Specialty-Z
1Sep/100

Z33 Vortech Tune….Ditch the Utec

Last year we had a Z33 with a Vortech SC come in for some baseline dyno runs to asses it running condition.  Our customer bought it already equipped with the blower and tuning.  We were amazed (OK, not so much anymore) how bad the tune was.  First of all the map the car was running of the piggyback Utec wasn't even the right one.  We put it on the "right" map and did another pull.  Results shown below.

So the blue run was the way the customer had been driving the Z around.  After locating the Utec we set it on the "right" map and made another pull shown in green.  Needless to say it was horribly off on either setting.  We started by ditching the piggyback Utec in favor of our beloved Uprev.  This Z had larger injectors and fuel pump which I had to figure out exactly what he had since the owner had no clue.  He bought the car from a sand lot used car dealer with all mods installed.

Here's the before and after.  Red was on the Utec "tuned" map and blue is what we ended up with after we tuned it using Uprev.  Safer and more power.  290 whp before & 323 whp after.

26Aug/100

Kevin’s Z34

Mr. Kevin Chen drove up from S.D. to get his Z tuned.  Kevin has the full F.I. exhaust system including resonated test pipes and Stillen G3 Intake.

Baselined @ 308 whp and came out ahead to 318 whp after tuning.

22Aug/106

SZ goes to Canada

Back in July we headed off to Vancouver, B.C. to meet up with our good friends.  We had been there before to do some tuning but this time we sure weren't expecting what followed!  We took for the airport 7 a.m. Friday morning and arrived to Vancouver around 2 p.m.  I could not believe how "nasty" Canadian customs is.  I was interrogated by the first officer with a very bitter cold attitude (like your job?).  What are you doing in Canada?  How long will you be staying?  Where will you be staying?  How do you know the people your staying with in Canada?  Where do they live?  Just some of the questions I was asked.  Shortly after we pick up our bags and head to the EXIT, boy was I wrong.  I got picked out by another officer and was told to follow them into another back room.  Great, I had some tuning equipment in my bags not to mention we brought our AFR wideband stand that looked like a pipe bomb to an untrained eye.  Again I was attacked with 20 questions in under 20 seconds.  I thought a cavity search was next.  Lucky for me I didn't have to open up my bags and I was allowed to enter the Canadian country.  BTW, vorpalz (Rob K.) has a very nice writeup with more pictures of our adventure, be sure to read and view it by clicking on this.

Beautiful view from the plane.

We were picked up by Rick H. and his lovely wife.  Grabbed a quick bite to eat and made it over to Meatman's (Josh) home\workshop.  We knew Josh had been working frantically that entire week to get his car back on the road after eating a rod bearing (or so he only thought at the time).  Arriving to Josh's property I was amazed of his "little" place.  Beautiful and a lift for his Z!

The Workshop

Josh's Zed

Scurfie's Silver Zed and McGuiness' peeping in front of it.

Tom's beautiful Z

Little did we know that this VG was going to be out in a couple hours.  Greg and I listened to Josh's engine and it didn't sound pretty.  Not only was there some nasty lower end noise it cranked over with low compression.  We put our heads together and decided to fix it with parts Josh had laying around.  Thus began our mad adventure.

Josh anxiously pulling his Zed into the workshop.

Josh had a good assortment of tools although there were plenty of times we wished we had something better to accomplish some tasks.  I learned a new name for "zip ties" as we commonly know them here.  In Canada they are also known as "zap straps".  How freakin' cool is that?

Pretty SZ 3" SS Exhaust.

Rob confirming that his test drive after one of our fixes was successful.  Greg riding shotgun.

We all worked like mad men.  Determined to get Josh back up and running AND tuned the next day.  Greg and I were running on little sleep as it was.  We started around 6:30 that Friday afternoon and finished around 7:30 a.m. Saturday morning.  Luckily for Josh we were on a mission and he had a good looking (internally) short-block sitting around.  We transferd all of his parts including his old heads on to that thing.

So not only did it have low compression.  It had bad rod bearings and main bearings!  Way to go Josh!  He knows how to punish a VG on the road course.

Rick's wife stuck around with the boys all night long!

Here you can see Josh (Nike shirt) looking for something.  What was I looking for again?  ;) McGuinness looking on.  There were plenty of times we faced big bumps compromising the end job.  With enough determination we saw it through.  By the time 2-3 a.m. hit I was beat.  I slept a few hours in Josh's Zed.

My bed for a few hours.  I remember waking up while the car was up in the air and recalling the boys stabbing the trans into place.  WTF was that? (thinking to myself) Oh, yeah.

Around 6:30 a.m.  Buttoning everything up.  Boy it was a sweet thing to hear that engine crank over.  It sounded so healthy and quiet.  Everything had come to plan.  I don't think anyone could believe it.

Greg making sure she's pretty to see the light of day.  It's all in the details.

