2nd gen or 3rd gen?? - MR2 Owners Club Message Board
 2Likes
Reply
 
LinkBack Thread Tools
post #1 of 22 (permalink) Old September 19th, 2019, 11:11 Thread Starter
Registered User
 
Join Date: Sep 2019
Posts: 8
OldTrader Rating: (0)
2nd gen or 3rd gen??

Hi all I just bought a "3rd" gen 3sgte it was too good of a deal to pass up on, looking back I should have done a little bit more research, but the guy I bought it from told me it was a gen 3 I believe it's a gen 2 bc it came with the ct26 turbo. The turbo could have been replaced so is there anyway you can tell if it's a gen 2 or 3 based off of anything you can see on the block or head and the differences between the two, thanks!
Dwop.mr2 is offline  
Sponsored Links
Advertisement
 
post #2 of 22 (permalink) Old September 19th, 2019, 11:23
Registered User
 
Join Date: Mar 2008
Location: Georgia
Posts: 5,641
OldTrader Rating: (25)
Yes there are many visual differences just post a picture of the engine and we can help you. There could be a possibility that the original ct20b turbo was damaged and then replaced with an upgraded ct26 or just a regular ct26.
J.harris is offline  
post #3 of 22 (permalink) Old September 19th, 2019, 11:39 Thread Starter
Registered User
 
Join Date: Sep 2019
Posts: 8
OldTrader Rating: (0)
I'm not at home right now so these are the pictures I've got
Attached Images
File Type: jpg Screenshot_20190919-103341_KSL Classifieds_1568911129063.jpg (437.4 KB, 28 views)
File Type: jpg Screenshot_20190919-103410_KSL Classifieds_1568911138787.jpg (546.5 KB, 26 views)
File Type: jpg Screenshot_20190919-103400_KSL Classifieds_1568911146898.jpg (565.7 KB, 24 views)
Dwop.mr2 is offline  
Sponsored Links
Advertisement
 
post #4 of 22 (permalink) Old September 19th, 2019, 13:32
Registered User
 
Join Date: Mar 2008
Location: Georgia
Posts: 5,641
OldTrader Rating: (25)
Yep that's a USDM gen 2
J.harris is offline  
post #5 of 22 (permalink) Old September 19th, 2019, 13:46 Thread Starter
Registered User
 
Join Date: Sep 2019
Posts: 8
OldTrader Rating: (0)
Thanks! Now do you know if I could fit a 3rd gen intake on it? there's one for like 50 bucks in my local area or do I have to use strictly 2nd gen parts?
Dwop.mr2 is offline  
post #6 of 22 (permalink) Old September 19th, 2019, 14:29
Registered User
 
Join Date: Mar 2008
Location: Georgia
Posts: 5,641
OldTrader Rating: (25)
Post a picture of the intake

If you are going to use the stock gen2 ECU you will have to use the air flow meter which affects what intakes you can use. Gen3 ecus are speed density so you have more options on the intake.

Look at the top left of this picture, the air flow meter is required for a gen2 engine unless you convert to standalone or gen3 electronics.

J.harris is offline  
post #7 of 22 (permalink) Old September 19th, 2019, 14:38 Thread Starter
Registered User
 
Join Date: Sep 2019
Posts: 8
OldTrader Rating: (0)
Ok I'll just go with the 2nd gen intake and electronics I'm not going for any crazy build just around 300hp fun street car hopefully the intake and electronics wont limit me to below that (correct me if I'm wrong) Do I need to keep all of the emissions junk like the charcoal canister and all the rats nest of vacuum lines? Basically what do I need to keep and what can I get rid of
Dwop.mr2 is offline  
post #8 of 22 (permalink) Old September 19th, 2019, 15:34
Registered User
 
Join Date: Mar 2008
Location: Georgia
Posts: 5,641
OldTrader Rating: (25)
Gen2 ecu is supposed to have a limit of around 275whp, gen3 around 330whp.

