Archives for : General

SR20DET Fun

Juan from Bardabe brought over his customer’s car for us to tune.  This time we got to play with a red top SR with a 2876R Garrett turbo.  This 240SX comes with an S15 front end conversion and is gutted for drifting fitted with a cage to boot.

Here are some other important mods:

  • Z32 MAF
  • Sard 850cc Injectors
  • HKS 272 Cams
  • Brain Crower Springs & Retainers
  • Cosworth Headgasket
  • 87mm Bore & 9:1 Compression (CP Pistons & Eagle Rods)
  • HKS W\G Actuator 10 psi Base
  • Blitz Intercooler
  • Unknown Exhaust Manifold
  • Greddy Intake Manifold
  • Greddy Recirc Valve
  • Blitz SBC iD Spec-R B.C.

We used the factory ECU with a Nistune board to get this little 4 to run properly.  After many hours of getting the base map & cold\hot start setup we were ready to make power and turn the rollers.  We setup the HKS W\G actuator to 10 psi base and later installed a Blitz SBC-iD Spec-R Boost Controller to make more ………BOOST!

91 Octane Tune, 15 psi for 353 whp & 292 Torque

Q16 Tune, 23 psi 444 whp & 355 Torque.  You’ll notice that at 6600 RPMs the clutch (Exedy) starts to slip thus the power drops and boost drops.  It can still make more power!


Melissa Drifts & Godspeed Turbos

We’ve known Miss Melissa for a few years now and she’s been a die hard drifter ever since she had the opportunity to try it herself.  There’s a good chance you’ll see her if you frequent the drift circuits like Irwindale in SoCal.  Her poor car has seen alot of abuse but it just keeps going.  She sent me a text one day out of the blue if we would install a pair of turbos on her car.  I kept an open mind and knew something like this undertaking was opening a can of worms.  Its not as simple as one may think, throw some turbos on and your done.  Doesn’t really work that way most of the time.  Melissa’s Z32 is pretty stockish in the performance department.  It packs a JWT Single POP, Boost Jets, JWT ECU, Stock Fuel Injectors, Genie Catback, SZ Clutch & Flywheel.  That’s it for mods.  So when she asked about upgrading turbos we scratched our heads.  There was plenty more to do before she truly maxed the stock turbos potential.  For those who missed it, this is the pride and joy (click me).

Godspeed hooked her up with a pair of their new turbos and intercoolers.  Our opportunity to see what cheap Chinese made turbos look & perform.  Chinese parts\copies have taken over our market by storm.  Its amazing that the consumer will buy the cheapest option, thinking only with their pocketbooks.  Anyways that’s enough of ranting, I can go on and on and on and on and on……..

To simplify things and minimize the can of worms we opted to install the turbos with the engine in the chassis.

Specs direct from Godspeed:

Compressor Trim 60 Exhaust Trim 63
Intake side inducer 46.48
Intake side exducer 60
Exhaust side inducer 53
Exhaust side exducer 47.12
Internal wastegate set at : 12 psi

We found that the wastegates were totally off.  One opened at 5 psi the other at 9 psi.  We set them for 13-ish psi.  Keeping in mind Melissa has no boost controller.

Dual port actuator is included.

It’s “hot” side.  4-Bolt housing.  Much larger housing than stock though.  Turbine wheel is a good size.

The “cold” side.  You’ll notice that the inlets and outlets are cast made to fit the Z32 configuration.

Turbo Manufacturer (JiaMu).  A quick Google search brings up some diesel truckers experiences with them.  Let’s hope they last for Melissa’s sake.

Stock cold side on the left, Godspeed on the right.

Stock hot side on the left, Godspeed on the right.

Melissa’s Z32, checkout her site when you have the opportunity @ www.melissadrifts.com

The results:

This isn’t a straight apples to apples comparison as you can see the boost levels were different along with supporting mods.  11 psi on the stock turbos, 13-14 psi on the Godspeed.  The Godspeed turbos also received a help from their intercoolers along with some down pipes & test pipes.  So I wouldn’t go off this graph.  This is just to show the difference on how the car ended up.  287 whp on stock turbos, stock pre-cats & cat pipes, and stock intercoolers.  341 whp on Godspeed turbos, intercoolers, down pipes, test pipes, and higher boost.  Just so we’re clear on differences.  No tuning was performed and the factory injectors are still performing fueling duties.  This power level is easily attainable on stock turbos as most already know.

We wish you the best in luck with your drifting quest Melissa, and let us know how the turbos hold up.  At least now she’ll be able to smoke the tires more effortlessly through the drift.  Rock on.

Christian’s Project Z34

Christian came to us for tuning on his Z a few weeks back.  He has a black powdercoated Stillen G3 Intake, Berk HFCs, and Tanabe Y-Pipe connected to the factory muffler.

Great clean look with the intake piping powdercoated black.

Final Results

J.C.C.S. 2010!

On September 12th we attended the 6th Annual Japanese Classic Car Show in Long Beach (Queen Mary).  It was a beautiful day for a car show and the cars were outstanding.  It was great to see the old classics flexing their stuff.  In no particular order I present to you some of the highlights.  John Morton made an appearance along with signing some autographs.  Be sure to click on the image for a full shot view.

Not in the show but an interesting find.  MR-2 with Z32 wheels.

26,000 Original Miles

Blow-Through Carb Setup on a rotary

Mr. Morton

Z33 Vortech Tune….Ditched the UTEC

Last year we had a Z33 with a Vortech SC come in for some baseline dyno runs to asses it’s 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 off 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.

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.

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.

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 little harsh engagement and little chatter.

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.

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)