OEM. Not going to get "to" crazy with this motor. The car will be around 475 rear wheels when finished. Not planning on going much farther then that.
96 Cobra engine goes south.........
- Thread starter Poiznus
- Start date
OEM. Not going to get "to" crazy with this motor. The car will be around 475 rear wheels when finished. Not planning on going much farther then that.
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I was talking to the local Mustang guy this morning about some ideas. I'm still planning on rebuilding the engine when it comes in. Putting forged rods and pistons in there. Putting new valves and other things that may need to be done.
Problem is, none of this is going to help if the engine detonates again..........?
Problem is, none of this is going to help if the engine detonates again..........?
Problem is that by the time you start opening
an OEM block to stuff in the forged internals ,
I think it would be cheaper just to have gotten
a done long block. But if you put in the OEM block
keep the A/F ratio at about 11:5, and only use the best gas available in your area.
Also look into an MSD-4 system,you can take some timming out over 4000 which can help.
an OEM block to stuff in the forged internals ,
I think it would be cheaper just to have gotten
a done long block. But if you put in the OEM block
keep the A/F ratio at about 11:5, and only use the best gas available in your area.
Also look into an MSD-4 system,you can take some timming out over 4000 which can help.
Peter, you are correct. It would have been cheaper to get a done block, but I do not have a block to give them and it would have cost me much more because of that.
Does anyone know if the GT block is tha same as the Cobra? If so, I could put my crank in that block and have a safer motor?? A local guy wants to get rid of his 2000 GT block that has forged internals right now.
Does anyone know if the GT block is tha same as the Cobra? If so, I could put my crank in that block and have a safer motor?? A local guy wants to get rid of his 2000 GT block that has forged internals right now.
Thats true Booyah but detonation is not good in any motor
forged internals or not, I have a friend who punched a hole in a forged piston after he said was the only occurence. If you have one detonation you will probably get more. You need the right
tune no matter what.
forged internals or not, I have a friend who punched a hole in a forged piston after he said was the only occurence. If you have one detonation you will probably get more. You need the right
tune no matter what.
Poiznus, did your mechanic determine what actually
happened to your block- you said a chunk blew
out, did a rod go?
happened to your block- you said a chunk blew
out, did a rod go?
That's why I say "shouldn't". If you go dumping another 8 psi on top of the old setup without a good gradual tune then you are asking for bad news. And from personal experience I would also like to recommend letting the computer do most of the work as far as enrichment methods. Why, because mechanical enrichment can malfunction and still operate causing some serious problems. If the chip craps out your car more than likely(99.5%) won't even start. Just my opinion.
I'm going to post a few pictures. I have not done anything with the car yet. I took these pictures a few minutes ago...........
Another
Last one
I guess a picture is worth a thousand words!
That some serious damage!
That some serious damage!
Was that once a rod in one of your pics?
Poiznus- Did the pistons show signs of detonation
such as holes or cratering?
such as holes or cratering?
a gt motor has a weaker crank they are not the samestock.
unless it has an aftermarket crank the cobra crank is the way to go. unless you have a lot of money then you can go to a stroker crank from shm or modmaxbut they are very costly.
unless it has an aftermarket crank the cobra crank is the way to go. unless you have a lot of money then you can go to a stroker crank from shm or modmaxbut they are very costly.
Peter, I have not looked at the engine at all. But, it should be taken down in the near future. I really do not have time to deal with the mess right now. I'm very interested in seeing what happend in there though. I will take pictures and post them when it is apart for you guys. :thumbsup:
Sorry, I didnt want to drive you crazy, but I think it
would be good for you to have some clues as
to what happened to avoid this in the future-
it may have been very lean- blew off ring landings
I have seen that happen with aggresive tunes.
would be good for you to have some clues as
to what happened to avoid this in the future-
it may have been very lean- blew off ring landings
I have seen that happen with aggresive tunes.
Peter, I'm always open to anyones ideas. I'm pretty sure it was not running lean though. In fact, I checked the oil right before it blew and I could smell traces of gas in it. So, I think it was dumping to much gas causing it to go past the rings or I had a leaky injector. May have had a bad ring land at that time also. I'm going to do a few things differant so this will not happen again.
This is the dyno from a while back at #8 Psi. The only differance is I had #11 Psi on it when it blew.
This is the dyno from a while back at #8 Psi. The only differance is I had #11 Psi on it when it blew.
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