Enter your username:
Do you want to login or register?
  • Forgot your password?

    Login / Register



    Page 1 of 5 1 2 3 4 5 LastLast
    Results 1 to 20 of 95
    1. #1
      Join Date
      Apr 2020
      Posts
      80

      1964 Corvette Coupe: Twin Turbo Build

      Hey everyone,

      I thought I would combine a site introduction and a build thread into one and get started over here. The car is a 1964 Corvette coupe that is currently undergoing a 4 month long twin turbo build. This is a pretty massive undertaking (to say the least) that is being spearheaded by my brother. In short, he’s a genius who has forgotten more than I will ever know about cars, with significant experience in high horsepower, forces induction builds and fabrication.

      This is version 3.0 of the car. When I got it in 2016, it had a non-original, period correct 327 with a Muncie 4-speed in it. I took the car on the Power Tour in 2018 and long hauled it, but oiling issues ate the heads up and we decided to build a 383 for the car. The 383 was assembled and combined with a Holley Sniper, TKO-600, and (thankfully) Vintage Air AC and version 2.0 was born. We long hauled it on the HRPT again in 2019, and then we did the Emerald Coast Cruzin’ in PCB, FL, in the fall before we decided to go big with this forced induction build which started in January.

      Here is the car before we started the new build:



      Name:  Adjustments.jpg
Views: 1246
Size:  210.6 KB

      Name:  Adjustments.jpg
Views: 1237
Size:  278.5 KB

      Name:  Adjustments.JPG
Views: 1231
Size:  663.5 KB

      Name:  RenderedImage.jpg
Views: 1223
Size:  704.3 KB

      Name:  Adjustments.jpg
Views: 1226
Size:  327.3 KB

      The plan for the twin turbo build was to go back through the motor and refresh everything to withstand 1000+ horsepower. The block accommodates a hydraulic roller setup with LS7 lifters. The bottom end is a forged GM aftermarket crank and should be good up to 1400-1500 hp. The cam is a custom Comp grind. Heads are World Products Torquer S/R with big valves and a bit of port work, but nothing major. Compression on the motor should be right at 9:1. The intake is a Weiand low-rise single plane that accommodates direct port EFI, which will be managed by Holley HP. The throttle body is a Holley 4150 1000cfm unit. Injectors are Siemens 80lb. The distributor is a Holley Hyperspark that I previously used with the Sniper setup.

      Here’s a few shots of the motor before it went back in the car. The accessory drive is the new Holley Mid-Mount in satin black. It is an extremely nice piece that really compresses everything into a tight package.

      Name:  Adjustments.jpg
Views: 1241
Size:  143.7 KB

      Name:  IMG_1486.jpg
Views: 1227
Size:  128.1 KB

      Name:  IMG_1518.jpg
Views: 1219
Size:  162.8 KB

      LS7 lifter setup in a SBC:

      Name:  IMG_1496.jpg
Views: 1219
Size:  152.5 KB

      Oil cooler lines installed above the oil filter:

      Name:  IMG_1517.jpg
Views: 1220
Size:  80.3 KB

      Motor going back into the car:

      Name:  IMG_1525.JPG
Views: 1208
Size:  586.6 KB

      And back in its home:

      Name:  60479027856__1B12BAE4-D79B-4315-8460-A025907620E4.jpg
Views: 1216
Size:  160.4 KB


    2. #2
      Join Date
      Apr 2020
      Posts
      80
      Fuel system consists of a 450lph in-tank pump with Aeromotive regulator. The tank is a Holley tank made for EFI in a midyear Corvette. All new fuel lines and return lines were run for this build...

      Name:  IMG_1507.jpg
Views: 1201
Size:  100.3 KB

      Name:  IMG_1641.jpg
Views: 1210
Size:  158.9 KB

      We eliminated the stock fan shroud and are using a big Spal fan with a custom shroud. Space comes at a premium in a midyear corvette engine bay and we need all we can get...

