Whats required to fit a GT42R to a RX7 motor

[BlitzBoy]

yep that will reduce the CR nikp, but you will hurt low speed cruise and accelaration if you do. A turbo rotary CR is low enough, you just need WI to run big boost safely on a big ass turbo

[nikp]

yep that will reduce the CR nikp, but you will hurt low speed cruise and accelaration if you do. A turbo rotary CR is low enough, you just need WI to run big boost safely on a big ass turbo

I was actually saying that\'s how the CR is lowered in the first place - it would have to have a factory lowered CR to be able to run, otherwise the engine would blow itself apart - and that\'s what the tubs are for.

However, i have i think, been talking a load of cr@p recently - comes from being bored at work with lack of stuff to do. So maybe all my posts should come with a health warning!! :p

[Rixio]

Ok now thats all just whizzed over my noggin @ 600mph...:Hammer

[BlitzBoy]

lol thats ok Nik I knew what you were getting at,
the conclusion is for someone to run this Bad ass turbo he is selling you dont need to lower the CR any further on a 13Brew.
I would recommend a ported motor though to spool up that bad boy with WI

[chip-3door]

Its actually a relatively quick spooler anyway, due to the lightweight components that the BB core allows, so less inertia.

Should be no laggier than a conventional dirty old T4 really.

[Rixio]

On the subject of turbos...iv just bought the xspower one from kev but he said

"Turbo was pulling smoke through exhaust on overrun, there is no excess play in shaft so may have poor drainage back to the sump"

WTF does that mean???

[BlitzBoy]

Means too much oil pressure is entering into the Centre Cartridge, you can put a restricter into the oil feed to regulate how much oil is supplied into the turbo

[chip-3door]

Based on the XSpower turbo\'s ive seen it means that its a cheap crap copy made in china

Loads of crap from them sold through ebay etc



Assuming it is just drainage though, he means that the path from the turbo to the sump has too much resistance in it (bad pipe layout or whatever) and as a consequence excessive amounts of oil are building up in the turbo and causing it to get past the seals and in the compressor housing.

[Fish]

What size exhaust housing is on it?

Fish

[chip-3door]

.91 A/R hotside mate.

[Rixio]

Based on the XSpower turbo\'s ive seen it means that its a cheap crap copy made in china

Loads of crap from them sold through ebay etc



Assuming it is just drainage though, he means that the path from the turbo to the sump has too much resistance in it (bad pipe layout or whatever) and as a consequence excessive amounts of oil are building up in the turbo and causing it to get past the seals and in the compressor housing.

So does that mean it needs a rebuild?

[K1HKS arse]

I had a gt42r on my ported motor before it sh*t itself and smashed the turbo to bits.Engine and turbo had only done 2500miles!!!!!!!!!!!!

It spooled up very well actually making a bar at around 4500-5000rpm.If i hadnt just bought a new turbo to replace it i would of had this for sure.Havent got the dosh now though,was looking for one of these about a month ago.

Well worth the money,you want big power then this is the kidda.Excessive motorsport in the states made over 600rwhp @ 30psi with one of these.

[chip-3door]

So does that mean it needs a rebuild?

Depends on what is actually wrong with it.

If its a manufacturing fault then it potentially needs sending back under warranty, if its just too much oil pressure and it hasnt actually damaged the seals you might get away without having to do anything to it if you give it a decent oil return when you use it.

Impossible to say

[Rixio]

So what would be the best course of action... dont want it to blow and sh!t bits into my engine...

[chip-3door]

Take it to someone to be stripped and inspected.

Potentially quite expensive though, as really needs to be balanced when it all goes back together.