ronnie93212 Posted March 25, 2009 Report Share Posted March 25, 2009 well my l20b engine that i got in my 620 isnt cutting it what would be a good engine to put in there? And does anyone have one for sale? thanks :) Quote Link to comment
72240z Posted March 25, 2009 Report Share Posted March 25, 2009 Well what kind of duties does the truck need to perform? heh duties :lol: Quote Link to comment
ronnie93212 Posted March 25, 2009 Author Report Share Posted March 25, 2009 well just cruising dont want the rpms running to high like highway dont want it to be all wound up going only 70 Quote Link to comment
moparvwfreak Posted March 25, 2009 Report Share Posted March 25, 2009 i would look into gearing not a motor swap. my little L16 at 60 with a 4spd turns 4k. now if i went 5spd i could drop that down a notch or two. and if i changed the rear gears from 4.3something to 3.90 it would help even that much more. if you just swap motors you will be in the same boat. a motor that is turning 3-4000 RPM at freeway speeds. the motor is not the issue its the gears. the L20 is a great motor from what i hear so i would just stick with that and go Z 5speed trans and higher rear gears if possible. Quote Link to comment
ronnie93212 Posted March 25, 2009 Author Report Share Posted March 25, 2009 hmm that sounds good hmm but if i were to get a different engine what would be the best...? just curious thinking about getting more hp Quote Link to comment
72240z Posted March 25, 2009 Report Share Posted March 25, 2009 Ya I agree with gearing, lots of tranny options to get better cruising. If you still want more maybe build a 2.4, still a bolt in affair but you gain the .4. Quote Link to comment
808DA6 Posted March 25, 2009 Report Share Posted March 25, 2009 Any kind of upgrade/swap beyond the L-series is going to be pretty involved. KA24E is a very good candidate. They're inexpensive and plentiful. A complete engine/trans/wiring/ECU shouldn't run more then $400. If you're going to have a shop perform the work, uhhhhh..........mmmmmm.....maybe $2000-3000? [ice, does that sound about right?] Anyway, search the forum threads (before you get flamed) and take lots of notes. Quite a few of us have knowledge on KA's in 620's. -Brian Quote Link to comment
ronnie93212 Posted March 25, 2009 Author Report Share Posted March 25, 2009 sorry hope i dont get flamed umm what about a l26? Quote Link to comment
808DA6 Posted March 25, 2009 Report Share Posted March 25, 2009 Pretty sure that's an inline 6-cyl dood. ;) Doable, but won't make sense in my opinion. -B Quote Link to comment
72240z Posted March 25, 2009 Report Share Posted March 25, 2009 It's an inline 6 and although any engine can be made to work IN THEORY an inline 6 in that truck its ridiculous.... You can build a 2.4L thats an inline 4 not a inline 6 like from the s30, so it remains bolt in and fairly strait forward. Idk if me suggesting that confused you. Quote Link to comment
datzenmike Posted March 25, 2009 Report Share Posted March 25, 2009 well my l20b engine that i got in my 620 isnt cutting it what would be a good engine to put in there? And does anyone have one for sale? thanks :) well just cruising dont want the rpms running to high like highway dont want it to be all wound up going only 70 Too bad your signature isn't filled out so we know what year truck you have. Did it come stock with an L20B? Do you have a 4 or 5spd? Changing the motor won't change the RPMs on the highway at 70. A V8 will rev the same. If you want lower RPMs you can do two things: 1/ Change the rear end ratio to a 4:11 or 3:889. The problem with this is that performance and acceleration will suffer. OR 2/ If it's a '75 or newer and has a 4spd, it would make sense to put a 5spd in it. This would change nothing in the first 4 gears (no change in performance) but would lower the 5th gear RPMs on the highway by about 80%. Lowering RPMs and increased performance don't mix very well. Make a decision. Quote Link to comment
ronnie93212 Posted March 25, 2009 Author Report Share Posted March 25, 2009 a 1978 datsun 620 and the l20b was the original engine looking for more hp to go faster lol Quote Link to comment
