Detonation Sucks
09-10-2008, 07:24 PM
#1
Detonation Sucks First pass blew the tires off, Second pass I pulled the nitrous way back, still spun a little but cut a 1.42 60'
The 1/8 was ok down about 1 mph then it layed down hard on the big end, only trapped 135. It didnt show lean on the logs. Next pass it goes lean and detonates HARD. It appears the fuel pump layed down on me, I changed the pump but I cant try it until I get some more plugs they will be here tomorow. I cant believe that there are no signs that I pushed any water. How the heads didnt lift I will never now. Cometics dumdumdum. I wont know for sure until I lean on it again but every other time I lifted a head I new right away. I never heard it detonate like that before. Funny part is it idled fine with the plugs toasted. Sorry the pics a little blurry.
The 1/8 was ok down about 1 mph then it layed down hard on the big end, only trapped 135. It didnt show lean on the logs. Next pass it goes lean and detonates HARD. It appears the fuel pump layed down on me, I changed the pump but I cant try it until I get some more plugs they will be here tomorow. I cant believe that there are no signs that I pushed any water. How the heads didnt lift I will never now. Cometics dumdumdum. I wont know for sure until I lean on it again but every other time I lifted a head I new right away. I never heard it detonate like that before. Funny part is it idled fine with the plugs toasted. Sorry the pics a little blurry.
09-10-2008, 07:53 PM
#3
Id bet its rich and the back 2 pistons( probably the 2 plugs with nothing) have melted ring lands and the others have pistons that look like you bead blasted them with rocks on the exhaust side. id als0 bet the head has some damage around the back 2 plugs( probabbly not fatal). Leak it down now. If you had decent pressure on the seat it may have tuliped the exhaust valve. also.
a tell tail sign it hurt the piston is the grayish white smoke. It looks almost like tire smoke thats the oil burning with the nitrous . fuel is dark smoke like a deisel truck.
it will show signs of detonation but only cause it burned the oil.
a tell tail sign it hurt the piston is the grayish white smoke. It looks almost like tire smoke thats the oil burning with the nitrous . fuel is dark smoke like a deisel truck.
it will show signs of detonation but only cause it burned the oil.
09-11-2008, 06:44 AM
#5
Id bet its rich and the back 2 pistons( probably the 2 plugs with nothing) have melted ring lands and the others have pistons that look like you bead blasted them with rocks on the exhaust side. id als0 bet the head has some damage around the back 2 plugs( probabbly not fatal). Leak it down now. If you had decent pressure on the seat it may have tuliped the exhaust valve. also.
a tell tail sign it hurt the piston is the grayish white smoke. It looks almost like tire smoke thats the oil burning with the nitrous . fuel is dark smoke like a deisel truck.
it will show signs of detonation but only cause it burned the oil.
a tell tail sign it hurt the piston is the grayish white smoke. It looks almost like tire smoke thats the oil burning with the nitrous . fuel is dark smoke like a deisel truck.
it will show signs of detonation but only cause it burned the oil.
#6 & #8 are the one blown off.
It really was lean not rich. I ran it on motor after the nitrous pass and you could watch the A/F go up as the rpm did.it was at 14 when i got out of it.
As far as major damage from detonating that hard I am sure there is plenty. I just cant believe it didnt pop the headgaskets.
Tr8, 16 degree timing, 1/3 e85 with the torco fuel aditive
09-11-2008, 09:00 AM
#6
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Damn Ray that sucks, i had a set of plugs do that in my stock bottom motor do that, and it didnt hurt it.
Oh well, Is This is still with the old iron motor?
Oh well, Is This is still with the old iron motor?
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09-11-2008, 10:49 AM
#10
I have no idea. At this point I have no reason to pull the heads. It pushed no water. I only have to make it until the end of next month and I have plans to have Weber racing do another engine for me. Want to get away from the weight of the iron block
09-11-2008, 10:51 AM
#11
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you can get a nice borescope for like 100 bucks that will tell allot tho.
is the car still running good tho? if so, screw it. hammer down and hit it harder!!
09-11-2008, 11:42 AM
#15
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my buddy melted EVERYTHING i meen so bad it pretty much welded the plugs inside the head. we had to pull the heads and re tap holes!! and everything on top looked good and he ran it the rest of the season and it didnt loose anything.
then ive seen plugs come out just barly touched, but the pistion has a hole in it
09-11-2008, 12:41 PM
#17
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JL, even if you saw his motor, i know for sure you still wouldnt believe it. i have no clue how it kept going. lol it was funny as hell tho