      Name:  IMG_1532.JPG
Views: 1208
Size:  471.4 KB

      Name:  IMG_1534.jpg
Views: 1199
Size:  121.4 KB

      Name:  Adjustments.JPG
Views: 1207
Size:  705.3 KB

      My brother is a wizard on fabrication, which you will see illustrated continuously throughout this build. Here’s the new overflow tank for the radiator, crafted to move it back a bit in the fenderwell for more space with a better mounting design:

      Name:  IMG_1551.jpg
Views: 1199
Size:  95.3 KB

      Name:  IMG_1552.jpg
Views: 1207
Size:  131.6 KB

      Name:  IMG_1553.jpg
Views: 1211
Size:  115.7 KB

      Ignition box, fuses and relays mounted on a panel which will go on the firewall:

      Name:  IMG_1549.jpg
Views: 1204
Size:  144.3 KB

      Name:  IMG_1550.jpg
Views: 1206
Size:  134.9 KB

    3. #3
      Join Date
      Apr 2020
      Posts
      80
      Fabrication on the hat begins. We had visions of this thing looking like a cross between an old-school Buick air cleaner and the period correct mechanical fuel injection setup. The hat houses air-to-water intercooler cores on each side that will be fed by the turbos. Blow off valves will be mounted on the front of the hat. The water tank that will feed the intercoolers will be mounted in the driver’s side fender well...more on that in a second...

      Name:  IMG_1569.jpg
Views: 1218
Size:  154.5 KB

      Name:  IMG_1579.jpg
Views: 1213
Size:  153.0 KB

      Name:  IMG_1582.jpg
Views: 1210
Size:  144.1 KB

      Name:  IMG_1583.jpg
Views: 1205
Size:  145.4 KB

      Name:  IMG_1591.JPG
Views: 1199
Size:  587.9 KB

      Name:  IMG_1592.JPG
Views: 1194
Size:  469.7 KB

      Name:  IMG_1593.jpg
Views: 1206
Size:  135.6 KB

      Name:  IMG_1597.jpg
Views: 1212
Size:  162.4 KB

      Here is the hand fabricated water tank. A pump is installed on the bottom that will circulate water to a heat exchanger at the back of the car near the spare tire holder and then back to the intercooler cores. We mounted another small fan on the exchanger for maximum cooling.

      Name:  IMG_1619.jpg
Views: 1202
Size:  121.2 KB

      Name:  Adjustments.JPG
Views: 1194
Size:  443.0 KB

      Name:  IMG_1631.jpg
Views: 1205
Size:  123.1 KB

      Name:  IMG_1625.jpg
Views: 1208
Size:  142.0 KB

      Name:  IMG_1626.jpg
Views: 1217
Size:  168.9 KB

      Name:  IMG_1634.jpg
Views: 1218
Size:  113.6 KB

      Name:  IMG_1611.jpg
Views: 1210
Size:  132.6 KB

      Name:  IMG_1635.jpg
Views: 1206
Size:  134.4 KB

    4. #4
      Join Date
      Apr 2020
      Posts
      80
      Parts to build log-style exhaust manifold arrived and fabrication on the those and the turbo mounting location began. Turbos are 61mm Precision, with Precision wastegates and BOVs. We anticipate tuning this setup to an extremely conservative 800 crank horsepower until the car receives a new chassis and accompanying larger tires, trans strengthening, etc in Version 4.0. Here are the pics everyone has been waiting for:

      Name:  IMG_1618.jpg
Views: 1202
Size:  134.0 KB

      Name:  IMG_1644.jpg
Views: 1193
Size:  134.6 KB

      Name:  IMG_1643.jpg
Views: 1214
Size:  164.2 KB

      Name:  IMG_1642.jpg
Views: 1200
Size:  123.9 KB

      Name:  Adjustments.JPG
Views: 1203
Size:  447.8 KB

      Name:  IMG_1564.JPG
Views: 1201
Size:  567.7 KB

      Name:  Adjustments.JPG
Views: 1197
Size:  623.6 KB

      Name:  IMG_1651.jpg
Views: 1206
Size:  147.6 KB

      Name:  IMG_1658.jpg
Views: 1207
Size:  140.3 KB

      Oil cooler is being mounted in the nose of the car. Heavily insulated lines keep engine heat at bay.

