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Thread: Suddenly a wild Peanut appears...

  1. #101
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    I crushed the screen on my multimeter working on my brothers car I have a stock head here and everything to compare it to, just nothing to measure with. I am on block release so I am pretty much the poorest guy ever.
    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  2. #102
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    80grit intake side.





    Currently at 1.33 vs the stock 1.32 port size, lots of work done deeper in. Hands keep going numb after a session so I have to take breaks. Not really done either side but the vibration off the die grinder kills me after 2 hours of work.
    Last edited by pitobread; 03-02-2012 at 06:45 AM.
    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  3. #103
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    Quote Originally Posted by pitobread View Post
    Hands keep going numb after a session so I have to take breaks. Not really done either side but the vibration off the die grinder kills me after 2 hours of work.
    Been there, done that... even got the t-shirt got my right hand buzzing for 2 days after finishing....

    Can't wait to see your result compared to stock though. Your setup looks very similar to mine exept on the intake side, I'm at 1.4 at the opening tappering to 1.32 right before the valve guide's little hump also finished with 80grit... exhaust is stock size, casting mark removed, but polished a little more, should yield similar results

    Way to go, you're almost there!
    TE31 1977 - 2T-B (traded)
    KE20 1974 - Destroked 7A, project "bigblock A meets peanut" Link to build thread (Sold)
    AE95 1990 - 4A-GZE daily driven wagon...

  4. #104
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    Bought a new cheapie multimeter and a shop vac today just for you Corey. Going to go toy around this afternoon.
    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  5. #105
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    64.03CFM at 1/4" lift intake side (all I could do with current setup, whole rig needs work) stock head.

    67.98CFM at 1/4" lift intake side (rig limited) Half ported

    71.42CFM at 1/4" lift intake side (again rig limited) Finish ported.

    It works! I need to make a proper valve lift rig, fix a few leaks, I think I need to smooth out the air before the maf and need to make a proper head plate with dowels to hold the cylinder square.
    Last edited by pitobread; 03-10-2012 at 05:36 PM.
    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  6. #106
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    How much vacuum are you getting from the shop vac?

    1970 KE17 Project
    1969 KE10 Slider

  7. #107
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    No idea my vaccum gauge is at work. It is a 5.5 peak hp shop vac doing the suction.
    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  8. #108
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    That is rad, even just the preliminary results are promising!

  9. #109
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    I found this graph on the net, used it in a dyno simulator (engine analyzer pro) and actually got very realistic results haha... I figure they're running a tad more vacuum though haha.



    I think its cool theres 3 techy 3tc pages on DK right now. Yours, tommys rocker arm experiment, and sunrays informative compression ratio results.
    Last edited by Cbergerud; 03-10-2012 at 06:49 PM.

    1970 KE17 Project
    1969 KE10 Slider

  10. #110
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    bonus pics:






    1970 KE17 Project
    1969 KE10 Slider

  11. #111
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    Good to know I am going in the right direction. I don't think I am anywhere near 28", maybe if I add 2 more vacuums.

    I am going to make a few adjustments and retest soon and see what I get for results again. Weeeeee.

    You couldn't hog the 3tc head out much without welding. Those holes under the intake would get in the way, I would be paranoid of cutting through. Glad I used a 2tc head, I did alot of work in past those area's.
    Last edited by pitobread; 03-10-2012 at 07:40 PM.
    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  12. #112
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    On the first 3t head I tried porting I went thru into the lower hole on the intake, and broke thru the spring seat!!
    Haha
    It was like 1/4" bigger!
    The one I got good was probably really close.
    I opened it up alot.
    Haha
    There is room to improve, but you can't really reshape the runner.
    I tried to raise the roof and Smooth out the radius as much as possible.
    The exhaust side I opened up a huge amount, the threads on the air pump holes were exposed!

  13. #113
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    I'm looking at getting a mild cam regrind and head shave, so I should do a little porting while I'm at it, but I don't want to spend too much time on it nor do I want to ruin the head. I think I'll mostly attack those inner radii, and the hump on the floor of the intake side. I have some mysterious head with completely undrilled EGR holes. Apparently those don't even exist, I got it on ebay as a "factory rebuilt" 2TC head for $100.

