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 overbored 22r what kind of HP should I expect?
#650938
09/29/05 04:02 AM
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Joined: Jun 2002
Posts: 1,698
OP
Body Damage is Cool
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A friend of mine is giving me a tired 22re out of his 1989 pickup. It has somewhat of a rod knock so I may have to source a crank if I can't have this one cleaned up.
Is .040 the max I can bore this motor out to?
Is it worth it to punch it over this much?
I want a torquer 22r motor and was thinking of running o/s valves in it too.
What kind of HP gains would I get out of a overbored motor?
Anything else I should add to this when I build it besides different valves and a rv cam?
Any tips or pointers on this subject would be appreciated.
Thanks
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Re: overbored 22r what kind of HP should I expect?
[Re: SHAD]
#650939
09/29/05 04:11 AM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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Mine is 0.020 oversize and that bumps you from 2366cc to 2392 cc, a whopping 1% increase. I guess 0.040" over would net you a 2% increase in displacement over stock.
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Re: overbored 22r what kind of HP should I expect?
[Re: 4Crawler]
#650940
09/29/05 07:37 AM
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Joined: Aug 2002
Posts: 2,101
Body Damage is Cool
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i know you can got at least 60 over on a 22R, but i don't think it's worth it unless you're having a really hard time finding a good block.
as a rule of thumb on these, punch them out only enough to clean up the cylinder walls. my 20/22 is 40 over because of a deep mystery nick in the #1 cylinder wall when i tore it open.
'79 sport 4x4 longbed <img src="/forums/images/graemlins/smile.gif" alt="" />
20/22R hybrid with EB's OS valves, 268c cam, offy intake, weber 32/36, thorley header, 5 speed swap, 34" LTBs, downey 3" springs, marlin hysteer, 4.88s and locked
'91 4x4 shortbed
22R-E, W56, the dd!
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Re: overbored 22r what kind of HP should I expect?
[Re: kyle-22r]
#650941
09/29/05 12:42 PM
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Joined: Jun 2002
Posts: 1,698
OP
Body Damage is Cool
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Only reason I am concidering even building 22re is it's free to me. I figured some machine shop work might give me some more HP to the motor.
I still want to do a 5mge in my truck but worried about the 5mge motor being alot heavier than the 22re.
Right now my weight distribution is centered pretty well running a g54 transmission in it.
If I had a supra motor I imagine it would be nose heavy because of the addional weight.
That's another reason why I am concidering building a 22re and not putting a 5mge into it.
Last edited by SHAD; 09/29/05 12:45 PM.
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Re: overbored 22r what kind of HP should I expect?
[Re: SHAD]
#650942
09/29/05 09:24 PM
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Joined: Aug 2004
Posts: 361
Mudrunner
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I did 30 over on mine. Didn't notice a whole lot of difference. EB's RV head and cam made a difference though <img src="/forums/images/graemlins/cheers.gif" alt="" />
85 Toy Pickup
89 block 30 over and EB RV head/261 cam
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Re: overbored 22r what kind of HP should I expect?
[Re: SHAD]
#650943
09/29/05 09:27 PM
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Joined: Mar 2004
Posts: 254
Mudrunner
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You should read through this post about the 7mge swap... I believe I remember reading that once the swap was done, there was only an additional 30 pounds of weight! I might have read that on Marlin's Forum where the swap has been documented as well...
1984 Toyota 4x4 Truck, 4.88's, 32x11.50's, weber 32/36, aux gas tank, Warn 9500i, SR5 guages, tilt/altimeter, Alpine stereo with dual 12's behind the seats.
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Re: overbored 22r what kind of HP should I expect?
[Re: 84toyota]
#650944
09/29/05 11:18 PM
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Joined: Apr 2000
Posts: 4,230
Roll Me Over
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Machine work alone will not do much for you. Now if you overbore, blueprint, higher compression pistons, strocker, cam, OS valves, port and polish,ignition, header, and carb you will see an increase and you will also lose reliability and longivity of engine life and it is still a 22r!!!!! <img src="/forums/images/graemlins/lol.gif" alt="" />
David Fritzsche
1990 Ex-Cab V-6,5-speed, with a few mods
04.5 CTD Dodge 2500 Ram--Tow Rig
Roseville, CA
"Serenity through Sobriety"
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