engine ping after torque converter change
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engine ping after torque converter change
Just installed a tci breakaway converter in my truck to match the cam and such and now the engine pings when it didnt before. any ideas why? I am running very high compression and did have to run octane booster with premuim off and on before but now it is defintly pinging more.
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keith black domed pistons, comp cams 4x4 extreme energy cam 270 duration 512 intake lift 532 exhaust lift, ported and polished heads, comp cams guide plates, comp cam double valve springs, comp cams retainer and lock kit, comp cams double roller timing chain, manley pro flo stainless steel valves, crane aluminum roller rockers, edelbrock performer rpm air gap intake, comp cams push rods, edelbrock fuel pump, 770 cfm holley street avenger carb, custom made 1 3/4 headers, 2 1/2 custom dual exhaust with 2 chamber flow masters, msd ignition box, msd coil, accel plug wires, k & n air cleaner. the block was also bored 30 over, and the block had the pistons put in, the gap measured from the top of the block and then cut to 0 to up the compression. i believe its right around 12 :1 compression.
thats whats in the motor, as far as timing ill be checking tomorow, i believe the initial is at 6 or 8 atm. the cam never gave a setting
thats whats in the motor, as far as timing ill be checking tomorow, i believe the initial is at 6 or 8 atm. the cam never gave a setting
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From: Troy,NY
12:1 with iron heads. That's probably the issue.You'd be in the ball park if they were aluminum. Try playing with the timing a little.Bring it down to 6 if it's at 8. You might also want to lower the total advance by chaning the spring weights in the distributor. There are a few guys here that are better than me with high compression motors maybe they will chime in.
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okay thanks allot, i just dont understand with the stock torque converter i had gotten the ping out of it, i switch to this new converter and it made it start pinging again, thats what confuses me the most
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From: Troy,NY
Chances are it had to do with the load on the motor coming in earlier and longer due to the lower stall on the stock converter. That's a high buring set up that really needs 100+ octane. I'll bet it pulls like a train from 3000 rpm up.
Hotshot
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From: Bend,OR
whats this motor in? 12.1 is crazy especially with iron heads. 11.1 is about as safe to go and still run 93 octane. also you may be a bit over carbed there as well. but we dont know what your doing with this rig either. racing or wheeling?
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its in a 1980 ford f 150 4x4, and i just use it back and forth to college and such. But i like to have fun with it on the street so
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Hotshot
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From: Bend,OR
i say sell the motor to some one that drag races and start over. that motor build for what your using for is way way wrong man. its cool to say all that though for sure. but really unnecessary and expensive to boot.
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possibly cant say i havent thought about that, but honestly my main question of this post is why changing to the new torque converter brought the ping back. I originaly adjusted the timing and got rid of the ping. i put the new tci breakaway torque converter in to get more in the cams rpm range and then got the ping back. Either way after readjusting the timing i did get most of the ping out of it. I do appreciate everyones help though
cant say i havent thought about that, but honestly my main question of this post is why changing to the new torque converter brought the ping back. I originaly adjusted the timing and got rid of the ping. i put the new tci breakaway torque converter in to get more in the cams rpm range and then got the ping back. Either way after readjusting the timing i did get most of the ping out of it. I do appreciate everyones help though
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From: Troy,NY
Like I was saying in my earlier post, Increasing stall and a better converter will have that effect. The vanes are straighter than your old one and it's putting the load on your motor faster. More load = easier detonation.
You could also try a carb spacer with 4 holes. Not the open kind. It will bring your peak torque level down a few rpm.
Hope it helps!
You could also try a carb spacer with 4 holes. Not the open kind. It will bring your peak torque level down a few rpm.
Hope it helps!
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