For those who have had their ECU flashed on the 287hp standard engine, how many have beat the crap out of their car reving up to 7100 on a somewhat regular basis?

I haven't been doing it mainly cause I'm so lean right now and want to make sure I'm tuned well first

but those of you that have done it, what is your whp and how much do you do 7100rpm?

anything bad come of it? Anything break?

 

sentry:

I have been doing that all the way to 7200rpm at the regular basis.. but I have the nismo conrod bolts replaced and running with motec computer and it is running good without any prob!!! And I reckon even with the standard rod bolts, you shouldn't have any issue either!

cheers,

richie

 

I always rev to 7100 just for fun. When racing I always go to 7100 on the 1-2 shift, and almost 7000 for the 2-3. Sometimes when on the highway going 70, I like to drop it in 3rd and wind it out. Ive never had problems with it, also with heating up slicks at the track, and bouncing fuel cut over and over its fine. Proceed to rag the $hit out of your car

 

I hit 7100 probably 100's of times in the last year and half. I stopped after my motor blew. Now I shift at 5500-6200 on the track. I even took my TS Ecu out. I had it dynoed and it only produced 2 hp anyway. Very likely doesn't do much good to rev so high.

 

Why did your motor blow? Why shift before your hp peak, your that paranoid about it now?

 

yeah what are some details on your blown motor - that's exactly why I started this thread, to judge the safety of reving to 7100 a lot

 

How do you actually blow your engine and which part of the engine let go?

ANd also you are saying that the TS ECU does not give much HP at all?

cheers,

richie

 

I did not get a satisfactory answer about why my motor blew.

I'm only mildly parnoid about it now. My track times keep going down without reving to peak. As long as they continue to fall, I'll stick with it. Plus I'm not racing for money yet, so I might as well save as much of the car as I can. Its good habit to go easy on the equipment. I learned that the hard way.

 

Yes, the TS flash gives very little hp. I dynoed my car with TS ecu, shut car off, plugged stock ECU in and redynoed within the span of 5 minutes. Stock ecu made 2 less hp and 1 less tq, plus TS still only opened to 83% like stock ecu.

 

A friend brand new mustang cobra with 2000miles blew it's rear differential on stock everything(tires included) at it's ~10th run at the dragstrip. Differential blew so hard it shredded half of his exhaust.

one could assume dragstrip is a bad habbit...

Turned out differential was defective...

Unless you can pin-point the cause of your engine failure, it's all speculations. Could be TS, could be anything else.

 

+1 I know the Technsoquare ecu maps are tuned/althered (all 3 maps) but my car felt much stronger a few days after installing it. Maybe you should have waited to dyno. I got decent gains from it. What was your a/f like? Why did you suspect the ecu did it? Even if you didnt get a definite answer what were the symptoms of your blown motor? Was it burning oil? Did you have issues prior to ecu? Were you racing when it "blew" ? So many factors it is unfair to assume the ecu did it, Id really like to hear how your motor took a $hit. Never had problems with mine n/a and Ive ran the **** out of it at over 15.2:1 a/f, way lean.

 

Sounds to me like he's blaming the revving it to 7100rpms hundreds of times and not the ecu necessarily. From the look of his avatar (and having read previous posts) I don't think zillinois is into drag racing.

 

Z350Lover, how expensive was it or how many hours did it take to switch out the con rod bolts?

 

sentry:

you gotta take the engine out to do the job, then unbolt the bottom end to reach the bolts.... so you might as well do other things internally as well!!! Make your money worth a while...

cheers,

richie

 

Zenophile is right, I'm not blaming the ECU. I just took it out so I wouldn't be tempted to rev. Plus, I was getting a SES and I narrowed it down to either the Tilton or the ECU. I had gone to the dealer to have the check the SES and it came back random misfires. As for waiting to dyno the ECU, I dynoed the it after about a year. It was as good as it was ever going to get. Even TS claims that the flash doesn't add much hp. However, I'm not down on the ECU. Since I don't rev that high anymore and it didn't dyno much hp, its not worth having on the car. Plus I haven't had a cel in about 2000 miles.

I probably have 100+ drag slips sitting on my desk right now and have probably done another 100+, 0-60 runs. I ended up running a 13.3/104 -1/4 and a 5.0, 0-60 on street tires before I quit doing drags etc. Last year I also blew the clutch and flywheel up. This happened during road racing, but it was very likely the result of too much drag racing. As someone mentioned it is brutalizing to the car.

I still take my car to the "real" track regularly though. I just don't wind it all the way out. When I blew the motor, I was coming out of a corner and getting back on the gas. I thought I heard a knock or vibration, but the car in front of me had a incredibly loud exhaust and so I wasn't sure at first. But I kept on the gas, thinking it was his exhaust. (Later he was kicked off the track for exceeding the allowed decible level!!) As I got on the straight, the power started to fade and the rod knocking became very evident. The motor stalled and I managed to make it off the side of track and that was it. The safety crew checked for oil spillage before they towed it onto the track and there was none. A guy behind me when it happened said he saw a fireball and puff of smoke come out from under my car. That's all I know.

Since I drove the car hard, I had switched to synthetic oil and changed it regularly. The dealer simply said that the block had a hole in it and that the rod had broken. I asked for more details, but thats all they knew. I would really like to get a look at the motor to try to get some resolution on the issue. Until then, I'm going to be taking it a little easier on the old gal.

Along with going a little easier on the car, I bought the rod bolts and I'm going to be getting the APS oil pan for just a little more insurance against this happening in the future.

 

Are you concerned with the heat generated with racing or the g-forces?

 

zillinois, where were you with that post about the stock clutch being weak? LOL. Sounds like you got quite a good run out of it before it went. Halfway through reading your post I was going to suggest the APS oil pan. Should be good insurance.

Anyone who tracks his car that often has my respect...hmmm, reminds me I need to spend more time in the Road Racing forum learning from the masters.

 

zillinois,

I have that same misfire code too - right after my ECU was flashed. hmmmm. TS told me it was the clutch or that the SES was normal. If it WAS the clutch, how come I never had the SES before with th stock ECU? That's it, I'm ditching my TS flash and going with the limited spec. I'll do my own tuning with the emanage ultimate. Man that flash is a bunch of crap!! I've been driving on it for 9 months with the SES light thinking it was just the ECU doing emissions crap. When They flashed it, they said it has a lot more torque now. I drove away and actually didn't notice crap, but figured surely there had to be a small gain at least.

Also, zillinois, I know you have the tilton clutch - is that the clutch you blew up or was it the stock clutch?

btw zillinois, what were the mods you were running for your 1/4 mile times if you don't mind me asking?

 

because I'm curious, what about reving to 7100 with a supercharger or TT?

Can FI kits handle 7100rpm ok? I'm mainly curious about a supercharger belt handling that rpm

 

I must have missed that thread! I don't know if I'd say the stock clutch is weak. But at least I can say I found the limit. ;-)

We really do have a good road racing forum. Lots of experienced tracksters with good info and reviews. Reading posts from Daveh, John, Commasense, Enthuz, Stack, Skrill and the whole crew are the favorite part of my day. Except when I'm thrashing the Z of course!!