Topic: 20R head and other mods

[79toy20r]

I have a 79 20R, but most of them that i have seen have the mechanical fuel pump on the side of the head, but mine has an inline electric fuel pump. I just guessed that someone put an aftermarket fuel pump on it, but there is no block off plate or anything. I'm looking at buying a new head, i think mine is warped, but what head do i have? any help would be great thanks.

[79toy20r [OP]]

So i have a 20R thats getting a hedman header, a 268 cam, 38 weber, new head with larger valves. What else can i do? anybody else running a set-up similiar? how is it? Also whats the best way to adjust the weber for off road? should i just buy a fuel pressure regulator and set it at 2 or 2.5? thanks

[FIREBALL]

Good luck with the carb. Most of those that i've seen on the trail have been problematic. They like to run much more wide open than what we generally use when wheelin. Unless you're mud boggin. They don't seem to like the steep inclines either.
But you're right on, getting it adjusted the right way is going to ve critical.

[79coyotefrg]

So i have a 20R thats getting a hedman header, a 268 cam, 38 weber, new head with larger valves. What else can i do? anybody else running a set-up similiar? how is it? Also whats the best way to adjust the weber for off road? should i just buy a fuel pressure regulator and set it at 2 or 2.5? thanks

put that head on a 80-84 22R block  and you will be impressed,


what are you going to do with the truck,  if rock crawlin  stay away from the weber,  if general 4x4 offroading it will be fine,   my weber will try to flood if i get about a 45 * angle or more,  ive heard a aisin carb for a 22R is best and has the same flow as a 32/36 weber

[79coyotefrg]

I have a 79 20R, but most of them that i have seen have the mechanical fuel pump on the side of the head, but mine has an inline electric fuel pump. I just guessed that someone put an aftermarket fuel pump on it, but there is no block off plate or anything. I'm looking at buying a new head, i think mine is warped, but what head do i have? any help would be great thanks.

my 79 has the pump in the tank  as yours should
any 20R head will bolt right up,  and i would keep the electric pump

[kneedownnate]

Ditto.  You can easily build or obtain a block off plate for the mech. fuel pump mount.  Just put a fuel pump gasket on too and you'll be fine.

[kneedownnate]

getting it adjusted the right way is going to be critical.

And a pregnant dog!  I've run a weber on my 4by for a few years and would say steer clear!  Glen's right about the stock 22r carb, the flow is about 1cfm lower on a stock carb.  If you could find a good clean 22r carb then you could buy the LC engineering adapter from lilbuddy(pm him or find his ad in the for sale section) to run it on a 20r manifold.

[kyle_22r]

a weber car will like the low pressure electric pump that our trucks have.  i think that's why ive never had problems with my weber offroad.