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molch

G6E Turbo replacement????

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Good effort mate. Looks like a good little turbo, would be interesting to see how the .7 cover goes in comparison.
Once boost control is sorted it looks to be a killer setup.

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I think you got exactly what you needed from 999 

 

most of these have been installed on low boost setups 

 

this may seem strange but with a low boost/power scenario that port job would be perfect as the exhaust flow isn't as great at lower levels. 

 

When you up the boost, you increase exhaust flow. Therefore you need a bigger port for this extra volume to go in that is unless you already have a large port to begin with.

 

it also becomes a feedback loop in your scenario as well, the port is to small to control boost so more boost goes in, more volume goes out the exhaust and through the turbine meaning you get even more boost. 

 

Needs more e85 and possibly even a larger port. What was the pre load like on the actuator?

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Mattyp. The tuner tried to 0 out the boost and it just wouldn't stop boosting like crazy. Trust me we were not chasing high boost at all.

 

The only way I could see this working on a low boost application is with a restrictive exhauast / intake so there are other parts of the entire system restricting boost. Unfortunately I must be the first person with a 4" exhuast and intake to fit one of these turbo's. I believe the exhaust housing is not fit for purpose with this turbo period. I took a gamble using an unknown turbo and housing and now I have the price to pay. The housing is not the same as ford spec housing so if anyone wants to buy Mamba housing I think they need to know this and take it into consideration. You would run the same risk even with a MAMBA GTX3582R if you have free flowing intake and exhaust.

 

Yep I agree a bigger port is needed and because no-one can guarantee a 40mm is big enough I will probably just go an external wastegate (45-50mm) to be safe. 

 

 

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Been doing a heap of research and everytime I think I know something I end up finding more information which tells me I know nothing and tried and tested is the best way unless you have heaps of money to try different combos and are ready for alot dyno time.

 

Some things I found interesting reads on turbine housing and its impact to power etc.

 

 

 

and

 

http://www.toymods.org.au/forums/threads/67759-Turbochargers-turbine-housing-AR-selection-how-to-work-out

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This is why paying a workshop for a full drive in drive out solution from products they recommend and know work is money well spent 

 

being a pioneer doesn't have as much glory attached to it as money spent typically ;) 

 

that being said you're probably not to far off having it sorted, just a few more coins to go  

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10 minutes ago, MattyP said:

Wait what size turbine housing is on there? 

It's so disappointing to see when sh*t doesn't work out

 

The exhaust turbine is 1.05 AR which, from what I now understand is one factor to compare against he ford 1.06 AR. However the design of the volute also has a huge effect so the numbers alone are not a good comparison.

Edited by molch

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Stick with it man, you will be rewarded, I lot can be said about guys who take a shot, learn a lot and come out the other end achieving greatness.

Again, I suggest you seriously look at a good quality 40mm external gate over more flapper mods.

We used to mess around with actuators and extra springs on ported internal gates in 2002, until we manned up and worked out internal gates are rarely the optimum solution on high performance applications.

Don't see internals on any formula one cars do ya!! :)

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Up the boost.
Big turbo & Small gate - high boost is one way to bandaid the issue.
Big turbo & big gate - low boost / high boost will have no dramas for boost control

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I am looking at buying a Mamba turbo as well I am considering the one you just got ( well maybe not now)  and their GTX3576R

 

here: http://www.ebay.com.au/itm/182261589403?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

is the spool / lag much more noticeable than the stock turbo with the one you have picked?  Do you think the GTX3576R from Mamba will get to 380RWKW on pump 98 as that is all I am after.

 

Edited by courtjesterau

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Silly question, but at $1300, does it work out that much cheaper than to rebuild ones factory core , and  machining the comp cover to take a billet wheel from one of the suppliers?

At least that way you keep the genuine core and rear wheel/housing. I wouldn't think the bigger 0.7 comp cover makes all that much difference on such small front wheels anyway.

 

I was quoted less than $800 for a GTX wheel transplant into a genuine perfect condition GT35r that's done sub 5000km on another car of mine (not falcon)

This was by ATS here in Adelaide and I think MTQ where similar.

 

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6 hours ago, Ale said:

Silly question, but at $1300, does it work out that much cheaper than to rebuild ones factory core , and  machining the comp cover to take a billet wheel from one of the suppliers?

At least that way you keep the genuine core and rear wheel/housing. I wouldn't think the bigger 0.7 comp cover makes all that much difference on such small front wheels anyway.

 

I was quoted less than $800 for a GTX wheel transplant into a genuine perfect condition GT35r that's done sub 5000km on another car of mine (not falcon)

This was by ATS here in Adelaide and I think MTQ where similar.

 

 

for a few hundred more I can get a brand new complete turbo and have the original one as a spare (or sell it) 

 

I was trying to decide between the 3584 and 3576 but after reading this thread im probably going to go the 76

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On 8/31/2016 at 1:16 PM, courtjesterau said:

I am looking at buying a Mamba turbo as well I am considering the one you just got ( well maybe not now)  and their GTX3576R

 

here: http://www.ebay.com.au/itm/182261589403?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

is the spool / lag much more noticeable than the stock turbo with the one you have picked?  Do you think the GTX3576R from Mamba will get to 380RWKW on pump 98 as that is all I am after.

 

 

I got some time to drop in and chat with Spiro today @ Autotech today. The guys a legend. He explained the issue with the Mamba exhuast housing that the wastegate hole comes with a 90 degree corner in it. Typical housings would have a nice flowed bend. We agreed we are going to pull it off and get it inspected for another opinion and see if further internal porting can fix the issue.

 

Would I buy a Mamba 3584R turbo again? Hard to say because I bought it as a drop in replacement to keep costs down etc and its not turning out that way so didn't really meet my initial requirements. Now I'm not saying to turbo compressor or core is bad (Jury is out) but my current learning is the exhaust housing is not ideal. 

 

For a drop in replacement the GTX3576r will be better I reckon (Budget for new intake pipes because its 4") . However the total power will depend on tuner, dyno, supporting mods and boost levels. This map shows it's doable but would need around 2.5 pressure (22PSI). To reliably get this high boost levels you also might have to port and exhaust housing so you could be in a similiar situation. 

 

virtuemart_product_gtx3576r_803714-1_com

 

 

 

 

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I cant see why it wont, it should be the same turbine being a gtx35. They sell a GTX3584 "supercore" and advertise it as being a direct bolt on upgrade to a gt35 turbo without modification so you would assume it would.


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7 hours ago, Ale said:

what am I missing in regards to using the original factory exhaust housing off your car?

 

Nothing is stopping me using it now. But t I have invested something in the mamba housing in regards to porting and bigger flapper and it's new (no cracks etc).

 

So I need to take it off the car, get it checked out and decide if I throw anymore money into the mamba exhaust housing or if I start again with the original ford housing and get the porting and flapper mod done to that. 

 

Hindsight is awesome ?

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your gonna spend more money on the mamba housing and still not know if its gonna work.

 

Cut your losses and mod your stock exhaust housing. Dudes be runnin 10s with the stock housing with port and flap mod. 

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