Just curious of how many engines you guys have blown have also been running meth.

I destroyed my rods with 450whp on stock block with pistons and coolingmist meth setup. Trying to decide to keep the meth or ditch it.

did the engine hydrolock because of the meth or did detonation kill the rod?

Maybe I don't understand the question but are you insinuating that meth is the reason your rods failed?

No I think I just had too much power for the stock rods. I would just like to find out how many engines that have blown have went that were using meth. Meth is supposed to be corrosive. Just wondering if it can weaken the parts.

Maybe I should have put this in the meth section?

I don't think your rods were exposed to methanol. If they were, there was a bigger problem with either your motor or AI nozzle placement.

^^agreed....rods won't see meth.

I was making 510whp on stock rods/CP pistons, just pulled my engine apart and the rods looked good. I have buddies making anywhere from 425whp to 490whp with stock engines.

Sounds like your meth kit failed for a second and the rod took the brunt of the detonation.

^^agreed....rods won't see meth.

I was making 510whp on stock rods/CP pistons, just pulled my engine apart and the rods looked good. I have buddies making anywhere from 425whp to 490whp with stock engines.

Sounds like your meth kit failed for a second and the rod took the brunt of the detonation.


I guess it's possible. But the logs didn't show any detonation at all when it happened and neither does the pistons. It just went within a second. I was having misfire codes leading up to that point. I got the injectors cleaned about a week before it happened and didn't have anymore misfire codes after that. I still don't have any idea what caused it for sure 100%.

I don't think your rods were exposed to methanol. If they were, there was a bigger problem with either your motor or AI nozzle placement.

yeah...meth definately didn't cause the rods to fail...this I will put money on.

It sounds like the same situation I had a few years ago with my 02 running a Zex 100 shot. Did you have NOS also? Sounds like you were running to lean or too high RPM's for too long.

JAy-R

not many rods fail.....that sucks.

im running meth right now.... no problems as of yet..... knocking on wood!!! :P

The meth would almost prevent that from happening since its making the air cooler and more dense so it prevents detonation. It could have been a meth pump failure or something. I would say to keep the meth and keep using it, just get some failsafes.

I guess it's possible. But the logs didn't show any detonation at all when it happened and neither does the pistons. It just went within a second. I was having misfire codes leading up to that point. I got the injectors cleaned about a week before it happened and didn't have anymore misfire codes after that. I still don't have any idea what caused it for sure 100%.

Did this happen to occur near redline for rpms?

I don't think methanol is corrosive its flammable. Thats why when you buy methanol there is a flammable warning placard or label, depending on the size of the container. We have 55gal, and 350 gal containers at my work and they do not carry any corrosive placards or warnings.

^^^methanol is very corrosive^^^
as far as fuels are concerned

according to a highly regarded tuner, meth puts more stress on your engine because air compresses, water/meth do not. the engine internals see an increased amount of stress because they are working harder trying to compress something that they werent necessarily designed for.
of course this is an engine builders POV who has longevity in mind first and foremost, and i am still planning to run meth myself :)
also, 450+ whp/tq is playing with fire on stock rods. some guys might do alright with it, some probably wont. i'm sure you realized that already though...

^^^methanol is very corrosive^^^
as far as fuels are concerned

Maybe deterioration, Ill check with my lab tech and ask him.

OK update from earlier. Alright I talked to my lab tech at work. And I'll try to give the info out as correctly as possible. Methanol itself as a chemical is not corrosive. But when intorduced into the compustion chamber with fuel and ignition there is a chemical reaction. In this reaction there becomes byproducts of the mixture. These acidic properties of the byproducts is raised to higer levels than with just fuel alone. These acidic byproducts will now breakdown the oil film that is on your cylinder walls and can pit them. And over time cause visual damage. The higer the rpm,s and more fuel, methanol introduced will also burn hotter. Thats why I think the 50/50 mix is better, for its cooling properties. Especially for a daily driver. He said if you run straight meth you might want to use a heavier oil and make sure you are using a good brand. And he also said coatings of the pistons would probably help also. To me this sounds pretty understandable.

had 506whp in 5th when my mahle pistons went....

but they are a very weak forged piston IMO.


running the aquamist set up with the large nozzle. 50/50 100% meth/distilled water

my new custom Arias 9.5:1, mahle 8.5:1, stock




http://i7.photobucket.com/albums/y294/brewpubeaver/the%20build/DSC_0017.jpg


http://i7.photobucket.com/albums/y294/brewpubeaver/the%20build/DSC_0012.jpg




and here is what caused my whole motor to be rebuilt....

http://i10.tinypic.com/29frn8z.jpg

according to a highly regarded tuner, meth puts more stress on your engine because air compresses, water/meth do not. the engine internals see an increased amount of stress because they are working harder trying to compress something that they werent necessarily designed for.
of course this is an engine builders POV who has longevity in mind first and foremost, and i am still planning to run meth myself :)
also, 450+ whp/tq is playing with fire on stock rods. some guys might do alright with it, some probably wont. i'm sure you realized that already though...


