Welp, pulled the trigger. Part 2 reborn!
Thread Starter
Burning Brakes
Joined: Dec 2017
Posts: 834
Likes: 167
From: New Orleans LA
Welp, pulled the trigger. Part 2 reborn!
For those of you that followed my first thread "well pulled the trigger" know that i had a 2017 grand sport, bought a maggy and long tube headers and x pipe, installed it and totaled the car a week and a half later. Didn't respect the car at all. First time I drove anything other than a truck since I had my 03 cobra back in 03. Learned a hard lesson.
I was able to remove all the parts off of that car. I bought a used 2017 z06 with 8k miles on it. Found the adapters I needed to install the LT1 maggy on my Z06 (thank you edgyette). Now I'm about to install them on the z. I can't wait to get this done. Definitely buying 18" replica wheels and installing 345/35/18 mickeys on it. the cup 2's suck, especially at 42 degrees, but then again most tires would.
I was able to remove all the parts off of that car. I bought a used 2017 z06 with 8k miles on it. Found the adapters I needed to install the LT1 maggy on my Z06 (thank you edgyette). Now I'm about to install them on the z. I can't wait to get this done. Definitely buying 18" replica wheels and installing 345/35/18 mickeys on it. the cup 2's suck, especially at 42 degrees, but then again most tires would.
Safety Car
Joined: May 2003
Posts: 3,535
Likes: 830
From: Brighton Mi
I like to think that I had a hand in moving this stuff over 
At least, planting the seed.
Congrats man, that will be a beast! Have you thought about Toyo r888r's? I have heard good things.
At least, planting the seed.Congrats man, that will be a beast! Have you thought about Toyo r888r's? I have heard good things.
Last edited by spinkick; Mar 8, 2019 at 07:17 PM.
Drifting
Joined: Oct 2002
Posts: 1,898
Likes: 35
From: Fairview Hts. IL
For those of you that followed my first thread "well pulled the trigger" know that i had a 2017 grand sport, bought a maggy and long tube headers and x pipe, installed it and totaled the car a week and a half later. Didn't respect the car at all. First time I drove anything other than a truck since I had my 03 cobra back in 03. Learned a hard lesson.
I was able to remove all the parts off of that car. I bought a used 2017 z06 with 8k miles on it. Found the adapters I needed to install the LT1 maggy on my Z06 (thank you edgyette). Now I'm about to install them on the z. I can't wait to get this done. Definitely buying 18" replica wheels and installing 345/35/18 mickeys on it. the cup 2's suck, especially at 42 degrees, but then again most tires would.
I was able to remove all the parts off of that car. I bought a used 2017 z06 with 8k miles on it. Found the adapters I needed to install the LT1 maggy on my Z06 (thank you edgyette). Now I'm about to install them on the z. I can't wait to get this done. Definitely buying 18" replica wheels and installing 345/35/18 mickeys on it. the cup 2's suck, especially at 42 degrees, but then again most tires would.
WAIT! I take that all back. Try driving the car without wrecking for a while. :-)
Thread Starter
Burning Brakes
Joined: Dec 2017
Posts: 834
Likes: 167
From: New Orleans LA
Yes you did, I'd have sold it without you telling me that. Edgyvette was great, and sold me the adapter plates. Got them in 3 days. I'm buying some replica 18 x 12 z06 wheels and mounting the mickey thompson 345/35/18s on them. Should hook pretty good.
Thread Starter
Burning Brakes
Joined: Dec 2017
Posts: 834
Likes: 167
From: New Orleans LA
That is a great outcome @samwint77 . You have the best in the world now. With the forged internals on the Z, you can crank up the boost right from the beginning. You will end up being limited by the cam on the stock Z. I can't recall for sure, but a buddy did something similar and I think he was running out of fuel in the 650whp range. Can't wait to see your results. If you add a cam and a little alky injection, I bet you can get that baby into the mid 800's pretty easy....
WAIT! I take that all back. Try driving the car without wrecking for a while. :-)
WAIT! I take that all back. Try driving the car without wrecking for a while. :-)
Drifting
Joined: Oct 2002
Posts: 1,898
Likes: 35
From: Fairview Hts. IL
The 75mm with a manual transmission will be right in the 800whp range on e85. I don’t think you will be able to run that much boost without a cam or alky injection. I think without the cam, you will be octane limited at about 650-700whp with the stock cam. If you add a cam and e, you will be able to run in the 800’s pretty easy.