ronnie93212 Posted March 25, 2009 Author Report Share Posted March 25, 2009 would a 350 chevy small block engine do? Quote Link to comment
72240z Posted March 25, 2009 Report Share Posted March 25, 2009 Ah well your changing shit now lol before it was rpm now its faster... Read what mike said again..... Quote Link to comment
ronnie93212 Posted March 25, 2009 Author Report Share Posted March 25, 2009 hahaha im just looking for an engine upgrade i found a chevy 350 small block running complete engine just without the trans for 200 bucks cant beat that Quote Link to comment
datzenmike Posted March 25, 2009 Report Share Posted March 25, 2009 http://forum.ratsun.net/showthread.php?t=848 A 305 would be the same work but a little easier on everyone and everything. Now you could swap a 3:70 or 3:889 diff in to keep the revs down. The 305 would have over twice the L20Bs torque so you wouldn't notice lowering the gears. Quote Link to comment
datsunfish Posted March 25, 2009 Report Share Posted March 25, 2009 An L20b can produce some decent power to play with. The block is strong as hell and a nicely counter weighted crank. Do you have any exhaust upgrades? Intake upgrades? What head? All of these can bump it up substantially. 2-2 1/4" pipe into a performane muffler. Remove all emissions equipment. Get older style exhaust manifold or header. Throw old hitachi carburettor on the shelf and install a weber dgv or dges. All of these things should make a noticeable difference. Spend some more $$ and upgrade the camshaft too. But if you just gotta change it do a ka24 from a nissan pickup. Too much work to stuff in the car motor I hear. Quote Link to comment
ronnie93212 Posted March 25, 2009 Author Report Share Posted March 25, 2009 thanks every i will keep u guys updated on what i do :) Quote Link to comment
72240z Posted March 25, 2009 Report Share Posted March 25, 2009 But if you just gotta change it do a ka24 from a nissan pickup. Too much work to stuff in the car motor I hear. I think that's kind of odd to say. Since ALL datsun trucks came with a 4 cylinder stock. Just about every I4 in a datsun truck comes in a car as well no? So that said, the strongest, most efficient, most powerful, plentiful gas I4 nissan has available in this country seems worth the work to me. Quote Link to comment
datzenmike Posted March 25, 2009 Report Share Posted March 25, 2009 Here's another:http://forum.ratsun.net/showthread.php?t=6953 Now do you really want to go this route? True, the L20B is virtually impossible to blow up because it was designed in an age when it was common to build in extra strength far above what was needed. Long as they have water and oil in them you can't hurt them. A KA is good for at least a 50% increase in power, fits with m/mount mods, not near as heavy as a SBC so won't wreck the handling, better on gas and tons, I mean TONS of after market equipment, s/c, turbo, cams you name it. VG30 would also be interesting and weighs about the same as a KA I believe. From 170 hp and up, way over 200hp with turbo. Quote Link to comment
sdsurf Posted March 25, 2009 Report Share Posted March 25, 2009 Z20 for sale $175 Quote Link to comment
ronnie93212 Posted March 25, 2009 Author Report Share Posted March 25, 2009 will a tranny from a 240sx work on the 620 i found a ka24 and a tranny together 400 bucks Quote Link to comment
datzenmike Posted March 25, 2009 Report Share Posted March 25, 2009 The drive shaft should be shortened, tranny mount prob modified, move the shifter hole back a few inches. The FS5W71C is a much stronger tranny but you could use a Z series tranny ('80-'83 200sx or '81-'86.5 720) and you would not have to change anything to fit it into the 620. Quote Link to comment
ronnie93212 Posted March 25, 2009 Author Report Share Posted March 25, 2009 will it work with my 4 speed then? Quote Link to comment
datzenmike Posted March 25, 2009 Report Share Posted March 25, 2009 No. For best results a Z series tranny is the least work. Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.