      Name:  IMG_1676.jpg
Views: 1208
Size:  149.6 KB

      Name:  IMG_1678.jpg
Views: 1204
Size:  103.4 KB

      The lid for the hat is one of the pieces of the build that my brother and I were most excited about. I wanted to keep the theme of a stock fuel injection appearance, and this is what he came up with and made:

      Name:  IMG_1672.jpg
Views: 1199
Size:  126.4 KB

      Name:  IMG_1673.jpg
Views: 1175
Size:  129.2 KB

      The lid and section of the hat just under the lid will be blasted and satin clear coated to keep the natural finish. Everything else will be satin black.

      Name:  Adjustments.JPG
Views: 1167
Size:  441.4 KB

      Of course we needed stainless radiator plumbing, because of course. They will be powder coated gloss black.

      Name:  Adjustments.jpg
Views: 1170
Size:  174.8 KB

      Name:  IMG_1690.jpg
Views: 1177
Size:  170.5 KB

      PCV setup is hand fabricated in two units. One under vacuum and one under boost:

      Name:  IMG_1708.jpg
Views: 1169
Size:  111.2 KB

      Name:  IMG_1714.jpg
Views: 1177
Size:  118.7 KB

      Name:  IMG_1742.jpg
Views: 1173
Size:  175.4 KB

    5. #5
      Join Date
      Apr 2020
      Posts
      80
      Fabrication of cold side plumbing begins. Charge tubes fabricated and air intake tubes run through the factory radiator support and up into the nose of the car where the air filters are located:

      Name:  Adjustments.JPG
Views: 1165
Size:  508.5 KB

      Name:  IMG_1728.jpg
Views: 1175
Size:  202.6 KB

      Name:  IMG_1729.jpg
Views: 1164
Size:  182.3 KB

      Name:  IMG_1731.jpg
Views: 1172
Size:  218.3 KB

      Name:  IMG_1732.jpg
Views: 1175
Size:  179.7 KB

      We ran a bigger oil pan to accommodate as much oil as possible. We’re big fans of oil. This pan gained us an extra quart, but the steering linkage just hit the pan. Pan comes off and the solution is fabricated:

      Name:  IMG_1766.JPG
Views: 1157
Size:  352.0 KB

      Name:  IMG_1764.jpg
Views: 1168
Size:  121.6 KB

      Name:  IMG_1762.JPG
Views: 1157
Size:  481.9 KB

      Name:  IMG_1761.jpg
Views: 1169
Size:  198.4 KB

      Name:  IMG_1760.JPG
Views: 1155
Size:  396.8 KB

      We got the hat lid and valve covers blasted and they look like factory cast pieces. Really excited about these. Check them out:

      Name:  IMG_1752.jpg
Views: 1169
Size:  135.0 KB

      Name:  Adjustments.jpg
Views: 1167
Size:  86.4 KB

      Compared to original valve cover:

      Name:  IMG_1751.jpg
Views: 1177
Size:  224.5 KB

      That brings us up to where we are today. All plumbing, tanks, shrouds, etc have gone off to powdercoat and we will be wrapping all the hot side components. Engine wiring is left to be done as well as a few other odds and ends before we can turn the key.

      Current status pic (that I couldn’t be more excited about:

      Name:  Adjustments.JPG
Views: 1172
Size:  532.5 KB

      Thanks for letting me share. I’m stoked about this build. It will be on the Power Tour again this year, if it doesn’t get canceled. If it’ does get canceled, me and some close friends will come up with a tour of our own this summer. Either way, this monster is getting on a road trip ASAP.

