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NISMO Plenum for GTR

Roy

By Roy,
in Engines & Forced Induction

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Ants Grand Master

Ants

Posted
Posted

Need to gather some more interest.

If I get one, I promise SAU I would do a proper back to back!!!!!!

I would have been interest a few weeks ago - I have since already received mine :wacko:

Thanks for posting the results Andy.

Kind of makes things a bit clearer, although the results will vary on the type on engine configuration used.

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RH9
RH9

Guys sorry to reply so late, I see there have been a few comments re this plenum. As far as my boost goes, the issue only occurred after going from the previous turbo's to the 2530 Kai's and installi

OYEAHA
OYEAHA

Ah unlucky was worth a try ! Only thing I can hide from the mrs is credit/PayPal account lol

  • 3 weeks later...
  • 3 weeks later...
RH9 Rookie

RH9

Posted
Posted

Guys sorry to reply so late, I see there have been a few comments re this plenum.

As far as my boost goes, the issue only occurred after going from the previous turbo's to the 2530 Kai's and installing the step 2 camshafts.

From what my tuner tells me the Kai's seem to hit the surge zone at 1.7 bar as another customer also runs them (also 2.6 but with Type B V-Cam) and he also has this compressor surge.

Neither of us has a problem on our "older" 2530's but the Kai's make pretty amazing HP for 98 octane but its a pity there is something holding them back beyond 1.7 bar. It would seem they could make 500kws @ wheels if we could get a surge free 1.9 bar. With E85 they would prob get close to that HP now. Amazing little turbo's.

Im going to try a balance pipe between each intake pipe to equalise spool and possibly between the 2 exhaust manifolds if I can get around to it.

The plenum gave me a definite gain in the width of my powerband. My tuner said he didnt alter ignition timing and he kept the AF the same as before. Its purely from the Nismo plenum.

The slight drop in torque and slight increase in lag may just be from the atmospheric pressure difference as we tuned on a very hot summers day. I will dyno again in winter and see if this is the case. I'd like to help as much as I can because this is an expensive item and I want to know more about what its done.

Will keep you posted.

Cheers

Andy

RH9 Rookie

RH9

Posted
Posted (edited)

Guys sorry to reply so late, I see there have been a few comments re this plenum.

As far as my boost goes, the issue only occurred after going from the previous turbo's to the 2530 Kai's and installing the step 2 camshafts.

From what my tuner tells me the Kai's seem to hit the surge zone at 1.7 bar as another customer also runs them (also 2.6 but with Type B V-Cam) and he also has this compressor surge.

Neither of us has a problem on our "older" 2530's but the Kai's make pretty amazing HP for 98 octane but its a pity there is something holding them back beyond 1.7 bar. It would seem they could make 500kws wheels if we could get a surge free 1.9 bar. With E85 they would prob get close to that HP now. Amazing little turbo's.

Im going to try a balance pipe between each intake pipe to equalise spool and possibly between the 2 exhaust manifolds if I can get around to it.

The plenum gave me a definite gain in the width of my powerband. My tuner said he didnt alter ignition timing and he kept the AF the same as before. Its purely from the Nismo plenum.

The slight drop in torque and slight increase in lag may just be from the atmospheric pressure difference as we tuned on a very hot summers day. I will dyno again in winter and see if this is the case. I'd like to help as much as I can because this is an expensive item and I want to know more about what its done.

Will keep you posted.

Cheers

Andy

Edited by RH9
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Sinista32 Grand Master

Sinista32

Posted
Posted

Hi Andy - I recently had the Nismo plenum installed in my R32 GTR. It's running -7's with forged internals and Haltech Pro ECU.

I initially had an issue in the lower RPM range (0-3000rpm). It felt restricted like there was insufficient pressure, so I had to keep the RPM's up or it would almost stall from a normal moving off or reversing.

It was a little like a Ram Jet. Seemed I had to be moving to ram the air in/increase pressure.

Glen at ESP managed to tune the issue out for me, and it is more responsive than previously (ever).

Result of installing this plenum: More kw's with less boost and earlier response.

Maybe worth touching base and having a quick chat.

Cheers

Richard

RH9 Rookie

RH9

Posted
Posted

Hi Andy - I recently had the Nismo plenum installed in my R32 GTR. It's running -7's with forged internals and Haltech Pro ECU.

I initially had an issue in the lower RPM range (0-3000rpm). It felt restricted like there was insufficient pressure, so I had to keep the RPM's up or it would almost stall from a normal moving off or reversing.

It was a little like a Ram Jet. Seemed I had to be moving to ram the air in/increase pressure.

Glen at ESP managed to tune the issue out for me, and it is more responsive than previously (ever).

Result of installing this plenum: More kw's with less boost and earlier response.

Maybe worth touching base and having a quick chat.

Cheers

Richard

Hey Richard,

Thats really interesting about how you have achieved a different result. To be honest I think my "loss" of response was due to the ambient temp on the day we dyno'd as the dyno cant compensate for this - its just a fact of life. We all feel more response and torque when the air is nice and cold :)

Ive made another recent change to the car, running the Kakimoto front pipe "premium" which deletes the cat with much longer primaries off each turbo. Will be interesting to see what that does. Have backed it up with a Tomei Ti exhaust so it should sound great.

Maybe some E85 and 500kws from the lil low mounts ;)

All good fun. Keep the results of the plenums coming in. I will post a dyno sheet so you can see the difference I had.

Cheers

Andy

wedge_r34gtr Mentor

wedge_r34gtr

Posted
Posted

Sorry to dig up an old thread but i have a chance to purchase one of these for a great price any one know how to identify the reals from the fakes and distinguishing features

If that falls through, i can still add you to the group buy if you can get money to me ASAP.

wedge_r34gtr Mentor

wedge_r34gtr

Posted
Posted

Ah unlucky was worth a try ! Only thing I can hide from the mrs is credit/PayPal account lol

I could put you onto the supplier and you could ask nicely if he accepts credit car- he is an SAU member.

I've just transfered him the money for the Groub Buy Plenums.

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