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Topic: sidedraft mani!
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datsunfish
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bullet Topic: sidedraft mani!
    Posted: 23 June 2004 at 1:50am

I just won a dual dcoe style mani oubviously for a L4 motor on ebay.It was posted under nissan 610 73-77.It was 34$ with shipping.

The only thing is that it is the style that steps up and is not straight through.Will this hit the hood?

Dual dellorto or solex dcoe style carbs are always available on ebay for around 150$ a pair.Are these worthy.Lets think streetability as well as weekend racer.I plan to cam up and port my a87 on l20b block,but when I get it all and still have stock L20b with w58 will I be able to bolt on and go?

71 510 4 door
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72.5 620
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Hainz
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bullet Posted: 23 June 2004 at 8:38am
I have a Mikuni manifold and it steps up also or steps down really to the head in a S pattern. Correct.?
I think Cannon also made these type also with the striaght barrel type manifolds.
That manifold should work fine.

I believe you will have to work a cable type set up accelerator cable.

https://www.rockauto.com/applet3.html You could also order some L18 piston to fit in that L20 to bump up the compression abit more. Order 73 L18 datsun 610. Good price.

The W58 head is a smog head . But you a said you have a A87 which is a square port head. So what is your exhause manifold?

if you want a Cam you should buy new Rockers also $$$ and buy a good cam(Isky,Schneider,Webcam with some lift. at least a 450" or above. More like 470" and abovelift
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Bleach
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bullet Posted: 23 June 2004 at 10:00am
Ya, thanks for the link. That's better than pulling used pistons out of an L18. Have you ordered from them before? it says you need four pistons per engine, then it says sold in packs of four. So is it really only $25 for four pistons or is that $25 each?
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Hainz
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bullet Posted: 23 June 2004 at 10:12am
Bleach I was wondering that myself. Sold in packs of 4.
Order a set!!!!!!!!

I will assume its 25 $ per piston but the MotherFu**** might not know this behind the phone.
I remember they had some L28 flattop Beck Arney pistons 4 for like 85$ a set of 4 cause it said sold in packs of 4. But I didnt get it, it was for a L28 which is a 6 clyinder So I was confused. Also the ring thickness wasnt standard 2mm it was 1.5mm which I found odd as all nissan ones are 2mm ring thickness. Now it not listed on the Carparts.com site so who Knows now. Those might have been ok for a L18. But with L20s out there. I think the L18 dished piston would be a hotter set up.

I found this site cause carparts.com does not list the pistons they used to list. Its changed its format. Be honest they might list(this new site) these parts untill you try to order them. Could be NLA. I already have aset(for my L18) as you know but was thinking of buying another if I ever want a L20. price is not bad. Most are close to 40$ apc.
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Bleach
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bullet Posted: 23 June 2004 at 10:30am

I was thinking I'd order the pistsons and one pack of those premium rings for $44. Maybe some bearings and the bottom end will be set. I'll let you know if I do order them.

As for the sidedrafts, get the smallest diameter they offer. That will offer the best midrange power and "driveability" for daily fun. You only squeeze out tiny bits of added power at high rpms with the larger carbs and they take more air volume (rpms) before the power comes in good. Also, go with an L20b always on sidedrafts for a driver. The added stroke will help hide the loss in torque from the extra large intake volume.