    6. #6
      Join Date
      May 2012
      Location
      Kansas City, Missouri
      Posts
      427
      Country Flag: United States
      Beautiful car and amazing fabrication skills. I need to borrow ur brother for awhile. Lol

    7. #7
      Join Date
      Oct 2014
      Posts
      249
      Country Flag: United States
      Wow, what a great build! Thanks for sharing!
      1988 Mazda RX7 - Forged LS/T56, 76mm turbo, ProEFI, Ford 8.8 - Sold
      1965 Mustang Coupe - TT Coyote, TR6060, Haltech, big brakes, updated suspension.
      2016 BMW 428iX GranSport - Stock...ish.

    8. #8
      Join Date
      Apr 2020
      Posts
      80
      Thanks for the kind words.

      The exhaust on the car is a bit of a tricky issue. Version 1.0 and 2.0 both used Hooker side exit full-length headers that mated up to a factory style side exhaust pipe. However, because the factory side exhaust was so restrictive, Sweet Thunder made a set of pipes that have a 3” case and 2.5” inner diameter. They’re appropriately named the “GNM”...short for Gives No Mercy. They’re loud and sound amazing.

      Version 2.0 of the car was the same 385cid stroker, but with a Comp 282 hydraulic roller. It sounded absolutely fantastic and was truly perfect for the car. When we decided to do turbos, my brother warned me that the sound would change drastically. The cam is smaller, and now the exhaust is much, much different, for obvious reasons. I was concerned about that, but decided the sacrifice was worth it.

      Even with the 2.5” inner diameter GNM pipes, we were concerned about power loss due to the design setup. We looked at new side exhaust options to open up the exhaust more. Unfortunately, you can only fit a 3.5” pipe under the factory exhaust covers, an no one makes a good muffler with a 3” ID and 3.5” OD case. We even considered fabricating an open 3” pipe with no muffler at all.

      Ultimately, the best option ended up being a set of QTP electric cutouts that will be mounted along the down pipe and under the car. Hopefully now I’ll have a car that’s a little quieter at cruise and on the highway, but still sounds nasty idling along at the touch of a button. Maximum power preserved, too.

      Name:  IMG_1779.jpg
Views: 1096
Size:  150.9 KB

    9. #9
      Join Date
      Apr 2020
      Posts
      80
      Got parts back from powdercoat today. Everything looks perfect.

      Over flow tank, water tank, fan shroud, PCV fittings and intercoolers are satin black:

      Name:  Adjustments.JPG
Views: 1028
Size:  428.0 KB

      Name:  Adjustments.JPG
Views: 1020
Size:  450.8 KB

      Name:  Adjustments.JPG
Views: 1017
Size:  347.6 KB

      Name:  Adjustments.JPG
Views: 1026
Size:  502.8 KB

      Name:  Adjustments.JPG
Views: 1028
Size:  480.9 KB

      Air intake tubes and charge tubes are texture black:

      Name:  Adjustments.jpg
Views: 1027
Size:  193.6 KB

      Name:  Adjustments.jpg
Views: 1032
Size:  117.4 KB

      Name:  Adjustments.JPG
Views: 1028
Size:  508.2 KB

      Radiator plumbing is gloss black:

      Name:  Adjustments.jpg
Views: 1022
Size:  110.2 KB


      Excited to see it all back on the car.

    10. #10
      Join Date
      Jan 2014
      Location
      Norfolk, VA
      Posts
      481
      Country Flag: United States
      Welcome to the forum, and great build! Its always good to see someone else building and driving their C2 as opposed to wiping it down with doilies in a field somewhere while someone else makes sure the color of the stripe on your drive shaft is "correct".
      1972 C20 Suburban
      1964 Corvette Coupe

    11. #11
      Join Date
      Sep 2009
      Posts
      1,936
      Country Flag: United States
      All I can say is WOW. That intake you guys made looks amazing and what's more is that it's very functional. That engine bay looks so neat and tidy. Great job, I'm subscribing for sure.


