9.7 with a slight cam sounds perfect.
Yea, Jess' motor was like 10.7 or something with an open head. Such a bad idea. It was pig rich to cool it down. And leaner and it probably would have put a hole in the piston.
LZ20 engine build
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flatcat19
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Re: LZ20 engine build
I remember uberkevin and I taking a trip there. I couldn't even be near the garage because of the raw fuel hitting exhaust smell.
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DRIVEN
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Re: LZ20 engine build
Did that engine start out as my old L20b?
When the only tool you have is a hammer every problem starts to look like a hippy.
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wayno
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Re: LZ20 engine build
I was told by more than one person that what I put together had a 10.8 to 1 compression ratio, Z20s block with flat top pistons and a W53 closed chamber head with stock valves/hardened seats and an RV cam.
This W53 head on a L20b block with the RV cam didn't work well for my work truck, so I made an LZ23 to replace that engine.
Then this work truck engine went into my 520, I was unhappy with the power, so I took this W53 head off and put a 219 head on the block and I was slightly happier, then one day Dmike posted a photo of the L block cam timing, and I figured out every freaking engine I had was off at least one tooth, so I changed all of them and every engine had more power, but I ended up with a knocking issue in the work truck, it is timed at 0 degrees BTDC, I never thought of just deleting the vacuum advance.
So the W53 head was just sitting around and I had the Z20s block in the storage shed, I thought it was just some regular engine out of an 81 Datsun 510 wagon, so I decided to make room in the shed and scrap the Z20s, when I got the head off and seen the flat top pistons I measured the rods and they were 6 inches(152.something mm), so I decided to build this engine with the W53 head with the RV cam as the RV cam does nothing to help torque, but I figured it might help with HP on this Z20s block, so here I am now.
I have around 9 engines around here that are not in anything, I believe all but one will run if I put them in an engine stand, the VG30 did run when Mike Klotz pulled it from the 200SX, but it has sat around for a long time now, it still turns but I have no way to set it up to run it as I know nothing about computer run engines or how to wire them, so it is the one that doesn't run.
This W53 head on a L20b block with the RV cam didn't work well for my work truck, so I made an LZ23 to replace that engine.
Then this work truck engine went into my 520, I was unhappy with the power, so I took this W53 head off and put a 219 head on the block and I was slightly happier, then one day Dmike posted a photo of the L block cam timing, and I figured out every freaking engine I had was off at least one tooth, so I changed all of them and every engine had more power, but I ended up with a knocking issue in the work truck, it is timed at 0 degrees BTDC, I never thought of just deleting the vacuum advance.
So the W53 head was just sitting around and I had the Z20s block in the storage shed, I thought it was just some regular engine out of an 81 Datsun 510 wagon, so I decided to make room in the shed and scrap the Z20s, when I got the head off and seen the flat top pistons I measured the rods and they were 6 inches(152.something mm), so I decided to build this engine with the W53 head with the RV cam as the RV cam does nothing to help torque, but I figured it might help with HP on this Z20s block, so here I am now.
I have around 9 engines around here that are not in anything, I believe all but one will run if I put them in an engine stand, the VG30 did run when Mike Klotz pulled it from the 200SX, but it has sat around for a long time now, it still turns but I have no way to set it up to run it as I know nothing about computer run engines or how to wire them, so it is the one that doesn't run.
“The difference between genius and stupidly is that genius has its limits” Albert Einstein