Not sure about meth, but 28psi on a decent AFR running 85% ethanol bent two rods on my last motor. Well it was that or the UTEC failed (not sure which to this day).

I now have a nice set of Crower's in there ;)

I know this topic halfway belongs in the meth injections NOS section.

From what I've gathered, all meth can be bad but a mixture is fine, correct?

Did the rod bolt fail?

After overheating my motor so bad teh head and part of the cylinder wall melted my builder noticed the piston walls were scored. I spoke to Steve (SMC) about this, wondering if the methanol could've "washed" the oil from the walls and caused this. It's his opinion and understanding that your motor would bog or cease to run if you were injecting enough methanol to wash the cylinders clean.

My blown motor came from a loose head bolt or bad luck - cooling system pressurized to the point that the upper hose blew off - temp gauge read normal until I was running on 3 cylinders, then 2, then none.

Basicly what everyone are saying is 50/50 mix is the best way with heavier oil should help it not detonation. I have heard plenty of guys having meth failure. I guess if anyone running meth should buy aquamist gauge device to see if its working properly imo. Btw i thought 100% meth help it not to detonation and its safe to use. I didn't think it would hurt our motor since its sort of like water injection.

had 506whp in 5th when my mahle pistons went....

but they are a very weak forged piston IMO.



I'll agree with you there, I am seeing more and more these pistons breaking on people, thats why I am going with CP.

When running Meth you need fail safes THAT ACTUALLY WORK, that can changing that mapping in your ECU on the Fly to keep it from blowing, thats why I am usig the Hydramist that Directly works along side of the Hydra EMS, other wise I think I may just have left it alone

The SMC fail safe will suit me fine.. since my EWG spring is only .7bar.

After overheating my motor so bad teh head and part of the cylinder wall melted my builder noticed the piston walls were scored. I spoke to Steve (SMC) about this, wondering if the methanol could've "washed" the oil from the walls and caused this. It's his opinion and understanding that your motor would bog or cease to run if you were injecting enough methanol to wash the cylinders clean.

My blown motor came from a loose head bolt or bad luck - cooling system pressurized to the point that the upper hose blew off - temp gauge read normal until I was running on 3 cylinders, then 2, then none.


You blew a head gasket from detonation. The combustion was then able to go into your coolant system (blows off hoses), and also blowing out on the deck, thus melting your head and top of cylinder wall (Flame thrower melting engine parts). That would be the order of failure.


Both of you guys take a good look at your rod bearings, they will tell the story. I bet the top half of the rod bearing got hammered from detonation. That's the most common killer for turbo cars. Really bad detonation will of course blow out the head gasket, or pop a rod. Been there many time.
http://www.t6p.com/forums/showthread.php?t=16049

Look familiar?

The SMC fail safe will suit me fine.. since my EWG spring is only .7bar.

is the smc failsafe out yet? ive been waiting to get one.

http://home.att.net/~alkycontrol/failsafe.htm

Here is a very popular kit in the World of Buick. I had an SMC also and loved it!

The pump comes with a fail-safe that must be REMOVED! (read about tehpump on site)
Julio (owner) is racing in a pumpgas/alky class in 2007 with Buicks. They are hauling azz with pump gaz!

You blew a head gasket from detonation. The combustion was then able to go into your coolant system (blows off hoses), and also blowing out on the deck, thus melting your head and top of cylinder wall (Flame thrower melting engine parts). That would be the order of failure.

But the gasket blew while cruising at ~90mph and very little boost - I was in 3rd gear (auto trans). I never heard any pinging - not until the end. Only one cylinder had any issues - number 2 - all others were mint. The piston in that cylinder was also in fine shape. My EGT's also never went above 800c. BUT, the head bolt where the gasket blew was loose when the motor was taken apart. And ARP studs were used, so there's a chance they weren't torqued properly.

SMC fail safe controller should be out VERY soon.. like a couple weeks if it's not out already.