Tuesday, December 13, 2011

S13 Update: Engine Upgrades

My Silvia S13 Coupe rebuild project is coming along quite nicely. In fact, after the engine respray, the car has slowly been upgraded with better external parts (note the pictures above and below).

The first to arrive was a brand new Garrett GT2871R turbo, good for 460hp. The reason why I picked this particular unit instead of a larger one like the GT30, was because the GT2871R represents Garrett’s largest turbo available in the T28 series frame size. Based on the popular “Disco Potato”, the GT2871R includes a 71mm compressor wheel coupled with the NS111 quick-spool turbine wheel. The magic of the GT series turbochargers resides in the turbine and rotating assembly, which rides on dual ball-bearings. 

The end result is a pretty responsive turbocharger, which can also flow large amounts of airflow resulting in decent midrange and top-end power. Ideal for track and gymkhana work. Do note however that I will eventually get a GT3071R but only after I get a hang of the S13 on the track.

Which leads me to the next upgrade - a set of four Power Enterprise 800cc Top Feed Injectors. In light of my intention to upgrade to a GT3071R in the near future, I have opted for these large cc injectors as a future proof measure. And why Power Enterprise (PE)? Well it's partly because I've used their injectors in past with my R33 GT-R rebuild and from what I've heard, Sard DENSO makes them.

Next up, we have a fresh-out-of-the-oven TurboSmart Comp-Gate40 external wastegate. It's Turbosmart's new 40mm external wastegate (measuring only 99 mm in height) is designed to fit into tight engine bays with it's new smaller actuator housing.

The Comp-Gate40 has all of the good features you would expect from a quality wastegate: cast stainless body, anodized hat and base, stainless heat shield to protect the diaphragm, a ultra high lift diaphragm, cast stainless body clamps, stainless weld flanges etc. TurboSmart is heavily involved with rotary engines in Australia and turbo rotaries can produce exhaust gas temperatures approaching 1900 degrees F. Now how's that for product testing? Anyway, here are some other features that are worth knowing about.

Locking Ring
The Comp-Gate40 does not use allen screws around the perimeter of the spring hat. It uses a trick "locking ring”. The benefits of the locking ring are no more stripped allen screws, no more stripped hat bases, much easier spring changes, spring changes in less than a minute and an overall reduced height wastegate which allows greater flexibility of wastegate placement.

Reduced Package Size with no Sacrifice in Gas Flow
The Comp-Gate40 is only 99mm (3.89”) tall, but still has .582” of valve lift. It also only measures 74mm (2.91") at its largest diameter making the Comp-Gate40 probably the smallest wastegate on the market.

Unique Rotating Cap
The spring hat can be indexed in 12 different positions allowing for greater installation flexibility. The rotation can also be done in less than a minute by only loosening the locking ring. This really does make things go quicker during the setup of a new custom installation.

All in all, the Comp-Gate40 should work perfectly right out of the box. Be sure to apply some light grease on the locking ring threads if you're installing one.

I think I might be using a couple of Comp-Gate40 wastegates on my other ride, the R33 GT-R, maybe with a Full-Race twin scroll exhaust manifold and a BorgWarner EFR turbo but that's all in the future...

Last but not least, the final piece to the rebuild puzzle is a spankin' new Haltech Platinum Sport 1000/2000.

Personally, I think the Haltech Platinum Sport 1000 is packed with more features than any ECU in it's class. It's capable of controlling sequential injection on 2 and 4 cylinder with semi sequential 6 and 8 cylinder applications. With 8 channels capable of controlling injection and ignition duties, the Haltech unit is able to support most modern engines with multi-coil ignition systems, as well as conventional distributor ignition systems.

Here are some of the Platinum Sport 1000's features:
  • Soft cut rev limiter
  • Closed loop boost control
  • Stepper motor and BAC/IAC closed loop idle control
  • User-definable mapping points
  • Anti-lag launch control with rotational idle
  • Wideband closed loop 02 Control
  • 8 additional user-definable inputs
  • 4 additional user-definable outputs
  • Tuning via TPS with Manifold Correction
  • Numerous Correction Maps
  • Onboard Data logging
  • Windows Software
Well, thats all for now. The engine and car are actually ready and have been subjected to mandatory on-the-road tuning, but that will be covered in a future entry. Cheers.


Chevy HHR cold air intake said...

Quite a technical set of parts you chose there. Good luck with your work and please do so update. I am excited to see what will become of your S13.

gunner93 said...

Hi Loki, Great Passion there. I am also a keen time-attacker with my S-Chassis. Would be keen to hook up to exchange info. We are at Facebook "Pitworks". Check us out. Hope to meet with you possibly at one of the yam cha session. Best Regards, Colin 012-2928812

alex said...

Thanks for sharing this image. I bet the engine would perform better.

Diesel Tuning

alep said...

hey, sorry for interrupting,i think i saw your car at a workshop in hicom subang. forgot the name of the workshop,it was 2 years ago.
just wondering, your gt2871r using .64 or .84? hehe