      1968 Camaro 6.2 w/ LSA, TR6060-Magnum hybrid, Z51 brakes, 12 bolt, Speedtech, Hotchkis, DSE
      1976 T/A LS1, 6 Speed, C5 front brakes, and etc. SOLD

    12. #12
      Join Date
      Feb 2011
      Posts
      271
      Pretty awesome
      70 GTO - Alum 5.3/4L80e, boosting this winter!

    13. #13
      Join Date
      Apr 2020
      Posts
      80
      Quote Originally Posted by FLYNAVY53 View Post
      Welcome to the forum, and great build! Its always good to see someone else building and driving their C2 as opposed to wiping it down with doilies in a field somewhere while someone else makes sure the color of the stripe on your drive shaft is "correct".
      Purists going to hate this one. LOL

      I’m actually trying to keep a retro feel to the build while simultaneously building a street monster. It’s kind of a delicate balance. I felt strongly about keeping the block orange, not chroming everything out, etc. Guess I’m kind of weird that way.

    14. #14
      Join Date
      Apr 2020
      Posts
      80
      Quote Originally Posted by ryeguy2006a View Post
      All I can say is WOW. That intake you guys made looks amazing and what's more is that it's very functional. That engine bay looks so neat and tidy. Great job, I'm subscribing for sure.
      Thanks very much. I’m excited to get it back together now that all the parts are coated. I think we may build a block-off panel to hide the wiper motor and pull the brake booster off and paint it black. I don’t want anything drawing the eye away from the motor.

    15. #15
      Join Date
      Oct 2012
      Location
      Kennewick, WA
      Posts
      255
      Country Flag: United States
      Man, cutting up such a nice second gen Corvette, you're my kind of car guy! Love the car, always wanted one since I was little but will probably never do it.


    16. #16
      Join Date
      Apr 2020
      Posts
      80
      The hat is completely finished. The intercooler cores and inlets are powder coated satin black, while the lid and center section was blasted to a natural finish and coated with Cerakote. Twin Precision BOVs mounted.

      Couldn’t be happier with how this turned out.

      Name:  Adjustments.jpg
Views: 868
Size:  143.3 KB
      Name:  Adjustments.jpg
Views: 877
Size:  128.6 KB

    17. #17
      Join Date
      Jan 2014
      Location
      Norfolk, VA
      Posts
      481
      Country Flag: United States
      oh wow, that turned out beautifully!
      1972 C20 Suburban
      1964 Corvette Coupe

    18. #18
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,576
      Country Flag: United States
      Very clever design for the intake top! I very much like the intercoolers built into the intake.

      What are the two little distribution blocks next to the Bussmann panel?

      Are the intercooler cores divided? I would like to know the water flow path, please.

      Andrew
      Last edited by andrewb70; 04-30-2020 at 09:26 AM.
      1970 GTO Version 2.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    19. #19
      Join Date
      Jun 2016
      Posts
      19
      Awesome workmanship! What type of metal are you using for the intercooler core?

    20. #20
      Join Date
      Apr 2020
      Posts
      80
      Quote Originally Posted by andrewb70 View Post
      Very clever design for the intake top! I very much like the intercoolers built into the intake.

      What are the two little distribution blocks next to the Bussmann panel?

      Are the intercooler cores divided? I would like to know the water flow path, please.

      Andrew
      Those are high capacity relays. One is for the fuel pump and the other is for the fans.

      The intercoolers on each side both have an inlet and outlet on the back. The water tank flows down the driver’s side to a heat exchanger at the back next to the spare tire well and then routes back up the passenger side to the motor in a single 3/4” hose. There is a Y built in there that feeds both intercooler inlets. The intercooler outlets both feed directly back to the water tank in the drivers side fenderwell.

    Page 1 of 5 1 2 3 4 5 LastLast