LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1 Exhaust Manifold.

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Old Jun 29, 2014 | 11:34 PM
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Default LT1 Exhaust Manifold.

I have a friend that used the 5.3 truck manifolds flipped upside down on his ls1 swapped s30 car and ran the exhaust out of the hood. Is there a similar way to do this with the lt1? will the exhaust manifolds on the LT1 work upside down? Or will the 5.3 truck manifolds work on the LT1?
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Old Jun 30, 2014 | 08:08 AM
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Dont flip your manifolds upside down. Do you really want your exaust coming out of your hood?
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Old Jun 30, 2014 | 08:31 AM
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Originally Posted by FCLT1
I have a friend that used the 5.3 truck manifolds flipped upside down on his ls1 swapped s30 car and ran the exhaust out of the hood. Is there a similar way to do this with the lt1? will the exhaust manifolds on the LT1 work upside down? Or will the 5.3 truck manifolds work on the LT1?
An LT1 and a 5.3 are completely different motors so no you can't use them. People that flip them are usually building turbo motors, not being gay and sticking pipes out of the hood...
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Old Jun 30, 2014 | 08:32 AM
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Ls series or gen III and later motors have completely different port spacing than Gen 1 and lt1 motors
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Old Jun 30, 2014 | 11:43 PM
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well what I'm running into is more of a space issue more than trying to be "cool" if that's what you guys are getting at. My LT1 is going into a 91 rx7 so exhaust clearance poses a problem.
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Old Jun 30, 2014 | 11:45 PM
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Now with that being said.. instead of saying I'm being gay can the lt1 manifolds be flipped upside down?
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Old Jul 1, 2014 | 12:44 AM
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I dont see why you couldnt reverse them so instead of the exhaust going out the back it could go infront of the motor. Flipping them upside down idk, but i guess it would work
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Old Jul 1, 2014 | 06:52 AM
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Originally Posted by DUDCOUPE
I dont see why you couldnt reverse them so instead of the exhaust going out the back it could go infront of the motor. Flipping them upside down idk, but i guess it would work
not a whole lot of room in the front as well once I get the radiator and fans in there. The reason my buddy flipped his upside down was it was way cheaper to do that than buying the ridiculously expensive swap headers that are made to fit the chassis
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Old Jul 1, 2014 | 07:31 AM
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Originally Posted by FCLT1
I have a friend that used the 5.3 truck manifolds flipped upside down on his ls1 swapped s30 car and ran the exhaust out of the hood. Is there a similar way to do this with the lt1? will the exhaust manifolds on the LT1 work upside down? Or will the 5.3 truck manifolds work on the LT1?
Yes you can flip them.
No the 5.3L LS (Vortech) manifolds wont work.
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Old Jul 1, 2014 | 10:36 AM
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I wouldn't flip them because they are "D" shaped ports. You would be blocking off some of the port. Some aftermarket headers for the LT1 are oval port, those you could flip.

Why not just get a cheap set of block huggers? They are like $100 from Summit.
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Old Jul 1, 2014 | 03:21 PM
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I think 5.3 manifold will work on a LT1 then you can run the exhaust out the headlights of your rx7. That would be bitch'n
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Old Jul 1, 2014 | 03:29 PM
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Originally Posted by guppymech
I think 5.3 manifold will work on a LT1 then you can run the exhaust out the headlights of your rx7. That would be bitch'n
What.....
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Old Jul 1, 2014 | 03:50 PM
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Find out what small block Chevy headers work on Gen 2 rx7s and just run those.

tons of people have put sbc motors into those so there's obviously gonna be at least one brand that will fit
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Old Jul 1, 2014 | 08:11 PM
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Originally Posted by myltwon
Find out what small block Chevy headers work on Gen 2 rx7s and just run those.

tons of people have put sbc motors into those so there's obviously gonna be at least one brand that will fit
I know there is plenty of swap headers, but like I mentioned recently they are pretty pricey. I'm trying to find a practical cheap diy way to make the swap fit without dumping loads into the headers.
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Old Jul 2, 2014 | 04:50 PM
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Granny speed shop has some for $400 and hedman has some for $180. It'll make plug access, sound, and power much better
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Old Jul 13, 2014 | 03:41 AM
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I built a lt1 rx7 a few years ago the stock f-body manifolds fit great in the fc
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