VR Stingray - Build thread (Pics, dyno, updates!)
Thread Starter
Former Vendor
Joined: Dec 2011
Posts: 2,559
Likes: 162
From: Cumming Georgia
VR Stingray - Build thread (Pics, dyno, updates!)
We've had the pleasure of having our very own C7 Stingray in house for a couple of days now (an upgrade over our outgoing C6 Grand Sport) and WOW... What a car! Excellent build quality, fantastic engine, quality suspension and drivetrain upgrades, and amazing looks. The interior is simply amazing. The style and feel of the C7 is truly impressive. Obviously we purchased our C7 to perform research & development on the Gen V LT1 engine & E92 ECU. Stay tuned as this thread will constantly be updated with our findings/modifications/packages etc.....
Day 1: Burnouts.
Yes, with only 8 miles on the odometer we felt the need to leave our mark at the dealership.. Speaking of dealerships, we purchased our 2LT/Z51/Bi Mode equipped Stingray from Rick Hendrick in Duluth Georgia. Dan & Chris are the Corvette Team at Hendrick and both guys have been absolutely amazing to deal with, not only on this purchase but on our 2013 Grand Sport as well. If you are in the market for a new Stingray or a C6 I would definitely consider them when shopping around!!
Unfortunately our Stingray came with chrome wheels... We had to get these coated ASAP to hold us over until our 360 Forged SL10 Concave set up arrives
If anyone is interested in the 20/19 Z51 combo they will be available in 2 to 3 weeks.
The wheels, front grill, and ride height were all tackled at once. We had to drop it and black it out for it to work right in our parking lot!
Of course, we also had to get it on our in-house chassis dyno to make some baseline pulls and get inside the factory E92 ECU for some tuning. Stock, the C7 (manual 7-speed) put down a respectable 423-rwhp and 417 lb-ft of torque. With tuning we picked up 25-rwhp and 34 lb-ft of torque, which you can REALLY feel on the street. Final numbers were 448-rwhp and 451 lb-ft of torque, which is impressive for an otherwise STOCK "base model" Corvette.
Tomorrow our C7 hits the lift for its next round of modifications....
Vengeance Racing custom Camshaft ( Keeping VVT/Deleting DOD)
Vengeance Racing Dual valvespring kit
Vengeance Racing Hardened Pushrods
Katech C5R Timing Chain
Comp Cams Trunion Upgrade
Comp 850-16 Lifters
Pfadt Race Engineering Tri Y Stainless Longtube Headers with 3" ORX
Nitrous Outlet C7 LT1 Plate Kit with Dedicated Fuel System
Custom Tuning VIA Vengeance PCM
We hope to have updated #s on our cam/header package by the end of the week!! We will update this post during the build and post an idle clip as soon as it is available!!
Aside from camshaft development we are currently working on CNCd LT1 cylinder heads as well as a custom turbo system over the winter.
For those of you who are new to the Corvette community and havent heard of Vengeance Racing I would encourage you to check out our website at www.VengeanceRacing.net .. You can check out several of our featured builds on our forum as well at http://forum.vengeanceracing.net/forum.php
Feel free to PM/email/Post any questions you might have.
Day 1 Teardown begins
Half hour later all engine covers/PCV/shrouding has been removed
Factory Exhaust Vs Pfadt Tri Y Headers & X pipe
Newly designed valve covers. Notice the baffling/oil drain back provisions. GM Really stepped up their game here
LT1 Intake Manifold- Once we removed the multitude of engine covers and insulation we found the actual intake manifold itself...
NOTE: For anyone removing their intake at home, the insulation cannot be removed without the intake without damaging the insulation.
LT1 Waterpump
LT1 Thermostat/Housing
GM went to a plastic housing and the thermostat is that of a Gen III LS1 (part of the housing itself)
Engine Bay shot with valve covers/intake removed
Here you can see the fuel rails/DI fuel pump
Another angle... Hey something familiar.. Check out the rocker arms
Close of shot of a DI injector
Getting closer- One cylinder head down, one to go
Close up shot of shortblock. Notice the shape of the pistons
DOD Lifters
Day 2 Progress
Combustion Chamber Pics.. Notice the DI Injector provision
Front Sway bar & Streering rack are removed for access to front cover
Front Cover Removed revealing VVT Cam Gear and newly designed oil pump
Unfortunately the days of simply lowering the oil pan to remove the oil pump are long gone. The new LT1 oil pump sits much deeper in the pan and GMs use of RTV sealant instead of gaskets makes removing the oil pan completely the only option. Fortunately this is doable with the engine in the car with a bit of creative thinking
A look inside the Z51 Dry Sump Oil Pan
GM LT1 Dry Sump Oil Pump- The 2nd picture shows not only the pick up, but the bolt and portion of the oil pump that sits nearly an inch inside of the pan.
