2JZGE LS400 Throttle body Mod
03-11-12, 10:40 AM
#16
I forget the year, but you basically are looking for the Odb1 throttle body which is regular throttle cable driven, and if you can find one without trac like me that is the best one to get, the trac one has extra items built in and is probably a little longer then the non trac.
I am thinking of doing another 2jzge project later this year, not going to say what it going into but Ill probably get around to slapping this bad boy on.
This is the only place I could find an IACV flange to weld on and its for a 7mgte.
This is perfect cause the 7mgte IACV is very similar to a 2jzgte IACV, uses the same plugs and everything. the kicker is they are inexpensive.
I ordered one and it is a very nice piece and the IACV fits perfectly with the washer and everything.
http://www.beechperformance.com/html..._products.html
I am thinking of doing another 2jzge project later this year, not going to say what it going into but Ill probably get around to slapping this bad boy on.
This is the only place I could find an IACV flange to weld on and its for a 7mgte.
This is perfect cause the 7mgte IACV is very similar to a 2jzgte IACV, uses the same plugs and everything. the kicker is they are inexpensive.
I ordered one and it is a very nice piece and the IACV fits perfectly with the washer and everything.
http://www.beechperformance.com/html..._products.html
Last edited by Ali SC3; 03-11-12 at 10:48 AM.
03-11-12, 10:44 AM
#17
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There's about six unmolested LS400's laying around the yards here and I'm thinking about going to find one (from 1990 - 1995)
So the IAC has to be added on but cruise/throttle cables remain the same? No need to extend, etc.
So the IAC has to be added on but cruise/throttle cables remain the same? No need to extend, etc.
03-11-12, 08:55 PM
#18
I don't think the cruise needs to be extended because it makes that round curve so there is plenty of slack to run it more directly to the TB.
If not I am sure its as simple as getting a longer cruise cable from another car. I will eventually post which one will fit, but I would try the stock one first anyways, It looks like it can to me.
the trans kickdown (if auto) and the throttle cable are oriented and should reach just like stock.
If you look at the bracket on the 2 throttle bodies, they are more or less the same design all the way down to the spring.
Its really like toyota wanted us to do this. I have actually been thinking off taking off my FFIM to try it, I sure miss some of that low end torque from the stock intake manifold.
If not I am sure its as simple as getting a longer cruise cable from another car. I will eventually post which one will fit, but I would try the stock one first anyways, It looks like it can to me.
the trans kickdown (if auto) and the throttle cable are oriented and should reach just like stock.
If you look at the bracket on the 2 throttle bodies, they are more or less the same design all the way down to the spring.
Its really like toyota wanted us to do this. I have actually been thinking off taking off my FFIM to try it, I sure miss some of that low end torque from the stock intake manifold.
Last edited by Ali SC3; 03-11-12 at 09:02 PM.
03-12-12, 02:25 PM
#19
heres a better shot at how well it lines up. If I attack it with a dremel I could probably get it much smoother.
I can't believe how well it lines up because i used an off the shelf holesaw to make that flange, If someone made a real ls400 flange it would be perfect.
I can't believe how well it lines up because i used an off the shelf holesaw to make that flange, If someone made a real ls400 flange it would be perfect.
06-03-13, 03:24 PM
#20
LS400 throttle body mod = Done
I know I need to get some new intercooler piping done I just made the one for the old TB work temporarily.
to get it to fit I had to grind off the extra coolant stuff on the bottom of the throttle body to clear the valve covers. had to grind a little material off the lower TB spring mount that sticks down for no good reason. i'll try and get some pics of that later if anyone is interested.
stock throttle cable used in factory spot and reused stock ge tps (one I got with ls400 tb was bad).
Looks like you can keep cruise its in the right spot but the way it connects is different, almost like it needs a washer or something Ill report back on that when I figure it out.
There is a spot for the auto trans kickdown cable, but since I have a manual I don't know if its pointing the right way but its there.
Yes I ran a IACV I like my idle valve, since this picture I moved the 7m iacv over to the intake side exhaust side was too hot right there, and it goes into the intake in the old egr spot.
One of my solutions for a quick IACV fix that works on most intakes in a pinch:
Take an inexpensive 7m IACV and weld a bung on the bottom of it for a hose barb or -AN fitting, then you can put a line on it and run it to the intake.
For the intake side I removed the EGR from the Y pipe and tapped the center hole with a npt tap, I I think it was 3/8 or 1/4, one of them fits in there just right. then I put a hose barb on it and connected to the 7m iacv.
Since the 7mgte and 2jzge have the same IACV connector, doing the above makes your car idle again.
later I plan on drilling and tapping some other part of the manifold for the iacv, maybe even the upper plenum by the brake booster along with some better intercooler piping. to be continued.
I know I need to get some new intercooler piping done I just made the one for the old TB work temporarily.
to get it to fit I had to grind off the extra coolant stuff on the bottom of the throttle body to clear the valve covers. had to grind a little material off the lower TB spring mount that sticks down for no good reason. i'll try and get some pics of that later if anyone is interested.
stock throttle cable used in factory spot and reused stock ge tps (one I got with ls400 tb was bad).