Charcoal canister, EGR, and both catalytic converters can go, the ECU doesn't care that they aren't there.
J.harris is offline  
post #9 of 22 (permalink) Old September 19th, 2019, 15:38
Registered User
 
Join Date: Jun 2014
Location: East Bay
Posts: 667
OldTrader Rating: (0)
Quote:
Originally Posted by Dwop.mr2 View Post
Ok I'll just go with the 2nd gen intake and electronics I'm not going for any crazy build just around 300hp fun street car hopefully the intake and electronics wont limit me to below that (correct me if I'm wrong) Do I need to keep all of the emissions junk like the charcoal canister and all the rats nest of vacuum lines? Basically what do I need to keep and what can I get rid of
There is 275whp limit for gen2 with stock fuel/intake/turbo/ecu. You should target 250whp with boost controller, intake, downpipe and exhaust.
What state are you in?
2ZZXRS is offline  
post #10 of 22 (permalink) Old September 19th, 2019, 15:44
Registered User
 
Join Date: Oct 2012
Location: Wellington, New Zealand
Posts: 1,201
OldTrader Rating: (0)
Quote:
Originally Posted by Dwop.mr2 View Post
Thanks! Now do you know if I could fit a 3rd gen intake on it? there's one for like 50 bucks in my local area or do I have to use strictly 2nd gen parts?
GEN3 manifolds do not fit GEN2. Port and bolt patterns are different. A CT20b turbo will bolt onto a GEN2 manifold though.
GDII is offline  
post #11 of 22 (permalink) Old September 19th, 2019, 15:54 Thread Starter
Registered User
 
Join Date: Sep 2019
Posts: 8
OldTrader Rating: (0)
Awesome good news for me, now is it worth upgrading to gen 3 electronics?
Dwop.mr2 is offline  
post #12 of 22 (permalink) Old September 19th, 2019, 15:55 Thread Starter
Registered User
 
Join Date: Sep 2019
Posts: 8
OldTrader Rating: (0)
I am in Utah
Dwop.mr2 is offline  
post #13 of 22 (permalink) Old September 19th, 2019, 21:59
Registered User
 
Join Date: Mar 2008
Location: Georgia
Posts: 5,641
OldTrader Rating: (25)
Quote:
Originally Posted by Dwop.mr2 View Post
Awesome good news for me, now is it worth upgrading to gen 3 electronics?
If you have someone who can tune a 3SGTE I would get a standalone, the gen3 conversion isn't easy with the most difficult part being making an adapter harness from the gen2 pinout to gen3.

Gen3 electronics are cool because you get to remove the AFM, the engine is smoother, and larger injectors 540cc vs gen2 at 440cc.

Another hurdle is the ECUs at this point will have leaking capacitors, they need to be changed if they haven't already caused damage. If you aren't good with soldering find someone who is, it's easy to lift or damage the solder pads.

I do know these ecus have a speed cut, it's pretty low 180kph or 112mph. I don't know if it is still in effect on a conversion so you might have to look into defeating that if you race your car.

With that all being said I love having my gen2 converted.
J.harris is offline  
post #14 of 22 (permalink) Old September 19th, 2019, 22:06 Thread Starter
Registered User
 
Join Date: Sep 2019
Posts: 8
OldTrader Rating: (0)
Ok sounds good really appreciate the help!
Dwop.mr2 is offline  
post #15 of 22 (permalink) Old September 22nd, 2019, 15:52
Registered User
 
Join Date: Oct 2012
Location: Wellington, New Zealand
Posts: 1,201
OldTrader Rating: (0)
Quote:
Originally Posted by J.harris View Post
If you have someone who can tune a 3SGTE I would get a standalone, the gen3 conversion isn't easy with the most difficult part being making an adapter harness from the gen2 pinout to gen3.

Gen3 electronics are cool because you get to remove the AFM, the engine is smoother, and larger injectors 540cc vs gen2 at 440cc.

Another hurdle is the ECUs at this point will have leaking capacitors, they need to be changed if they haven't already caused damage. If you aren't good with soldering find someone who is, it's easy to lift or damage the solder pads.

I do know these ecus have a speed cut, it's pretty low 180kph or 112mph. I don't know if it is still in effect on a conversion so you might have to look into defeating that if you race your car.

