Topic: RE head on a Turbo motor. Why not?

[Huhwhye]

Turns out my head is cracked in 2 chambers and warped on the top side.  I'm pissed that I have to fix this again because some shady machine shop sold me a bum head.  And I didn't know enough about these motors when I built it to know any better.  Go figure, they went out of business.

I can get a brand new head plus the machine work for about $350-400 and be done with it.  But its an RE head.

I figure the chambers are smaller.  But how much smaller?

As is with 7.2:1 CR and 6psi its happy on 87 octane.  If I have to run 89 or 91, whatever.  I just want this done ASAP.

[79coyotefrg]

the heads shouldnt matter that much,  the dished pistons are what lowers the compression, 

[79coyotefrg]

make sure you get  a TURBO headgasket,   and get some head studs

[Huhwhye [OP]]

Already had the studs.  Got my gaskets this week.

Did some research.  Looks like the turbo has 30cc bigger chamber.

How much more compression would that give?  It has to be lower than a standard RE since it has dished pistons.

[79coyotefrg]

should put it into the 8.5 range,   about like putting a 20R head on a 22R

[79coyotefrg]

your engine does have the  pistons with the golf ball size hole in the middle right??

[Huhwhye [OP]]

Pistons are aftermarket and have a deep dish.

[brainlessfool]

so just have a mahicne shop hog out the C.C. a bit.  

[Huhwhye [OP]]

That sounds like a decent idea.  I didn't ask the machine shop about that.  They have to cut them anyway for the valve seats.  Might as well hog them out.  Can't be too much money

[Willy Mammoth]

Just clean up the rough cast so there isn't any sharp edges to hold heat and cause pre ignition. The extra compresion will give you a better base HP and more HP under boost with the rite gas. A perssure switch, relay and 15 turn resistor in the water temp sensor circut will give better fuel mixture, protect the motor from pre iginition and give better power. I could give you a diagram on how to wire it if you like.

[kyle_22r]

should put it into the 8.5 range,   about like putting a 20R head on a 22R

huh?  20R is 8.4:1, early 22R is 9.0:1, late 22R is 9.5:1!

[79coyotefrg]

huh? 20R is 8.4:1, early 22R is 9.0:1, late 22R is 9.5:1!

yep  your right,  but he has a 22RTE


and when you put a 20R head on a 22R block the compression goes up to a little over 10:1

[Huhwhye [OP]]

Yes I have a 22RTE

If its less than 9:1 then I think I'm good.  I think I'll go talk to the machine shop on Monday

[Paul_Elbisser]

I don't think there is a diference in the head. But the Cam is diferent.

[Skinny_Pedal]

im putting my 2.6 lc stroker motor in my turbo truck.they claim it puts out 9.5:1. i called lc engineering to see if this would be a problem and they said as long as im running no more than 9 psi it will work fine. the tech told me there motor was really about 9.2:1

[Willy Mammoth]

Come on you gotta push at least 10 to 15 psi or you shoulden't even waist your time with a turbo.    

[Skinny_Pedal]

but its so cool to go to the ricer crowd and say " you dont have a turbo?  my 4x4 has one, i thought all the cool kids were doing it". then walk away laughing

[brainlessfool]

I don't think there is a diference in the head. But the Cam is diferent.

The head on a 22rte is diff. it has bigger C.C. size.