I have a 1969 DZ 302 out of a 69 Z28 with a forged steel large journal crank, .60 over pistons, new rods and 2.02 heads. I have two holly 660's on a high rise manifold. What would be a good high rpm cam for this engine? I am also shaving and porting the heads and boaring the block over .60. This motor is for a swamp truck so I need a tough cam.
2007-01-16 01:39:09 · 12 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Chevrolet
DZ 302 WOW ...
Remember this engine was using the Solid lifter Cam most all its life. If someone changed it Make sure when you decide to destroy it that you change push rods, rockers, lifters with the cam you decide on. SO it will last a little bit longer.
Also if you have the Cross Ram intake the engine would sell way more the 6500.00 running...
2007-01-17 18:13:34 · answer #1 · answered by Spinner...428 6 · 0⤊ 0⤋
Call Comp or Crower tech lines. Likely a cam with 240-250 deg of duration and 600 lift would work depending on compression and gearing. Find the specs for the original DZ 302 cam and use that for a starting point.
But I agree with the others. The block and crank are worth way more to a Z/28 restorer. Build a 350 or 383 stroker, if class rules allow it.
2007-01-17 12:11:28 · answer #2 · answered by electron670 3 · 0⤊ 0⤋
Ok I am gonna give you a little advice. Most the guys are right put a 350 instead of the rare engine. Why blow up a classic work of art? Anyway a friend of mine just bent a valve on a 700 hp 400. because he did not take into consideration. His dome pistons he put in. You need all the specs of the engine before buying a cam. Or you will end up just like him having to spend more money after the fact.
2007-01-16 03:38:56 · answer #3 · answered by scott29 2 · 1⤊ 0⤋
I have to agree with everyone else on this one. The crank alone is worth $750-1,000. If you have the entire DZ code long block with the 188 casting heads, you could be looking at $5,000+. I'd sell it and build something that would be better suited to a swamp truck, like a 383 or 406 roller motor or a big block.
2007-01-16 08:58:38 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The weight of the truck would make you need a cam with a "grind" for more torque instead of high horse power.
Not knowing your differential gear ratio, or your transmission...
You need a cam with 110-114 degrees duration, and one with the highest lift in that profile you can find...
That will give that truck maximum pulling power without having to scream the engine wide open all the time.
One four barrel carb and manifold should do it, unless the vehicle never leaves the dragstrip.
2007-01-16 01:51:26 · answer #5 · answered by Anonymous · 0⤊ 1⤋
302 is a Ford engine, yet that would not rely. If it has cylinder heads on it, that's an prolonged block. If the cylinder heads are bumped off, that's a quick block. playstation . If it particularly is the unique engine, it particularly is in all risk the two a 327 or a 350.
2016-12-12 12:36:16 · answer #6 · answered by ? 4 · 0⤊ 0⤋
The DZ was built to thrive in high rpm accell/deccell conditions.With that said what you ask is insane in the fact that this engine was designed for rear wheel horsepower on a level surface through mininimal drivetrain losses(less than 25 hp).Anything more than a 4-speed through a 411 posi for this engine will revert it's performance to nothing more than a 151ci. 4cyl.pushing a 2700lb (chevyII) to a tire breaking-(maybe in the rain-if lucky) accident of ill intention.
2007-01-16 09:33:32 · answer #7 · answered by racer123 5 · 0⤊ 0⤋
build a 383 or 350 and save the 302 for someone who wants to restore a Z
2007-01-16 01:43:36 · answer #8 · answered by Anonymous · 3⤊ 0⤋
I am curious to know why you are not going with a 350 or even a BBC? Call the guys at summit racing. Their techs are very helpful and knowledgeable.
http://www.sumitracing.com/
2007-01-16 01:43:36 · answer #9 · answered by Doug K 5 · 0⤊ 0⤋
Don't use that engine in a swamp truck it is just too rare and valuable.
2007-01-16 18:14:01 · answer #10 · answered by Aviator1013 4 · 0⤊ 0⤋