Designed by Vince Piggins The Z-28 Camaro was the car the Chevrolet used to compete in the SCCA Trans Am racing series. SCCA stands for the Sports Car Club of America for those of you that don't know.Powering the Z-28 was a 302 C.I. small block. Chevy engineers simply used the 283's crank and the 327's bore for this little screamer. Originally,this engine was rated at 290 horsepower at 5900 rpm and 290 lb-ft of torque at 4200 rpm for the street version. On the dyno it actually turned out 340 - 350 HP. The Racing version was over 500 and was one of the winningest engines in Chevrolet's history. With a 4.00 in bore,a 3.00 in stroke,aluminum intake manifold sporting an 800 cfm Holley carburetor,a solid lifter 30-30 Duntov camshaft originally used in the 1964 fuel injected 327,and 2.02 cylinder heads the 302 turning into "the most responsive American V-8 we've ever tested". "The 290 hp figure quoted for the Z-28 engine seems ridiculously conservative"
The 302 is also best suited for a manual transmission due to the fact that there was almost no low end torque,not an ideal situation for the street. Although seeing one on the road was rare as a result of just over 600 versions made of the 67.
As tested by Car and Driver, the 67 Z-28 in street tune ripped the quarter mile in 14.9 seconds and had a 0-60 time of 6.7 seconds.
Chevrolet had planned on installing headers on the 302 but,supply problems caused the engine to be shipped out with manifolds. The headers were however a dealership option that did get shipped with the car when they were ordered. One cool litte bit of info,when the 302 hit 8000 RPM it sounded like an "Air raid siren" according to the mayor of Warren,Mich.
The 302 is also best suited for a manual transmission due to the fact that there was almost no low end torque,not an ideal situation for the street. Although seeing one on the road was rare as a result of just over 600 versions made of the 67.
As tested by Car and Driver, the 67 Z-28 in street tune ripped the quarter mile in 14.9 seconds and had a 0-60 time of 6.7 seconds.
Chevrolet had planned on installing headers on the 302 but,supply problems caused the engine to be shipped out with manifolds. The headers were however a dealership option that did get shipped with the car when they were ordered. One cool litte bit of info,when the 302 hit 8000 RPM it sounded like an "Air raid siren" according to the mayor of Warren,Mich.
A key to the 302's performance was the free breathing 2.02 intake,1.60 exhaust cylinder heads.
All the components installed in the 302 were strickly high performance that include forgeged crank,pistons and connecting rods.
Ref,Chevrolet Small Blcok V-8,Anothy Young
Ref,Chevrolet Small Blcok V-8,Anothy Young
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