Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Duration @ .050: 210 intake; 220 exhaust
Lobe Lift: .3340 intake; .3420 exhaust
Lobe Separation: 112-degrees
Gross Valve Lift: .501 intake; .513 exhaust
853-16 (Comp
2100 (Comp
611-16 (Comp
740-16 (Comp
986-16 (Comp
1412-16 (Comp
201 (Comp
202 (Comp Cam)
5089 (Edelbrock E-Street) Aluminum Cylinder Heads
2.02-inch intake / 1.60-inch exhaust Valves
64-cc Combustion Chambers
RPM Range: Idle – 5,500
0-80770 (Holley Street Avenger) 770-cfm Carburetor
12-834 (Holley) 80 GPH Fuel Pump w/ 3/8-inch Fuel Line
52010 (Power+Plus) Cyclone+Plus Dual Plane Intake Manifold
51-1572 ECC Distributor Cap
51-5582 ECC Rotor
323236 (Patriot) Ceramic-Coated Tight-Tuck Exhaust Headers
1 5/8-inch Primaries
2 ½-inch Collectors
323018 (Corvette Central) 2 ½-inch Aluminum Dual Exhaust
323454 (MAGNAFLOW) 2 ½-inch Mufflers
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
The engine overhaul process has begun. While I have the engine out I want to clean up and coat the exhaust maifolds. Looking for some feedback on what type of coating to use. Spray can paint them myself or have it done by professional ?
When I bought my 1969 427 390 hp it was equipped with a Holley Double pumper spread bore carb. I have been looking at different web sites and reading books and I see that the engine could have been equipped with a Holley or a Rochester q jet carb. any thoughts?
As impressive as the ZL1 was in its day and despite the "larger than life legends" surrounding it, actual engine dyno tests of a certified production line stock ZL1 revealed 376 SAE net HP, with output swelling to 524 Gross HP with the help of optimal carb. and ignition tuning, open long tube racing headers and with no power sapping engine accessories or air cleaner in place. ZL1 DYNO TEST - COPO CAMARO WEBSITE A second engine dyno test conducted on a second production line stock (but recently rebuilt and partially blueprinted) ZL1 revealed nearly identical figures for the various "Gross" conditions.[7]
Period magazine tests of the ZL1 were quite rare due to the rarity of the engine itself. "High Performance Cars" tested a production line stock but well tuned example and recorded a 13.1 second/110 MPH quarter mile, which correlates quite well with the previously referenced 376 Net HP figure. "Super Stock and Drag Racing Magazine" recorded an 11.62 second/122.15 MPH quarter mile in a ZL1 Camaro that was professionally tuned and driven by drag racing legend Dick Harrell, although that car was also equipped with open long tube S&S equal length headers, drag slicks and minor suspension modifications. Using Patrick Hale's Power/Speed formula, the 122.15 MPH trap speed indicated low 11 second ET potential (e.g. with larger drag slicks) and suggested something on the order of 495 "as installed" HP in that modified configuration. This large difference in power suggests that the OEM exhaust manifolds and exhaust system were highly restrictive in the ZL1 application, as was also the case with the similar L88..Sal C
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Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
small set back on the install of engine. I want to put the original shifter back in the car but had to order a mounting plate for the transmission. There are many other things to do, install new vacuum hoses and replace the power steering ram and control valve and hoses.
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
New gaskets ordered. Hopefully this fixes the problem. Some minor tuning and tweaking of eveything and I should be good to go. Thanks to eveyone that commented. This was my first time at a major project on the car.
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
A COMP flat tappet cam was installed with COMP magnum tip rocker arms
I finally got the info on the parts that were installed. 1 MK1099A engine overhaul kit..040 piston and ring set. 280H comp cam kit Comp magnum roller tip rockers.
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Today I finally was able to drive the car for the first time since the engine overhaul. It has been a long process, but it was worth it. Engine sounds great. I am going to drive it around locally to put some miles on the engine. Then I can change the oil and hopefully be good to go. I am still having the issue with the wiper door opening up after you shut down the engine. I am going to have another corvette mechanic take a look and hopefully it is something simple.
I was going to hold off on getting a paint job, but last month the paint shop was slow with work so I bit the bullet and had the car repainted. The car has been in the paint shop for a month!! This is my first time dealing with a repaint of a corvette. I guess this is typical? The car is almost finished. I will try to post some pictures of the new monza red paint