    I thought 3t and 2t heads were functionally identical?

    1970 KE17 Project
    1969 KE10 Slider

  14. #114
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    Functionally they may be the same, but my 2t head the radius before the valve face is MUCH less(more abrupt), that hole underneath has more material IIRC(shallower hole) and they exhaust ports don't have that hump after the threads exiting the port(same bore dia to the radius) So it is definitely a bit different casting wise. I wonder if thats why they say run a 2t head on a 3t

    Now I wish I didn't give that head to my dad for scrap, I could have cut it down the middle like that one to compare.

    I will have to double check on that hole depth under the intake but I think it is only like 1/2 inch on a 2t, could be wrong about that tho.

    if it doesn't have drilled EGR holes it's an -73 2t head? Chris would know for sure. I am kinda going under the assumption that the picture is a 3t head and mine was different than that, but I am 2nd guessing myself now. I will have to check my stock 2tc head when I get home to be certain.
    Last edited by pitobread; 03-11-2012 at 06:23 AM.
    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  15. #115
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    Looks different under there to me, but hard to tell for certain due to the picture angles.
    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  16. #116
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    Tommys stock 2t head, no bumps on exhaust side. So I am at least right there, haha.
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    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  17. #117
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    My EGR port are not drilled through either... When I'll lift my sotck 2T-C head from my '77 (which has EGR), I'll take some picture... maybe it's not a 2T-C/3T-C kind of thing, but more of a EGR/no-EGR thing

    Here is an other picture, just after removing the casting... I didn't reshape or enlarge the exhaust side, all I did after this is surface sanding... looks very different from the 3T-C

    TE31 1977 - 2T-B (traded)
    KE20 1974 - Destroked 7A, project "bigblock A meets peanut" Link to build thread (Sold)
    AE95 1990 - 4A-GZE daily driven wagon...

  18. #118
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    I am curious what the casting numbers are for your heads (Numbers under the front under the valve cover or over the 2nd port on the exhaust side)

    I have a 63 head, AIR holes, don't know CC size, no humps

    and the worked head is an 80 head, AIR holes, don't know CC size, no humps.

    Tommy one of yours looks like a 61 head, AIR holes but not all the way through, no humps.

    I have one on the car too, it is a 78(year), has holes IIRC but I don't have all the info.
    Last edited by pitobread; 03-11-2012 at 10:47 AM.
    1987 Corolla GTS Hatch | 1985 Corolla GTS Coupe | 1987 Corolla GTS Coupe | 1992 Tercel CE | 1992 Paseo | 2003 Corolla CE | 1974 Corolla 4 Door | 1978 Corolla Coupe | 1979 Corolla Hatch SR5 | <3||||||1990 Miata |||||| <3
    I like Toyota's wanna fight about it?

  19. #119
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    Chamber volume is between 67 and 68cc (did it with a 10cc syringe so it's not as accurate as the burette method...)

    The number over exhaust port #2 is indeed 61, and is the same as the number right by the トヨタ sign under the valve cover. On the other side of that トヨタ sign, right on the edge of the head under the valve cover, there is a casting number that looks like hand writen, it reads 627 although I have no idea what it means...

    I need to adjust the valves on my stock head somewhere this week, I'll check the casting numbers while I'm there.. It the stock head from my '77 2T-C with air holes
    TE31 1977 - 2T-B (traded)
    KE20 1974 - Destroked 7A, project "bigblock A meets peanut" Link to build thread (Sold)
    AE95 1990 - 4A-GZE daily driven wagon...

  20. #120
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    The "egr holes are not for egr. Its for another emission control called A.I.R. or air injection reaction. The idea is that you inject oxygen rich air into exhaust ports which helps the catalytic converter scrub hydrocarbons out of the stream. This feature came starting in 1975 with cars that have an air pump. These vehicles did not have egr at all yet and only had a two-way cat that typically overheated or caught the vehicle carpet on fire if you decelerated dowhill too much.

    They got rid of it by the 80's once three-way cats were introduced. Then they added egr to control Nox.


    Or you could have said "sorry, my kidnap victims keep kicking my elbow, it made me drop my crack pipe and swerve"

    -bangnscrape

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