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I was planning on doing a H/C on my 03Z OR getting in to a C6Z. I have found a built (0 hour - dyno time) LS-7 complete (I think) from intake to LS-2 pan. The motor was built with a C5Z in mind and it has the 24X reluctor wheel. IF i decide to buy this motor and go this route, what little things do I need to make sure I need for this to be successful?
I currently have 1.75" Kooks headers to a x-pipe. Would these headers choke a 7.0 down too much?
Will the stock Z radiator be enough for these cubes?
Will my stock bellhousing fit to this block?
What about the ECM? Will this all talk to eachother?
I plan on doing the clutch at the same time with remote bleeder.
Hopefully some of you that have done this can chime in regarding any pitfalls.
I'd recommend a DeWitts radiator with build in oil cooler.
The bellhousing will work fine.
The ECM will work fine but you will need the appropriate tune for that engine.
You will also need some adaptor harnesses and will need to trim either the block or engine mount for clearance.
Originally Posted by jerkyboy
...Other than an LS-7??
I was planning on doing a H/C on my 03Z OR getting in to a C6Z. I have found a built (0 hour - dyno time) LS-7 complete (I think) from intake to LS-2 pan. The motor was built with a C5Z in mind and it has the 24X reluctor wheel. IF i decide to buy this motor and go this route, what little things do I need to make sure I need for this to be successful?
I currently have 1.75" Kooks headers to a x-pipe. Would these headers choke a 7.0 down too much?
Will the stock Z radiator be enough for these cubes?
Will my stock bellhousing fit to this block?
What about the ECM? Will this all talk to eachother?
I plan on doing the clutch at the same time with remote bleeder.
Hopefully some of you that have done this can chime in regarding any pitfalls.
I was planning on doing a H/C on my 03Z OR getting in to a C6Z. I have found a built (0 hour - dyno time) LS-7 complete (I think) from intake to LS-2 pan. The motor was built with a C5Z in mind and it has the 24X reluctor wheel. IF i decide to buy this motor and go this route, what little things do I need to make sure I need for this to be successful?
I currently have 1.75" Kooks headers to a x-pipe. Would these headers choke a 7.0 down too much? Not at all, I run the same on my LS7 and it puts 580 to the wheels
Will the stock Z radiator be enough for these cubes? Yes, it'll work fine, but a Dewitts would be better.
Will my stock bellhousing fit to this block? Yes
What about the ECM? Will this all talk to eachother? It will, but you'll need an adapter for the new cam sensor, knock sensors, and throttle body. (All available and not that expensive)
You'll also need some Hinson short engine mounts or some Lingenfelter cradle spacers for the engine and a Fast manifold to clear.
I plan on doing the clutch at the same time with remote bleeder.
Hopefully some of you that have done this can chime in regarding any pitfalls.
Keep in mind that you will (eventually) upgrade the rest of the drivetrain...I think many here have thought about what you are thinking. Even if you went forced induction you would eventually overstress parts that were beyond their original design. Good luck!
Thanks all! I thought about supercharging but I love N/A big cube power!
That's $1800 savings not to buy headers. Then I can buy the Dewitts.
Is the LS7 with stock LS7 manifold taller than my LS6? I wasn't aware of that. If so, I'll look in to the Hinson mounts
with the 24X reluctor it comes with, I still need a conversion harness? Where do I get that? the motor comes with a TB. I need to find out exactly what TB and what MAF.
I'm hoping I can make this all happen. I'll definitely keep everyone posted!!
Thanks all! I thought about supercharging but I love N/A big cube power!
That's $1800 savings not to buy headers. Then I can buy the Dewitts.
Is the LS7 with stock LS7 manifold taller than my LS6? I wasn't aware of that. If so, I'll look in to the Hinson mounts
with the 24X reluctor it comes with, I still need a conversion harness? Where do I get that? the motor comes with a TB. I need to find out exactly what TB and what MAF.
I'm hoping I can make this all happen. I'll definitely keep everyone posted!!
Hello!
You are about to start, what am about to finish
About the intakes I can tell you from first hand the the LS7 is taller. Proof of that, is the post I put here, like 2 week ago:
The harness can be bought through Katech store. Good quality, as that is what I got for mine.
Any info you may need, I have an step by step page LS7 install, but on complete yet, as I have not finish... In spanish tough But you could use "Bing" for the translation. Let me know.
