Need Help Installing Ls2 Tb And Intake! Please
Thread Starter
Drifting
Joined: May 2004
Posts: 1,904
Likes: 2
From: London(UK)/Troyes(France)
Need Help Installing Ls2 Tb And Intake! Please
Hi guys,
I have been installing my 408 motor for a few weeks as I have had several issues during the process. The motor is finally in.
However, I have a few new issues
I have the LS2 TB wiring adaptator and the problem is that I connected all the cables of the LS2 TB to those who were previously ran to the LS1 intake. But I have 2 of them remaining and I don't see where to connect them (It seems like they cannot be connected to the LS2 TB). Please let me know.
My second question is concerning the LS2 intake. It doesn't seem to sit well on the motor. The lines that run under the intake seem to be the problem. My mechanic said that they are used for TB cooling. But there is no TB cooling port on the LS2 TB. So can I remove these line and plug the holes so that I can install the LS2 intake and get it to sit properly?
Please help a guy who would really like to start driving his Vette ASAP!
Thanks a lot in advance!
I have been installing my 408 motor for a few weeks as I have had several issues during the process. The motor is finally in.
However, I have a few new issues
I have the LS2 TB wiring adaptator and the problem is that I connected all the cables of the LS2 TB to those who were previously ran to the LS1 intake. But I have 2 of them remaining and I don't see where to connect them (It seems like they cannot be connected to the LS2 TB). Please let me know.My second question is concerning the LS2 intake. It doesn't seem to sit well on the motor. The lines that run under the intake seem to be the problem. My mechanic said that they are used for TB cooling. But there is no TB cooling port on the LS2 TB. So can I remove these line and plug the holes so that I can install the LS2 intake and get it to sit properly?
Please help a guy who would really like to start driving his Vette ASAP!
Thanks a lot in advance!
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
If you don't already have one, I think you need a LS6 valley cover. The rear crossover tubes need plugs, and you basically scrap all the tubes that run under the manifold I think you can use the front crossover, which should be metal, and your new valley cover will have the crackcase vent in the right spot. If you continue to have wiring problems, I used a plug 'n' play LS2 wiring adapter that I bought from LAPD. Sure easier than splicing.
Last edited by zeevette; Nov 21, 2007 at 05:03 PM.
Thread Starter
Drifting
Joined: May 2004
Posts: 1,904
Likes: 2
From: London(UK)/Troyes(France)
Thanks Steve,
I really appreciate your answer.
So I can't use LS1 lines that are on the car now?
I mean I am from Europe and getting these parts take a lot of time. I wish that tuners would take the time to explain exctly what is needed especially when their customers come from abroad. This specific tuner did not answer my question well.
I asked him if the LS2 intake/TB, wiring adaptator and injectors o rings were enough, and he said yes. I then found out that I needed LS2 fuel rails (fortunatly I got the LS1 to fit) and now I don't know what to do with these coolant lines (the ones that run under the intake. Do I have to scrub the intake a little to make it sit lower or something? I need the car ASAP and if I order LS6 coolant lines it's gonna take 1+ week.
I really appreciate your answer.
So I can't use LS1 lines that are on the car now?
I mean I am from Europe and getting these parts take a lot of time. I wish that tuners would take the time to explain exctly what is needed especially when their customers come from abroad. This specific tuner did not answer my question well.
I asked him if the LS2 intake/TB, wiring adaptator and injectors o rings were enough, and he said yes. I then found out that I needed LS2 fuel rails (fortunatly I got the LS1 to fit) and now I don't know what to do with these coolant lines (the ones that run under the intake. Do I have to scrub the intake a little to make it sit lower or something? I need the car ASAP and if I order LS6 coolant lines it's gonna take 1+ week.
Drifting
Joined: Jun 2006
Posts: 1,702
Likes: 1
Hi guys,
I have been installing my 408 motor for a few weeks as I have had several issues during the process. The motor is finally in.
However, I have a few new issues I have the LS2 TB wiring adaptator and the problem is that I connected all the cables of the LS2 TB to those who were previously ran to the LS1 intake. But I have 2 of them remaining and I don't see where to connect them (It seems like they cannot be connected to the LS2 TB). Please let me know.
My second question is concerning the LS2 intake. It doesn't seem to sit well on the motor. The lines that run under the intake seem to be the problem. My mechanic said that they are used for TB cooling. But there is no TB cooling port on the LS2 TB. So can I remove these line and plug the holes so that I can install the LS2 intake and get it to sit properly?
Please help a guy who would really like to start driving his Vette ASAP!
Thanks a lot in advance!
I have been installing my 408 motor for a few weeks as I have had several issues during the process. The motor is finally in.
However, I have a few new issues
I have the LS2 TB wiring adaptator and the problem is that I connected all the cables of the LS2 TB to those who were previously ran to the LS1 intake. But I have 2 of them remaining and I don't see where to connect them (It seems like they cannot be connected to the LS2 TB). Please let me know.My second question is concerning the LS2 intake. It doesn't seem to sit well on the motor. The lines that run under the intake seem to be the problem. My mechanic said that they are used for TB cooling. But there is no TB cooling port on the LS2 TB. So can I remove these line and plug the holes so that I can install the LS2 intake and get it to sit properly?
Please help a guy who would really like to start driving his Vette ASAP!
Thanks a lot in advance!
yesnod:
Thread Starter
Drifting
Joined: May 2004
Posts: 1,904
Likes: 2
From: London(UK)/Troyes(France)
I don't think you realize that the LS2 intake and TB are sub-performers. The dyno numbers on the 90mm LS2 intake and TB fall short of the LS6 04 78mm intake and TB. If at all possible you should go with the 04 LS6 intake or the FAST 90mm intake - no one uses the LS2 intake as a performance upgrade due to it's poor engineering (lack of flow).
yesnod:
yesnod:
Other than that, RoadRebel aka Dr Phil has been using the LS2 intake and TB (both ported) on FI cars with big cube engines and they work really good. Him as well as ECS and A&A told me it would be a good choice to go with my 408ci and soon F1R blower.
