DaveOtter Posted January 30, 2015 Report Share Posted January 30, 2015 So the new L20b motor I just picked up has V912 cast into the head between #1&2 spark plugs. I have an idea, just want someone elses opinion..... 1 Quote Link to comment
Stoffregen Motorsports Posted January 31, 2015 Report Share Posted January 31, 2015 It is a Nissan replacement casting. They tend to be very good and compare well with a A87 head. When I worked for Rebello we bought them and built them into full race heads, so I don't have any experience using them in "un-cut" form. 1 Quote Link to comment
dr.feltersnatch Posted January 31, 2015 Report Share Posted January 31, 2015 look here http://www.davidcmurphy.com/olddat/html/tech/head_ID_2.htm for more info. 1 Quote Link to comment
Stoffregen Motorsports Posted January 31, 2015 Report Share Posted January 31, 2015 I don't recall the V912 heads as having the large "SSS" intake port. It seems they were a bit smaller. DaveOtter, what are the intake port sizes? 1 Quote Link to comment
DaveOtter Posted January 31, 2015 Author Report Share Posted January 31, 2015 The intake port measures 1.5 inches across. I paid $280 for the running long block. It also has a cam oiler in the valve cover. I'm pretty sure I scored....:-) 1 Quote Link to comment
datzenmike Posted January 31, 2015 Report Share Posted January 31, 2015 The 219 head came from the factory on L16SSS engines (probably on the L18SSS too) and could be ordered like any Nissan part. However, racing is a one way trip for all equipment and the original stock of these heads was used up over time. (as I understand it) Because there was such a demand (mostly racing) for the 219SSS head, Nissan re-issued it under a new and separate casting number, the V912. (219 backwards) You would know better if the A-87 can safely be hogged out to 1.5" but the V912 is already there and could even go larger. 2 Quote Link to comment
DaveOtter Posted January 31, 2015 Author Report Share Posted January 31, 2015 https://www.dropbox.com/s/8e3s8ygcftg54me/20150130_155829.jpg?dl=0 https://www.dropbox.com/s/9dlf6okjzoob3i6/20150130_154346.jpg?dl=0 Quote Link to comment
DaveOtter Posted January 31, 2015 Author Report Share Posted January 31, 2015 I have a single 40 Weber DCOE to feed that head, and a strong street cam. I hope the single DCOE can feed 1.5" ports... 1 Quote Link to comment
wayno Posted January 31, 2015 Report Share Posted January 31, 2015 The head is worth way more than you paid for the whole engine, you scored big time. 2 Quote Link to comment
Doctor510 Posted January 31, 2015 Report Share Posted January 31, 2015 I have a single 40 Weber DCOE to feed that head, and a strong street cam. I hope the single DCOE can feed 1.5" ports... It's not the ports you're feeding, it's the whole package. The ports will give you really good port velocity and overall power. What are the spec's on your "strong street cam"? 1 Quote Link to comment
DaveOtter Posted January 31, 2015 Author Report Share Posted January 31, 2015 per the cam card: .450 lift, 260° duration, 238° duration @ .050 Im sure there are wilder cams...I don't have a clue about the cam on the new head....let me explain 1 Quote Link to comment
DaveOtter Posted January 31, 2015 Author Report Share Posted January 31, 2015 I took the motor out of my 520, tore it all down, took the things that need machine shopping to the machine shop, bought a new WebCam cam, had the innards balanced. I haven't had time to put the thing together, and came across this motor on Craigslist. Talked him from 300 down to 275, didn't have change for a 20, so $280 out the door for the l20b longblock (and clutch and distributor). Got it home this afternoon and discovered what head was on it. Previous owner said he'd been racing it 10-12 years ago, wrecked the car, kept the motor. He also admitted to not being a mechanical kind of guy, and couldn't tell me too much about the particulars of the motor. I really only wanted it to power the 520 until I could find the time to build my freshly machined motor....so the plan is to put this into the 520 and see how it runs.... 1 Quote Link to comment
DaveOtter Posted January 31, 2015 Author Report Share Posted January 31, 2015 If I can get 120 hp out of some combination of these parts, I'll be happy :-) 1 Quote Link to comment
wayno Posted January 31, 2015 Report Share Posted January 31, 2015 What is the intake on this engine, down draft, side draft/drafts? Quote Link to comment
DaveOtter Posted January 31, 2015 Author Report Share Posted January 31, 2015 I bought the engine as a long block, but I have a single 40 Weber DCOE side draft carb and Lynx crossover manifold to put on it. And an early cast exhaust manifold from a 510 4 into 2 into 1 Quote Link to comment
wayno Posted January 31, 2015 Report Share Posted January 31, 2015 That is good, you likely will get decent power out of that setup. The one and a half inch intakes ports, and the big valves in that 912 head do make a difference, that is the head of choice for me, I have spent over a thousand dollars to make what you have bought for under $300.00 Quote Link to comment
DaveOtter Posted January 31, 2015 Author Report Share Posted January 31, 2015 I'll tell my wife that! Maybe she won't bemoan the rest of the cost of the project! 1 Quote Link to comment
Dime Dave Posted January 31, 2015 Report Share Posted January 31, 2015 I ran a single Weber side draft on a similar manifold and found #1 & 4 cylinders would run leaner than #2 & 3. Jetting is a compromise because of the manifold design. 1 Quote Link to comment
Stoffregen Motorsports Posted January 31, 2015 Report Share Posted January 31, 2015 Yeah, I was going to mention that, but I didn't want to poo on his parade. I don't very much like the single side draft either. I have had better (dyno proven) results with a 32/36 DGV, a 38 DGAS, or a Holley 2 bbl on a modified A46 intake manifold. Quote Link to comment
banzai510(hainz) Posted February 3, 2015 Report Share Posted February 3, 2015 best get duals!!!!!!!if you can affordt it. wait for babay forces sale. Thats how I got my 3 sets have total 5 Quote Link to comment
robrob Posted February 6, 2015 Report Share Posted February 6, 2015 Haha did yoy get that motor in nor cal? If so you beat me to it newer got a response from the guy Quote Link to comment
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