Blew my motor

[wht95scort]

110 is leaded gas. It will destroy your cat if running one. 100 is all you need to run and is un-leaded. Gas wont make a car blow up either if anything its going to help it from not blowing up. It helps prevent deto. Id say either too much boost, bad tune, lost oil psi exc deff engine parts related not gas

[TurboProto]

Well there is no cat on that car first off, second the car was tuned, third the motor had 180k. When we pulled the head off cylinder #'s 2-4 were burning perfectly. Cyl #1 had a lot of carbon build up and the cyl wall was grooved pretty badly. I think that cyl #1 was damaged probably with a loss of compression and the combo of the gas, irridium plugs and msd ignition, and the boost, didn't help.
He was runnin 9.5's at the track before we went home. I say its gas related and mabe timing related.

[jamaican]

does this mean my BP could blow like that if i plan to boost it?

[wht95scort]

Well there is no cat on that car first off, second the car was tuned, third the motor had 180k. When we pulled the head off cylinder #'s 2-4 were burning perfectly. Cyl #1 had a lot of carbon build up and the cyl wall was grooved pretty badly. I think that cyl #1 was damaged probably with a loss of compression and the combo of the gas, irridium plugs and msd ignition, and the boost, didn't help.
He was runnin 9.5's at the track before we went home. I say its gas related and mabe timing related.

ring prolly broke in cyl one causing the scoring on the cyl bore...deff sucks hope you get it up and running again soon

[wht95scort]

does this mean my BP could blow like that if i plan to boost it?

Yup anything could go wrong even with a perfect tune. But the BP's are a good foundation to build off of.

[madmax_2069]

yea you could change out the stock connecting rod's and pistons, wich would handle 110 racing fuel. 110 burns real hot and produces a faster bigger explosion. wich the stock connecting rods and pistons cant handle. see if you want to run boost and 110 fuel it would be a good investment to replace the stock connecting rod's and pistons that way you wont blow the motor as easly.

[neuspeedescort]

the real question is did you make any good passes?

also 110 is a cooler burning fuel. the higher the octane the slower cooler burning it is. it helps retard your burn cycle with out touching your ignition. do the math why do boosted car have higher timing marks and run higher octane fuel. when stock cars run lower octane and lower timing. compression has zero to do with this issue.


NEUMAN

[Jho]

Exactly.

The higher the octane of the fuel, the slower, more complete combustion is. This means that detonation is less likely. Lower octane fuel ignites much easier, and carbon build up, such as in the motor that were duscussing, will get red hot, and will cause detonation before the spark can ignite the mixture.

My bet is that it had something to do with the carbon build up in cyl. #1, and the boost was the stick that broke the camel's back.

[TurboProto]

He only made a best run of 9.5 and Im asuming around the mid 75mph range that night. We both had traction problems and it poping out of gear in both of our cars. but no excuses. Its running now and we will have to see it get spanked by my car this thurs. Ill get some video.

[TurboProto]

Exactly.

The higher the octane of the fuel, the slower, more complete combustion is. This means that detonation is less likely. Lower octane fuel ignites much easier, and carbon build up, such as in the motor that were duscussing, will get red hot, and will cause detonation before the spark can ignite the mixture.

My bet is that it had something to do with the carbon build up in cyl. #1, and the boost was the stick that broke the camel's back.

I know this is a really late reply, but I was bored.

You can tell from the picts that #1 is more carboned than the rest. Luckly the cyl looks like it has no visable damage, but only a machinest can tell the truth.

[Jho]

That block got

[XxToKeSxX]

Holes in the block, always a good thing.

more ayer flow yo!

It's fixable!!!

[Franko]

Holy old post..

He definately detonated that engine..

I dont know what he is running for engine management, but unless you have some kind of standalone there is absloutely no point in running crazy high octane fuel.

10-12 psi? Holy lord! What turbo did he have on it? Unless its off a mac truck its definately a tuning problem. 110 octane would be fine if he was tuned for it.. but you cant just crank the boost up and think that higher octane will be a band aid for a bad tune.

Anyone know what his setup was at the time?

[TurboProto]

Holy old post..

He definately detonated that engine..

I dont know what he is running for engine management, but unless you have some kind of standalone there is absloutely no point in running crazy high octane fuel.

10-12 psi? Holy lord! What turbo did he have on it? Unless its off a mac truck its definately a tuning problem. 110 octane would be fine if he was tuned for it.. but you cant just crank the boost up and think that higher octane will be a band aid for a bad tune.

Anyone know what his setup was at the time?

I guess you didnt read the previous posts. The motor was a stock bp05 with 180K+ miles with a complete bp26 turbo setup, fmic, Denso Irridium plugs, and stock 94 ECU. The car ran fine at the track until we upped the boost on the fwy so he could keep up with me and then boom! I was runnin the exact same gas as he was, and my car ran crappy around town but it loved wide open thottle. His best run that night was a 9.5 @ 77 mph and mine was a 9.30 @ 80 mph. In the 1/8 mi.

[matt_figet99]

#1 cylinder?

Why is that that its always the #1 that shoots when an engine goes... maybe I've just been seeing a lot of that lately... on any engine.

Peace,

The reason you always see cylinder #1 go fist is, because cylinder #1 runs leaner then the rest of the cylinders causing it to get hotter. Which then it will ignite the air/fuel mixture before the piston comes to the top of the cylinder (pre-ignition) causing it to fight the crank and snapping the cennecting rod.