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?
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?
600 - 650 .....sounds like the local shop/mustang folks would 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?
< Message edited by mills281e -- 8/25/2007 2:13:06 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?
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 achieve that 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.
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?
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.
This is true...I am sure that with 500rwhp it MIGHT be safe but 450rwhp is the safety zone before building the bottom end...If you are going to be pushing 500rwhp all the time, you need to get forged rods and a forged crank...if you dont want to build the bottom end, get a more conservative tune to run closer to 450rwhp...Your going to end up costing yourself a crapload more money if you try and run just that 50 extra rwhp consistently
Well see that's what I'm trying to figure out. What do you guys mean by consistently? Normal everyday driving, shifting at about 3k rpm tops, shouldn't have that much stress on the engine...?
Well see that's what I'm trying to figure out. What do you guys mean by consistently? Normal everyday driving, shifting at about 3k rpm tops, shouldn't have that much stress on the engine...?
hey if you are gonna drive like that, why bother getting the extra hp? Might as well drop in a V6 and save fuel
Seriously, spend some cash, Haney has forged kits for $1800 then you dont have to worry, even if you decide to bump up the hp even more in a couple of years (much cheaper than the price to repair if you grenade your engine).
Well see that's what I'm trying to figure out. What do you guys mean by consistently? Normal everyday driving, shifting at about 3k rpm tops, shouldn't have that much stress on the engine...?
hey if you are gonna drive like that, why bother getting the extra hp? Might as well drop in a V6 and save fuel
Seriously, spend some cash, Haney has forged kits for $1800 then you dont have to worry, even if you decide to bump up the hp even more in a couple of years (much cheaper than the price to repair if you grenade your engine).
+1. Do you really want to be out driving thinking about if your rods are about to break? No! You wanna be thinking how hard should I slam the throttle through this corner or what-not...It's so worth it to spend a little extra and build the bottom end up so you can drive it like it is supposed to be driven!
You can probably get away with up to like 490 safely, but it all depends on the tune and what you are running. I personally went in and talked to the guy at Brenspeed and he said with a supercharger with the more bottom end its closer to what everyone is saying about 450, but if you are running turbos and have different levels of boost and adjustability, you can almost hit 500 and be completely safe under warranty. But hey you never know, you could get that one defective piston or crankshaft that could have just barely passed inspection from the factory and could all the sudden just snap on ya and make for the ****iest day ever. My opinion just like everyone else is dont push it unless you want to show everyone how you blew a hole in the side of your block.
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quote:
ORIGINAL: Saleen05797
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?
Is your car still sitting at the dyno shoppe and wont start?
Nope, it's back at my guys shop (got towed on friday night). I haven't had a chance to talk to him in detail but theres no fuel pressure, so it's either the fuel pump, the fuel reset like polkthug said, or something to do with the fuel system.
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Dyno Troubles - 
.....sounds like the local shop/mustang folks would 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?
!!!
