Some language in the beginning of a song and then from me when I thought I blew up my car or almost crashed on video.
I was not particularly happy about the fact that I had 2 passengers, one of which was siting on a pillow in my non existent back seat. I said that was a no go but I was not listened to.
10:1 Junkyard destroys drag radials and BLOWS UP - Car Videos on StreetFire
You can skip the first 2 minutes if you hate politics/jokes. It makes me giggle. Trying to go with a theme for fun. Video is better then some previous ones because I don't have to use windows movie maker on my old slow desktop. Ick. Premiere on new laptop
The SOHC did 445whp on 5 cylinders and 10.5 AFR on 18 PSI. Probably did well over 500 on the run that didn't record. The car was insane on the road, definitely more responsive then when I had my low compression motor running 20psi.
This is a 190,000 mile 12 valve 10:1 diamante motor. I am trying a different ghetto O ring trick that failed on the last dyno pull (could have failed at any point I guess). blew out the O ring and instantly dumped all the coolant the motor + had a fire.
The motor is still ticking. As long as I don't put coolant in it, its fine :P
I didn't even realize this happened (well the fire was obvious) until I watched the video. I thought it was just head flex. Then I put coolant in and...fail :P
Pretty damn Impressive IMO. If this motor hangs around its going to be running 10 second 1/4's on less then 20psi boost. Megasquirt II harness is finally built, so I should be reving to 7500+ next year.
We recently found out that G54b (2.6L mitsu in starion and minivans) valvetrain parts and valves can be used in a SOHC. (the valves are HUGE oversize valves and the springs are a double strength upgrade and some of the minivans cam factory with solid lifters (if the lifters start collapsing).
I was planning on running 10's on a bone stock 8.9 motor but I think this will still be a lot of fun, especially when I get the cylinder head seal issue worked out better. I am trying ghetto methods right now so I can at least say I tried them. Copper wire superglued to 95mm cometic worked great until it blew out. Wire was really thin so it couldn't take much abuse. My next trick may be a thin steel wire (about .07" thick ish?) on a DOHC MLS. The stock motor doesn't have a huge overbore so there is NO reason to use the 95mm comejunk. The worst thing about O rings is that they will sit out even farther then the gasekt so you might have a simulated 97mm bore showing huge weaknesses in the cylinders head.
The sohc cylinder head is definitely weak. If the ghetto stuff doesn't work, I will combine the ghetto stuff with a partial filled 12v cylinder head using devcon, then drilling out the coolant passages. The 12v head is completely hallow and just doesn't have the strength to hold up to extreme cylinder pressures. My guess on my Built motor holding 20ps decently well with just a 95mm cometic is that the 7:1 compression kept actual combustion pressures down. The 10:1 motor is much harder on the headgasket, even on less boost.
There is a good chance the 3rd time I hit 24psi boost (which damaged 2 plugs) also damaged the ghetto O rings and that cylinder just happened to "blow out" on that final dyno pull.
The accidental 24psi boost runs were probably 600+whp territory on this high compression motor BUT my front exhaust manifold (stock chrysler) has been leading me to see higher temps in the front cylinders so I think the 500+ range is not safe for this motor until I have an nice front manifold that doesn't cause massive reversion. the last motor that blew wrecked the front bank and its certainly because of the rubbish manifold. Anyone who has seen the chrysler SOHC front manifold should understand. It's not even a good part when the engine is bone stock.
Nobama and Great Depression Racing
