3.7 manifold on a tl-p
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From: Jacksonville, FL
A lot more power accross the rpm range especially up top. The ecu must be adjusting to the new airflow because the more I drive it the more power it feels like its making. The butterfly's were left open and I don't feel any loss of torque, in fact it feels like I have more. I noticed a difference right away, now I just need to build a new intake. Not sure what you mean by the switch, if your referring to the IMRC I don't have it hooked up
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From: Jacksonville, FL
Yep and along with new manifold being bigger it also is about half the weight and it doesn't get as hit because it is made out of magnesium alloy. I drove the car this morning after washing it and I could leave my hand on the manifold as long as I wanted. On the old manifold I couldn't leave my hand on there after driving down the street and back real quick
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Who made that adapter for you? ( was Kris ) Look very good, now added MDX spacer an you will heard deep tone in our engine. Also I know how much to mill off your MDX spacer to keep your hood shut.
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From: Jacksonville, FL
Sweet after I finish up a few more things I'll have to get your input on that spacer
In the Words of Carroll Shelby:
"HP Sells cars, Torque Wins Races"
Dunno about that but I would use more Torque on the TL specially driving around the city.. The car is fast enough for my Tastes.
"HP Sells cars, Torque Wins Races"
Dunno about that but I would use more Torque on the TL specially driving around the city.. The car is fast enough for my Tastes.
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. The TL isnt lacking in city driving (especially with the manual). If you think you need more then the car isnt fast enough for your tastes.
Not off the top of my head but there was a dyno a few years back where the type-s motor lost a few hp and only gained like 6 lb/ft. Also not sure the clearance with the 09 mani but with the type-s engine i only have between a 1/4 to 1/2 inch at most engine to hood clearance (on the 99-01 body style).
I simply dont rev the engine enough to feel the loss of those Little HP not even full HP.. Where I would like more Torque around 2000 and 4000RPM < Which is my Daily Drive RPM.
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Not off the top of my head but there was a dyno a few years back where the type-s motor lost a few hp and only gained like 6 lb/ft. Also not sure the clearance with the 09 mani but with the type-s engine i only have between a 1/4 to 1/2 inch at most engine to hood clearance (on the 99-01 body style).


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. There is alot more useable power in that range with the manual. But to gain more of both, This is why im building a 3.7. I gain a ton of TQ AND gain HP.
Last edited by fsttyms1; May 16, 2013 at 07:25 AM.
Geez, you guys are making me sick. I'm finally getting around to installing my 03 TL-S manifold, and seeing the 3.7 makes me want to upgrade again! 
Guess I have more work to do, haha.
Looks really good Stephen.
Question: Is your butterfly stuck open because the throttle cable is taut?

Guess I have more work to do, haha.
Looks really good Stephen.
Question: Is your butterfly stuck open because the throttle cable is taut?
Geez, you guys are making me sick. I'm finally getting around to installing my 03 TL-S manifold, and seeing the 3.7 makes me want to upgrade again! 
Guess I have more work to do, haha.
Looks really good Stephen.
Question: Is your butterfly stuck open because the throttle cable is taut?

Guess I have more work to do, haha.
Looks really good Stephen.
Question: Is your butterfly stuck open because the throttle cable is taut?
And what butterfly? The throttle body? It is no different than stock, he is using the stock cable bracket. If it was stuck open then he wouldnt be able to drive.
Thanks for the quick reply. Yeah, Stephen said the "butterfly's were left open." I thought it may have been due to the length of the spacer and the increased distance of the TB from the Manifold causing the cable to be stretched.
He's talking about the IMRC flap thing inside the intake manifold. The stock ECU works only in OPEN or CLOSE position, so the flap won't work correctly (it is made to handle a variable open to close signal).
So instead of leaving it closed and losing HP and gaining low end TQ, it is better to leave it open and gain HP and lose a little low end TQ.
Even with it open the low end TQ is still better than stock, just not as good as it could be.
So instead of leaving it closed and losing HP and gaining low end TQ, it is better to leave it open and gain HP and lose a little low end TQ.
Even with it open the low end TQ is still better than stock, just not as good as it could be.
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Fsttyms1 and karanx7 are correct I left the butterfly valve inside the manifold open because if you leave it closed you lose power up top. I haven't felt any lose in torque and it actually feels like I have a lot more. I was going to do a type s manifold but realized I can gain a lot more with this one plus it's lighter and doesn't get as hot. I should be building a new 4" intake soon and I'll post pics once I get it done
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Chapter Leader (Southeast Region)
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Geez, you guys are making me sick. I'm finally getting around to installing my 03 TL-S manifold, and seeing the 3.7 makes me want to upgrade again! 
Guess I have more work to do, haha.
Looks really good Stephen.
Question: Is your butterfly stuck open because the throttle cable is taut?

Guess I have more work to do, haha.
Looks really good Stephen.
Question: Is your butterfly stuck open because the throttle cable is taut?
Thanks and defidently get the 09 manifold and then get a set of ported runners. It makes a big difference
Right, you will still gain low end TQ over the stock Type-S manifold. But you would gain EVEN more if the flap was working. I'll try to make a module that can control the flap when I do this mod (the flap will still only work Open/Close, but better than nothing). I think it would be impossible to get the flap working with a variable signal.
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Right, you will still gain low end TQ over the stock Type-S manifold. But you would gain EVEN more if the flap was working. I'll try to make a module that can control the flap when I do this mod (the flap will still only work Open/Close, but better than nothing). I think it would be impossible to get the flap working with a variable signal.
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the hood just barely closes with the 4" intake, a local member helped me build it from one of the UBI airaid kits with a k&n 4" filter. He had his computer plugged into the car and when we were driving it was reading that the air coming into the intake was only 10 degrees warmer than the air outside.
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No plans on making it a cold air intake, It rains a lot here and the roads build up water bad every time I drive through a rain storm there is water down in the area where the intake resonator was. I might try to run some tubing from the front bumper up near the bottom of the filter and see if that lowers the temperature of the air coming into the intake
Have you thought about making a custom intake with a velocity stack? I think you should go that route, I'm sure you'll get gains, not to mention the awesome sound it makes. Friend made his own and sounds like he's boosted but he's all bolt ons!
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Thanks I might have to look into that.
Here, already looked it up for you.
It's made by Blox also so you know it's quality, 4" inlet to the TB and a 6" outlet with filter and stack.
http://bit.ly/16vT7cc
It's made by Blox also so you know it's quality, 4" inlet to the TB and a 6" outlet with filter and stack.
http://bit.ly/16vT7cc
Thread Starter
Chapter Leader (Southeast Region)
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From: Jacksonville, FL
Here, already looked it up for you.
It's made by Blox also so you know it's quality, 4" inlet to the TB and a 6" outlet with filter and stack.
http://bit.ly/16vT7cc
It's made by Blox also so you know it's quality, 4" inlet to the TB and a 6" outlet with filter and stack.
http://bit.ly/16vT7cc
Mind sharing where you got that adapter from and where I can get one? i've been wanting to put a 3.7 manifold on forever but I heard the p2r adapters were shitty and didn't seal properly.
Nice intake too. I was thinking about relocating the battery to the trunk and running a 4" intake through the headlight case. Although i'm not sure there would be any gains, plus im pretty sure it won't look good but I won't know til I try. I have an extra headlight layin around, so what the hell
Nice intake too. I was thinking about relocating the battery to the trunk and running a 4" intake through the headlight case. Although i'm not sure there would be any gains, plus im pretty sure it won't look good but I won't know til I try. I have an extra headlight layin around, so what the hell






and adding more intake volume