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Hainz
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bullet Posted: 23 June 2004 at 3:52pm
Bleach,
I went to pretend to order on line and it multiplied the piston by quintity so it came out to 99$ for 4.
But that is still a good price.
I might order some more anyway.If still avail.
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Bleach
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bullet Posted: 23 June 2004 at 4:21pm
 ok. the rings better not be $44 each!
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tdaaj
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bullet Posted: 23 June 2004 at 11:06pm
well who knows on the rings. i bought what was supposed to be a set of 6 pistons worth of rings for my ford. came out to be $48, thought it was a good deal for all six. but when i got them it was only for 2 pistons worth. pretty pricey so i then went to another store and bought a complete set for $94. i tried taking the other set back and napa wouldn't take them back cause they were "special" order. but if i knew it was going to only be for 2 pistons i wouldn't have gotten them in the first place. so question is, does any one need 2 pistons worth of rings for a ford 4.2 ltr v6? i have that set i'll let got for half of what i payed for um.
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Ryan in Seattle
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bullet Posted: 24 June 2004 at 12:55am
l18 pistons in an l20, huh? tell me more.....................
1973 620 "Prerunner"
L20B,A87,5spd.Lynx,40dcoe,
header,cammed & bored.
zx oil pump,starter,headbolts
& water pump/pulley.
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Bleach
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bullet Posted: 24 June 2004 at 1:03am
no, that's my secret. Where did you hear about that?
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datsunaholic
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bullet Posted: 24 June 2004 at 1:58am
Stock L18 pistons have less dish that L20B ones but are the same bore (85mm). That = higher compression.

I have a set of dead-flat L20B pistons in a Z20 block. Put a closed-chamber head on that and you might as well have a diesel (and not very long head gasket life).

I also have some flattop pistons in a L14, which is the same bore (83mm) as a L16. And that engine HAD a closed-chamber 219 head on it.
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Hainz
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bullet Posted: 24 June 2004 at 8:39am
Ryan in Seattle,

L28 flat tops(STD size) from a 280zx non turbo 81-83 will fit a L18/L20 that is bore out .040. But better suited for thr L18 and closed chamber head. Flattops in a L20 is more or less too much. Alot of head gasket proplems what I have seen on this board.

A kid in my hood here has put some L18 pistons in his L20 and had not proplems so I think its good but Im sure you have to use a good head gasket. Im sure compression is high due to the longer stroke of the L20.

I would use a closed chamber head for the detonation qualities. Less chance of pinging/run on.

Also if you buy a set of pistons the stock L18 will fit in a L16 if bored out .080 over. So if you have a good bore L18/20 or a L16 those pistons will fit all 3 motors.
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tdaaj
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bullet Posted: 25 June 2004 at 1:38am
boy datsunaholic sure is proud of that 219 head lol.
numourous amount of datsuns
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2 troopers
1 chevy
70 chrysler newport 383 power
71 Plymouth Fury 3 (girlfriends car)
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datsunaholic
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bullet Posted: 25 June 2004 at 2:13am
Point was the L14 with flattops AND a closed-chamber head probably had less compression than a stock L20B, due to the very short stroke. If you look at an "A" series engine, the heads are ALL closed. It's possible a L14 with dished pistons and an open head would have very low compression.

Still trying to figure out what to put it on. I have a L18 with a 210 head but the whole engine probably has to be re-done (hasn't run since at least 1994, though it still turns freely). Might put it on the L20B lower half I have that has a nicely warped U67. But I know that engine needs rings.

The LZ20 block that has the flattops in it came with a W58 smog head, and it had horrendous pinging and run-on problems.
'64 320
'68 520
'72 521 V6
'74,75,79 620s
'76,78 4X4
'76 KC
'72 510 Wgn
'78 B210
'78,81 510 Wgn
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'83 720 KC

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datsunfish
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bullet Posted: 26 June 2004 at 2:16am
I swear that there is a perfect point with the carb and the timing where a w58 will hardly ever run on,but just one little tweek and its gone.Super unleaded really helps too but mine is probably toast now anyways.
71 510 4 door
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earwig
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bullet Posted: 27 June 2004 at 10:06pm
i yanked out the steel exhaust liners and keep my idle speed a little lower than normal. that seems to help it die when i say. with all of this high compression talk i'm thinkin' about how much i'd like to get one of those copper headgaskets. the extra thick one would bring my shaved head about back to stock.
red'76,620regularcab,longbed L20B,Supertrap,3"shackle4"body 31X10.5X15 chrome pathfinder rims,2tube front,1tube rear bumper,720 5speed&transfercase,Blaster coil,Pertronics ingitor dizzy,WeberDGV,K&N
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