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R32GTR/Iceland

Precision Billet Turbos

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I noticed the new 7275 and 6875 doesn’t have a T4 divided rear option

only Vband rear and T4 open

 

can anyone see any issue with running a twin scroll T4 divided manifold with twin gates into an open T4 rear ?

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13 hours ago, SiR_RB said:

can anyone see any issue with running a twin scroll T4 divided manifold with twin gates into an open T4 rear ?

No, I really can't see an issue with it.   The merge may not be perfect but there are definitely worse ways of doing it - it could arguably work nicer than some 6>1 manifolds out there.

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21 hours ago, Lithium said:

Ha! That is ridiculous, nice work!  That's gotta be one of the more stout RB25 setups out there, being SAU people will probably make dyno comments but realistically - an RB25 with 270deg cams and 40psi pumped through it on E85 is going to make some serious power :)

What is the spool like?  There is no rpm scale on the dyno plot (NFI why people print plots like that), so a bit hard to tell.   Be very interesting to see how it goes at the strip, hope you have a decent trans! :D

 

spools insanely quick. that ramp up is within 1000 RPM. It takes off like a rocket. I roll race so I needed the snappy response.

 

On 7/31/2019 at 1:30 AM, Dale FZ1 said:

What turbine housing size - also single/split pulse + gate setup?

Perhaps drop something into the RB25 dyno results page

Strong result.

single pulse, 44mm wastegate , T4  - 81 AR

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11 hours ago, feedmyfast said:

spools insanely quick. that ramp up is within 1000 RPM. It takes off like a rocket. I roll race so I needed the snappy response.

 

single pulse, 44mm wastegate , T4  - 81 AR

Would love to compare it to my rb25 6062 setup in terms of response.  

QLD or Syd roll racing?

 

Also curious on what headstuds youre using? 

Edited by r33ryan

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Anyone got any results from the newish 7275 or 6875 turbos yet?

 

or do I have to be a first and report how it goes lol

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I've just found out that the "7675" I thought I had was actually a 7175 rated to 985hp. Explains why it was so responsive and why my IATs were so high on high boost 😂 

The 7275 Gen 2 should be a pretty stout turbo considering its rated at 1200hp and biggest housing offered is a .96 which should mean it will possibly spool a bit quicker than my 1.12 7175?

Mine started to max out low 30s so im not sure how well matched the compressor is to the turbine but the newer wheel might make it better.

I've now upgraded to a 7685 so we'll see how that goes. Will report back once shes up and running again.

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3 minutes ago, klutched said:

I've just found out that the "7675" I thought I had was actually a 7175 rated to 985hp. Explains why it was so responsive and why my IATs were so high on high boost 😂 

The 7275 Gen 2 should be a pretty stout turbo considering its rated at 1200hp and biggest housing offered is a .96 which should mean it will possibly spool a bit quicker than my 1.12 7175?

Mine started to max out low 30s so im not sure how well matched the compressor is to the turbine but the newer wheel might make it better.

I've now upgraded to a 7685 so we'll see how that goes. Will report back once shes up and running again.

What did you make with the "7675" again?

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8 hours ago, Lithium said:

What did you make with the "7675" again?

1021hp 1374nm 35psi 

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10 minutes ago, klutched said:

1021hp 1374nm 35psi 

What engine was that on ?

 

 

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14 hours ago, SiR_RB said:

Anyone got any results from the newish 7275 or 6875 turbos yet?

 

or do I have to be a first and report how it goes lol

I get the feeling you’re going to be the guinea pig  

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21 hours ago, SiR_RB said:

Anyone got any results from the newish 7275 or 6875 turbos yet?

 

or do I have to be a first and report how it goes lol

Hi what engine is it going  on

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23 hours ago, klutched said:

1021hp 1374nm 35psi 

That's pretty impressive, all things considered!  The actual 7685 will make things rather interesting :)

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If anyone is selling their precision let me know please

after something from 6875 to 7675 in size 

T4 rear

 

thanks 

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