detonation becasue of the chip?

iv'e noticed that during the heat of the day i have notice a little bit of detonaion when i take it into the high rpms i never heard this before the chip install, any ideas? it doesn't do it at night when it cools down a little bit. maybe i just got some bad gas?

Maybe it's Ford's flop motor showing more problems ?

I told you to do a custom chip on a dyno insteads of one of those run of the mill off the shelf things . Not every car is alike, now your chip probably has it running lean up high with the extra boost, and the heat just brings it out.

[quote:e384b2843d="Tang"]Maybe it's Ford's flop motor showing more problems ?

I told you to do a custom chip on a dyno insteads of one of those run of the mill off the shelf things . Not every car is alike, now your chip probably has it running lean up high with the extra boost, and the heat just brings it out.[/quote:e384b2843d]I agree, detonation is BAD! I knew a guy with a supercharged GT and he had a problem with detonation also, he eventually fixed it, but I don't know how.

The chip likely advances the timing. Add in the extra cylinder pressure due to the pulley. In the heat of the day, the air is hotter so your car is running hotter to begin with, plus the air sucked into the blower is hotter. Detonation is the result.

At night, the air is cooler, so the cooling system in the car can keep coolant (read: cylinder head) temp down, in addition to intake air being cooler.

I talked to a guy where I bought the chip from and he said that they hadn't really had to many problems like this but they have seen a few in hot weather. he told me to take it easy on real hot days :roll: he said if i was having sever detonation problems with it that the chip could be screwed up and if so they would replace it or refund my $$$ what do you guys think i should do and where do i get a diablo chip if i do return it? the car runs fine except for the detonation on hot days and i plan on going to the track this week since the nights haven't been to bad.

Kindof hard to have too many problems when there aren't too many 03's out there. Get one custom burned.

DETONATION is a KILLER. Be very carefull. AND, remember, there is something called SILENT DETONATION also. Don't feel to safe just because you don't hear it. Check you timing and read the plugs to see if you are running LEAN :cry: (not good).

Remember, rich is insurance.

The OLE MAN

I agree with the advanced timing idea.. most chips advance a few degrees. SC's need to retard the timing. Don't know if that motor has an octane plug like mine does... but if it does, pull it and see if that helps.

03 Cobra, I think BurnOut hit it on the head. I would find out what timing your chip has, and find out if it's more than stock. My GN has a slightly higher timing chip (20° vs stock 18°) and I will get a few degrees of knock retard on hotter days, where it's better on cooler days (running "only" 16 psi right now).
It will definitely be worse on hotter days because the charge going into the engine is hotter.
Are you HEARING knock, or do you have a scantool of some kind? By the time you can hear it, it's definitely bad. It sucks to hear, but I would definitely take it easy on hot days. How hard is it to swap chips??? Or like OLE MAN suggested, maybe crank up the fuel pressure to dodge that detonation. Good luck man!

Well yeah a chip gives you a faster timing curve and more total. You should get a chip that is made for a supercharged motor (More fuel/less spark lead). Even overdriving the blower with that pulley could even be enuff to cause detonation on it's own. What altitude you at? Detonation SUCKS! Not only are you losing power via detonation, but you are gonna break piston rings at least and hammer out ring lands and break pistons at worse!!!!

It just seems like to me having a chip burned for YOUR car would be better. Sure its gonna cost $400-$500, but damn you bought a $37k car, I'm sure you can afford a GOOD chip. No Offense

Dude, how does anybody already know the 03 Cobra good anough to have a cookie-cutter-chip out already? Sure they just didn't give you a chip for a 01 cobra? Get one burnt for YOUR car, don't blow money on something that wasn't even designed for your car.

Eh, don't worry about knocking, those little bits of metal on your plugs are just parts of your piston. :)

Seriously tho, try running premium gas if you aren't already. If you are, you're either gonna need to burn a new chip or up the fuel pressure (FPR, Better pump, etc). Also, if you're modding a forced induction vehicle, I'd *highly* recommend you buy an A/F meter... at least that way you'll have some idea as to what's going on in the combustion chamber. Unless you're running a wide-band o2, don't the A/F's word as true... but it's something that can tell you when things are leaning out before you end up blowing up the motor.

I would run an egt(exhaust gas temp) sensor before an A/F sensor. egt are more reliable and precise. but that is my opinion.

i gonna speak up becuase i have acess to ford rom tunning tools. it not hard to burn your own chips. youll get alot more satisfaction doing it for sure. heres a fews links but i dont think the eec adapter will work on you motor. eecv is a bit screwier then normal for ford. go here and look at the ford hardware

www.moates.net

hes got an adapter email him to find out if its working with eecv. also there are some links to tunning softare for your engine. spend the nessacary $500 to get started, next thing you know your freinds will be begging you to do theres.

see ya

Since this was brought back up, is it running right yet?

It seems to me, during the day, when it's hotter, you're just not getting enough dense air to meet the needs of the engine. This engine is (obviously) totally new in the way it runs and it's settings are quite different from older models. I'm thinking it also has larger factory injectors already (42's or so), so you should be able to get the needed fuel.

I'd contact Dallas Mustang, since you're in Texas and see what they know. They used to deal with UPR and that company burns chips (including Diablo) for cars in the shop. They usually won't mail a chip to someone. They really believe it needs to be done specifically for each car, and I totally agree when it's a Ford.

If you want to learn more, try this board. SVT site (http://www.svtperformance.com./index.php?)

dont get someone else to burn your chips do it yourself. mostly i would cut some timing at WOT and under boost.

There's simply no way to burn a chip to it's full potential without the aid of a chassis dyno. I don't recommend any other way for anyone. It's just like ordering one made for your car. You can't be sure it's correct.

dude i tune chips all the time without a dyno. get a gtech and head to the track. dynos can be just as deciving as anything else what you need to do it take everything into aaccount.

and im quite sure my chips are correct. but then agian thats subjective to what right for each engine is.

I probably wouldn't trust a Mike Wesley chip, without a dyno tune. That's just how I see it. You can't take everything necessary into account without having an accurate reading. Even the track won't do it, unless you have days to spend tuning things. That's what the dyno is all about though... Saving time. :)

But how do you burn the chip without a dyno, anyway? Seriously, what is your method?

well most ecms have a built in fuel trim feature like gms use BLM and INT when the engine is being correctly fueled and timed blm and int will stay at 128 across all operating ranges. every engien has a fuel tirm. so using the stioch meter allows you to tune for PT or part throttle. or WOT i use gtech the dragstrip and a wheel when i can get one. there are sevral very good quality pc based dyno track wheels that work very well.

anyways there are way to do it. things like AE or accelerator pump shot can all be tuned simply by liseting just the way you always did. best throttle response. ecm tunnign is more road time then dyno time. the only time you would really need a dyno is for WOT basically. thats when you rtunning for peak HP.

I'm in too much of a hurry to wait around for all the time it takes to get it right by that method. So I think the dyno works better. Of course, my car is carbureted, so it wouldn't matter to me for it anyway.