[NG329]

https://youtu.be/dYqYSe0uIr0

[NG329]

https://youtu.be/LBFIKbMyY6g

[NG329]

827whp @ 6500rpm | 12.5lbs Boost | Pump 93

Magnuson 2650 with 100mm upper pulley
LT4 Long Block
Terminator 2 Rough Idle Camshaft
VVT Delete Cover, 3 Bolt Gear and Bolts
TSP Gen 5 LT4 Valley Cover
LT Timing Chain Gen 3 (3/8 x 7/32 x6)*
3/8 Pushrods
GM Camshaft Lifter Kit/Guides/Crank Seal
ARP Crank Bolt
ARP Flywheel Bolts
BTR Bronze Bushing Trunion Kit
LT4 660 Spring Kit using TSP Seat Seal.* Install height 1.810”
Katech LT Oil Pump
Katech 174* Thermostat
ATI Superdamper
ATI 8 Rib Crank Pulley 9.17-17%
8 Rib serpentine Belt 86-1/8
SAE VR1 Racing Motor Oil
American Racing Headers ceramic coated 2” Headers No Catalytic converters, Long System
Iridium LTR7IX-11 Spark Plugs
JMS Voltage Booster
Monster Triple Disc Clutch rated at 1,150HP
JLT Cold Air Intake with 5" Tube
Nick Williams 103mm Throttle Body
Apex SM-10 18" wheels. 18x11 front; 18x12 rear
Pirelli DH Slicks: 310/660/18 front; 325/660/18 rear
ARP hardened wheel studs
Griffin Motorsports Heat Extractor Bracket
*Remove Passenger seat to save approximately 65lbs
Ferodo DS3.12 brake pads, front and rear
*steel braided brake lines
Castrol SRF Brake Fluid
Camber: -3.0 front; -2.0 rear
Johnson Tie Bar Lifter kit
*Coming Soon* MCS Double Adjustable Suspension with the GTR spring rates (800lbs front; 1100lbs rear)

[arpad_m]

So much power on so little boost, a beautifully elegant and very strong build

I see Ted and the crew have managed to up their game even further... made me think about going back for a 2650 and some exhaust mods Not that I need more power, but I love all the upgrades they developed, they do compound really well.

[2SS Capt]

Very nice... Part of me wants to give my car to one of these VERY reputable shops and say "Here's $20,000... Make this bitch sing!!!"... But the other side of the coin, when I get on it now, after 2-3 seconds I'm already needing to back off, so maybe, there is no point to more power... Since I don't track and likely never will....

[Z OH 6]

Originally Posted by 2SS Capt

Very nice... Part of me wants to give my car to one of these VERY reputable shops and say "Here's $20,000... Make this bitch sing!!!"... But the other side of the coin, when I get on it now, after 2-3 seconds I'm already needing to back off, so maybe, there is no point to more power... Since I don't track and likely never will....

It can be fun chasing power numbers but the reality is 650-700whp is about as much power that you can use on street radials. Beyond that, you're pretty much locked into a drag radial or a super noisy road racing tire like a Toyo R888 if you really want to enjoy the power. I've done both and this is my conclusion on four different RWD platform, Hellcat, ZL1, GT500 and CT5 Blackwing.

[NG329]

Originally Posted by arpad_m

So much power on so little boost, a beautifully elegant and very strong build

I see Ted and the crew have managed to up their game even further... made me think about going back for a 2650 and some exhaust mods Not that I need more power, but I love all the upgrades they developed, they do compound really well.

We didn’t even touch the heads. No porting or valve job. I ran out of money. Haha. Yet, the setup is extremely efficient. I’m not sure what the secret sauce is here but we removed as much restriction as possible.

Most impressive to me is how linear the torque curve is. The car is still going to be drivable on the limit!

[Smokin19]

Originally Posted by Z OH 6

It can be fun chasing power numbers but the reality is 650-700whp is about as much power that you can use on street radials. Beyond that, you're pretty much locked into a drag radial or a super noisy road racing tire like a Toyo R888 if you really want to enjoy the power. I've done both and this is my conclusion on four different RWD platform, Hellcat, ZL1, GT500 and CT5 Blackwing.

Agree completely.

[NG329]

Originally Posted by Z OH 6

It can be fun chasing power numbers but the reality is 650-700whp is about as much power that you can use on street radials. Beyond that, you're pretty much locked into a drag radial or a super noisy road racing tire like a Toyo R888 if you really want to enjoy the power. I've done both and this is my conclusion on four different RWD platform, Hellcat, ZL1, GT500 and CT5 Blackwing.

