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fabricating longer runner LT1 intake manifold

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Old Jul 18, 2006 | 04:00 PM
  #31  
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Re: fabricating longer runner LT1 intake manifold

Originally Posted by jerminator96
Have you had any experience with it? I'm thinking about going with SolidWorks, not sure yet. I'd love to design a new intake manifold for my LT1, maybe I could get Bret to build it for me. As i've said before, my welding skills are limited.

Jeremy
not much, you can get a free 30 day trial from their website. most of my cad experience was on autocad '95 lite at school.
Old Jul 18, 2006 | 04:14 PM
  #32  
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Re: fabricating longer runner LT1 intake manifold

Originally Posted by confused327
not much, you can get a free 30 day trial from their website. most of my cad experience was on autocad '95 lite at school.
I might have to download it to try it out. Did they even have 3 dimensional modeling in '95?
Old Jul 19, 2006 | 04:37 AM
  #33  
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Re: fabricating longer runner LT1 intake manifold

What throttle body are you running? I had the same issue when running a 52mm on my 383 turning similar RPM. The issue was cured by the AS&M monoblade where my MAP stayed at 99-100kpa until the limiter at 7000.
I'm running a 58MM Holley and the TB bores are appropriately opened up to 58 MM + a tad bit to avoid a step. The 58 mm TB yields about 8 sq inches of flow area compared to about 12 sq inches of flow area in my 4" CAI. You may have a point about the monoblade. Anybody have one laying around that I can do a before/after dyno test on??

Steve

Last edited by SABLT194; Jul 19, 2006 at 04:54 AM.
Old Jul 20, 2006 | 11:40 AM
  #34  
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Re: fabricating longer runner LT1 intake manifold

Hey Steve, I have a Monoblade sitting in my garage. I bought it about a month ago, just havent had anytime to install it. Let me know what you have in mind, or when you would need it. I would be curious to see the before and after results myself. Do you have any pics of your 4" CAI? Let me know what you want to do.



Nick
Old Jul 20, 2006 | 01:08 PM
  #35  
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Re: fabricating longer runner LT1 intake manifold

Originally Posted by jerminator96
I might have to download it to try it out. Did they even have 3 dimensional modeling in '95?
it did, i was just really bad at it. my class was all 2d drawing. i just looked up tutorials online to get the idea because i finished the class 3 weeks early and was bored.
Old Jul 20, 2006 | 01:53 PM
  #36  
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Re: fabricating longer runner LT1 intake manifold

I have a sheet metal intake with six inch runners. If someone can host the image I'll e-mail it so everyone can have a peek. The car gained 47 RWT @ 3000 rpm making more power everwhere until 6100 were it lost 20 some @ 7000 rpm. In the process of recamming the car to compensate and push the powerband back up some.

FYI.....I'm using a ASM monoblade for the TB.
Old Jul 20, 2006 | 02:54 PM
  #37  
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Re: fabricating longer runner LT1 intake manifold

Denny,

If you email the file to me I can put it on cardomain and link it. Just send it to the board E-mail.

Chris
Old Jul 20, 2006 | 03:03 PM
  #38  
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Re: fabricating longer runner LT1 intake manifold

Originally Posted by confused327
it did, i was just really bad at it. my class was all 2d drawing. i just looked up tutorials online to get the idea because i finished the class 3 weeks early and was bored.
I know the feeling, I finished my cad class early in highschool and spent a month "carving" a LeMans car out of a solid block on AutoCad 2000.

I have a friend who is going to give me autocad '07 and solidworks '04, if I ever get around to designing a manifold I'll post pics on here. Maybe someone will think it's worth building.

Jeremy
Old Jul 20, 2006 | 04:01 PM
  #39  
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Re: fabricating longer runner LT1 intake manifold

Originally Posted by Denny McLain
I have a sheet metal intake with six inch runners. If someone can host the image I'll e-mail it so everyone can have a peek. The car gained 47 RWT @ 3000 rpm making more power everwhere until 6100 were it lost 20 some @ 7000 rpm. In the process of recamming the car to compensate and push the powerband back up some.

FYI.....I'm using a ASM monoblade for the TB.

www.imageshack.com


free hosting

David
Old Jul 20, 2006 | 04:03 PM
  #40  
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Re: fabricating longer runner LT1 intake manifold

Originally Posted by Guss_B
Isn't that intake pictured in the car on the first page a modified gm ram jet 350 intake?


Thats what it started as, would have been cheaper just to get a full blown sheetmetal done.



David
Old Jul 20, 2006 | 05:01 PM
  #41  
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Re: fabricating longer runner LT1 intake manifold

Originally Posted by jerminator96
I know the feeling, I finished my cad class early in highschool and spent a month "carving" a LeMans car out of a solid block on AutoCad 2000.

I have a friend who is going to give me autocad '07 and solidworks '04, if I ever get around to designing a manifold I'll post pics on here. Maybe someone will think it's worth building.

Jeremy
thats cool, you're better at it than me then! my schools version was hacked to work on xp and there were lots of errors and lite was real limited anyhow. Good luck designing one!
Old Jul 20, 2006 | 06:53 PM
  #42  
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Re: fabricating longer runner LT1 intake manifold

Here's a pic of the 4" CAI. It's probably overkill but at least it's one less thing to worry about. You can see I ditched the MAF with a speed density tune as well to further eliminate any restriction possibility




Steve
Old Jul 20, 2006 | 07:07 PM
  #43  
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Re: fabricating longer runner LT1 intake manifold

Originally Posted by Guss_B
Isn't that intake pictured in the car on the first page a modified gm ram jet 350 intake?
Yea.
The only thing left that is Ram Jet is the port flanges and injector holes.
Old Jul 20, 2006 | 07:09 PM
  #44  
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Re: fabricating longer runner LT1 intake manifold

Originally Posted by SABLT194
Here's a pic of the 4" CAI. It's probably overkill but at least it's one less thing to worry about. You can see I ditched the MAF with a speed density tune as well to further eliminate any restriction possibility




Steve
A K&N set up will flow in excess of 1300CFM with a 12" long K&N filter on it.
Old Jul 20, 2006 | 07:22 PM
  #45  
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Re: fabricating longer runner LT1 intake manifold

I'm running a 6" diameter X 9" long cylindrical K&N with a 4" inlet. I should have pretty god flow with that. It's about all I could get crammed in the fenderwell while keeping all of the inner fenderwell plastic intact. I forget the calculations but the K&N should be plenty big enough for the 355 @ 6800.

also,

"Hey Steve, I have a Monoblade sitting in my garage. I bought it about a month ago, just havent had anytime to install it. "

I'll need to take a look at what it will take to open up my twin 58MM bores in the intake manifold to fit a ASM monoblade.

Last edited by SABLT194; Jul 20, 2006 at 07:25 PM.



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