6.1 intake manifold on a 5.7
Banned
Joined: Nov 2005
Posts: 3,739
Likes: 8
From: MD
You can machine the intake all you want it still will not line up with the 5.7 heads. The intake ports are bigger than the ports on the heads,so how does taking material off the intake by machine solve that problem? I don't care what any performance shop says,it wont add any performance gains. All you will gain is a different looking intake and that's it. If you believe that I will sell you a Powerwire that will add 50 HP and a tornado that will add 25 HP and a throttle body spacer That will add infinite amount of HP. Do a bit of research on the subject and don't believe everything you read on the internet. Hot Rod magazine did an article with different intakes on the 5.7 Hemi and the 6.1 intake made lower numbers. If the 6.1 liter was such a bad *** motor why didn't Dodge use it in any of the Rams???
Last edited by HemiLonestar; May 29, 2009 at 09:15 AM.
Thread Starter
|
Captain
Joined: Jun 2006
Posts: 518
Likes: 0
From: Regina, SK
cool well just was curious about it, really you would have to get your stock heads machined or get the manifold welded and machined. But ill drop the idea, just seen it and wondered about it.
Banned
Joined: Nov 2005
Posts: 3,739
Likes: 8
From: MD
Because too much power is just enough...
Yes. The stock intake manifold on a CAR 5.7 is very similiar to the 6.1, just plastic and smaller ports. You would still have to do the whole conversion of the front of the engine process to use this manifold. The other thing is, the truck hemis through 08 are rated at 345hp, 370tq. The car hemis are rated at 340hp, but 375tq (390tq if you got a Daytona or any of the Chargers with the upgraded exhaust). That's actually backwards from the norm, usually your truck versions are lower hp, higher tq and your car versions are higher hp lower tq. If you did the whole top end conversion (and got the heads fixed to keep your CR close to what it was, as the chambers are different sizes) with the intake and heads, programming and at least a set of 4.56 gears, then you'd have something fun to play with. Until the trans and driveshaft broke.
Yes. The stock intake manifold on a CAR 5.7 is very similiar to the 6.1, just plastic and smaller ports. You would still have to do the whole conversion of the front of the engine process to use this manifold. The other thing is, the truck hemis through 08 are rated at 345hp, 370tq. The car hemis are rated at 340hp, but 375tq (390tq if you got a Daytona or any of the Chargers with the upgraded exhaust). That's actually backwards from the norm, usually your truck versions are lower hp, higher tq and your car versions are higher hp lower tq. If you did the whole top end conversion (and got the heads fixed to keep your CR close to what it was, as the chambers are different sizes) with the intake and heads, programming and at least a set of 4.56 gears, then you'd have something fun to play with. Until the trans and driveshaft broke.
Site Moderator
Joined: May 2008
Posts: 9,657
Likes: 24
From: Louisville, Ky
That little 345CI 345hp/375LB/FT engine in my 5220lb QC is quite impressive.
It pulls like an old big block. Modern technology is great!!
I bet it moves a Challenger or Charger around really nice!
I haven't had the pleasure of driving one of those yet.
It pulls like an old big block. Modern technology is great!!
I bet it moves a Challenger or Charger around really nice!
I haven't had the pleasure of driving one of those yet.
Banned
Joined: Nov 2005
Posts: 3,739
Likes: 8
From: MD
There's a reason for that: an old 383 (B block, 335/420) had pretty much the same specs (little more tq) but measured with the old gross hp system. Dropping even a stock 5.7 into an A body would be like dropping in a MODIFIED 383! Now I really wish that guy where I used to live was willing to part with the Demon he that never moved.
Registered User
Joined: Aug 2020
Posts: 1
Likes: 0
Record Breaker
Joined: Apr 2019
Posts: 1,681
Likes: 262
wrong. The 6.1l hemi intake and the 5.7l hemi are compatible. Only the 6.1l hemi intake will give you some horsepower gain but you will lose some torque. Just a helpful heads up i just did the swap last weekend. The only problem im having is an issue with the PCV system malfunctioning and giving my a car a multiple cylinder misfire. Which is fixable. Just need a better flowing PCV valve.
Also, unless you intend to put boost to it, if you had half a brain you would've put a 392 manifold on it. Nice hot air intake lol.