Gap Sauce

01/09/2024

Ever heard someone say "I worked at the refinery, it's all the same fuel"?

20/12/2023

New video is up at 5pm guys and girls! Enjoy.

https://youtu.be/sF5ZlAWf9fE

17/12/2023

This is why my 200kw xr8 ran 15.6@90mph stock, 4 of the 8 holes looked like this.. Always thought it was lacking a little. We got it down to a 14.3@97mph like this with tuning and intake porting.

New setup should go deep 13s, maybe 12s.
When you see it next onnthe channel we will have:

In house ported big valve GT40p's
Big nasty custom BrenPerformance Cam
Manta 1 3/4 4into 1 headers.
E85
Fuel system
4.11s
Stall
I have a few intakes to test too.

Stay keen!

16/12/2023

Making SOHC 4L's great again! Bone stock intech with our custom cam. +50rwkw on less boost with better spool. 😎

12/12/2023

Iron heads getting the goods for the AU XR8. Big valves for the GT40p's. Ported by BRENperformance (Me) and a nice Crow Cams Australia Pty Ltd Custom cam and spring package. She's going to be rowdy, just like the GT 😁

17/11/2023

4L SOHC head is back in my possession! After my porting we achieved in excess of 250cfm on the factory 1.85intake valve.
In other words we have gone from around 325hp to 390hp flow potential with potential for around 280cfm on the larger valves I've mentioned below.

The head has now been cut for 1.94s, final blending in progress. Then back together with the custom cams I have for testing (they are big) for some video testing for you all!

Pic is the new valves, which will be back cut 30deg. This will help low/mid lift numbers at the expense of high lift but more importantly will create a fuel atomisation ridge which promoting a more complete distribution and burn within the combustion chamber. This will allow me to run a more intense combustion chamber fill before I become limited by knock or ingas detonation.

Goal is to make some nasty power with the vortech at 7000rpm and make some waves on 98 before we run ethanol thru it.

07/06/2023

Throttle Body Mods ⬇️

Update** We have picked up nearly 3tenths of a second with this modification alone over 400m.

Rest assured we will find the flow limitations of this 65mm factory throttle body from my 200kw AU xr8. With the prices of 70mm factory units, you can see why cheap modifications like this can go a long way for the budget.

As you can see, I have removed one half of the shaft entirely and profiled the remaining half along with the screw threads in (yellow). This presents a huge increase in area relative to the size of the throttle bore. By flow area, this is over .5sq inches which is approximately 75cfm (cubic feet per minute). Using a basic formula of 1.5cfm/HP. This could more than 50hp potential airflow, the catch is that you need the airflow demand to reap the benefits.

Along with the shaft removal, I have blended the sharp edge (red) as well as the throttle blade. ***be careful to avoid removing material from the outer circumference of the blade especially on electronic throttle bodies, this will cause leakage and a high idle which will require retuning.

Gains were small in tested on the factory engine, but still over a tenth and 1mph. Once we have these heads and cam all hopped up and seeing 7000rpm. We will some real results from this modification.

Don't forget to use loctite, and bear in mind that I have gone further here than I would on a customer throttle body. It's a fine balance between safety and going fast.

If you haven't watched the video on this, jump on the Gap Sauce Youtube channel and have a look.

Who Dares Wins 😉

31/05/2023

A little something for the 4L SOHC build 😎

31/05/2023

▶️ If you like mods you can do at home, this one is for you! Get the tools out and go faster for free!

Don't forget to shoot me a like and drop a comment on the video, it helps the video alot, cheers!!

We take a 200kw AU xr8 5.0 ( 302w ) v8 ute that sat in a paddock and restore it to its former glory and performance. We then find the restrictions that we ca...

27/04/2023

1x Nasty Boss 290 coming up!

02/04/2023

GT update- Ported the heads, picked up 80hp of flow retaining the stock valve size. I achieved this with a very conservative port which will retain good midrange response and torque but allow this soon to be 5.5L to breathe above 7500rpm. "Flow test was done on unfinished ports" Once the rest of my parts arrive, you will see a video detailing how I got here 😎

#600+hp

02/04/2023

SOHC 4L porting has been completed, waiting on machining then you can expect

Headporting/intake video
Assembly
Cam selection and testing (4 custom grinds)

Then the race track 😁