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[Z06] 2017 LT4 swap into 04 C5Z

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Old 10-19-2016, 11:37 PM
  #21  
JonC5Z
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Originally Posted by Podium
If you do heads and cam youll also need exhaust if you dont right now(im sure you know that). You could of course run a custom cam with stock exhaust.
LS6 options
Super budget? Do a heads and cam kit from AI or someone else and run the stock ls6 intake. Youll see at least 430whp (around 500 crank) with supporting mods. 2.5k roughly

Or... Get some AFRs or trickflows, FAST intake make at least 450 rwhp. 4k roughly (Need roller rocker or knock off 400 if you shim the stockers)

I dont see the real advantage or buying a ls3 crate and sticking a cam in it over building the ls6. Cam'd ls3 will make 450-500rwhp. It will make more torque than the smaller ls6 but the lowest entry price is 6.5k on SDPC website. Used ones are cheaper, but you have no idea the true condition of a motor unless you know its history. Thats just for a stock motor. Add a cam kit and youre looking at 7.5k.

High end H/C/I LS6 build is at least 3k cheaper. The extra 20 or 30 torque isnt worth the extra 3.5k IMO.

These are just estimates,close but estimates. If you really want a crate motor with a supercharger I would go with the LSA crate engine from SDPC. Its 11k and will bolt up to your stock stuff. You will need a few things to run the gen 4 motor with your 411 pcm(gen 3), they around around 300 I believe.


Im pretty sure no matter what roots style blower you go with, youlll need to change hoods but I could be wrong. Hope that helps.


Im going with A&A supercharger myself. MPGS are great for the power, Keeps stock hood and with the right mods I dont have to worry about a C7z06.
Awesome. Thanks for all the info. There are many options on which way to go... still getting a feel for it all. I believe that's correct regarding the roots blower requiring a hood change.

Leaning toward the NA LS3 route, I've been looking into starting with a used L92, L9H, or similar truck sourced engine, but like you mention it's tough to know the true condition without breaking it down and possibly rebuilding (also, what's up with the VVT in some of these engines? Was VVT also in the auto camaro?). I'm also looking into the stroker LS3 option using said junker as a base, forking up the extra cash for the rotating assembly, having the heads ported, block machined, and building the motor myself... Sell the LS6 for whatever I can get to offset some of the cost.
Old 10-20-2016, 08:38 PM
  #22  
dagon138
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Like others said.. modified or stock, unless your current engine is messed up... it's not worth the $ and effort to go Ls3 over your working Ls6. The power differential is not big, and the wet-sumped LS3 is well known to blow-up due to oil starvation issues more often than the ls6.
Old 10-20-2016, 09:03 PM
  #23  
JonC5Z
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Originally Posted by dagon138

Like others said.. modified or stock, unless your current engine is messed up... it's not worth the $ and effort to go Ls3 over your working Ls6. The power differential is not big, and the wet-sumped LS3 is well known to blow-up due to oil starvation issues more often than the ls6.
Your mentioning it is the first I've heard it being a well known problem
Old 10-21-2016, 10:54 AM
  #24  
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I like the extra cubes as well and prefer a less high-strung engine, but the LS6 has proven very durable. I currently have a mild cam in my LS6 and make 420/400...very enjoyable on the street. I took a step down from my 650rwhp Z28, but overall the Z06 is much more fun. IMHO, 500-525rwhp NA in the C5Z would be perfect.
Old 10-21-2016, 05:40 PM
  #25  
zeevette
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Originally Posted by danziger
I like the extra cubes as well and prefer a less high-strung engine, but the LS6 has proven very durable. I currently have a mild cam in my LS6 and make 420/400...very enjoyable on the street. I took a step down from my 650rwhp Z28, but overall the Z06 is much more fun. IMHO, 500-525rwhp NA in the C5Z would be perfect.

