Jump to content
SAU Community

Looking 420-450rwhp From The R33

3intheBack

By 3intheBack,
in Engines & Forced Induction

 Share

Recommended Posts

Packy Collaborator

Packy

Posted
Posted

Hmmm doing my own HUGE turbo conversion myself at the moment.

GT35/40R, custom high mount manifold, plazmaman inlet plenum, wolf 3d v4+, tomei fuel pump, 550cc injectors, and all the other usual's. All i'm hoping for is 250rwkw, though it seems you guys/gals are getting more out of stock engines than i thought you'd wanna push. Has anyone got any dyno's in shootout mode??

Also as i've got the head off atm, would you guys/gals recommend standard head gasket, or 1.2mm or what??

HypeR33 Mentor

HypeR33

Posted
Posted
Hmmm doing my own HUGE turbo conversion myself at the moment.

GT35/40R, custom high mount manifold, plazmaman inlet plenum, wolf 3d v4+, tomei fuel pump, 550cc injectors, and all the other usual's. All i'm hoping for is 250rwkw, though it seems you guys/gals are getting more out of stock engines than i thought you'd wanna push. Has anyone got any dyno's in shootout mode??

Also as i've got the head off atm, would you guys/gals recommend standard head gasket, or 1.2mm or what??

Why not have a look at the link below to the turbo upgrades thread:

RB25 turbo upgrades

Find a member's car with around the power output you are looking for and see what turbo they are using...then check the dyno graph to see if the power delivery will be acceptable for you. There are pages of info on setups that are already in use by members.

I have the 3540 and it is too big if you want 250kw.

BezerkR32 Veteran

BezerkR32

Posted
Posted

Cams will fatten up mid range depending on what you run, 256 with 8.5mm lift are most common on Rb25 and work well. but you didnt mention anything about replacing valve springs, highly recomended to do this before installing camshafts, as standard springs are at their limit at about 22psi at 7000rpm. When you oder cams order RB20 inlet cam so you can fit adjustable cam gear.

Hey guys,

Here my current setup that dyno'd at 403whp on an RB25DET w/ garrett GT30R, avc-r is turned off and using a 1 bar spring on the external tial gate.

Internally stock, but i am in the process of buying tomei cams, and 1.2 headgasket.

My dyno is pretty close to phee's.

You guys think the cams would aid in boosting earlier?

RB25DET Motor Swapped from an 1994 R33

MINES Tuned 300ZX Z32 TTurbo ECU

Aeromotive Fuel Pressure Regulator

Aeromotive Liquid Filled Fuel Pressure Gauge

Greddy Hi Polished Intake Manifold

Greddy External Oil Catch Can

HKS SSQV BOV

HKS Type S Front Mount Intercooler

Garett GT30R Ball Bearing Turbo Hi Polished

Thermal Wrapped Turbo Blanket

Tial Wastegate 38mm

- Externally Dumped

Custom Top Mount Stainless Steel Exhaust Manifold

Kinetic Motorsports 550CC Injectors

Keeplabs Custom Billet Top Feed Fuel Rail

Keeplabs Custom 90mm Q45 Throttle Body

Keeplabs Custom One Piece Driveshaft

Keeplabs Custom Intercooler Piping

Keeplabs Custom 3” Downpipe (Heat Wrapped – 1 02 bung, 1 extra bung for Wideband)

Keeplabs Full AN Fittings, Stainless Braided Fuel System

3" Stainless Steel Catback Exhaust

- 3 Inch Straight Through From Turbo

Z32 AFM

Walbro 255 Fuel Pump

49889675.dynosheet.jpg

604cefiro Contributor

604cefiro

Posted
Posted (edited)

Hey BezerkR32!

Which tomei cam is best for my current setup listed? Lash type 256 with 8.5 lift?

I don't plan to boost higher than 1.25bar, and i'm probably going to keep the stock redline, until i can afford to dump more money

My block is stock at the moment.

My current plan was to buy and install the following:

Tomei camshafts, cam gears, 1.2 headgasket, timing belt, and your new recommendation for valve springs.

I'm also trying to figure out the part numbers on Tomei website.

If I'm going with the PROCAM + Adjust pulley (Alminium IN,EX) package, wouldn't the package be specific to the RB25DET? Being that the cam gears will fit on the camshafts? Do I specifically have to tell them that I want an RB20 inlet cam? **just a lil confused**

Lastly, for the Valve Springs, should I go with the 8.8mm lift?

EDIT: I forgot to mention my engine harness / ecu setup. My car is an 89 HCR32 GST-T. The engine is an 1994 RB25DET using the stock rb20 engine harness. vvt is not hooked up. injectors are top fed. The ECU is from a Z32, Mines Tuned. Using piggy back SAFC2 to control af.

Is vvt THAT important? What kind of performance am i losing here??

Thanks for the help!!!

