Moedatto Posted August 17, 2010 Report Share Posted August 17, 2010 Hey Rats! I have a 78 620 Short bed that I wasnna do a Z22 block with an L Series head to ultimatly make a L22 From what I gather a bulid like this dosent recomend a closed chamber head because the Z22 has a larger bore and stroke (87mm x 92mm) v.s. the L20b's 85 x 86 and also has a 2cc maller dish in the pistons. So what I wanna know is, If you have done this successfully, what works? i also wanna get a cam! any sugestions?? Quote Link to comment
hang_510 Posted August 17, 2010 Report Share Posted August 17, 2010 If you have done this successfully, what works? any sugestions?? the L head Z block combo works very nice. i suggest searching the jason grey info on LZ frankenstein motors. Quote Link to comment
Moedatto Posted August 17, 2010 Author Report Share Posted August 17, 2010 It says that you have a LZ22 in a wagon? what head do you run on that? Quote Link to comment
Dimerforlife13 Posted August 17, 2010 Report Share Posted August 17, 2010 The U67 head is very commonly used, its off of the L20b's Quote Link to comment
Moedatto Posted August 17, 2010 Author Report Share Posted August 17, 2010 Ok right on! I was looking at that thread and had figured that much haha! are you running the stock cam? does it work well? Quote Link to comment
Dimerforlife13 Posted August 17, 2010 Report Share Posted August 17, 2010 Ok right on! I was looking at that thread and had figured that much haha! are you running the stock cam? does it work well? I just ordered everything for my rebuild, haven't had it together yet. From what I hear they work well, I think it ends up being 9.6:1 or so. I'm going to be running a schneider regrind, but a stock cam should work fine. What are you going to be using for carburation? Quote Link to comment
mike Posted August 17, 2010 Report Share Posted August 17, 2010 For just everyday driveability and mileage a stock L20 cam works great in my 510 wagon with a dogleg and 3:70 gears and knocks down about 30mpg flat. The deeper gears in the 620 should make for some tire frying fun :cool: Also, when I swapped the head (portmatched u67) and headgasket on mine I didnt run the front portion of the L20 head gasket, I just used Greatstuff gasket maker to make the gasket portion between the head and timing cover. Ive only put a few thousand miles on it since then but it hasnt leaked yet. I just made sure everything was VERY clean and grease free. Also Nissan has a one piece gasket that will work for an LZ22 but its kind of spendy. 1 Quote Link to comment
datzenmike Posted August 18, 2010 Report Share Posted August 18, 2010 Hey Rats! I have a 78 620 Short bed that I wasnna do a Z22 block with an L Series head to ultimatly make a L22 From what I gather a bulid like this dosent recomend a closed chamber head because the Z22 has a larger bore and stroke (87mm x 92mm) v.s. the L20b's 85 x 86 and also has a 2cc maller dish in the pistons. So what I wanna know is, If you have done this successfully, what works? i also wanna get a cam! any sugestions?? Not only does the Z22 have 10 % more displacement and 2cc less dish but the L head is about 10cc smaller too!!! This is what bumps the compression the most. A stock Z22 with an open chamber L head is 9.84 compression. With a p-nut head it jumps to 10.48 Quote Link to comment
Moedatto Posted August 19, 2010 Author Report Share Posted August 19, 2010 AWSOME!!! I love seeing all this feedback!! As far as carburation I was thinking Weber 32/36 I have a L20b in my longbed right now and im lucky if I get 22 on the hwy! it also has 400K on it tho.. Quote Link to comment
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