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Question For The Turbo Guru's ***pics Added***

Guilt-Toy

By Guilt-Toy,
in Engines & Forced Induction

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Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted (edited)

I got a new turbo put on, and used a 1.06 rear housing instead of a .82 rear and the car sounds allot deeper then before, the engine sounds the same and runs really good but the exaust note is tuffer and deeper...

oh its a GT3540 with 1.06 it used to be .82 ar and front is the same.

I was wondering if this is normal or should i look for a exaust leak or something ;)

Edited by Guilt-Toy
stolen_s15 Mentor

stolen_s15

Posted
Posted

I very much doubt its an exhaust leak mate, but obviously check the gaskets and what not.

Exhaust leak will generally sound alot louder, and not "tuff", "deep" or "throaty" but more rattly.

On a side note, how is the car to drive with such a large housing?

Cubes Grand Master

Cubes

Posted
Posted

The 1.06 on the 30det isn't too bad surprisingly.. It makes 1bar+ a little before 4000rpm.

The only real difference to the smaller .82 is the .82 begins making boost much earlier in the rpm; the larger 1.06 seems to make no boost no boost then within 400-500rpm it brings it all on but linear and smooth.

The 1.06 you loose that windmill feel at low rev's part throttle but by all means they still feel quite good on the 3ltr.

Guilt-Toy Grand Master

Guilt-Toy

Posted
  • Author
Posted (edited)
Not sure about you question but i have one for you!

What do you reckon of the bigger rear?

Yeah its good i wreckon, i can feel the car feels much more free off boost, and it seems to make 5psi by 3300rpm and full boost 1bar by about 3800. I have not upped the boost past 1 bar yet because i spent all my money on this turbo so there not even enough money to pay for extra fuel for road tuning either.

I very much doubt its an exhaust leak mate, but obviously check the gaskets and what not.

Exhaust leak will generally sound alot louder, and not "tuff", "deep" or "throaty" but more rattly.

On a side note, how is the car to drive with such a large housing?

Its good, I am thinking it has the same power at 9psi then it used to have at 15. So 20psi will be interesting, before i made 363rwkw on 25psi now it will be making that on 18psi i wreckon. Should be interesting

i would say that yes the larger housing would change the exhaust note, after all it is flowing a lot more freely, and is a larger chamber compared to before.

got lag at all tho?

Yes it raised the rpm for boost by about 300 - 400rpm

To the people inquiring about lag, he is running an RB30DET. From the dyno sheets i have seen they are normaly well on their way to making boost by 4000 rpm with the 1.06 rears.

mmmm yes. RB30DET.

Here are some pics from my mission last weekend, i took my time with it and used my old housings and gtr_etr sent me his 1.06 to swap with my .82 from QLD, thanks mate!... oh it took me about 4 hours all up to change it over by myself.

Have a look at the pics, i couldnt believe the difference between the two.

post-1240-1204149998_thumb.jpg

.82 left 1.06 Right

post-1240-1204150015_thumb.jpg

.82 left 1.06 Right

post-1240-1204150053_thumb.jpg

.82 left 1.06 Right

post-1240-1204150979_thumb.jpg

1.06 front .82 rear

post-1240-1204150076_thumb.jpg

Pic of changing it all over

post-1240-1204150283_thumb.jpg

Putting compressor cover on

Edited by Guilt-Toy
Guilt-Toy Grand Master

Guilt-Toy

Posted
  • Author
Posted

I know no one probly cares.. but i had some interesting fun with this new turbino on my car tonight

I gave it a quick street tune, just 3 hits in second gear only to fix the arf's up, got it down to 11.3 afr and far out.

I would have to say it has close to the same power before on only 18psi of boost.

This car is now going to be an animal, i was shocked after the third run and did not hit boost again, bit hairy going sideways and stuff.

cant wait to spend a few hours on the dyno with it. and on the map tracer you can see that the boost does come on 400rpm later, it goes to full load 19 at rev point 12 when before it used to be 11.

not bad! im going to like this new setup :)

FineLine Grand Master

FineLine

Posted
Posted

the larger housing is now on and yes it does alter the exhausrt note. Power comes on later tho that is to be expected on a 25.

The engine is on a mild tune at the moment making 335 killer wasps at 20 lb.

No timing or cam dial in yet. thats next weeks project I am hoping it may bring boost on a tad earlier as I dont think the power delivery would be much chop for track work. Any hoos, we'll see what happens with a few more pound of boost and some cam and timing work.

Guilt-Toy Grand Master

Guilt-Toy

Posted
  • Author
Posted

nah not yet, but i would like to once its tuned up

Sounds awesome.To you take the car to the strip much?
nice work guilt-toy

Sorry I missed your calls yesterday too - Left my phone in the car.

I still think you should put the WMI kit on and aim for 400rwkw :P

thats cool man, i will ring you in a sec

the larger housing is now on and yes it does alter the exhausrt note. Power comes on later tho that is to be expected on a 25.

The engine is on a mild tune at the moment making 335 killer wasps at 22 lb.

No timing or cam dial in yet. thats next weeks project I am hoping it may bring boost on a tad earlier as I dont think the power delivery would be much chop for track work. Any hoos, we'll see what happens with a few more pound of boost and some cam and timing work.

mine is a rb30det, so its not tooo bad.

these turbos are great for rb's !! my car sounds sooo much tuffer, especially in the mid range and just before it hits limiter, and when it hits limiter man it sounds like a animal! on low boost. i dunno if i will go much further then 22psi this time around

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