Dyno'd my SVTF this morning

[Miller]

Well put it on the mustang dyno here at school today and I gotta say I was a little disappointed. I had heard I should be around 140+ stock at the wheels. I have a K+N filter, new plugs and MSD wires. Well I made 124 whp at like 6300 rpm and 112 wtq at around 5000 rpm. I will post up the print out once I get it scanned in.

Are these numbers unusual? What could be wrong?

[Patalrob]

A tune will wake it up

Mybe Steve will chip in here he has a great tune on his SVT.

[Miller]

Yeah I won't be able to put any money into it until this fall again.

[KRYPTO2]

I made 147whp and 138tq with just ORP and CAI

[Stilz]

A couple years back when I had mine on the dyno, it was 150hp @ 143 tq
K&N SRI & FRPP wires was all I had then.

[Miller]

DSI problem? I tried standing over it and revving it with the TB and didn't see anything move. But then again, I don't know where to look.

[Pappy]

140+ WHP is normal - On a dynojet...

Your numbers are right for a Mustang or Dyno Dynamics dyno's. They read about 15%-20% lower than dynojets.

So your car is right where it should be. For example I'm 199whp on a dyno dynamics and am super tempted to get some wicked street cred numbers by dynoing on a dynojet haha, as I'd likely be in the 225 + range...

[Miller]

ok, sweet. This was really only a baseline just to see if my Borla catback and 67mm TB get me anything.

[Steve@Tasca]

Yep, it's the dyno.

Mine put down 154 hp and 140 lb.ft. on a Dynojet.

The other SVT I dynoed with put down 138 whp and 128 lb.ft. but his was 100% stock at the time and mines tuned.

If you figure an approximate 20% loss through the drivetrain a 170 flywheel hp car should put down about 136 wheel horsepower.

And I can tell you right now that a cat back and throttle body won't show much if any gain on the dyno, a couple HP max but the throttle response and sound will be well worth it.

You need a tune.

[KRYPTO2]

I wonder what I'll make now with my tune and other upgrades...

[ch435]

So which dyno do people consider the most accurate then?

[hermitmaster]

Dynojet

*edit*
or Butt-Dyno

[Steve@Tasca]

So which dyno do people consider the most accurate then?

If you look at the numbers it's got to be the Dynojet.

Like I said, if a car is rated at 170 flywheel hp it should put down about 136 hp at the wheels given the approximate 20% drivetrain loss.

SVT's seem to be a bit under rated by the factory for the most part, I know Ford/SVT got real cautious about horsepower claims after the issues with the 2001 Cobras being proven to be under the claimed power levels.

[Miller]

[KRYPTO2]

whats with the slight drop 1/4 way through