With that all being said I love having my gen2 converted.
Are the GEN2 ECUs doing this with capacitors? It seems to be a big problem with the GEN3 3SGTE and the 3SGE. We have heaps of JDM GEN2 3SGTE and 3SGE MR2 in New Zealand but they don't seem to suffer the same problem. The GEN3s do though.

The speed cut at 180kph would still apply. You can put a signal divider inline to trick the ECU to thinking it's only seeing half the speed so it would only cut out when you hit 360kph... That would be something special.
GDII is offline  
post #16 of 22 (permalink) Old September 26th, 2019, 18:27
Registered User
 
Join Date: Jul 2016
Posts: 849
OldTrader Rating: (0)
Unless youíre planning on building the gen2 with better am parts for better performance better to go gen3 if you can get it to pass emissions testing.
Rather than waste time hassling on gathering all the required gen3 3SGTE electronics to convert a gen2 itís easier cheaper to just get a low mileage complete gen3 from an importer.
No emissions junk, bigger fuel injectors, no wonky AFM, no titsvis, less freakin rats nest vacuum lines spaghetti, better oiling system, oil filter located at bottom accessible away from hot azz turbo, bigger throttle body, better cams, better turbo
GDII likes this.
Abesdub is online now  
post #17 of 22 (permalink) Old September 27th, 2019, 07:13
Registered User
 
Join Date: Mar 2008
Location: Georgia
Posts: 5,641
OldTrader Rating: (25)
Quote:
Originally Posted by GDII View Post
Are the GEN2 ECUs doing this with capacitors? It seems to be a big problem with the GEN3 3SGTE and the 3SGE. We have heaps of JDM GEN2 3SGTE and 3SGE MR2 in New Zealand but they don't seem to suffer the same problem. The GEN3s do though.
Not that I've seen or heard of, I've had a gen3 mr2 ecu and currently a st205 ecu, both had leaking capacitors with some minor damage to the traces.

If you're going to swap engines I would skip the gen3 and just go gen4.
J.harris is offline  
post #18 of 22 (permalink) Old September 27th, 2019, 15:21
Registered User
 
Join Date: Jul 2016
Posts: 849
OldTrader Rating: (0)
I’ve seen run into many posts here within USA owners and on fb where people with mostly gen2 3SGTE having same poor running/idling symptoms and reported back with leaking blown capacitors in ecu.
Think about all the many cases where so many owners have had to replace the capacitors in the tachometer as well, you know when the taco needle is not reading accurate

Last edited by Abesdub; September 27th, 2019 at 16:21.
Abesdub is online now  
post #19 of 22 (permalink) Old September 27th, 2019, 16:00
Registered User
 
Join Date: Mar 2008
Location: Georgia
Posts: 5,641
OldTrader Rating: (25)
Quote:
Originally Posted by Abesdub View Post
My conclusion is that when the ground wires and some higher power positive side wire contacts as well throughout car become corroded overtime cause high resistance causing inconsistent current flow fluctuations thru caps which take all the beating electronically similar to function of a regular fuse.
Think about all the many cases where so many owners have had to replace the capacitors in the tachometer as well, you know when the taco needle is not accurate
Electronlytic capacitors have a life span, it's not abuse or improper grounds that kill them. Either the electrolyte inside the capacitor dries up or leaks out.

On my 91t I've had to replace the caps in not only the gen3 ecus but the tach, cruise control module, and I replaced them in the a/c amplifier for precaution.
Abesdub likes this.
J.harris is offline  
post #20 of 22 (permalink) Old September 27th, 2019, 17:54
Registered User
 
Join Date: Mar 2004
Location: Welcome, NC
Age: 37
Posts: 5,153
OldTrader Rating: (19)
Quote:
Originally Posted by J.harris View Post
Electronlytic capacitors have a life span, it's not abuse or improper grounds that kill them. Either the electrolyte inside the capacitor dries up or leaks out.

On my 91t I've had to replace the caps in not only the gen3 ecus but the tach, cruise control module, and I replaced them in the a/c amplifier for precaution.
Do you mind elaborating on the CC module - the car I just got has sketchy CC, it works some times, at times it doesnt. Wondering if this is part of the issue
xxxboosted2xxx is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the MR2 Owners Club Message Board forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: (2 members)
Abesdub, L0s7
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome