 6 speed tranny 7afe, I know this discussed before sorry... |
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 Oct 26, 2003 - 3:39 PM
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Enthusiast  Joined Jun 2, '03 From Annandale VA Currently Offline Reputation: 0 (0%)  |
Leme preface this with i know this was discussed again less then a week ago but ive been looking for a half hour with search and all and still cant find what I wanted. Someone mentioned an actualy 6 speed trany that reduced 1/4 mile times 1 second. What was that? Im just looking into this for potential/curiousitys sake. To truly utilize the potential of 6 speed tranny wouldnt one need a new ecu as well? I was thinking for all thoes getting turbos for their 7AFE it would really be a nice feature! *trying to weight potential of swap vs turbo still
 * Thanks guys
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Oct 26, 2003 - 4:44 PM
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 Administrator Joined Aug 23, '02 From Seattle, WA Currently Offline Reputation: 14 (100%) |
I'm not sure that you'd need a new ECU, but you'd need the six speed tranny from a AE111 Sprinter Trueno, and the shifter lever assembly from it, and you'd probably need some other stuff.
I really doubt that you'd be one second faster in the quarter mile with this tranny. 
-------------------- New Toyota project coming soon...
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Oct 26, 2003 - 4:57 PM
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 Enthusiast Joined Aug 30, '02 From Anaheim, CA Currently Offline Reputation: 0 (0%) |
there might be ecu problems, but nothing major, just a CEL when in 6th gear since the ecu wont know whats happening. thats what im guessing anyways, im not too sure on it but since its a manual tranny the ecu has very little role in shifting other than the speed limiter(signal from tranny) -------------------- 1994 Celica GT4 WRC Edition
@gt4.wrc on Instagram |
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Oct 26, 2003 - 4:58 PM
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Administrator Joined Aug 23, '02 From Seattle, WA Currently Offline Reputation: 14 (100%) |
All of Toyota's twenty valve 4A-GE engines are a bit over-rated though, and they produce high output only at high RPM. Due to the 1.6 liter displacement, there really is not much low end torque from what I've heard, especially on a Celica that's heavier than a AE101 or AE111 Corolla. A turboed 7A-FE on the other hand, will have much more torque down low, if done right.
-------------------- New Toyota project coming soon...
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Oct 26, 2003 - 6:23 PM
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 Enthusiast Joined Dec 26, '02 From Alabama Currently Offline Reputation: 2 (100%) |
Actually.... you could use the 7a bottom end and the 4a head with the 4a ECU and get a nice engine. (only if the 20v head will bolt onto the 7a.) I know this works with old school 4age heads, but the 20v.... hey coomer, when you get your 7a back, try to bolt the other 20v head onto it!:)
Jon |
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Oct 27, 2003 - 2:07 AM
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 Enthusiast Joined Apr 8, '03 From NorCal Currently Offline Reputation: 0 (0%) |
If you do that with a 20V, you'll also need to use the 20V pistons, get custom rods, bearings, ECU, wiring, etc. No one that I know of have tried even a 4AGE 16V head on a 7A... so... dream on...shall we say... however...it would be neat... Oh yeah... even with a 6 speed trannie, the 7A doesn't really benifit from having it, mainly because the shorter gearing doesn't do much in terms of the power delivery patterns of the 7A (mostly low-end)... in this case, if you can accelerate faster, it'll be in the 5K+ department...where the 7A tops out... beyond that...it drops off... but who knows... This post has been edited by Kwanza: Oct 27, 2003 - 2:09 AM |
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Oct 27, 2003 - 2:13 AM
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Administrator Joined Aug 23, '02 From Seattle, WA Currently Offline Reputation: 14 (100%) |
-------------------- New Toyota project coming soon...
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Oct 27, 2003 - 5:07 PM
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Enthusiast Joined Dec 26, '02 From Alabama Currently Offline Reputation: 2 (100%) |
 yea, I wonder if the 20V bolts right up to the 7a LIKE the 16v does. Jon |
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Oct 27, 2003 - 7:17 PM
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Enthusiast Joined Jun 2, '03 From Annandale VA Currently Offline Reputation: 0 (0%) |
I dono, but after reading that article it does make you wonder what kinda power you could push outa it... that and why would you do that when you could just drop in the 4age
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Oct 27, 2003 - 8:57 PM
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Enthusiast Joined Apr 8, '03 From NorCal Currently Offline Reputation: 0 (0%) |
Interesting... FallenHero... don't bother rolling your eyes bro... the 20V probably does bolt up, but you'll need to use the 20V pistons and have custom rods made for them... |
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Oct 27, 2003 - 10:51 PM
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Enthusiast Joined Dec 26, '02 From Alabama Currently Offline Reputation: 2 (100%) |
no you wont... the point here is to get the 7a's 1.8l displacement, and the 4a's performance head. Why would you change out bottom end parts? The only reason I would change the pistons is if I wanted big boost, then I would go for some forged ones, other than that, leave well enough alone. If the 20v head does bolt up, the trouble would be the wiring. you would not be able to use the 7a's ECU, so the 20v unit would have to be used.
Also, in charlies words, there is no need to fool with this. I think it's interesting, but not easily done. Jon |
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Oct 27, 2003 - 10:57 PM
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Enthusiast Joined Aug 30, '02 From Anaheim, CA Currently Offline Reputation: 0 (0%) |
pistons will have to be changed the valves will hit the stock 7a pistons. the rods will probably need to be changed as well, but keeping the crank will keep the extra .2L of displacement -------------------- 1994 Celica GT4 WRC Edition
@gt4.wrc on Instagram |
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Oct 27, 2003 - 11:10 PM
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Enthusiast Joined Dec 26, '02 From Alabama Currently Offline Reputation: 2 (100%) |
Why will they need to be changed? I don't see why the valves would hit the pistons, but I will go look.
EDIT: Go here http://www.club4ag.com/faq%20and%20tech_pa...%20and%207A.htm "Conversion to the 7A-GE hybrid need not be as complicated as the 5A-GE. This is because the block internals need not be torn apart and modified." You may be right, but they didn't mention anything about custom rods and such. This post has been edited by FallenHero: Oct 27, 2003 - 11:14 PM |
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Oct 28, 2003 - 2:22 PM
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Enthusiast Joined Apr 8, '03 From NorCal Currently Offline Reputation: 0 (0%) |
That page refers to a 16 valve 4A head... the 20V head will require changing the pistons, so therefore, changing the rods... There are only 4 grooves on the 7A piston... even though it's fairly unlikely that the valve could hit the piston, it'll cause bad compression and will run pretty crappily... If you simply look at and compare the top of the 2 piston heads, 16V to 20V you'll understand...hopefully. This post has been edited by Kwanza: Oct 28, 2003 - 2:24 PM |
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Oct 28, 2003 - 11:09 PM
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Enthusiast Joined Dec 26, '02 From Alabama Currently Offline Reputation: 2 (100%) |
 don't put a 6spd on a 7afe, or if you do, give one of us the left over engine.
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