Rick's Zed

Josh looking and probably thinking to himself, how the hell?  Damn this rocks!  Greg and I went to our hotel room to take showers, ate breakfast, and went over to the dyno for another long day of tuning!

Did I tell you we were a little tired?

Some of the dyno results:

Josh's fresh rebuild made a nice amount of power.  Sport 530 powered.

Scurfield's Zed proved to have some gremlins that needed to be addressed before it could undergo more power.  Sport 700 powered.

Rob's (vorpalz) Zed powered by Sport 530s on 91 Octane.

Tom's Zed powered by 2871Rs on Q16.  Well done.

We finished up tuning 9 p.m. Saturday night.  We went to the hotel, ate dinner, fell asleep by 10:30 and woke up by 5 a.m. the next day to catch our flight back to L.A.  We love Zs, Zeds, can't you tell?  Don't forget your zap straps!

This is a rare find.  JDM RHD Slick Top TT from the factory.  Canadians do have it good.

21Aug/100

Jim & Cliff

TT.Netters may recognize the red car as being Jim Nichols Z32.  That would be Dave N.'s dad.  Jim, Dave, Cliff, and Ben all came down to get Jim and Cliff's Z32s tuned.  Jim has a very clean Z with standard bolt ons and still has factory CAT pipes.  His basic engine mods are:

  • Stock Turbos
  • SZ Downpipes
  • OE CAT Pipes
  • 740cc Injectors
  • JWT Single POP
  • SZ Catback
  • Boost Jets
  • Stillen SZ Modded Intercoolers

Nothing crazy but makes for a nice solid Z car.

Cliff on the other hand has a 96 2by2 that he himself converted to a TT.  Cliff has our full SZ 2.5" exhaust setup, Z1 Stage 1 turbos, Nismo 615cc injectors, larger intercoolers, etc..

Cliff's car came in with a terribly lean AFR, this was corrected however along the way we suspected his VTCs were not working.  His low end power was lacking.  After some tests we concluded the valves behind the cams were MIA.  Cliff went back home, tore it down and fixed the problem to come back and get it finalized.  Here's a graph showing the difference with VTC.

Blue was without VTC and red is with VTC.  Big difference!  Thank Nissan for implementing VTC for the VG30DEs.  One of the many advantages over the RB26.

5Aug/100

Clutch Disc Weights

A few months ago we weighed our own clutch discs and a competitor's product.  This was all done to compare the weight difference in our High 5 Puck Disc.  We covered its release here:  http://specialtyz.com/blog/?p=45

In short the more weight the input shaft has to deal with the harder it is for it to go into the next gear.  The inertia from a heavier disc will cause more wear and tear on synchros especially for those quick shifters out there.

Here's how the discs performed on the scales.

We'll start things off with our modified street disc.  Coming in at 3.8 lbs.  Perfect for the driver who wants very silky smooth engagements and won't be tearing it up at the drag strip.

Our 6-Puck comes in just a tad lighter than the street disc.  This disc is for those who are mean to the drive-train assaulting it with clutch dumps and high horsepower.

Next up is the competitor's feramic disc.  This puppy comes in at a heavy weight of 4.6 lbs.  Feramic materials were developed for agricultural use (tractors, heavy equipment, etc.)  It is heavy duty and also heavy on weight.  Not really designed for the sports car enthusiast.  Notorious for welding themselves to your flywheel as well.

This brings us to our new 5 Puck disc.  Extremely lightweight and nimble.  Easy on your trans and gives the driver the much needed high RPM shifting desired without sacrificing transmission internals.  A must for the spirited driver looking for no compromises.  Our pressure plate that goes with this disc is also lighter.  Amazingly provides NO harsh engagement and NO chatter.

27Jul/100

Avo’s G37

Last month Avo brought in his G37 AT Coupe for tuning.  His G has the Stillen Gen 3 CAI, and Fast Intentions exhaust system.

There was some definite "leanness" commonly found with some intake systems.

The "before" and "after" graph.  Red is before and blue is after.

21Jul/100

Buzzing along……….

Sorry for the lack of updates to those who keep up with my posts.  It's been busy over here and dealing with personal matters leave hardly any time for our blog.  I am way behind and have lots of stuff to share from the last month or two.

To keep it funky fresh we dynoed Javier's Z32 TT a couple months ago.  It was a pleasure to meet him and his family.  Javier is a Floridian who made the move over to non-humid SoCal.  I am not a fan of that Florida weather, sorry dad.

