Dyno Troubles

Saleen05797 · 08-25-2007, 12:27 AM

Went to the dyno today for the final pulls. Did one pull and got 450 rwhp. Everything went smooth. My tuner did some tweaks. Started the second pull, got to 5k rpm, hit 512 rwhp, and the car shut off. No smoke, no sound, nothing, just shut off. No error codes either. It's on a stock motor (not built). What could be the problem? Everything runs like its supposed to before its supposed to start but when I turned the key, nothing happen. Sounds like normal, just doesn't start up. Any ideas?

smoothy · 08-25-2007, 08:35 AM

Did you try reflashing the tune back to stock?

PolkThug · 08-25-2007, 08:40 AM

hit your fuel reset. Drivers inside panel, left of the clutch pedal.

AmyVCTexas · 08-25-2007, 09:29 AM

Quote:

ORIGINAL: PolkThug

hit your fuel reset.Â* Drivers inside panel, left of the clutch pedal.

I'm betting on this option. This question is right up Polk's alley and I KNEW he'd have the answer. [sm=signs007.gif]

Saleen05797 · 08-25-2007, 03:57 PM

I'll check it out when I stop by the shop. I hope its as easy a fix as it sounds! How much HP can the stock engine handle? I keep hearing different things from different people? I've heard about 500 from you guys and then from local mustang people I've heard 600-650 rwhp?

mills281e · 08-25-2007, 04:11 PM

600 - 650 [:-].....sounds like the local shop/mustang folkswould like to get you back in there for some more work (i.e. rebuild) as soon as possible

. Are any of them putting that kind of power down safely?

Saleen05797 · 08-25-2007, 04:14 PM

That's what I was thinking, but the one guy I used so far has been good to me with everything. Even got my my tranny fixed under warranty by talking to Ford when they denied the claim.

The tuner said he did one that made 580 rwhp, either a turbo or twin-turbo setup.

If there was no sound and no smoke, then the engine should be fine, am I right?

mills281e · 08-25-2007, 06:16 PM

Quote:

If there was no sound and no smoke, then the engine should be fine, am I right?

Nope! You can have a great tune on a stock bottom end and achievethat kind of power (e.g. no smoke/no pinging). The thing you have to worry about is the stress that much power puts on your internals, such as rods, etc.... over time. In the case of 600 - 650 rwhp....likely, relatively short time.

Saleen05797 · 08-25-2007, 07:34 PM

Well I want to leave my car tuned around 500 rwhp. The only time I'd be putting too much stress on it is when I'd go past 5k rpm right?

What I was trying to get at in my last post is that the car shutting off was not a result of the engine blowing? A couple of pulls shouldn't do any major damage at that high rwhp on the stock motor right?

S281 E · 08-25-2007, 10:12 PM

They say the new motors can take up to 450 RWHP reliably. COuld be conservative but it comes down to how often and much you push the car.