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R34 Gcg Highflow

drgnball34

By drgnball34,
in Engines & Forced Induction

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drgnball34 Rising Star

drgnball34

Posted
Posted

Just sent my R34 GTT turbo off to GCG to get highflowed. Being doing abit of research and the max power is around 270rwkw from a R33 with cams. Mine also has cams ( tomei Poncams 260 ) and since the R34 has slightly larger exhaust housing... Is it safe to say that i should net 280rwkw with all the supporting fruit and a good tune? Now that would be pretty dam impressive from a highflow!

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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

A 10rwkw variance can be attributed to Dyno more than anything dude.

The figure will be between 250 & 270rwkw depending on the happieness of the dyno.

Thats around what most people get, so thats what you will get. I dont think you'll make more than anyone else when you have all the same gear :O

If you do only make 250rwkw, doesnt mean there is something wrong (i can see you posting a whats wrong" thread if thats what it makes)

Just remember its a dyno, tuning mainly is the use so results of a 15rwkw variance are not uncommon... so aslong as you get 250-270, she will go quite nicely i think :D

drgnball34 Rising Star

drgnball34

Posted
  • Author
Posted

Okies all dyno read diff..And many factors contribute to a final dyno reading i guess. But a highflowed R34 will produce more then a R33 highflow right? surley the bigger rear would make a difference to the reading after taking into account diff tune and dyno machines?

GTshortie Proficient

GTshortie

Posted
Posted

I believe the R33 your refering to making 270rwkw was with cams and the bigger vg30/r34 exhaust housing so effectively when you highflow yours it will be exactly the same size turbo.

as R31Nismoid was saying, the happiness of the dyno could already be the 10-15rwkw difference.

Sydneykid Grand Master

Sydneykid

Posted
Posted (edited)

Some of my experiences;

Example 1

R34GTT with R33GTST GCG Ball Bearing High flow and standard Neo cams = 253 rwkw.

R34GTT with R33GTST GCG Ball Bearing High flow and 260 Tomei Poncams = 265 rwkw.

Gain from changing cams = 12 rwkw (up to ~20 rwkw at some rpm points)

R34GTT with R34GTT GCG Ball Bearing High flow and 260 Tomei Poncams = 275 rwkw.

Gain from changing turbine cover and tuning = 10 rwkw

That’s my R34GTT on our race team dyno, which is most certainly not “happy”.

Example 2

R33TST with R33GTST GCG Ball Bearing High flow and 256 Tomei Poncams = 260 rwkw.

R33GTST with R33GTST GCG Ball Bearing High flow with VG30 turbine cover and 256 Tomei Poncams = 273 rwkw.

Gain from changing turbine cover and tuning = 13 rwkw

Ian’s R33GTST on another dyno, since results collate, most likely not “happy” either.

You can draw your own conclusions from the above.

:D cheers :D

Edited by Sydneykid
  • 2 weeks later...
RS500 Experienced

RS500

Posted
Posted
Some of my experiences;

Example 1

R34GTT with R33GTST GCG Ball Bearing High flow and standard Neo cams = 253 rwkw.

R34GTT with R33GTST GCG Ball Bearing High flow and 260 Tomei Poncams = 265 rwkw.

Gain from changing cams = 12 rwkw (up to ~20 rwkw at some rpm points)

R34GTT with R34GTT GCG Ball Bearing High flow and 260 Tomei Poncams = 275 rwkw.

Gain from changing turbine cover and tuning = 10 rwkw

That’s my R34GTT on our race team dyno, which is most certainly not “happy”.

Example 2

R33TST with R33GTST GCG Ball Bearing High flow and 256 Tomei Poncams = 260 rwkw.

R33GTST with R323GTST GCG Ball Bearing High flow and 256 Tomei Poncams = 273 rwkw.

Gain from changing turbine cover and tuning = 13 rwkw

Ian’s R33GTST on another dyno, since results collate, most likely not “happy” either.

You can draw your own conclusions from the above.

:D cheers ;)

SK,

in example 2, am i correct in reading that you made more power with a R32GTST GCG Ball Bearing hi-flow turbo?

please clarify.

