APS TT C6 w/ upgrades
The customer purchased the car used and has had many issues since with turbo failures, exhaust leaks, clutch issues and it ran poorly. We got digging into the car and found many, many issues that needed to be resolved and then some as we got deeper into the project:
• The fuel system had standard rubber hose on push lock fitting which was all brittle, burned or ready to crack.
• We found that an induction had come off on the driver’s side and therefore sucked lots of dirt and debris through the turbo which ruined it, packed the drivers intercoolers and unfortunately the motor saw some of this as well. The charge pipes were rubbed through on both sides from improper installation and tire contact.
• There were numerous burned wires and vac. lines.
• 1 broken 02 sensor
• Pass. side downpipe was leaking badly due to missing hardware
• Exhaust poorly adjusted and out of hangers
• Meth system installed incorrectly and therefore not functioning. Washer solvent was used
• The wiring for the meth, true boost & fuel system were a disaster.
• There was low impedance injectors with resistor boxes installed which 1 was broken. The injector harness was all hacked up as well.
• The torque tube input shaft was found damaged upon removal.
• 2 bolts missing from bell housing
• Radiator cradle only in by 1 of the 4 bolts
• Crank pulley wobbling
• Diff and trans seeping and covered in dirt/grime
• Air horns crammed in inner bumper
I think the above notes cover most of the issues…
The route of attack was to perform a leak down and compression test which surprisingly was OK. We then received the go ahead to move forward with the project. The list below is all the new items, repairs, upgrades we performed:
• PRC .650 kit (retained stock cam shaft)
• Comp pushrods
• SLP / PB crank pulley w/ ARP bolt
• GM input shaft, GM pilot bearing,
• DSS 3” driveshaft and couple kit
• McLeod RXT w/ steel flywheel
• GM slave
• AMS remote bleed line
• APS manifolds smoothed and ceramic coated
• APS Z06 intercoolers
• PTE Billet upgrade HP5830’s w/ revised intake tubing
• K&N filters RE-0930’s
• Flush and clean all inlet/charge pipes and intake manifold of dirt, grime and debris
• Readjusted and repair charge pipes. Install new SS couplers in the event of tire contact
• Upgrade AEM to dual nozzle and fab MAF delete pipe which houses nozzles and IAT
• GM 02 sensors with new extensions
• FIC 1000 CC injectors, repaired wiring harness with new clips and removed resistor boxes
• MSD wires
• NGK TR7 plugs
• Revised all fuel lines, fittings and relocated regulator
• Revised all vacuum lines
• Relocated breather catch can
• Designed a relay and fuse distribution block
• Rewired fuel system, meth, true boost
• AEM wideband with custom mounting in center vents w/ meth indicator LED and refinished center console
• M1 50/50 mix for methanol
• Diff and trans fluids serviced
• OEM horns
• Repaired radiator cradle and secured properly
• Lots of heat insulating to protect wiring, fuel lines and vacuum lines.
• 2 bar MAP and AMS Tune via HP Tuners
• Detailed
We wanted to stay safe with the car seeing that is had been thru some hard times, so boost was kept at a safe 10 psi. 93 octane w/ Meth
Results are on our Mustang Dyno are as follows (approx. 10% lower than a Dyno Jet)
584 rwhp / 537 rwtq

The turbo’s come on very fast and due to the car being on plain street tires its worthless 1st-3rd gear and depending on the road only gets decent traction in 4th. The customer picked up the car Friday 9/30 and was very pleased with it driving like stock and getting almost 30mpg on the ride home!
The car went to the track just 2 days later with the same street tires and little seat time, but he still managed an 11.2@133. I know he is working on getting some drag radials to get back out before the season is up to see how it will really run. I think the car is good for mid-lower 10’s at 135+.
Here are some pics of the project :

















Always good to see track times (MPH) posted with the dyno sheets, keeps things real
Thats one of the poorest Corvettes Ive seen, much less a TT one with that much invested in it!
Way to restore it and keep it alive!
Wade- its similar, but that surge tank in the yellow car is pressurized to rail pressure, ours is not. Its an odd setup, but it works. I called him out on Corvetteforum when it was produced.

Not to get off topic but how is Ryan Sprehe? I haven't talked to him in forever.
-W
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similar as in a surge tank yes, but far different in design as Louis mentions and you later cleared up

Thats one of the poorest Corvettes Ive seen, much less a TT one with that much invested in it!
Way to restore it and keep it alive!
Wade- its similar, but that surge tank in the yellow car is pressurized to rail pressure, ours is not. Its an odd setup, but it works. I called him out on Corvetteforum when it was produced.
This surge tank works, but not the way we would want it to due to it's design as mentioned.
thanks Louis
The Best V8 Stories One Small Block at Time
thanks
thanks for the compliments
yeh.. it's sad too when someone has a car done and has no idea themselves. I do not know who owned the car prior other then I believe it came from Colorado as mentioned, but can only hope the previous owner was unaware of the mess and did not intentionally burn the current owner.
I need to do the same very badly. My APS equipped GTO is losing the plastic wiring loom due to it becoming very brittle and crumbling apart. I'm sure it's from the added heat of the turbo system.
I'm tempted wrap it first with stick-on aluminum tape for A/C and heating vents, then cover that with high-temp electrical tape, if such a thing exists.
If there's a better alternative, and I'm sure there is, I'd like to hear about it.
• FIC 1000 CC injectors
• 2 bar MAP and AMS Tune via HP Tuners
If you don't mind sharing, how did you scale for these injectors? I have read of at least a couple different ways to handle large injectors on Gen-IV engines. I haven't decided which to try first. Possibly the AFR scaling since that's the least intrusive. If that doesn't work, then restore the AFR table and totally rescale of all of the other tables by 50%.
Thanks!
Last edited by GNXClone; Oct 19, 2011 at 04:05 PM.
Where did you source the insulation?
I need to do the same very badly. My APS equipped GTO is losing the plastic wiring loom due to it becoming very brittle and crumbling apart. I'm sure it's from the added heat of the turbo system.
I'm tempted wrap it first with stick-on aluminum tape for A/C and heating vents, then cover that with high-temp electrical tape, if such a thing exists.
If there's a better alternative, and I'm sure there is, I'd like to hear about it.
I have the same injectors ready to go on the car. I'm currently running the 2.5 BAR OS from HP Tuners on the E40, speed density, with 60# Siemens/Deka injectors.
If you don't mind sharing, how did you scale for these injectors? I have read of at least a couple different ways to handle large injectors on Gen-IV engines. I haven't decided which to try first. Possibly the AFR scaling since that's the least intrusive. If that doesn't work, then restore the AFR table and totally rescale of all of the other tables by 50%.
Thanks!
I'm sorry for the late reply, but I was at the TX Mile and did not have web access other then my phone and it did not work the best.
to be honest I'm not sure where our engineering dept sources the heat insulation we use in our turbo kits which we pull and use on other builds as needed
tune wise our tuners our both out and I can't ask them at the moment. I do know it took some time to get things in order
sorry I could not be much of a help with these particular questions, but it looks like you got the insulation handled
thanks!







