Sprayitracing

Sprayitracing SiR Fuel Systems and R35 GT-R Performance

Congratulations Jordan Campbell for Winning the GT-R World Cup Street Class.  With a new Personal Best ET/MPH of 9.33 @ ...
02/04/2019

Congratulations Jordan Campbell for Winning the GT-R World Cup Street Class. With a new Personal Best ET/MPH of 9.33 @ 145mph. This is the Quickest/Fastest pass I have ever seen out of a 100% un-touched GR6 Transmission. SiR Tuned with EcuTek Technologies Ltd software in the ECU and TCM.

And a little in-person tuning with a nice FBO GT-R
05/27/2016

And a little in-person tuning with a nice FBO GT-R

A Nissan R35 GTR with basic exhaust upgrades producing 588hp.
Ecu calibrated by Bill Guthrie of Sprayitracing.

Little remote tune today with a set of GT3071 at 22 AND 24PSI
05/27/2016

Little remote tune today with a set of GT3071 at 22 AND 24PSI

Aftermarket GT-R rods with OEM Tapered small end...  These rods are not for big HP, but they will fit any piston, includ...
04/11/2016

Aftermarket GT-R rods with OEM Tapered small end... These rods are not for big HP, but they will fit any piston, including OEM!

Recent Remote tuning session..  Not too shabby for 30psi
02/06/2016

Recent Remote tuning session.. Not too shabby for 30psi

Here is a very interesting comparison.  Here is 1 Alpha 12 (Green line) with OEM heads small cams and high boost (Bigger...
02/06/2016

Here is a very interesting comparison. Here is 1 Alpha 12 (Green line) with OEM heads small cams and high boost (Bigger torque to as you can see).. VS an Alpha 12 (Red Line) with Big Heads, Bigger cams and low boost. Both cars feature 3.8L engines, Alpha Race Coolers, 4" Exhausts, Alpha induction kits, BL intakes, E85 etc.. The dyno shows the response difference, but driving them back to back the difference was even more pronounced.. Just figured I would share some interesting info!

Recent tune at AG.  Ronnie Crawford long block. Fabshop built Alpha 12.  Lower boost for now :) SiR EcuTek Tuned!
01/30/2016

Recent tune at AG. Ronnie Crawford long block. Fabshop built Alpha 12. Lower boost for now :) SiR EcuTek Tuned!

The best for last among the trio of Nissan GTRs being tuned by Bill Guthrie of Sprayitracing.
This is one of the cleanest and professionally assembled examples of a GTR. The Fabshop Miami built R35 GTR producing 1169hp/792ftlbs and securing it's spot on the Top 10 dyno list.

We have been doing these walbro fuel pump kits for for the past few months.   I They work great, its hard to beat the co...
01/25/2016

We have been doing these walbro fuel pump kits for for the past few months. I They work great, its hard to beat the combination of reliability, voltage efficiency, and flow. While it does require minor modification to fit, the end result is very clean and nice. We are seeing more and more drop in fuel pump systems needing direct fuel pump wiring. Especially in newer 2012+ cars. The Walbros are especially great on OEM fuel pump wiring. They are among the most voltage efficient high flow pumps on the market. That also means lower fuel temps.

Avalibile as a kit for $249
https://goo.gl/3uyZ9P

12/01/2015

Most don't know, we can get almost any OEM Nissan Part direct from Japan. Some items are less expensive here due to shipping. But we can usually save a lot on small/light items.

Here are a few examples that we try to keep on the shelf

https://goo.gl/juv3PD

Little SiR ported intake manifold and fuel system upgrade in progress..
09/27/2015

Little SiR ported intake manifold and fuel system upgrade in progress..

Aric, doing some work out in TX!
06/29/2015

Aric, doing some work out in TX!

Our shootout winner Aric in the silver GTR

Camshaft testing...  Same car, same dyno, same timing/fuel/boost, each with optimized cam timing maps...
06/08/2015

Camshaft testing... Same car, same dyno, same timing/fuel/boost, each with optimized cam timing maps...

Another Fore Innovations system going in!  Lots of Horsepower this week.
06/08/2015

Another Fore Innovations system going in! Lots of Horsepower this week.

1 down, 2 to go... This week!
06/02/2015

1 down, 2 to go... This week!

SiR 2000cc now with Data Match Technology by Fuel Injector Clinic
05/13/2015

SiR 2000cc now with Data Match Technology by Fuel Injector Clinic

Some coated pistions almost ready for duty
04/28/2015

Some coated pistions almost ready for duty

USM turbos in-stock :)
04/27/2015

USM turbos in-stock :)

SiR flex fuel kit + AMS fuel drain for a flex fuel conversion.  Time for the good stuff!
04/26/2015

SiR flex fuel kit + AMS fuel drain for a flex fuel conversion. Time for the good stuff!

SiR stage 4 turbos.  Did very well this weekend. Super happy for the 1st time out.
01/26/2015

SiR stage 4 turbos. Did very well this weekend. Super happy for the 1st time out.

Little preview of something new
01/15/2015

Little preview of something new

2014 GTR engine ready for a visit to Ronnie Crawford Racing Engines.
01/06/2015

2014 GTR engine ready for a visit to Ronnie Crawford Racing Engines.

Whoops, had to call Dynojet..  1st Stage 4 turbos looking pretty insane. Pegged the dyno at 1200whp..
12/17/2014

Whoops, had to call Dynojet.. 1st Stage 4 turbos looking pretty insane. Pegged the dyno at 1200whp..

Prototype SiR Stage 4.  Dyno and 1/4 mile soon...
12/12/2014

Prototype SiR Stage 4. Dyno and 1/4 mile soon...

SteveZ's #Ecutek #Flexfuel powered #SiR Built and Tuned 8 Second GT-R..
10/26/2014

SteveZ's #Ecutek #Flexfuel powered #SiR Built and Tuned 8 Second GT-R..

Alpha 12 AMS 3.8L E70 fuel, #ecutek #racerom
10/25/2014

Alpha 12 AMS 3.8L E70 fuel, #ecutek #racerom

FL2k bound!
10/10/2014

FL2k bound!

Ready to set some records ;)
09/30/2014

Ready to set some records ;)

Dual 4" Titanium midpipe.  Sound is unreal!
07/26/2014

Dual 4" Titanium midpipe. Sound is unreal!

Todays project, SiR Stage 2 turbos, Greddy FV BOV, Gotboost SD intakes, EcuTek FlexFuel.
07/25/2014

Todays project, SiR Stage 2 turbos, Greddy FV BOV, Gotboost SD intakes, EcuTek FlexFuel.

USM Turbos looking good :)
07/24/2014

USM Turbos looking good :)

Finally testing Gotboost Fuel pressure kits!
07/23/2014

Finally testing Gotboost Fuel pressure kits!

Jacktrans 3.8l BL1300 @ 31psi flexfuel #EcuTek tuned.
07/22/2014

Jacktrans 3.8l BL1300 @ 31psi flexfuel #EcuTek tuned.

Recent dyno tune..  This one has a lot more to go.
07/22/2014

Recent dyno tune.. This one has a lot more to go.

Address

Miami, FL
33186

Telephone

3053493278

Products

Fuel Injectors, Fuel Systems and High Performance Parts for the R35 GTR

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