GM LT1 Fuel Pump
This is the "Lifter" the fuel pump rides on
Out with the old... In with the new
Checker springs to verify PTV
Verifying PTV-
New VR Camshaft/Katech C5R Timing Chain & Comp VVT Phaser Limiter installed and engine going back together.. This wraps up day two progress
Final Day Assembly Pics
Checking Install height on LT1 cylinder heads with our VR Dual Spring Kit
One head down... One to go...
As mentioned above we went with Pfadt Tri Y Stainless Longtubes. The driver side went in with no issue and fit so well it had to be held in place to avoid falling out of the car. The passenger side did take a little work, but nothing we arent used to. As you can see, we spaced the cradle down a bit and the header slid right in.
Here is a shot of the complete exhaust system
With both cylinder heads in place it was time to install pushrods/rockers... Here is a nice shot of why we upgrade the factory rocker arms with the Comp Trunion Kit. I dont know anyone who feels its a good idea to have all of these needle bearings making their way thru your engine...
OE Rocker arm with trunion upgrade installed
Final button up of engine
We aren't 100% finished with tuning just yet, but we have a few other cars that need our attention so this is it for today...
We will get back on the dyno in the next day or two and dial in the VVT on the bottom end. I believe there is some additional power under the curve to be had with additional tuning.
We also have LMRs new CAI on the way for testing as we saw MAP readings drop to 90kpa above 4500rpm... The next step will be CNC LT1 Cylinder Heads
Last but not least here is the idle clip...
Day 1: Burnouts.
Yes, with only 8 miles on the odometer we felt the need to leave our mark at the dealership.. Speaking of dealerships, we purchased our 2LT/Z51/Bi Mode equipped Stingray from Rick Hendrick in Duluth Georgia. Dan & Chris are the Corvette Team at Hendrick and both guys have been absolutely amazing to deal with, not only on this purchase but on our 2013 Grand Sport as well. If you are in the market for a new Stingray or a C6 I would definitely consider them when shopping around!!Unfortunately our Stingray came with chrome wheels... We had to get these coated ASAP to hold us over until our 360 Forged SL10 Concave set up arrives
If anyone is interested in the 20/19 Z51 combo they will be available in 2 to 3 weeks.The wheels, front grill, and ride height were all tackled at once. We had to drop it and black it out for it to work right in our parking lot!
Of course, we also had to get it on our in-house chassis dyno to make some baseline pulls and get inside the factory E92 ECU for some tuning. Stock, the C7 (manual 7-speed) put down a respectable 423-rwhp and 417 lb-ft of torque. With tuning we picked up 25-rwhp and 34 lb-ft of torque, which you can REALLY feel on the street. Final numbers were 448-rwhp and 451 lb-ft of torque, which is impressive for an otherwise STOCK "base model" Corvette.
Tomorrow our C7 hits the lift for its next round of modifications....
Vengeance Racing custom Camshaft ( Keeping VVT/Deleting DOD)
Vengeance Racing Dual valvespring kit
Vengeance Racing Hardened Pushrods
Katech C5R Timing Chain
Comp Cams Trunion Upgrade
Comp 850-16 Lifters
Pfadt Race Engineering Tri Y Stainless Longtube Headers with 3" ORX
Nitrous Outlet C7 LT1 Plate Kit with Dedicated Fuel System
Custom Tuning VIA Vengeance PCM
We hope to have updated #s on our cam/header package by the end of the week!! We will update this post during the build and post an idle clip as soon as it is available!!
Aside from camshaft development we are currently working on CNCd LT1 cylinder heads as well as a custom turbo system over the winter.
For those of you who are new to the Corvette community and havent heard of Vengeance Racing I would encourage you to check out our website at www.VengeanceRacing.net .. You can check out several of our featured builds on our forum as well at http://forum.vengeanceracing.net/forum.php
Feel free to PM/email/Post any questions you might have.
Day 1 Teardown begins
Half hour later all engine covers/PCV/shrouding has been removed
Factory Exhaust Vs Pfadt Tri Y Headers & X pipe
Newly designed valve covers. Notice the baffling/oil drain back provisions. GM Really stepped up their game here
LT1 Intake Manifold- Once we removed the multitude of engine covers and insulation we found the actual intake manifold itself...
NOTE: For anyone removing their intake at home, the insulation cannot be removed without the intake without damaging the insulation.
