno dynamics and put down 238hp at our most recent gathering

 

a friends 2001 Rb produces 316whp at 0.8bar btw with pretty much same mods (FMIC instead of SMIC)
he uses the stock injectors and kept his airpump.