Horse Power Required?

[Boomez]

Hi all ...I have a 20R with a 4speed with dual transfercase and I'm considering allot of options to gain some HP 'i.e." Holley 350 /electric fan /:-/header etc. I'm wondering if there are any Eng. Swaps that could be incorporated with this tranny? Or any other engine tweaks that would enhance the 20R ?

Regards
Boom

[Hyena]

Header might get you a few more horsepower with a bigger exhaust.  Other then that, you could bore it out, new cam.  Don't know too much about that stuff.

[oddball]

try a weber instead of the holley

[kyle_22r]

22R will bolt in place of the 20R, but doesn't really have any more power.  weber 32/36 isn't a bad carb for this engine.

if you want to put a weber 38 on there, that's 390CFM.  i'd rather put a holley 350 on there, but i hear they don't run well at angles

[brainlessfool]

your not going to beable to bump up the power much with that 4sp. trans. or Kaboom!

[79coyotefrg]

what 4 speed do you hav??   43 is    45 can be made into a 5 speed

ponies??   www.LCEngineering.com  the 20R is bullet proof,  it can be bored .120 to take 22R pistons  or you can find a good 22 block and run some 83celica efi pistons with a big cam or stock 22 pistons and mild cam,  180 HP is easily possible

[Boomez]

I could have sworn that the fellows from MC said that the output shaft on the 4 speed was different than the 5 speed. So my Dual transfercase adapter wont work with a 5speed. Please correct me if I'm wrong...

Boomer

[Thumper]

yes they are i just used the transfer case off my 4 speed for my crawler it will not slide into a 5 speed tranny but all you have too do is grind the input shaft down some or just spline it further thats the only difference between the 4 and 5 speed transfercases just 4 speeds have less splines on the transfercase input shafts.
Good luck and if u blow your 4 speed i got a rebuilt 4 speed with all new berrings syncros and shifterforks and seals ill sell or trade for.
thanks
adam

[Boomez]

Thanks Thumper "just 4 speeds have less splines on the transfercase input shafts" So are you saying that a 5speed will not work With my set up ?

Boom

[79coyotefrg]

Thanks Thumper "just 4 speeds have less splines on the transfercase input shafts" So are you saying that a 5speed will not work With my set up ?

Boom

does your 4 speed have  a removeable aluminum bellhousing or is it all cast iron???     either way you can make a 5 speed work,  like thumper said  just grind the splines down and it will slip right on there

[Boomez]

Yes it has an aluminum section on the rear portion about 6 or so inches.it has an aluminum shifter housing on the side of it as well. i found a 22re out of a 1995 that I will concider putting into it with a five speed. I know its not allot more power than the 20 R but it might help out with the highway speeds I hope. i suppose it would be best to get the harness and ecu etc from the same vehicle to simplify things I just hope its available.... so to recap 1980 4 speed transfercase 1983 donor case with my 4speed attached take out 4 speed  grind down the output shaft of 5 speed and the splines will match the donor case and all is good rework the drive shafts and cross member and then go play ....right?

Regards
Boom

[79coyotefrg]

no,   the tcase input shaft from the 4 speed is what has to be ground off, if you have a 83 tcase it will bolt right up to your 5 spd,  assuming its not made for a forward shift tcase

for  your 80/83  the best tranny in the world would be the 83 model L52


you have a L43 tranny,  i wouldnt waste time with the 95 22re,  get a good 22R 80-84 block  and put that 20R headon that sucker and a weber carb and headers and you will be smokin down the highway

[Boomez]

Thanks 79Coyote now my head is really spinning I must be stupid because I'm still not sure on what works with what lol
1 =I have 1980 transfer case/MC adapter/1983 Donor reduction case? /bolts to an L43 4 speedtrans. As you have identified and thanks." the best tranny in the world would be the 83 model L52" Question would other 5speed trannys work?
2= "Never mind the 22re and get a good 22R 80-84 block" Question would any other year of 22r block work as well?
3="and put that 20R head on that sucker" Question would it mater if the 20R that I have in this truck came from an early Model Toyota car and the head does not have a mechanical fuel pump slot in it? and I continue running the elec.fuel pump
4=or should I just get a totaled 4 Runner/T100/Tacoma with the 3ZR-FE and start from scratch again....

Thanks  fellas for all you help and insight

Boom

[79coyotefrg]

1=   L43 + 83 donor crawlbox +80 tcase      you may need to grind some of the splines off the 80 tcase input shaft, ie  the little stub that will go in the back of your crawl box
and yes any toy tranny will work but the L50 and L52 are short,  same length as the L43,  but since you are adding a crawler  length doesnt really matter

2= any year 22R from 80-84, some 85's might be ok,  what you need is the "tall" block,  in late 84 toyota changed the deck height  you want a 22 Block thats 11.280" from oilpan to head  after 84 were 11.050  or somethin close, almost a 1/4 inch shorter


if you find a 22RE from  83 celica grab it,   or if you rebuild your block you can just order 83 efi pistons
they look like a 20R piston  

3=    the 20R head you have is fine and yes stay with the electric pump if you have one,    but remember a celica has a slightly different cam,  at least my 80 celica did      a .440 cam from LCEngineering would be a swet set up
i run the .460 race cam  but i found at 7000 rpm  valves can come in contact with stuff,     yes  7000 R P M    but thats why  my truck is mostly on the bench at the moment


what this does by putting a 20R head on the early 22 block is raises the compression ratio from 9.2   to around 10,   with a healthy cam and aweber 32/36   you will be AMAZED at  the power you get

and the 20 head flows better by design     

4=or should I just get a totaled 4 Runner/T100/Tacoma with the 3ZR-FE and start from scratch again....

  um   well i guess you can if you really want to

[kyle_22r]

huh?  to my knowledge, there's NO difference between 22R and 22RE pistons of the same vintage.  '81-84 all have the volcano dome and after that they're flat top

[79coyotefrg]

i came across a 83 celica  that was factory efi when i pulled the head ithad pistons like a 20R     maybe it was special i dont know