TT coil fitment on a na-t (please advise)
10-28-09, 01:41 PM
#1
TT coil fitment on a na-t (please advise)
I bought a set of TT coils and a TT igniter for my na-t because I was getting tired of the stock distributor. I have all the wiring figured out and everything, Im running an AEM EMS so no worries about engine management.
My question is that in my reading adventures, I found a couple people who stated several years back that TT coils will not fit under the intake manifold of a stock 2jz-ge. as in the part that wraps over, there is not enough clearance to fit the coils underneath it. Is there any truth to this statement?? can anyone confirm this first hand??
I would just test it myself but its like a 2 hour process to pull the throttle body off and I don't have a garage available to me at the moment. It seems to me like it should only be an issue with maybe 2-3 coils. I honestly didn't think they look tall enough to not fit under there, but I figured I would ask. better safe than sorry.
Pls don't tell me to just try it, its obvious I will get around to doing that.
I am looking for people who know information as to why it is yes or no, and what exactly is the issue. Thanks.
I added some pics to help show what and where im talking about.
My question is that in my reading adventures, I found a couple people who stated several years back that TT coils will not fit under the intake manifold of a stock 2jz-ge. as in the part that wraps over, there is not enough clearance to fit the coils underneath it. Is there any truth to this statement?? can anyone confirm this first hand??
I would just test it myself but its like a 2 hour process to pull the throttle body off and I don't have a garage available to me at the moment. It seems to me like it should only be an issue with maybe 2-3 coils. I honestly didn't think they look tall enough to not fit under there, but I figured I would ask. better safe than sorry.
Pls don't tell me to just try it, its obvious I will get around to doing that.
I am looking for people who know information as to why it is yes or no, and what exactly is the issue. Thanks.
I added some pics to help show what and where im talking about.
10-28-09, 01:50 PM
#2
looking up the same info onthis but it seams your gonna have to dump the intake mani for a side mount intake mani...
http://my.is/forums/f114/installing-...-packs-399787/
http://my.is/forums/f114/installing-...-packs-399787/
10-28-09, 03:38 PM
#6
OK, I found this on the IS forum. It seems this particular member is very knowledgeable.
can be found here: http://my.is/forums/f114/supra-coils-368366/index5.html post #64
To those who are fitting the TT coils into their IS, you will notice that you have to trim the TT coil pack boots to get them to sit lower. Make sure the spring inside the coil pack is still there (and not missing), and also make sure the boots are properly snugged with no tears, gaps, etc.. the boot has to cover the entire spark plug just like OEM fitment to prevent spark from arcing. Besides that, check for the wiring polarity, and also make sure the coil pack connectors and pigtail are in good condition. The OEM Toyota coil pack connectors are really fragile and like to crack and break apart after several years of use. Do a resistance wire check between your coil pack negative wire by probing the pin at the coil connector and at the ignitor harness connector.
i noticed the spring is way up inside the boot. i dont think a little rubber missing is going to hurt anything if it works... or will it. either way boots are replaceable.
can be found here: http://my.is/forums/f114/supra-coils-368366/index5.html post #64
To those who are fitting the TT coils into their IS, you will notice that you have to trim the TT coil pack boots to get them to sit lower. Make sure the spring inside the coil pack is still there (and not missing), and also make sure the boots are properly snugged with no tears, gaps, etc.. the boot has to cover the entire spark plug just like OEM fitment to prevent spark from arcing. Besides that, check for the wiring polarity, and also make sure the coil pack connectors and pigtail are in good condition. The OEM Toyota coil pack connectors are really fragile and like to crack and break apart after several years of use. Do a resistance wire check between your coil pack negative wire by probing the pin at the coil connector and at the ignitor harness connector.
i noticed the spring is way up inside the boot. i dont think a little rubber missing is going to hurt anything if it works... or will it. either way boots are replaceable.
Trending Topics
10-29-09, 12:18 PM
#9
FWIW, everyone using TT coils usually installs an HKS DLI to keep the ignition from breaking up above about 20lbs of boost.
In lieu of TT coils and a CDI, I suggest going to VVt-i coil packs. You can run VVt-i coils with the AEM, they'll fit under the "Y" pipe without modifications, and you'll never need a DLI or CDI. I run 33+lbs of boost on nothing but VVt-i coils, and they worked flawlessly in stock form (including the plug wires). Numbers are in my sig.
-scott
In lieu of TT coils and a CDI, I suggest going to VVt-i coil packs. You can run VVt-i coils with the AEM, they'll fit under the "Y" pipe without modifications, and you'll never need a DLI or CDI. I run 33+lbs of boost on nothing but VVt-i coils, and they worked flawlessly in stock form (including the plug wires). Numbers are in my sig.
-scott
10-29-09, 12:26 PM
#10
FWIW, everyone using TT coils usually installs an HKS DLI to keep the ignition from breaking up above about 20lbs of boost.
In lieu of TT coils and a CDI, I suggest going to VVt-i coil packs. You can run VVt-i coils with the AEM, they'll fit under the "Y" pipe without modifications, and you'll never need a DLI or CDI. I run 33+lbs of boost on nothing but VVt-i coils, and they worked flawlessly in stock form (including the plug wires). Numbers are in my sig.
-scott
In lieu of TT coils and a CDI, I suggest going to VVt-i coil packs. You can run VVt-i coils with the AEM, they'll fit under the "Y" pipe without modifications, and you'll never need a DLI or CDI. I run 33+lbs of boost on nothing but VVt-i coils, and they worked flawlessly in stock form (including the plug wires). Numbers are in my sig.
-scott
10-29-09, 12:47 PM
#11
Yep... I run a built GE long block with Wiseco pistons, Eagle rods, HKS 272 cams, DaveH intake, T74GTS, etc.
Here are some pics back in May of '08: https://www.clublexus.com/forums/3570999-post18.html
-scott
Here are some pics back in May of '08: https://www.clublexus.com/forums/3570999-post18.html
-scott
Last edited by motorheaddown; 10-30-09 at 07:34 AM.
10-30-09, 07:33 AM
#13
10-30-09, 07:59 AM
#15
You might ask DaveH to shorten the plenum width. For some reason, the shock towers are closer on the SC than the Supra, and I can't get the intake off without pulling the motor. That was an unfortunate circumstance I learned after the fact. I also suggest routing the charge pipe through the battery tray. Then, you don't have to bend A/C lines out of the way.-scott