When I was still NA, I'd gone to the expense of putting together a nice motor that had 483/432 without touching the block. It was strictly a street car, but had way more power than I have driver skills, and I supercharged it anyway. Whatever; you can do either with your LS6.
Old 10-22-2016, 07:58 PM
  #26  
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Originally Posted by danziger
I like the extra cubes as well and prefer a less high-strung engine, but the LS6 has proven very durable. I currently have a mild cam in my LS6 and make 420/400...very enjoyable on the street. I took a step down from my 650rwhp Z28, but overall the Z06 is much more fun. IMHO, 500-525rwhp NA in the C5Z would be perfect.
500-525rwhp is possible on a 5.7 NA? Show me a build list and I'll do it
Old 10-22-2016, 08:01 PM
  #27  
JonC5Z
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Originally Posted by zeevette
When I was still NA, I'd gone to the expense of putting together a nice motor that had 483/432 without touching the block. It was strictly a street car, but had way more power than I have driver skills, and I supercharged it anyway. Whatever; you can do either with your LS6.
How much power can the stock LS6 short block handle with a blower? Is it comparable to what I've heard on the LS3?
Old 10-23-2016, 02:52 PM
  #28  
bikeriderga
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Build the LS6 as others have said. Will be cheaper and will easily mesh with the other components in your C5 Z06.

If the LS6 is worn or not reliable, then a LS3 crate performance motor is not a bad choice. An LS7 would be the best for track/street, but they are still on the high side in crate form.
Old 10-23-2016, 04:51 PM
  #29  
dagon138
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Originally Posted by JonC5Z
Your mentioning it is the first I've heard it being a well known problem
Well then you haven't been doing your research well.
Do some searches on the Road Racing Forum, and comeback.
The WetSump Ls2,Ls3 were complained about frequently by the SCCA racers, hence why GM ended up offering Dry-sump LS3's towards the end.
The Ls6 isn't without it's own issues (springs), but the bat-wing oil pan seemed to work better than the LS2/LS3 versions.

Last edited by dagon138; 10-23-2016 at 04:53 PM.
Old 10-24-2016, 12:33 AM
  #30  
bikeriderga
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Originally Posted by JonC5Z
500-525rwhp is possible on a 5.7 NA? Show me a build list and I'll do it
Possible, but not cheap!

Here is a list to get you very, very close from Vengeance Racing. Claimed HP is 575-580 crank, which is about 490-501 RWHP with a 12-15% drive train loss.

Of course you could add a tad more with a bore and/or stroke kit.

Vararan Cold Air Induction System

FAST 92mm Intake Manifold Fully Ported by VR

Nick Williams 92mm Drive by Wire Throttle body

Throttle body Adapter Harness

Fast Intake Gaskets

Mast or TFS CNC Cylinder 215cc Heads- Fully Assembled

ARP Head Bolts

Comp High Performance Lifters

Vengeance Racing Custom Camshaft

Vengeance Racing Dual Spring Kit with Ti Retainers

Trunion Upgrade

Katech C5R Timing Chain

ARP Cam Bolts

GM LS7 Crank Bolt

All Gaskets & Seals

ATI 10% Underdrive LS2 Damper

Appropriate Serpentine belts

American Racing stainless long tube header system with CATTED X pipe

GM Exhaust Manifold Gaskets

NGK TR55 Spark Plugs

VR High Temp protective Heat Sleeves

160* Thermostat

Billet Catch Can with AN Fittings/Lines

VR Valve cover breather

Vengeance Racing High Flow Fuel Injectors

DexCool Coolant

Redline Water Wetter

Royal Purple 10W40 HPS Oil

AC Delco Oil Filter

Complete/Professional Installation

Custom ECU Calibration- Street & Dyno
Old 10-24-2016, 10:55 AM
  #31  
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Originally Posted by JonC5Z
How much power can the stock LS6 short block handle with a blower? Is it comparable to what I've heard on the LS3?
600+ all day. Some people are in the 700's but dont know how safe. Most in the 700's are running meth as well.

Last edited by zdeckich; 10-24-2016 at 10:56 AM.
Old 10-24-2016, 12:17 PM
  #32  
JonC5Z
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Originally Posted by bikeriderga
Possible, but not cheap!

Here is a list to get you very, very close from Vengeance Racing. Claimed HP is 575-580 crank, which is about 490-501 RWHP with a 12-15% drive train loss.

Of course you could add a tad more with a bore and/or stroke kit.