Javier has a very clean Z32, his mod list escapes my memory.  I'm pretty sure he has 2560R turbos.  Javier if your reading this e-mail me your mod list. UPDATE, his mod list is as follows:

Engine Internal Modifications

Block bored .020 over

Oversize Wiseco forged pistons

Rotating assembly balanced

Coolant galley casting flash removed

block is deburred

Port matched upper plenum

Port matched lower plenum

Mild Street ported heads

Engine External Modifications

Twin Garrett GT2560R Turbos

Greddy Intercoolers

HKS SSQV Twin Blow Off Valves

Labree Split Down Pipes

Z1 2.5" Test Pipes and HKS Hyper Cat Back

Z1 Dual POP Charger Intake

Dual MAF Sensors

Z1 Polished Hard Pipes

PCV ‘s Relocated

Unorthodox under drive pulley

Custom  aluminum radiator

Custom dual oil coolers

Nismo 740cc injectors

Engine Management

SZ Tuned ECU

Apexi AFC Neo

Greddy profec B spec II boost controller

Greddy turbo timer

Tuned for 91 octane (blue) and 100 octane (red)

12Jul/102

The Straman

My long time friend had his Straman upgraded with larger turbos (2560Rs) a few months ago and after installing the Selin Dual POP kit we went to work on tuning his beast.

Some may not know but Straman was a company in SoCal that took cars not offered in covertible versions from the OEMs and made them convertibles.  1990 seems to be the only year Straman rendered their services on the Z32 TT.   Hydraulic actuated top and some very good bracing make this a Z32 TT feel better than the OEM Verts.

Jason's Straman comes equipped with:

  • 2560R Turbos
  • SZ\300 Degree 740 Fuel Kit
  • Stock Block & Heads
  • MSP Manifolds
  • SZ 3" Downpipes
  • SZ 3" to 2.5" Test Pipes
  • SZ 2.5" Single Oval Tip Catback
  • 2.5" I\C Piping
  • Ash Massives
  • Z1 58mm Throttle Bodies
  • Selin Dual POP Kit

Peak boost hits by 4400 RPM (17 psi) and tapers down to 16-15 psi the rest of the way.  444whp and matching torque.

Stay tuned for 100 & Q results!

5Jul/100

Black Z34 Beauty

Making a run down the 1320.

Rudy brought in his Z34 for some tweaking on our Dyno.  Mods include SSR wheels, K&N Typhoon Intake System, HKS Hi-Power Catback, Kinetix HFCs, and Stillen Engine Oil Cooler.

His K&N intake didn't pose any lean running condition associated with some intakes.

A nice average of 9 to 10 whp across the board after the tune.

29Jun/100

Demolishing the Stock Z32 Turbo Record

The results in the following post are unbelievable and truly shows the potential of the Z32-TT with stock turbos.  This also goes to show that factory intercooler piping is restrictive at the stock turbo level and that high quality MS Manifolds help them push harder.  There hasn't been anyone to date to do this on stock MT turbos so here goes!

Adam did not skimp out on anything when it came to building this Z.  You buy high quality parts you get high quality results.

The following is the list of mods done to this wonder:

*Completely stock/un-modified Bottom End
*Completely stock/un-modified 40P Heads
*Completely stock/un-modified 5 speed cams
*Completely stock/un-modified 5 speed turbos
*Specialty Z Custom Dyno Tune 91, 100 & 116
*Specialty-Z SS 4-Bolt 3" Expansion Down Pipes w/ wastegate Separators
*Specialty-Z SS 3" Test Pipes
*Specialty-Z: SS 3" Single Oval Cat-Back Exhaust
*Specialty-Z 6QT Oil Pan
*Specialty-Z Multi Map 16 Program Switcher
*Specialty-Z 1 Piece Clutch Line w/ New Slave Cylinder
*MSP Manifolds
*Selin Translator
*Custom "Intercooler" Piping 2.5"
*Custom "Suction Pipes" w/ Jim Wolf Dual 350Z Filters 2.5"
*Custom "Accordion" Pipes 2.5"
*Stock "Turbo Inlet" Pipes
*AshSpec Massive SMIC
*Z1 58mm Throttle Bodies
*Mild Port & Polish Upper Intake Plenum
*Specialty-Z "High Five" Puck Clutch (The lightest clutch made for the Z32)
*RPS Segmented Flywheel
*Z1 Platinum Aluminum 1 piece drive shaft (Might get replaced with a CF DS in the future)
*Blitz SBC ID Boost Controller
*300 Degree Fuel Rails w/Nismo 740cc Injectors
*CZP Fuel Rail Lines (OEM route)
*BDE Engine Mounts
*BDE Intake Cam Gears (un-adjusted)
*Tomei Exhaust Cam Gears (adjusted)
*Unorthodox Racing Crank Pulley
*YB HI Over Drive Water Pump Pulley
*Nissan R34 Skyline Wheels, 18"x9" +30 Offset (19#ea)
*265/35/18 Falken Azenis RT-615 Tires

91 octane, 14 psi for 419 whp!

100 octane, 20 psi for 463 whp.

Q16, 21 psi peak for 499 whp!!!!!!!!  For those of you with larger turbos using stock I\C piping, manifolds, small exhaust, etc.. your choking your VG30!

This is the comparison to the previous record.  What a difference!!  Smooth power throughout the powerband.

Congratulations to Adam!  Remember to keep your turbos boosted people!