Last edited by hogurt; Mar 12, 2019 at 10:25 PM.
Thread Starter
Burning Brakes
Joined: Dec 2017
Posts: 834
Likes: 167
From: New Orleans LA
cant wait to see. I have the 75mm pulley running 12psi on my car...the 70mm went to 14psi and had bad belt slip (but didn’t matter because Inwas out of injector).
The 75mm with a manual transmission will be right in the 800whp range on e85. I don’t think you will be able to run that much boost without a cam or alky injection. I think without the cam, you will be octane limited at about 650-700whp with the stock cam. If you add a cam and e, you will be able to run in the 800’s pretty easy.
The 75mm with a manual transmission will be right in the 800whp range on e85. I don’t think you will be able to run that much boost without a cam or alky injection. I think without the cam, you will be octane limited at about 650-700whp with the stock cam. If you add a cam and e, you will be able to run in the 800’s pretty easy.
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Drifting
Joined: Jun 2000
Posts: 1,577
Likes: 99
From: Dubai, UAE
Thread Starter
Burning Brakes
Joined: Dec 2017
Posts: 834
Likes: 167
From: New Orleans LA
I might have to start another tread about this build. It has really been a journey top make the lt1 maggy kit work on the lt4 platform. Needed adapter plates, new valley cover, may have some issues with the bolts for the cover of the maggy. Sense the adapter plates raised the maggy up about 1/2" the back bolts are gonna be tight to the cowl. May be hard to tighten. Also the way the adapter plates fit is weird. wwhen you bolt them up before the supercharger is bolted on you can see a gap under the adapter plates. Supposedly the intake or maggy forces them to seal against the heads when you bolt it up. I guess we'll soon see. Hoping its done this week.
Thread Starter
Burning Brakes
Joined: Dec 2017
Posts: 834
Likes: 167
From: New Orleans LA
Man, what a pain in the butt this has been. Had everything running, but found that we had a bad boost leak because of the adapter plates. They didn't sit correctly in the first place. Don't know if it was poor machining or something else. I wound up speaking with Andy at ADM performance. They've actually built 4 cars, 2 zl1's and 2 z06's with lt1 maggys and made them work. So I bought more adapters, mounting hardware, sealing washers and bolts. Basically everything they needed to make it work. So keep your fingers crossed for me.
Safety Car
Joined: May 2003
Posts: 3,535
Likes: 830
From: Brighton Mi
Good luck dude. It will be worth it and then you wont have to worry about it. Mine has been in the shop for 3 weeks because they are so busy. Maggie left out parts in my kit, according to them, so they've had to deal with getting a couple coolant hoses and a bag of misc hardware.
Thread Starter
Burning Brakes
Joined: Dec 2017
Posts: 834
Likes: 167
From: New Orleans LA
The second attempt failed as well. The adapters just aren't sealing because of the way they bolt on. We are trying one last ditch effort, if this don't work I'm starting over. We are going to remove the o rings and use the GM heavy duty sealant between the head and adapter as recommended by people that have been successful with this type of conversion. We'll see how it comes out. Hopefully by today I'll know if its sealing or not.
Thread Starter
Burning Brakes
Joined: Dec 2017
Posts: 834
Likes: 167
From: New Orleans LA
its official, she's no longer leaking boost. Making 12 psi with the 75mm pulley. initial pulls look like over 700 wtq, hp looked lowish. Had some heatsoak issues. tried to get a few pulls in towards the end of the day. we'll she what she puts down tomorrow.
Safety Car
Joined: May 2003
Posts: 3,535
Likes: 830
From: Brighton Mi
Excellent! Is the stock heat exchange for the maggie just not big enough?
Drifting
Joined: Oct 2002
Posts: 1,898
Likes: 35
From: Fairview Hts. IL
Simply put, the Z06 cam sucks for making more power. That’s your bottleneck. If you swap the cam and add e85, it will be a night and day difference. Until then, congrats on the new setup.