Vararan Cold Air Induction System

FAST 92mm Intake Manifold Fully Ported by VR

Nick Williams 92mm Drive by Wire Throttle body

Throttle body Adapter Harness

Fast Intake Gaskets

Mast or TFS CNC Cylinder 215cc Heads- Fully Assembled

ARP Head Bolts

Comp High Performance Lifters

Vengeance Racing Custom Camshaft

Vengeance Racing Dual Spring Kit with Ti Retainers

Trunion Upgrade

Katech C5R Timing Chain

ARP Cam Bolts

GM LS7 Crank Bolt

All Gaskets & Seals

ATI 10% Underdrive LS2 Damper

Appropriate Serpentine belts

American Racing stainless long tube header system with CATTED X pipe

GM Exhaust Manifold Gaskets

NGK TR55 Spark Plugs

VR High Temp protective Heat Sleeves

160* Thermostat

Billet Catch Can with AN Fittings/Lines

VR Valve cover breather

Vengeance Racing High Flow Fuel Injectors

DexCool Coolant

Redline Water Wetter

Royal Purple 10W40 HPS Oil

AC Delco Oil Filter

Complete/Professional Installation

Custom ECU Calibration- Street & Dyno
Thanks for the info. Was just checking out their site - definitely a good resource to help understand what parts combinations yield what power output with a proper tune. I assume their prices include installation. I might go parts shopping referencing their list, have a local shop port match everything, do the install myself, then get the local guys to tune it.

Last edited by JonC5Z; 10-24-2016 at 12:22 PM.
Old 10-24-2016, 12:24 PM
  #33  
JonC5Z
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Originally Posted by zdeckich
600+ all day. Some people are in the 700's but dont know how safe. Most in the 700's are running meth as well.
Hmm so if I build the top-end then later decide I want to add a blower I'll be limited by the shortblock pretty quickly
Old 10-24-2016, 12:25 PM
  #34  
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Originally Posted by JonC5Z
Hmm so if I build the top-end then later decide I want to add a blower I'll be limited by the shortblock pretty quickly
Best to pick your path now. A lot of what you do for high HP NA doesn't apply or is bad for forced induction.
Old 10-24-2016, 01:26 PM
  #35  
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Originally Posted by etekberg
Best to pick your path now. A lot of what you do for high HP NA doesn't apply or is bad for forced induction.
Yup, understood. For a blower down the road I would be taking a different route vs NA. This is also why I've been looking at the LS3 as a base vs the LS6.

Building the top-end of the LS6 would probably keep me content for a few years, but only if it's designed for NA.

Building a LS3 based stroker on a junkyard shortblock with a modest top-end would cost a bit more, but would yield similar power, and would set me up with a solid base for much more power if I want to invest in it later.
Old 10-24-2016, 01:37 PM
  #36  
etekberg
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Originally Posted by JonC5Z
Yup, understood. For a blower down the road I would be taking a different route vs NA. This is also why I've been looking at the LS3 as a base vs the LS6.

Building the top-end of the LS6 would probably keep me content for a few years, but only if it's designed for NA.

Building a LS3 based stroker on a junkyard shortblock with a modest top-end would cost a bit more, but would yield similar power, and would set me up with a solid base for much more power if I want to invest in it later.
Makes sense to me. I'm doing something similar in that I bought a cheap L92. But others wouldn't necessarily agree and I don't know that I could argue with them on the numbers.
Old 10-24-2016, 02:55 PM
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Originally Posted by JonC5Z
500-525rwhp is possible on a 5.7 NA? Show me a build list and I'll do it
There are 500+rwhp H/C/I builds on stock cubes, but I wouldn't go that route. As I stated, I prefer more displacement.

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Old 10-24-2016, 02:58 PM
  #38  
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Like I said earlier, you could do a relatively budget 402 that would make an easy 500+rwhp for $8K and with forged internals, be ready for some forced induction, or a hit of nitrous. Heck Texas Speed has some 402s at retail for under $9K...
Old 10-24-2016, 03:13 PM
  #39  
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Originally Posted by danziger
Like I said earlier, you could do a relatively budget 402 that would make an easy 500+rwhp for $8K and with forged internals, be ready for some forced induction, or a hit of nitrous. Heck Texas Speed has some 402s at retail for under $9K...
Are you referring to a 402 on an iron 6.0 block? I didn't think the LS6 could be taken much farther than a 383 without being sleeved. I've seen that the iron block is a good base for a budget build, but the extra 100lbs on the front is what holds me back on it since I'm interested in spending a lot of track time with the car.
Old 10-24-2016, 03:18 PM
  #40  
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Originally Posted by etekberg
Makes sense to me. I'm doing something similar in that I bought a cheap L92. But others wouldn't necessarily agree and I don't know that I could argue with them on the numbers.
Yeah, I often circle back to that option as I'm reading up on things and crunching numbers. I've seen used L92 and similar motors going for as little as $2500. Even if I only get $1500 for my LS6, I don't feel bad at all paying $1000-$1500 to start with a LS3 longblock.


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