Forcefed86

iTrader: (4)

I used a caspers volt booster... It didn't do a thing to my voltage. They also wouldn't take it back. Bought another car that had one installed and I had a similar experience. No noticeable difference in voltage with it on/off. Great product if it actually worked... maybe others have had better luck with it on LS alternators? I have 2 in my junk drawer now.

stevieturbo

If you see 50psi in the cooling system, you've already had major sealing issues ! and lucky the radiator etc havent blown up.

IMO after monitoring healthy cooling system pressure....if you ever see anything around 5psi above that, there is a problem, I wouldnt be waiting until 50psi.

Have a safety trip set fast and low, unless you're not worried about doing damage or emptying water ( ie finish a pass at all costs for racing etc )

M_Minnick

iTrader: (1)

50 psi is a number I got from Scott Clark. This would only show on a datalog, as it is only happening for an instant, otherwise the pressure would vent out the radiator cap. I think 5 psi would not show up very clearly in a datalog, as I would think the pressure would have some fluctuation during normal operation. I think the 50 psi spike would let you know you are on the edge of head gasket stability, and would hopefully be able to find the issue before a major failure.

Mike

stevieturbo

5psi or any rise will show up crystal clear, and as I said, you need to find where the system normally runs at, which will be different for every vehicle and temperature it runs etc...then set a threshold above this.

And the caps do not open as quickly as you think. Even say a 15psi cap might take 30psi before it initially breaks free, and this may take 0.1-0.2s before it does, and can only release so much water/pressure. Although obviously you'd want to avoid that altogether.

A 50psi spike...just shows it's already fucked.

RonSSNova

iTrader: (3)

It's fine to blow coolant all over the dyno room.
It really sucks at the track, at speed.
makes me think our standard radiator cap/vent/catch tank are rather inadequate.

stevieturbo

Most cars do not have any means of preventing water going everywhere in the event of major over-pressure.

The small dopey OEM overflows etc will never catch it and many OEM pressure caps will just vent to their surroundings.

In order to prevent any water loss, there would need to be a substantial tank to collect the water AND a route for that volume of water to flow to it at high pressure when it blows. Not really that easy to achieve.

Hence if you can prevent it blowing off in the first place, or at least prevent it blowing off and allowing the engine to remain at full power....you have a better chance of keeping it all clean/safe.

Blown06

iTrader: (32)

Do I need to post up the crazy vid of how inadequate the overflow vent line is in a lifted head scenario?

RonSSNova

iTrader: (3)

Ha! No you don't, it's pretty easy to figure out what it would look like.

I was just remembering the one time I pushed water pretty good, it overflowed my catch can but did it mostly on the return road. I honestly had no clue until I parked it and saw the puddle.

ssmonte7875

I understand what you're saying about the over flow line not being adequate, but I would love to see the video

stevieturbo

I've seen people route the vent to their windscreen. That way if it blows at all..it should be fairly obvious to the driver.

I guess it is better than it dumping directly to ground too.

kbracing96

iTrader: (25)

That's what we did with circle track cars so we knew it was getting hot.

Blown06

iTrader: (32)

Ask and you shall receive. Gopro is mounted low, looking up at the radiator/cap/overflow vent line. Flash light was zip tied to the blower bracket. If you have never seen this video.....it's worth watching how stupid this thing got.

Blown06

iTrader: (32)

Some things to note in the vid. This was a 1/4 mile pass and look at those headers in the top left corner.... lol

helga203

Lol i guess you don't need a meth kit to get the IAT's down. Haha

Blown06

iTrader: (32)

I was the craziest thing when we did that video. The truck wasn't running good that day (imagine that, lol) and every time I got back to the pit, you could see some minor amounts of water that had dried under the hood and a little bit of a water trail on the front fender. What was happening is that due to the heat this thing generates plus driving it back to the pits......most if not all the water had already dried up. So we would have never guessed in a 1000 years that it was doing what was shown in the video. Once we go the video off the camera, every ones jaw was pretty much on the floor. We had no idea it was this bad. Upon tear down, the head was lifting and pushing combustion into the cooling system from 7 of the 8 cylinders.

roastin240

iTrader: (13)

Holy ****. I will have to keep this in mind. After seeing this, I think I am going to put a pressure transducer in the coolant system and wire it into my MS

jaydubb

Well damn...

Blown06

iTrader: (32)

Excellent idea

ssmonte7875

Wow! Thanks for sharing

Stew63383

subscribed