Dyno tuned made good torque but low hp

[1SIC1Gb]

Got the car dyno tuned and made 399.8lbft of torque but only 327whp
This was on a mustang dyno.
1g talon awd auto
Stock longblock arp head studs
Dsmlink (no log)
8blade hx35
28psi
E85
Fic 1050cc only at 70%dc

What could be causing this ? Torque curve really drops off quick! Tuner thinks cams but I'm not sure? Feels great on the street . This pic is not of the last pull but close. The pic shows 305awhp and 375wtq

 

[rr06rs]

Who tuned it? You look extremely lean!

 

[5150DSM]

Looks like a big lean spike spooled the shit out of that 8 blade. Hit peak airflow way early in the rpm band and choked out. Cams would definitely help, I/M as well and maybe a more conservative tip in AFR.

 

[TJCTalon]

Dont forget auto's eat alot of power.

But your right something still isnt right. Your torque should drop off that fast. And you should be making a bit more power. But with those torque numbers its not off by much.

Id say its the tune

 

[viperlp01]

Lol are you guys serious. No intake manifold or camshafts?!?!?!

 

[1SIC1Gb]

Local guy tuned it but they were getting concerned with if the drivetrain loss really is that much then the torque it's making is getting close to a stock bottom ends limits. Timing belt is looser than normal in between the gears and the timing isn't dead on the tdc mark it's in between the tdc an 5btdc mark when I line the gears off. Tooth off maybe? Would it make this kind of power if it was?

Tuner spent about 3 hours on it and tried everything we could think of but I'm not sure what else just never seen a dsm make 70+ tq more than hp
I mean don't get me wrong it rips on the street though definitely feels very quick . Also being a mustang dyno I've heard up to 12% lower readings than like a dyno jet ..

Lol are you guys serious. No intake manifold or camshafts?!?!?!

What do you mean ? Me running the stock I'm and cams or that people are suggesting it?

 

[viperlp01]

Your not making any horsepower because you are on stock cams and intake manifold. Autos also doesn't help with the number. If you put a decent set of camshafts(Kelfords) and a quality intake manifold(Magnus) your torque curve would be flat*ninja edit* er.

 

[LandSpeed-DSM]

What john said.. plus a vote for tooth off with mechanical timing is bringing that turbo on all at once with the aid of a burst of heat from the lean spool scheme.

What turbine housing? This has to be a bolt on. Is boost holding to redline?

Do you have a log?

 

[killercolt]

Check the boost log or check the boost gauge on the street. You might just be spiking 28psi and dropping to a lower boost up top. Intake manifold or cam might help some.

 

[gofer]

A log definitely tells more than a photo of a dyno graph, post one if you've got one available.

I'd be happy with those numbers knowing that you've got stock cams in there and your mechanical timing isn't dead nuts. Besides, a dyno shouldn't be about the numbers you can print out on a chart, it's about the numbers you put up at the end of the track. Use the dyno to tune and the track to see how fast the car is with you in the drivers seat...

 

[1SIC1Gb]

What john said.. plus a vote for tooth off with mechanical timing is bringing that turbo on all at once with the aid of a burst of heat from the lean spool scheme.

What turbine housing? This has to be a bolt on. Is boost holding to redline?

Do you have a log?

Bep bolt on .55 housing . Ill get a log later today .

I am not really a numbers guy, as long as it feels fast and gets decent times , I just haven't ever seen such a difference in tq and hp on a dsm . The timing being a bit off is the worst part because it sucks to fix . Going to tx2k13 this weekend so we will see what it runs ill post a log later today hopefully I can get out and drive it

 

[rr06rs]

I was actually going to say it looked like either leaky valves or skipped tooth.

 

[triston2469]

Well i know from what i have read in order to get more power out of your car you need to open your intake and exhaust up so that your engine can breath better. I mean you can upgrade all kinds of stuff, but if your engine cant breath your not gonna put down any power.

 

[1SIC1Gb]

Yeah I'll look into the smim and cams for sure but I was just wondering if something obvious was wrong .

 

[gofer]

Reverse that order, cams then IM. You might gain some up top bolting on a different IM but those stock cams are your limiting factor right now, ESPECIALLY the 1g A/T cams.

 

[Bud92gsx]

Yes if he's still on stock auto 1g cams uke:

Cams then IM gets my vote too.

 

[1SIC1Gb]

Well the engine is out of a stick but still I need some cams . Looking at the gsc s2's

 

[dsmfa9nutter]

I'd double check timing first, then either advance the cams with some adjustable gears or if you have the budget, buy some new cams.

 

[eviltsi]

This is old, but...

That is completely normal for an auto on a mustang dyno....assuming it was calibrated by wheel speed. The torque converter is not locked up giving you a false reading. If he would have calibrated it through the obd port it would have given an accurate reading. There's nothing wrong and i sure hope he didn't charge you 3 hours trying to figure out "the problem" when he just didn't know his machine.

 

[mschlanglv]

. Timing belt is looser than normal in between the gears and the timing isn't dead on the tdc mark it's in between the tdc an 5btdc mark when I line the gears off. Tooth off maybe? Would it make this kind of power if it was?

Tuner spent about 3 hours on it and tried everything we could think of but I'm not sure what else just never seen a dsm make 70+ tq more than hp
I mean don't get me wrong it rips on the street though definitely feels very quick .

Not quite 70+tq, but close.

http://www.dsmtuners.com/forums/dyno-talk/460880-2-4-e316g-216-hp-263-tq.html

I haven't been back to the dyno, but I did find that the intake cam was advanced 3.75*(1/2 tooth). Since fixing that airflow in the upper rpm range is quite a bit higher than before, based on MAF Hz logs.

 

[1SIC1Gb]

This is old, but...

That is completely normal for an auto on a mustang dyno....assuming it was calibrated by wheel speed. The torque converter is not locked up giving you a false reading. If he would have calibrated it through the obd port it would have given an accurate reading. There's nothing wrong and i sure hope he didn't charge you 3 hours trying to figure out "the problem" when he just didn't know his machine.

Good Info! What do they have to calibrate? I dont understand how, what needs to be changed.

Thanks