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1988 Toyota MR2 GT
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3 Posts
Discussion Starter #1
Ive got a 09/1987 MR2 (btw is that considered 87 or 88) and i have the GT version 5-speed 4age AW11, and I want to see if its possible to convert that motor to a 4agze? As in, adding the supercharger and top-mount intercooler from the 4agze (or possibly from another motor since turbo is out of the question due to header/firewall issues). If not, do i just have to settle with a swap? If so, what do i have to change/upgrade in order to do so?
Any kinda of performance upgrade advice would be appreciated.

Thanks,
Eric
 

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1988 Toyota MR2 GT
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3 Posts
Discussion Starter #3
Fort Smith... So far, I think I have the only "running" Mk1 MR2 in Fort Smith. Btw, I will get a pic of mine pretty soon to put in my signature or something. Where are you at in Arkansas?
 

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Midship Captain
1991 MR2 Turbo
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1,643 Posts
Your best bet is to just do a whole motor swap. the 4AGZE's internals are setup differntly I think to handle the boost. Also you will need a few more things then just a Supercharger and IC... like Wiring harness, ECU, possible different lines...etc
 

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20 Posts
Yea, the 4agze blocks are structurally built different. I guess there is some extra ribbing around the cylinders, and around the outer part of the block. A friend of mine builds these motors into formula atlantic motors. He told me about when they tried using 4age blocks, and they blew motors left and right. I would say go with the complete swap, you don't want to put all this effort, work, and money into something like that, then end up toasting it a few months later.
 

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Premium Member
'91 MR2 Turbo
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19,832 Posts
Fort Smith... So far, I think I have the only "running" Mk1 MR2 in Fort Smith. Btw, I will get a pic of mine pretty soon to put in my signature or something. Where are you at in Arkansas?
I'm in White Hall , just north of Pine Bluff.
Yeah, there's not many MR2's of any gen. in Arkansas. Especially the MKI's. ModifiyerMR2 is great with the MKI. He can be a big help to you as some of the others on this forum.
(except for the guy who thinks you can solve all your problems by burping the cooling system,lol)
 

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1988 Toyota MR2 GT
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3 Posts
Discussion Starter #7
Thanks for the tips. Engine swap it is. I've also been considering upgrading to a MK2 just because the stock turbo and the significant HP difference (145 to 200) Though, I am stuck on the masculinity of the MK1. :cool:
Btw, what add-ons can I do to the 4age that can be integrated into the future 4agze? I mean, besides cold-air intake since ive already fabricated my own. I was considering a Accel super-stock coil pack since i can get one from my work for like $43. A VERY trusted mechanic told me that if i did put the super-stock on my MR2 that i would need to slightly increase the gap of the plugs to actually achieve a boost in HP. Sorry, I am a little impatient on upgrading HP. I used to own a 96 Nissan Sentra before the MR2 (which the Nissan had 167k miles and the MR2 has 141k and conviently got traded across for an extra $600 about 2 1/2 weeks ago :D ), so you can understand my enthusiasm towards some extra HP.
 
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