Imma have to slightly disagree, (but also slightly agree).

Once you get to 650-700hp, you really need to know what you’re doing to get the power down. Before this build, my car made 691whp and I was full throttle often on both street and track with little to no spinning. I ran Yokohama Advan Apex V601 (a 280TW TIRE!!!) on the street and Slicks on the track.

The truth is, most people don’t even run the proper pressures or pay attention to tire temps before spirited driving. I’m pretty confident that I’ll have no problem putting down 800hp.

Otherwise, I feel like I can agree with you when it comes to 90% of hamsters behind the wheel.

[arpad_m]

Originally Posted by Z OH 6

It can be fun chasing power numbers but the reality is 650-700whp is about as much power that you can use on street radials. Beyond that, you're pretty much locked into a drag radial or a super noisy road racing tire like a Toyo R888 if you really want to enjoy the power. I've done both and this is my conclusion on four different RWD platform, Hellcat, ZL1, GT500 and CT5 Blackwing.

100%, that's why I've stayed put since the last upgrade

I can still enjoy my 730-ish rwhp though, just not from a dig, the car has to be rolling for these 315/30/20 PS4S tires to hook. 1st gear is an absolute no-go, even 2nd probably wouldn't work (been a long time since I last tried, unsuccessfully).

That said, OP's new build is so elegant and efficient, it's hard not to be excited about.

[NG329]

841HP now on 12.8lbs of boost.

Squeezed out a few more.

https://youtu.be/436gGDi_Zns

[Revalot]

Beautiful build. One question. What's the limit without the voltage booster on the fuel pump with same set up 800 hp?

[2023_ZL1-AUTO]

Originally Posted by 2SS Capt

Very nice... Part of me wants to give my car to one of these VERY reputable shops and say "Here's $20,000... Make this bitch sing!!!"... But the other side of the coin, when I get on it now, after 2-3 seconds I'm already needing to back off, so maybe, there is no point to more power... Since I don't track and likely never will....

I did that at the end of October 2025, and I'm so glad I did! I called up Mike at Katech, just planning Heads, CAM and oil pump and all that goes with level of build for my ZL1. Then, we kept adding this and that and after Katech had my ZL1 for a few weeks. Mike posted on one of my build thread: "Katech_Mike: We should really just put a 2650 on this thing while we're this far into it "

So we did, we went all out as far as max effort but keep some street drivable but bad AZZ at the track too! I'm glad I pulled the trigger and basically wrote a blank check to Katech for the build. I'm glad Mike gave me a public "push" here on the forum to go max effort! Many members here, including Ted Jannetty had all told me all along. Go with a Maggie, you will thank me later!

I wish I would have done this level of build when I first started doing my mods. But you don't know till you know I guess! It just took 2 1/2 years and a few re-do's to get me where I am now. Regardless of how quick, how many times and what levels of builds we do. It's always a thrill after each is complete and our car feels bad and better again that we enjoy every step of the journey!

[NG329]

Originally Posted by 2023_ZL1-AUTO

I did that at the end of October 2025, and I'm so glad I did! I called up Mike at Katech, just planning Heads, CAM and oil pump and all that goes with level of build for my ZL1. Then, we kept adding this and that and after Katech had my ZL1 for a few weeks. Mike posted on one of my build thread: "Katech_Mike: We should really just put a 2650 on this thing while we're this far into it "

So we did, we went all out as far as max effort but keep some street drivable but bad AZZ at the track too! I'm glad I pulled the trigger and basically wrote a blank check to Katech for the build. I'm glad Mike gave me a public "push" here on the forum to go max effort! Many members here, including Ted Jannetty had all told me all along. Go with a Maggie, you will thank me later!

I wish I would have done this level of build when I first started doing my mods. But you don't know till you know I guess! It just took 2 1/2 years and a few re-do's to get me where I am now. Regardless of how quick, how many times and what levels of builds we do. It's always a thrill after each is complete and our car feels bad and better again that we enjoy every step of the journey!

I actually grew into the car. First year was Ted's 125 package. Then the next year I played with a lot of chassis stuff. Third year was the Magnuson. ...now heading into year 4 with the complete build, and my laptimes showed gradual improvement over the years as well.

In retrospect, you might feel that you should have thrown the kitchen sink at your car sooner. Honestly, slow and steady has its benefits too. Too much power up front could be overwhelming.... and truth be told, I rolled my first ZL1-1LE while taking a road log for Ted. hahaha