Short story my water meth injection pumps keep failing. Seems they last about once a year. Anyone else seeing that or am I just lucky?

Skip to 8:30 if you don't care for all the supercharger stuff


Here's the rebuild. Only took an hour and a $3 bearing but not something I wanna have to fool with once a year...

 

No one else running meth injection?

 

The only other one I know that was running it was @Texas_Ace They have a stickied thread about their system. Might be worthwhile to PM them directly.

 

I randomly ran across your youtube video of the rebuild the other day lol.

I had to pull my supercharger off a few years ago due to the bearings going out, sold it with plans to go turbo but then never had the money to finish it. So just been running NA the last few years and hating it.

I had a pump fail at one point but it was a seal not a bearing, it was also the older sureflo pump design.

 

Thanks Texas_Ace. I remembered you were big in to meth injection at one point. I guess these trucks are getting enough age on them that there's not much info discussed on them anymore. Someone on the channel with some experience with pumps suggested the methanol was probably eating up the seals, but disassembling the pump it didn't appear the issue was on the pump head side, but rather the coil side like water was literally making a bee line straight to the bearing somehow. Anyway someone else said their Devil's Own pump was on the truck for 14 years and still going strong but his was mounted in the engine bay so hopefully me sealing this most recent one up good will make it last.

 

I know that you need to have the right kind of seals in the pump or the methanol will eat them for sure. This was a common issue on the older pumps.

The other issue is if any hydrocarbons (aka gas, oil etc) get into the pumps with the correct methanol seals, the hydrocarbons will eats the seals. Thats how mine died, somehow I got some contaminated methanol and shortly after the seals started leaking.

Still a massive fan on methanol injection when E85 is not available. If I had E85 though not sure I would bother with it except in unique cases like the 4runner where it provided the extra fueling I needed way easier and cheaper then a 7th injector.

The more methanol I gave the 4runner the happier it was. I was running a 14gph + 7gph as my final setup IIRC. I tried 2x 14gph and while it worked great up top it would bog at low boost so hard to step down a bit.

 

Yeah getting mine dialed in was a bit tricky. Like you said bogging down low while being great up top. I think I've just got a single 7gph nozzle on a progressive boost referenced controller. I normally see 20 deg of timing up top with it and the truck is VERY peppy with that and 11lbs of boost. Wideband reads 11.3 - 11.7 AFR at WOT which seems to keep it pretty happy.

 

Yep, very similar to mine, although I had removed the 7th injector so that is why I could run the 14gph as well.

It was a bit rich down low but once the stock ECU got used to it there was no real bogging and felt great up top with AFR's also in the 11's and timing in the low 20's.

My bearings died when I added the 2.0 pulley and was trying to get 13psi out of it lol. Should of stuck with the 2.1.

Course I also had the gen 1 SC.

 

My SC is gonna be due for a rebuild before long but still sounds great. I think it's coming up on 90,000 miles on the unit. I've been running a mix of -25 Wal-Mart washer fluid I grab on sale in the summer for .50 cents a gallon and I add a bottle of Heet. I think that gets me around 50/50 or 60/40 on the mix and is pretty cost effective. I'll be curious how the rotors look, been running that for about 4 years now.

 

My whole engine was super clean when I pulled mine off, intake tract, valves all of it was like new. Compression was better then when I got the truck as well lol.

 

I've been running a snow progressive kit since late 2016. I did put one if those rubber covers/boots on the pump and I haven't had any trouble since installation.