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Sr20 Advice for more response - Hardtuned.net

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Sr20 Advice for more response 

sr20det
7 replies to this topic

#1 unkn0wn

  • Joined:10-August 04
  • Location:Australia WA
  • Car:180Sx

Posted 24 May 2016 - 01:50 PM

HI Guys,

I have an internally standard sr 20, with some Tomei Spring and Tomei 270 Cams.

I had this turbo from another project that i put on and ran, but to be honest its a big laggy for me.
Turbo is a Garret 3082 / 64 rear housing.
JK 0111J / 700177-5014

Here is my dyno from friday's Tune
(gates 15psi - and its just got a ball valve to hold boost, hence its a bit flakey)

Posted Image


Im thinking im not running enough boost to make this thing efficient anyway.

Im very curious how much less lag a 3071/64 would have as i can just keep my housing from the existing setup and not change much.
does this lag seem normal for this size turbo on a sr? is it more the cams?
/discuss

keen to hear your thoughts.

#2 180X

  • Joined:03-February 08
  • Location:Australia QLD
  • Car:180 type X, s15

Posted 24 May 2016 - 02:00 PM

is that turbo external gated? only because u said .64 rear?

#3 unkn0wn

  • Joined:10-August 04
  • Location:Australia WA
  • Car:180Sx

Posted 24 May 2016 - 02:07 PM

View Post180X, on 24 May 2016 - 02:00 PM, said:

is that turbo external gated? only because u said .64 rear?

t3 / 64 / 4 bolt - exhaust housing.
45mm turbosmart external gate installed.

#4 180X

  • Joined:03-February 08
  • Location:Australia QLD
  • Car:180 type X, s15

Posted 24 May 2016 - 02:10 PM

View Postunkn0wn, on 24 May 2016 - 02:07 PM, said:

View Post180X, on 24 May 2016 - 02:00 PM, said:

is that turbo external gated? only because u said .64 rear?

t3 / 64 / 4 bolt - exhaust housing.
45mm turbosmart external gate installed.

for one 270 cams is wayy to big, drop it down to 264 or even poncams.
3082 is pretty outdated turbo, i would look at the gtx3071r in .63 rear if you have the coin.

If you want more response i would go split pulse t3 manifold + gtx 30 series.

#5 Dose Pipe Sutututu

  • Joined:19-January 05
  • Location:Australia NSW
  • Car:Boat Sutututuutu

Posted 24 May 2016 - 02:50 PM

cams too big
turbo too big
single scroll

I would stick to 260 cams, good lift
GTX3071 in twin scroll, and a proper twin scroll manifold with 2x gates OR merged back into 1x 45 ~ 50mm gate

will make more power, more torque more fun to drive and more everything.

#6 blingcommander

  • Joined:05-October 06
  • Location:Japan
  • Car:Scooty-Puff Jr.

Posted 24 May 2016 - 03:42 PM

Nitrous

#7 1.5J 180

  • Joined:01-March 15
  • Location:Australia QLD
  • Car:180SX

Posted 24 May 2016 - 07:39 PM

Well, since you're thinking of a 3071, here's a comparison for you of my old S15. Hopefully this helps a bit..

Engine: SR20DET (Non VCT), Garrett GT3071.63 T3 single scroll... same tuner, same dyno, same boost (thereabouts as you can see)...pump 98 fuel

Green is before with 268/272 kelford cams... red is after with Tomei 260/260 procams. Only change made was cams.

So yeah, others on the money with more modern and suitable sized turbo and cam recommendations for balance of response and power

Attached Files

  • Attached File  S15.pdf   318.93K   127 downloads

Edited by 1.5J 180, 24 May 2016 - 07:51 PM.


#8 liambrm

  • Joined:07-March 07
  • Location:Australia VIC
  • Car:1993 180sx

Posted 24 May 2016 - 07:55 PM

cams to big turbo too big.





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