I seen pictures of the rod last night. At first I thought, maybe the head lifted, coolant entered the cylinder and thats all she wrote. JR and Karim both told me the head gasket looked flawless and the ARP's checked out fine. The problems arent the eagle rods, im one of the handful of guys who made over 600whp w/them, another local made 636awhp/535tq w/his revving to 9200 on the 1-2,2-3,3-4. Eagles rods in the past DID have some durability problems (pre-ARP2000 rod bolts), they've since corrected the problem and people are making good power on them. I did however ask JR & Karim to find out what kind of AFR's were run prior to this rod being bent on E85, as well as IDC's & timing #'s.. this could be all we need to know to find out what happened, this might make your statement hold true which im not doubting one bit. Even a picture of the spark plugs would be a good diea. It just sucks to see Karims motor end the way it did...

 

who tunes the car

 

Jerry you do understand slightly the wastespark ignition systems that the cars come with from the factory but I hold your statement to not make any logical sense of the destruction of your motor or karims motor. The wastespark fires at BDC which is correct but when the plug lights off, the exhaust valves are open, this wont create any "load" on the pistons/rods, this wont create any kind of "compressive force" because simply with the exhaust valves being open, there isnt any compression in that cylinder. Unless your stock ignition system works different then mine does, im sure you will rethink your explanation.

P.S. Its good to see you on dsmlink forums.

 

guess im the only one that thinks a Bent hbeam is sexy can i have it?at least the wixecos held up that says alot!!! call Eagle you might get a free replacment tell them man DEFECT

 

Sorry I didnt explain it clearly. wasted spark doesnt happen at BDC. It happens at TDC at the end of exhaust stroke. its not burn gasses being expelled but an ignitable mixture since there was a mis fire (no fire) . The exhaust stroke doesnt empty cylinder completely and at top of exhaust stroke there is enough fuel/air to be ignited. as piston goes down on intake stroke more ignitable gas/air enters chamber. but it enters into a chamber that is burning. The piston is traveling down bore on intake stroke but the mixture entering chamber is burning at same time. there is no exhaust valve open this round when the piston is traveling back up bore. it is now compression stroke time. the hot expanded gases are very hard to compress. the piston end pushes rod down on its end and crank is pushing up from other side . rod is very easy to bend like this. pre ignition is far more damaging then detonation. it happens much quicker and is harder to detect because there will be no knock noise. detonation happens when pistons are at or very near TDC. the crank pin is not in a position to be rotated so the compression usually lifts head and blows gasket. when that happens there is no real stress on the rod. it is in its strongest position and the lifting head releases the excessive compression. pistons get hurt and rod bearing get beat on but rods survive just fine. hope that clears it up a little better for you.

 

Aluminum Rods FTW! lol

 

I understand the differences between detonation and pre-ignition. I do see what your saying about air/fuel entering into a cylinder that is burning w/unburnt fuel left over from an misfire, if this happened on pump 93 octane id agree all night long, but I was told this happened on Ethanol, which is a little far-fetched to believe, also I wasnt aware there was any misfires when the tune was conducted on E85. I cannot see ethanol pre-igniting just because of the properties of the fuel itself. If we both take a look and compare everything what were saying together, I think we'd both agree whomever tuned the car did do a shitty job. Id love to take a look at the AFRs, timing maps that was done on the run the motor died. The tricky thing about tuning on ethanol is you CAN GET AWAY with so much, so much where it can be detrimental to your motor. The omplete opposite can be said o tuning on 93 octane...you will find your limits very quickly on gasoline before you know it you will find the knock threshold where timing and boost just dont want to "be friends" any longer.

P.S. Jerry how do you like that dsmlink so far? Im assuming your running V3? Going mitsu maf, gm maf-t or SD?

 

yes this was on e85. I was there to hear the misfires. e85 is far more likely to pre-ignite. dont have time to right a 2000 word essay on the hows and whys. is is suffice to say bent rods are common on alky and misfires. this is exactly why I never ran stutter launch on yellow car. 93 with meth injection is bad news under this condition. some guys in canada kept bending rods on the stutter box with their meth injected cars. if you hit 9psi on the line on the stutter and your meth is turning on at 5 psi you have a perfect condition for pre-ignition.

 

bad rod

 

lmao...