Supercharger - how long can it run constant?

[TurboRA28]

G'day , I was wondering if anyone knew how long you could safely run a 1GGZE supercharger for? I'm taking a guess they after long periods of time they would get quite hot?

Reason for this question is i'm throwing around lots of ideas of what engine to drop into the 4runner.. A 1ggze is one of the contenders. But I do a lot of beach driving and i'd imagine the SC would be on pretty much constantly with that kind of sand driving.

Wasn't sure what would happen after an hour of boosting?

Cheers
Joel

[RAd28]

i'm confused already... i thought a supercharger was boosting when ever the engine was on... so i'd imagine it should be able to cope with long running with out drama, providing the oil lube/cooling is in check, i can't see why it WOULD have a problem

[TurboRA28]

Only when the clutch activates, which is memory is correct thats around 2 inches of merc or so? Just before you reach atmospheric.

[Hen]

Nope, clutch switches well before that. On at 8" mercury I believe (for 4AGZE, assume 1G is the same-ish).

From what I've seen/heard, SC constantly on is no worries. There are a lot of "melted teflon" and "siezed bearing" stories, however I've never seen one first hand. And I know of a fair few rigid SC pulleys or constantly running clutches.

My SC gets silly hot after a good arvo of fun, and its been running like that for a couple of years.

Hen

[RAd28]

ahhh... clearly forgetting about the clutch...

[TurboRA28]

Ok cool thats good to know.. So the occasional hour or so of pretty much constant operation should be ok.

[Hen]

So the occasional hour or so of pretty much constant operation should be ok.

Hell yes. Before I got my SC properly setup I used to bridge my SC relay for drift nights and run it like that for 4hours of abuse (and sometimes the drive home if I forgot about it).

Plus I feel Toyota would never have let the 1GGZE leave the factory if an hours sand driving with a stock engine was going to kill the SC.

Hen

[feral4mr2]

From what I've seen/heard, SC constantly on is no worries. There are a lot of "melted teflon" and "siezed bearing" stories, however I've never seen one first hand. And I know of a fair few rigid SC pulleys or constantly running clutches.

My SC gets silly hot after a good arvo of fun, and its been running like that for a couple of years.

Hen

indeed, i've run a fixed pulley s/c that had been used that way for 2 odd years before i got it.
i would be more worried about the effiency of your i/c. i run a w2a unit in my turbo feroza, to me high revs etc at slow speeds while duning/beach driving, the w2a unit was a better i/c set-up to run.

[Starfire]

Constant is no problem. What kills the toyota chargers is running them too fast for a long time. (over 12000rpm or so).

[Cameron_Datto]

If you DON`T run the Air Bypass Valve , they also over Heat at Idle

[feral4mr2]

really?? i've never had any such problem like that, or ever heard of the many others that dont use a ABV having any such problem.
i would consider recirculating compressed air would cause more heat (eg. useing the ABV), than the air being drawn through into the engine.

[Cameron_Datto]

really?? i've never had any such problem like that, or ever heard of the many others that dont use a ABV having any such problem.
i would consider recirculating compressed air would cause more heat (eg. useing the ABV), than the air being drawn through into the engine.

I was running the supercharger constanly with out a ABV , After 10 minutes with the engine running at idle speed the inlet air temp would rise to 100 deg , The hot air temps caused the super charger lobes to JUST touch the housing enought to cause a rattling noise only when it reach the high air temps , I fitted a the factory ABV , and dropped the air temps at idle speed to a Max of 65 deg and never had any Supercharger Rattle since . a 40 deg drop in air temp at idle is going to make the super charger live longer ,

[Starfire]

Ive never had any temperature issues and I have no ABV.

[brett_celicacoupe]

you could always setup some kind of pre SC water injection. it might help to drop the SC temperatures.


team that up with a decent W2A intercooler and it should be fine

[Cameron_Datto]

You Will get improvement in air temps at idle with a ABV , Above idle i have no Air temp issues as i using a huge Air to Air intercooler , Other Makes of supercharger systems also use a ABV combat the air temp issues at idle aswell ,