Sydneykid Grand Master

Sydneykid

Posted
Posted
SK,

in example 2, am i correct in reading that you made more power with a R32GTST GCG Ball Bearing hi-flow turbo?

please clarify.

Sorry, trying to type too fast

I have fixed the original post, I think that answers your question.

At what boost level were those power levels reached SK?

1.3 and 1.4 bar respectively.

Dropped from 1.5 bar when we ported the cylinder head, less restrictions = more power at lower boost

:D cheers ;)

RS500 Experienced

RS500

Posted
Posted
Sorry, trying to type too fast

I have fixed the original post, I think that answers your question.

1.3 and 1.4 bar respectively.

Dropped from 1.5 bar when we ported the cylinder head, less restrictions = more power at lower boost

:D cheers ;)

hey SK,

thanks, that makes sense.

hey, actually, again in example 2, you state the same mods although with different power levels, that being from a different turbine cover. what turbine cover was that?

Example 2

R33TST with R33GTST GCG Ball Bearing High flow and 256 Tomei Poncams = 260 rwkw.

R33GTST with R33GTST GCG Ball Bearing High flow and 256 Tomei Poncams = 273 rwkw.

Gain from changing turbine cover and tuning = 13 rwkw

Cubes Grand Master

Cubes

Posted
Posted
they are all rated the same :rant:

i think the housing difference is very minor, just in the opening to the dump and stuff.

I think Bass Junky compared them... or was it someone else

Yer I did some measurements some time ago now, the R34/VG30 housing from memory was ~5mm wider.

I find it interesting how HKS tend to ran narrow skinny housings with a greater height where as the stock and garrett housings are flatter but wider.

Sydneykid Grand Master

Sydneykid

Posted
Posted
hey SK,

thanks, that makes sense.

hey, actually, again in example 2, you state the same mods although with different power levels, that being from a different turbine cover. what turbine cover was that?

Example 2

R33TST with R33GTST GCG Ball Bearing High flow and 256 Tomei Poncams = 260 rwkw.

R33GTST with R33GTST GCG Ball Bearing High flow and 256 Tomei Poncams = 273 rwkw.

Gain from changing turbine cover and tuning = 13 rwkw

I edited it again to clarify, I thought the "Gain from changing turbine cover and tuning = 13 rwkw" told the story but it now reads a bit easier.

:rant: cheers :O

PS, my problem is so many posts and such slow typing speed.

Sydneykid Grand Master

Sydneykid

Posted
Posted
Gary,

I'm curious...

The R34 and VG30 turbo's I had sitting here a while back were identical in general size not looking at comp wheel machining as the R34 comp wheel was considerably larger.

My understanding is that once the VG30 and R34GTT turbine covers are machined out for the GCG (high flow) turbine they are exactly the same.

:rant: cheers :O

Munna1 Proficient

Munna1

Posted
Posted
Some of my experiences;

Example 1

R34GTT with R33GTST GCG Ball Bearing High flow and standard Neo cams = 253 rwkw.

R34GTT with R33GTST GCG Ball Bearing High flow and 260 Tomei Poncams = 265 rwkw.

Gain from changing cams = 12 rwkw (up to ~20 rwkw at some rpm points)

R34GTT with R34GTT GCG Ball Bearing High flow and 260 Tomei Poncams = 275 rwkw.

Gain from changing turbine cover and tuning = 10 rwkw

That’s my R34GTT on our race team dyno, which is most certainly not “happy”.

Example 2

R33TST with R33GTST GCG Ball Bearing High flow and 256 Tomei Poncams = 260 rwkw.

R33GTST with R33GTST GCG Ball Bearing High flow with VG30 turbine cover and 256 Tomei Poncams = 273 rwkw.

Gain from changing turbine cover and tuning = 13 rwkw

Ian’s R33GTST on another dyno, since results collate, most likely not “happy” either.

You can draw your own conclusions from the above.

:rant: cheers :O

SK what was the lag difference between the stock high flow and the one with the larger exhaust housing?

staring boost rpm and full boost rpm

thanks

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