14psi on 4agze

[LO01UX]

Ok kool

Thanx heaps terra and everyone else

[Duk]

I use a pre supercharger water injection on my twincharger set up.

[LO01UX]

I was actually just thinking bout water injection, how well does it work?

[Duk]

I was actually just thinking bout water injection, how well does it work?

Hard to say, my car doesn't use any post supercharger air temperature sensor. Propperly set up with IAT sensing compensation mapping it should yeild decent improvements, but I'm not in a position to do that.

[feral4mr2]

interesting pic of the munted sc. for years there's been IMO wives tales about sc's melting the coating etc. from running them too hard, 1st time i've ever seen any sort of photographic evidence. so that was from over running? and not anything going through the charger?

i've ran my sc12 at 17psi for quite some time with no dramas, and that's with a crappy stock interwarmer. the gze love's high boost.

[Hen]

I tend to agree with feral. I'd be happy to run an SC12 or 14 on a 4A at high psi. I've heard alot more talk of melted SCs than I have seen evidence. Sure, it could conceivably be a problem, but I haven't seen much to back it up yet.

I ran my old SC12 at 11psi for years where it got absolutely flogged, and would have been running as hot as hell. Now have an SC14 running 16psi though am yet to really drive it properly for extended periods.

And all in all, a replacement SC is only a couple of hundred dollars, so not the end of the world if it needs replacing.

Hen

[TERRA Operative]

interesting pic of the munted sc. for years there's been IMO wives tales about sc's melting the coating etc. from running them too hard, 1st time i've ever seen any sort of photographic evidence. so that was from over running? and not anything going through the charger?

Story from the owner in NZ is that it was at stock boost but sucking hot air from the engine bay through a pod filter.

Me and a mate measured intake temps of over 80 degrees with a bare pod on his N/A Mazda 323 with a Microtech, stands to reason the Teflon would melt after sucking air that hot and making it even hotter.

[feral4mr2]

IMO nz owner must of had bad pod placement of very constricted eng bay. depending on type of vehicle too i spose.

as i've said myself (and others i know) have ran sc12's at high boost with no ill effect. and i dont drive like miss daisy. maybe with the dodgy stuff i do in my cars i am just lucky.....

[Hen]

From memory I've seen over 80 degree inlet temps post-IC (admitedly just the stock 4AGZE job frontmounted) for extended periods. No SC damage resulted.

Hen

[RONA]

Given that teflon is used in cooking appliances & is subject to temps updwards of 200 degress celcius Wouldn't it be fairly safe to assume at temps half this amount that damage would not of been caused.

[feral4mr2]

those pics cannot be used for reference of over-driving a sc12 as the sc in pic wasnt overdriven. more likely very bad filter placement or other.

[mr2gze]

those pics cannot be used for reference of over-driving a sc12 as the sc in pic wasnt overdriven. more likely very bad filter placement or other.

Agreed. I'd like to get the full history and full story behind this engine.

It appears the car was recently purchased (Feb this year) and has not been reaching factory boost levels since (i.e. < 4psi).

I suspect there is a hell of a lot more factors regarding the melted lobe coating than simply poor pod placement itself. Without knowing the history of the engine it really is just speculation.

Vehicle is a 1988 ae92 Trueno, more details - http://www.twincam.info/index.php?showtopic=40484&hl=

[trdee]

newer thread here
http://www.twincam.info/index.php?showtopic=42238

[LO01UX]

So pretty much if I keep the sc12 well maintained ie change the oild every 5000 or so, put in a CAI, and dnt thrash it all day everyday it should be able to run 14psi quite fine?

[Hen]

So pretty much if I keep the sc12 ... and do thrash it all day everyday it should be able to run 14psi quite fine?

Yes, and amended to reflect my opinions.

Hen