Other than that, what I have on the car right now is a LS1 intake, there is no way to get worse
And anything will be more efficient on a 408 blown motor than a LS1 78mm intake
Drifting
Joined: Jun 2006
Posts: 1,702
Likes: 1
Anyway I paid for it 1 year ago, I live in Europe and I have no one to sell it to and ordering other parts now, for a few HP would cost me so much money you can't even realize. Shipping, taxes and customs + the fact that I can't sell what I have make it impossible.
Other than that, RoadRebel aka Dr Phil has been using the LS2 intake and TB (both ported) on FI cars with big cube engines and they work really good. Him as well as ECS and A&A told me it would be a good choice to go with my 408ci and soon F1R blower.
Other than that, what I have on the car right now is a LS1 intake, there is no way to get worse And anything will be more efficient on a 408 blown motor than a LS1 78mm intake
Other than that, RoadRebel aka Dr Phil has been using the LS2 intake and TB (both ported) on FI cars with big cube engines and they work really good. Him as well as ECS and A&A told me it would be a good choice to go with my 408ci and soon F1R blower.
Other than that, what I have on the car right now is a LS1 intake, there is no way to get worse
And anything will be more efficient on a 408 blown motor than a LS1 78mm intake
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Thread Starter
Drifting
Joined: May 2004
Posts: 1,904
Likes: 2
From: London(UK)/Troyes(France)
The stock LS2 intake is not a upgrade over the stock LS1 intake, they flow at comparable numbers. GMPP as listed on this form is selling the LS2 intake for half the cost of the 04 LS6 intake and just why do you think that is....it could have to do with the sad numbers that the LS2 intake produces don't you think? I understad your delima with being in Europe and not having ready availability of LSX preformance parts. It's just sad that the people that you bought your intake from didn't give you better advice....they were probably attempting to deplete their inventory. Best of luck with your 408....nothing like good old American iron.
I got the intake and TB from ECS (both ported)
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
and they will perform fine....you just need to switch out a couple of parts. Call ECS. They'll know exactly which parts you'll need for your application. Don't know which heads you went with, but it shouldn't matter as far as fitment goes. The back two water crossovers on LS1 are not needed on your new application. You need two LS6 plugs for them. I'm pretty sure you also need the valley cover to work with a LS2 intake/PCV system, but ECS will have all the answers.
Thread Starter
Drifting
Joined: May 2004
Posts: 1,904
Likes: 2
From: London(UK)/Troyes(France)
and they will perform fine....you just need to switch out a couple of parts. Call ECS. They'll know exactly which parts you'll need for your application. Don't know which heads you went with, but it shouldn't matter as far as fitment goes. The back two water crossovers on LS1 are not needed on your new application. You need two LS6 plugs for them. I'm pretty sure you also need the valley cover to work with a LS2 intake/PCV system, but ECS will have all the answers.
Thanks for your reply. I have the adaptator you're talking about. The problem is that I connected it to the TB, and I needed to connect the wires to the car. And here came the problem. The adapatator has has less wires than the LS1 used to. I have 2 wires remaining on the car (all of the wires from the adaptator have been used but there are two left on the car that I can't connect anywhere).
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
David
If you look in this picture, you cab see the crossover block off at the rear of the drivers head:
You could probably cut the metal lines close to the fitting and have someone braze the metal line closed!
Can you take a picture of the wires /connectors that your having issues with and post them?
Bill
If you look in this picture, you cab see the crossover block off at the rear of the drivers head:
You could probably cut the metal lines close to the fitting and have someone braze the metal line closed!
Can you take a picture of the wires /connectors that your having issues with and post them?
Bill
Drifting
Joined: Jul 2006
Posts: 1,700
Likes: 60
From: Springfield IL
or you can connect the rear lines together with a rubber coolant line, and do the same with the front. Costs 5-6 dollars and is more effective then the OEM lines..... hot pockets can build up in the rear, and the cross-over lets them escape
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
David
If you look in this picture, you cab see the crossover block off at the rear of the drivers head:
You could probably cut the metal lines close to the fitting and have someone braze the metal line closed!
Can you take a picture of the wires /connectors that your having issues with and post them?
Bill
If you look in this picture, you cab see the crossover block off at the rear of the drivers head:
You could probably cut the metal lines close to the fitting and have someone braze the metal line closed!
Can you take a picture of the wires /connectors that your having issues with and post them?
Bill
Thread Starter
Drifting
Joined: May 2004
Posts: 1,904
Likes: 2
From: London(UK)/Troyes(France)
Hi guys,
thanks all for your help! I got everything sorted out as I called Andy several days ago and then I stayed out of this thread for a few days! Anyway thanks a lot for your help. After succeeding with the intake and TB I had to remove it and install the LS1 stuff back as the car wouldn't idle properly with the new motor and sice I had doubts about the wires (I was wrong as the wires I was talking about are useless), I decided to reinstall the stock intake/TB combo. I will be starting the car again today, we'll see what happens.
Bill, you got a PM!
thanks all for your help! I got everything sorted out as I called Andy several days ago and then I stayed out of this thread for a few days! Anyway thanks a lot for your help. After succeeding with the intake and TB I had to remove it and install the LS1 stuff back as the car wouldn't idle properly with the new motor and sice I had doubts about the wires (I was wrong as the wires I was talking about are useless), I decided to reinstall the stock intake/TB combo. I will be starting the car again today, we'll see what happens.
Bill, you got a PM!