Cams will fatten up mid range depending on what you run, 256 with 8.5mm lift are most common on Rb25 and work well. but you didnt mention anything about replacing valve springs, highly recomended to do this before installing camshafts, as standard springs are at their limit at about 22psi at 7000rpm. When you oder cams order RB20 inlet cam so you can fit adjustable cam gear.
Edited by 604cefiro
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

i still dont get the graph, the more i look at it the more odd it seems.

On one side its either been deliberately tuned to be laggy, ie no ignition to get it going...

Yet, on the other side its making a reasonable amount more top end power than anyone else has before @ 1 bar with the 550/600hp Garretts...

Hmm.. Cefiro, do you have a dyno sheet with the AFR's on it?

Also first thing i would be doing is getting a better ECU.

If your on a budget and you have to choose between cams and ECU, ECU is the pick there

604cefiro Contributor

604cefiro

Posted
Posted

I'll try to dig and see if i can find the sheet with the AFR's.

I remember it not being a graph, but a print out sheet with AFR's at certain rpms and boost.

The problem right now is my wierd engine harness setup.

I'm using my stock RB20DET engine harness connected to the RB25DET. Since the pins on RB25 ecus are different than RB20 harness, i opted for a Z32 turbo ecu that plugged right in.

Besides the fact that i'm missing VVT, the car runs awesome and AFR numbers are good. Although, lowend power is teh sucks.

What ECU / standalone management can I run to control the RB25 on my RB20 harness?

Will I have to go and source an RB25 engine harness?

If you were wondering why im not running an rb25 harness in the first place, it was because the place i bought the motor from did not have the harness with the motor (scored the motor for a crzy price).

i still dont get the graph, the more i look at it the more odd it seems.

On one side its either been deliberately tuned to be laggy, ie no ignition to get it going...

Yet, on the other side its making a reasonable amount more top end power than anyone else has before @ 1 bar with the 550/600hp Garretts...

Hmm.. Cefiro, do you have a dyno sheet with the AFR's on it?

Also first thing i would be doing is getting a better ECU.

If your on a budget and you have to choose between cams and ECU, ECU is the pick there

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      R33 persistent issues. P/steering and lag/misfire

      By GTSBoy · Posted

      Power steering is probably because someone has nuked the HICAS CU and you no longer have the variable power asist doing what it is supposed to. How much boost are you running? You are aware that any more than 10 psi on the stock ECU is just asking for it to go to full R&R (that's Rich & Retard, which is effectively Retarded and Retarded!) which kills all the power. Depending on the exact conditions, it can just be runnign on the fat and stupid end of the maps, then the conditions change, you make a little more boost and the ECU goes into panic.
    • Kapr
      Freddy Plenum vs Genuine options RB25

      By Kapr · Posted

      @BuiltNotBought Just as GTSboy said.   If you want driveabilty and more low down torque..keep the stock runners. They are VERY good from a factory. I have them too on my RB25DET NEO and as a GTSboy i have fmic but with stock piping route(i have Blitz intercooler) Iam making around 320 BHP and the car pulls "hard" from like 2,5k all the way to 7k. I have it dyno tuned to mimic N/A power curve and making little less max torque due to the smallbox tranny. But driveability is very great. I had 350Nm below 3k so car feels very quick.   EDIT:  Not my channel but i saw this and i know that is what i want (and i have exactly this)  
    • MissMintyR33
      R33 persistent issues. P/steering and lag/misfire

      By MissMintyR33 · Posted

      Looking to sort out a couple of issues on my skyline  It recently was rebuilt, however rebuilder long story short did not give two flying effs about the work he did. So moving forward it's running but I have two persistent issues 1) it has a misfire / lag type of issue (was at higher RPMs but I had a dead piggy back ecu removed which improved it) now it's not as bad but still does it at random, I thought it may have been a boost issue I'm running an older turbosmart dual stage controller, turbosmart told me to try running off gate pressure however it still has a lag at random times. It has New MAF, maf plug, coil packs, sparks, CP harness.. injectors tested and cleaned. Factory ECU. 2) Power steering issue. It is tight as anything. Flushed power steering, rebuilt my pump because the bearing was shot. Flushed again still tight (mainly when parking and going slow into my driveway etc)  No kinks in hard lines, replaced the lines I could see had cracks. Still tough to steer.  I was told to shim a coin and place into the solenoid plug? Is there anything else. My steering angle sensor also has a issue. It's a used one I replaced, does it need to be calibrated? I feel like I've tried everything and this car is my voodoo doll.   
    • Dose Pipe Sutututu
      Neil's R33 Gts-t Build

      By Dose Pipe Sutututu · Posted

      Holy shit... wow!!! I totally missed this
    • MBS206
      Dose's Sometimes DIY and Pay Someone Home & Boat Improvement Thread

      By MBS206 · Posted

      One main filter. Each tank has a prefilter to keep rocks and small children out, then the big main filter that also does water separation. Clogged the first one so bad it was like a rev limiter at 3200rpm. Literally just like dropping the throttle off and maintaining rpm!
×
×
  • Create New...