LT1 Waterpump
LT1 Thermostat/Housing
GM went to a plastic housing and the thermostat is that of a Gen III LS1 (part of the housing itself)
Engine Bay shot with valve covers/intake removed
Here you can see the fuel rails/DI fuel pump
Another angle... Hey something familiar.. Check out the rocker arms
Close of shot of a DI injector
Getting closer- One cylinder head down, one to go
Close up shot of shortblock. Notice the shape of the pistons
DOD Lifters
Day 2 Progress
Combustion Chamber Pics.. Notice the DI Injector provision
Front Sway bar & Streering rack are removed for access to front cover
Front Cover Removed revealing VVT Cam Gear and newly designed oil pump
Unfortunately the days of simply lowering the oil pan to remove the oil pump are long gone. The new LT1 oil pump sits much deeper in the pan and GMs use of RTV sealant instead of gaskets makes removing the oil pan completely the only option. Fortunately this is doable with the engine in the car with a bit of creative thinking
A look inside the Z51 Dry Sump Oil Pan
GM LT1 Dry Sump Oil Pump- The 2nd picture shows not only the pick up, but the bolt and portion of the oil pump that sits nearly an inch inside of the pan.
GM LT1 Fuel Pump
This is the "Lifter" the fuel pump rides on
Out with the old... In with the new
Checker springs to verify PTV
Verifying PTV-
New VR Camshaft/Katech C5R Timing Chain & Comp VVT Phaser Limiter installed and engine going back together.. This wraps up day two progress
Final Day Assembly Pics
Checking Install height on LT1 cylinder heads with our VR Dual Spring Kit
One head down... One to go...
As mentioned above we went with Pfadt Tri Y Stainless Longtubes. The driver side went in with no issue and fit so well it had to be held in place to avoid falling out of the car. The passenger side did take a little work, but nothing we arent used to. As you can see, we spaced the cradle down a bit and the header slid right in.
Here is a shot of the complete exhaust system
With both cylinder heads in place it was time to install pushrods/rockers... Here is a nice shot of why we upgrade the factory rocker arms with the Comp Trunion Kit. I dont know anyone who feels its a good idea to have all of these needle bearings making their way thru your engine...
OE Rocker arm with trunion upgrade installed
Final button up of engine
We aren't 100% finished with tuning just yet, but we have a few other cars that need our attention so this is it for today...
We will get back on the dyno in the next day or two and dial in the VVT on the bottom end. I believe there is some additional power under the curve to be had with additional tuning.
We also have LMRs new CAI on the way for testing as we saw MAP readings drop to 90kpa above 4500rpm... The next step will be CNC LT1 Cylinder Heads
Last but not least here is the idle clip...
Last edited by Daniel@Vengeance; Nov 26, 2013 at 05:49 PM.
Thread Starter
Former Vendor
Joined: Dec 2011
Posts: 2,559
Likes: 162
From: Cumming Georgia
This is a Dyno Jet 224X... We were quite impressed with the tuning results ourselves....
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Former Vendor
Joined: Oct 2006
Posts: 2,050
Likes: 33
From: Cumming Georgia
Former Vendor
Joined: Oct 2006
Posts: 2,050
Likes: 33
From: Cumming Georgia
Pfadt Race Engineering Longtube 15lbs each
Pfadt Race Engineering NON Catted X pipe 18lbs
Total- 48lbs
GM LT1 Exhaust Manifold- 15.6lbs each
GM LT1 Cat/Connection Pipe- 11.6lbs each
GM LT1 X pipe with secondary Cats- 26lbs
Total 80.4lbs
Total Savings= 32.4lbs!!!!
Pfadt Race Engineering NON Catted X pipe 18lbs
Total- 48lbs
GM LT1 Exhaust Manifold- 15.6lbs each
GM LT1 Cat/Connection Pipe- 11.6lbs each
GM LT1 X pipe with secondary Cats- 26lbs
Total 80.4lbs
Total Savings= 32.4lbs!!!!
Safety Car
Joined: Dec 2009
Posts: 3,724
Likes: 9
Pfadt Race Engineering Longtube 15lbs each
Pfadt Race Engineering NON Catted X pipe 18lbs
Total- 48lbs
GM LT1 Exhaust Manifold- 15.6lbs each
GM LT1 Cat/Connection Pipe- 11.6lbs each
GM LT1 X pipe with secondary Cats- 26lbs
Total 80.4lbs
Total Savings= 32.4lbs!!!!
Pfadt Race Engineering NON Catted X pipe 18lbs
Total- 48lbs
GM LT1 Exhaust Manifold- 15.6lbs each
GM LT1 Cat/Connection Pipe- 11.6lbs each
GM LT1 X pipe with secondary Cats- 26lbs
Total 80.4lbs
Total Savings= 32.4lbs!!!!
Drifting
Joined: Jul 2009
Posts: 1,358
Likes: 59
I have never handled the dod lifters. They look a lot heavier than the ls type lifters? Are they harder on valvetrain...ie what is it about the dod lifters that is not good for high rpm other than the wt? Thanks.
Former Vendor
Joined: Oct 2006
Posts: 2,050
Likes: 33
From: Cumming Georgia
We will have final assembly pics/idle clip tomorrow morning for everyone. We also hope to have dyno results tomorrow afternoon.
We will be track testing our new modifications next week!!
We will be track testing our new modifications next week!!