The stock LS7 intake manifold will clear the firewall. Mine clears in back by about 1/4-3/8 inch.
You will need a conversion harness for the throttle body. The 24x reluctor will work fine.
You can use your stock MAF.
Originally Posted by jerkyboy
Thanks all! I thought about supercharging but I love N/A big cube power!
That's $1800 savings not to buy headers. Then I can buy the Dewitts.
Is the LS7 with stock LS7 manifold taller than my LS6? I wasn't aware of that. If so, I'll look in to the Hinson mounts
with the 24X reluctor it comes with, I still need a conversion harness? Where do I get that? the motor comes with a TB. I need to find out exactly what TB and what MAF.
I'm hoping I can make this all happen. I'll definitely keep everyone posted!!
LS7 Intake fits just fine, the FAST 102 LS& intake will require some work but as others have said, its a straight forward swap save for some wire harness changes/extensions that are available from Katech. I think it was about $300 for all the necessary harness's.
You will need the DeWitts and I'd look at an oil cooler too. If you get the dewitts rad with the oil cooler, I have their oil cooler lines for the C5 in a box brand new, never used them. Went with a LPE Setrab oil cooler instead. The 1 3/4 headers will be fine, I don't believe mine are hurting me that much or enough to justify going to 1 7/8's.
Ok, please take a look at my parts list and let me know what I'm missing and if you think the $$ look right. My big question is TB... Do I go Nick Williams 102MM or stock LS-7? Will the 102MM fit on the stock manifold?
Engines comes with:
24X reluctor wheel
Fuel rails, injectors
LS-7 intake down
Block drilled for knock sensors
Ok, please take a look at my parts list and let me know what I'm missing and if you think the $$ look right. My big question is TB... Do I go Nick Williams 102MM or stock LS-7? Will the 102MM fit on the stock manifold?
Engines comes with:
24X reluctor wheel
Fuel rails, injectors
LS-7 intake down
Block drilled for knock sensors
I'd do a LS2 TB and I dont think you need the spall fans on the dewitts. My summer oil temps were still at 185-190° normal driving and 210-215° beating on it. Coolant stays around 178-190 with stock fans and dewitts, keep in mind that I have a dry sleeved ERL block which runs a little hotter than an LS7 will or a R.E.D0 sleeved block would.
I would do the couplers while the motor is out, labor should be cheaper, the poly couplers are about 200 each and I may opt for the GM slave, every builder told me to use it and not the aftermarket. I did do a tick bleeder.
I don't know that I'd do the motor mounts either, you have to remember that what you are gaining up top in clearance (if needed) you are giving up in ground clearance for the headers.
I dont think the NW 102 will fit an LS7 intake, what are the engine mods? Are you sure you need a NW 102? I think that money would be better spent on a Halltech Killer Bee II 2001-2004 C5 LS6/LS1 CAI with the 4" LS7 mass air
Last edited by Millenium Z06; Feb 15, 2016 at 03:25 PM.
Here's what I did with my conversion:
C5 stock PCM
24X reluctor wheel(*extremely critical that this is indexed properly to the LS7 crank and welded in place)
C5 LS1 knock sensors must be installed on side of block to be compatible with the C5 PCM, adaptor harness required.
Cam sensor-The LS7 cam sensor is compatible with C5 PCM, but requires relocation from rear to front of motor, adaptor harness required.
LS7 injectors are compatible with C5 PCM, adaptor harness required.
Map Sensor - Existing C5 sensor at rear of stock motor must be relocated to front of LS7 motor, adaptor harness required.
Throttle body - LS7 throttle body will work with C5 PCM, adaptor harness required.
MAF/Intake Temp Sensors- These are separate on a C5 LS1 motor. A newer style LS3 MAF with built in temp sensor was used.
A 1X cam gear
Crank sensor from a 2005 LS2 was used
Hope this helps, mine has been running fine since the install about 4 yrs ago. You will love it once you get it running.
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by jerkyboy
.........
The shop doing the install turned me on to a company called Speartech for adapters. Their pricing is VERY good.
Racetronix also manufactures a full line of LS related adapters and/or extensions with very good prices. It's good to have multiple sources for everything.
LS-7 swap, what all do I need?
But you could use "Bing" for the translation. Let me know.
Probably so, but I'd hate to see an engine get installed and then have an "Uh,oh!" moment. 