8000 RPM LT4, inside a Katech powered ZL1 - Page 6

Blackmonba6Gen · 02-27-2023, 05:41 PM

Subbed! This is definitely going to be quite a build. I can’t wait to see the finished results! Keep up the good work

Katech_Zach · 03-23-2023, 02:44 PM

Good Afternoon Guys,

It has been awhile since I have posted. Haven't done too much this winter with how much is going on at Katech. We have some really cool projects/products in the works that I have been focused on.

I went and fixed all of the pictures on the thread, I believe they are all functional now. I don't think I ever posted any dyno graphs yet, so here is where the car currently sits:

The car makes 800rwhp at 8000 RPM. It's running on pump gas without any issues. I did a test with a slightly smaller pulley, I made 850rwhp around 7700 RPM before the blower efficiency and fuel started to get angry. In a future post, I will go into more detail on the blower efficiency / combination topic to help out anyone with specific power targets on their build.

Long story short, I discovered where the unported 2650 supercharger is happiest (peak rotor speed) before heat and other areas become a factor. If I wanted to make some real power at 8000 RPM, I would have to unrestrict this supercharger, add cooling capacity, and change fuel to something with more detonation resistance (such as E85, race gas, methanol, etc)

Looking forward to the nice weather season this year!

PowerDemon · 03-23-2023, 03:24 PM

Nice numbers!! Torque curve looks amazing. Got any sound clips of this thing at 8000rpm?!

AZIROC · 03-23-2023, 03:34 PM

That's awesome!!

Katech_Zach · 03-23-2023, 03:38 PM

Quote:

Originally Posted by PowerDemon

Nice numbers!! Torque curve looks amazing. Got any sound clips of this thing at 8000rpm?!

I do not have any good sound clips yet, I plan on upping the content quality / volume this season though!

Some bonus content that I did not post yet:

Apex VS-5RS group of 6. 4x in OEM sizes 19x11 + 19x12, 2x in 18x12 for a drag set

Chevy Performance Aluminum Cap, fits perfect with the wheels

MBRP R1017 Resonators welded in my tunnel, seam welded in the middle

AEM 50-1005 Aux Pump, using BMRS race grade line, Radium Fuel Filter, DSX T-Fitting

BMRS Fuel Line Routing

AN-12 Fuel Feed Bulkhead

We have a real cool low side solution for these cars coming out very soon. Stay tuned for that.

khcoaching · 03-23-2023, 04:18 PM

Awesome updates!

Checkmate1 · 03-24-2023, 07:55 AM

Thank you for the updates Zach. I keep wondering about the inherent benefits of a lighter flywheel on and off track.

As someone who is a fan of the 911 GT3 - I've always admired the precision and the ability to slice the throttle in so many increments. I know the 992 GT3 now has Individual Throttle Bodies and a LTW flywheel that elevates the experience.

I just wish someone had a video of a ZL1 that shows the before and after with and without the LTW flywheel.

I am almost there on buying in...just need to see it :-)

02-27-2023, 05:41 PM	#71
Blackmonba6Gen BLUPRINT_1LE Drives: 2022 Rapid Blue SS 1LE Join Date: May 2017 Location: Motor City -> AZ Posts: 726	Subbed! This is definitely going to be quite a build. I can’t wait to see the finished results! Keep up the good work __________________ 2022 Camaro SS 1LE \| PDR \| Rapid Blue \| Manual \| Katech Built SS 1LE \| Katech Build Sheet IG: BLUPRINT_1LE YT: BLUPRINT_1LE ----------------------------------------------------------------

03-23-2023, 03:24 PM	#73
PowerDemon Drives: Camaro ZL1, Golf GTI Join Date: Feb 2022 Location: Richmond, VA Posts: 170	Nice numbers!! Torque curve looks amazing. Got any sound clips of this thing at 8000rpm?! __________________ ’22 ZL1 Riverside Blue 6MT ’15 GTI Carbon Steel 6MT

03-23-2023, 04:18 PM	#76
khcoaching Drives: 2021 1SS 1LE Join Date: Nov 2020 Location: 98548 Posts: 611	Awesome updates! __________________ Follow my build - https://www.camaro6.com/forums/showthread.php?t=594295

03-24-2023, 07:55 AM	#77
Checkmate1 Drives: Garnet Red / ZL1 1LE Join Date: Apr 2016 Location: Bel Air, MD Posts: 492	Thank you for the updates Zach. I keep wondering about the inherent benefits of a lighter flywheel on and off track. As someone who is a fan of the 911 GT3 - I've always admired the precision and the ability to slice the throttle in so many increments. I know the 992 GT3 now has Individual Throttle Bodies and a LTW flywheel that elevates the experience. I just wish someone had a video of a ZL1 that shows the before and after with and without the LTW flywheel. I am almost there on buying in...just need to see it :-) __________________ #SAVETHEMANUALS

03-23-2023, 02:44 PM	#72
Katech_Zach Drives: 14 Camaro SS 1LE Join Date: Feb 2019 Location: Clinton Twp, MI Posts: 483	Good Afternoon Guys, It has been awhile since I have posted. Haven't done too much this winter with how much is going on at Katech. We have some really cool projects/products in the works that I have been focused on. I went and fixed all of the pictures on the thread, I believe they are all functional now. I don't think I ever posted any dyno graphs yet, so here is where the car currently sits: The car makes 800rwhp at 8000 RPM. It's running on pump gas without any issues. I did a test with a slightly smaller pulley, I made 850rwhp around 7700 RPM before the blower efficiency and fuel started to get angry. In a future post, I will go into more detail on the blower efficiency / combination topic to help out anyone with specific power targets on their build. Long story short, I discovered where the unported 2650 supercharger is happiest (peak rotor speed) before heat and other areas become a factor. If I wanted to make some real power at 8000 RPM, I would have to unrestrict this supercharger, add cooling capacity, and change fuel to something with more detonation resistance (such as E85, race gas, methanol, etc) Looking forward to the nice weather season this year!

03-23-2023, 03:34 PM	#74
AZIROC Drives: '86 IROC-Z '18 ZL1 Join Date: Jul 2019 Location: Arizona Posts: 734	That's awesome!!

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