Looks like you can keep cruise its in the right spot but the way it connects is different, almost like it needs a washer or something Ill report back on that when I figure it out.
There is a spot for the auto trans kickdown cable, but since I have a manual I don't know if its pointing the right way but its there.
Yes I ran a IACV I like my idle valve, since this picture I moved the 7m iacv over to the intake side exhaust side was too hot right there, and it goes into the intake in the old egr spot.
One of my solutions for a quick IACV fix that works on most intakes in a pinch:
Take an inexpensive 7m IACV and weld a bung on the bottom of it for a hose barb or -AN fitting, then you can put a line on it and run it to the intake.
For the intake side I removed the EGR from the Y pipe and tapped the center hole with a npt tap, I I think it was 3/8 or 1/4, one of them fits in there just right. then I put a hose barb on it and connected to the 7m iacv.
Since the 7mgte and 2jzge have the same IACV connector, doing the above makes your car idle again.
later I plan on drilling and tapping some other part of the manifold for the iacv, maybe even the upper plenum by the brake booster along with some better intercooler piping. to be continued.
Last edited by Ali SC3; 06-03-13 at 03:29 PM.
06-21-13, 08:40 AM
#24
having the idle valve separate like I do now is not as perfect as with the stock intake, but the car still starts fine and idles pretty well, still have it on the car.
Thanks, it does clean it up some and If I could get a 90 or something welded to it I could probably take advantage of how much shorter it is. The one nice thing is that to change the plugs taking off this throttle body is easier than the oem one then I have full access to coils.
02-26-21, 10:05 AM
#26
stupid question... I know this thread is old/dead but was wondering what did you do w/ this? I am highly interested in getting it off your hands, provided you want to or if you still have it... lol. I actually like how this looks and the stock intake, on the whole, Provides a sense of originality to the NA platform, IMHO. What can I say? I'm weird like that. 😜
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Ali SC3 (02-26-21)
02-26-21, 10:46 AM
#27
Wow, what a thread bump. I had someone on the forum ask about it years back and I sold it to them as I was not using it anymore. No idea where it is now but it wouldn't be hard to replicate.
They don't make a ls400 throttle body flange so cutting one of those out of aluminum was a little tricky, and I just took it to a local welder who can Tig weld aluminum.
If you decide to try it I probably have some extra pictures I can post of the prep etc..
I will note that the ls400 throttle body does not have an IACV built into it for idle, so that is where alot of the length savings come from.
I just had a remote one hanging out in the pictures, but didn't like the solution that much.
I was planning to actually mount the IACV to the passage on the side of the Y pipe that the egr goes into, which opens just behind the throttle body but never got around to it.
I instead just installed a threaded fitting on the egr passage and ran a hose to it from the IACV, but never got around to cleaning it up and mounting it there instead.
I don't think the JDM model has those passages even drilled out, never had a jdm 2jzge motor to play with but assuming since no egr they didn't bother, but you can always grab a USDM Y pipe and modify that.
They don't make a ls400 throttle body flange so cutting one of those out of aluminum was a little tricky, and I just took it to a local welder who can Tig weld aluminum.
If you decide to try it I probably have some extra pictures I can post of the prep etc..
I will note that the ls400 throttle body does not have an IACV built into it for idle, so that is where alot of the length savings come from.
I just had a remote one hanging out in the pictures, but didn't like the solution that much.
I was planning to actually mount the IACV to the passage on the side of the Y pipe that the egr goes into, which opens just behind the throttle body but never got around to it.
I instead just installed a threaded fitting on the egr passage and ran a hose to it from the IACV, but never got around to cleaning it up and mounting it there instead.
I don't think the JDM model has those passages even drilled out, never had a jdm 2jzge motor to play with but assuming since no egr they didn't bother, but you can always grab a USDM Y pipe and modify that.
Last edited by Ali SC3; 02-26-21 at 10:53 AM.
02-28-21, 06:56 PM
#28
Shoot the pictures, brother. It would be easier to replicate then. I'm interested.
I might just do this at school for my metallics class
So, basically, make the cuts, make the plate, join the LS400 TB accompanied with the LS TB gasket, then the tps (from the GE will work) And finally, the IACV from 7MGTE needs to be joined on the USDM y pipe which has the EGR thingy, join the IACV flange on that side and we are done. Driftmotion sells the flange. Yay.
Thanks for the guidance.
Rishi
I might just do this at school for my metallics class
So, basically, make the cuts, make the plate, join the LS400 TB accompanied with the LS TB gasket, then the tps (from the GE will work) And finally, the IACV from 7MGTE needs to be joined on the USDM y pipe which has the EGR thingy, join the IACV flange on that side and we are done. Driftmotion sells the flange. Yay.
Thanks for the guidance.
Rishi
Last edited by MrGi11; 03-01-21 at 06:24 AM.
03-01-21, 08:47 AM
#30
All I want to do with this mod is to have a 90 right out the TB, come down a lil, and then goes to the IC or whatever orientation that may suit, so it doesn't mess with the turbo exhaust housing and such. Thanks again, sir. I appreciate you.
Rishi.