View Poll Results: 427 Foundation
Voters: 9. You may not vote on this poll
Help PICK me a
Thread Starter
TECH Resident
iTrader: (12)
Joined: Jul 2004
Posts: 987
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From: Georgetown, IL 61846-1105
Help PICK me a Hey guys,
First off I want to thank you all up front for any information your about to give, or light you will shed in on my situation. I'm working on finishing up my car completely Bumper to Bumper by the end of 2012. So I can acquire my dream car in 2013 when all my bills will be paid for outside of the house.
The car will be a street/strip car that will prob see more AutoX than strip use. I'm not SUPER concerned with the weight side of it as it has sound deadener installed in it. Obviously by admitting I wont be chasing times it's not a HUGE thing to me. I race Motocross in which I focus on to chase times. I just want a toy with some GRIN factor.
Option 1:
LS3 427 with MAST L92 Heads and a FAST 102mm
Option 2:
LSX 427 with MAST LS7 6 Bolt Heads
Option 3:
LSX 427 with GMPP LSX-LS7 heads
I know the LS3 is ready to assembly and go out of the box. However I have a KILLER opportunity to acquire a LSX Block already machined, & prepped for a 427 build with ARP Pro Series studs installed for $2600, but I could have a LS3 Block and Heads for the same cost. I work in Service at a GM Dealer so I can aquire parts at 10% over cost. Just wanting some engine builder's insight. I do not plan on doing any Power Adder outside of MAYBE a small 125 spray kit. Therefore stating that I know the obvious route would be the LS3 it's lighter, and cheaper. However the LSX would provide a bulletproof foundation if I want to go a diff route in the future and the price is 2nd to none on the chance I have. Please help me!!! Thanks!!!
First off I want to thank you all up front for any information your about to give, or light you will shed in on my situation. I'm working on finishing up my car completely Bumper to Bumper by the end of 2012. So I can acquire my dream car in 2013 when all my bills will be paid for outside of the house.
The car will be a street/strip car that will prob see more AutoX than strip use. I'm not SUPER concerned with the weight side of it as it has sound deadener installed in it. Obviously by admitting I wont be chasing times it's not a HUGE thing to me. I race Motocross in which I focus on to chase times. I just want a toy with some GRIN factor.
Option 1:
LS3 427 with MAST L92 Heads and a FAST 102mm
Option 2:
LSX 427 with MAST LS7 6 Bolt Heads
Option 3:
LSX 427 with GMPP LSX-LS7 heads
I know the LS3 is ready to assembly and go out of the box. However I have a KILLER opportunity to acquire a LSX Block already machined, & prepped for a 427 build with ARP Pro Series studs installed for $2600, but I could have a LS3 Block and Heads for the same cost. I work in Service at a GM Dealer so I can aquire parts at 10% over cost. Just wanting some engine builder's insight. I do not plan on doing any Power Adder outside of MAYBE a small 125 spray kit. Therefore stating that I know the obvious route would be the LS3 it's lighter, and cheaper. However the LSX would provide a bulletproof foundation if I want to go a diff route in the future and the price is 2nd to none on the chance I have. Please help me!!! Thanks!!!
Last edited by XxXTransAmXxX; Nov 25, 2010 at 08:07 PM.
Thread Starter
TECH Resident
iTrader: (12)
Joined: Jul 2004
Posts: 987
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From: Georgetown, IL 61846-1105
Forgot I should give a lil info on the car.....
The car will be going through a COMPLETE build as it has started a while ago some of you might remember. Had a 5yr distraction with the car, but everything is good now. The car is a M6 car....T56 will be built, and power flowing through a Moser M9 with 3.73 or 4.10's....
The car will be going through a COMPLETE build as it has started a while ago some of you might remember. Had a 5yr distraction with the car, but everything is good now. The car is a M6 car....T56 will be built, and power flowing through a Moser M9 with 3.73 or 4.10's....
LSX/LS7 427. You could get either the GM LSX block or a LS7 motor at the same 10% over cost right? I would think the complete LS7 would be cheaper than building a LSX 427. Although if you bought the LSX block you'd be able to build it completely how you wanted to. Since you are staying N/A I think the LS7 is stout enough for what you want to do. The LS7 heads and intake can support well over 600hp to the wheels, add a good cam, stout tranny and rear end which you seem to have taken care of and you've got a good reliable driveable combo.
TECH Enthusiast
Joined: May 2008
Posts: 537
Likes: 1
LSX Block with LSX7 heads. Larger bore 427 will breath better than smaller bore LS3 based engine. Realistically, if you are only looking for a street car and a small N2O hit, you might look at a set of nicely ported LS3 heads (WCCH) and end up a very happy guy.
How much power are you looking for?
How much power are you looking for?
Thread Starter
TECH Resident
iTrader: (12)
Joined: Jul 2004
Posts: 987
Likes: 1
From: Georgetown, IL 61846-1105
Well I'd like to be at 550+ I'd be happy with anything over that. My thoughts on it are if I do the LSX then I'm gonna go LS7 styled heads. Since I'm spending the $$ on the LSX large bore might as well get the higher flowing heads as well to benefit from the larger bore to flow more air.
