GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

People running A 408 N/A step inside please!

Thread Tools
 
Search this Thread
 
Old Apr 4, 2008 | 01:32 PM
  #1  
06 TRed GTO's Avatar
Thread Starter
Staging Lane
 
Joined: Sep 2006
Posts: 64
Likes: 0
From: ST.Petersburg,FL
Question People running A 408 N/A step inside please!

What size cams are you guys running in with a N/A 408ci

I am having a custom cam made and I am just trying to get a ball park of what you guys are coming up with for different sizes. I am thinking of something in the hi 230's/ and low 240's with a lift around .560's so I can run z06 springs to help keep the valve train noise to a min.

I will be running the stock truck intake ( I know ,I know I am just going for the stealth look) and will be running a 100-150 wet shot on top of that.







.
Reply
Old Apr 4, 2008 | 01:43 PM
  #2  
ZZebes's Avatar
TECH Junkie
iTrader: (10)
 
Joined: Feb 2007
Posts: 3,111
Likes: 1
Default

Run a set of patriot duals don't run Z06 springs with that big of a cam

my patriots are dead quiet
Reply
Old Apr 4, 2008 | 01:48 PM
  #3  
99Silverado5.3's Avatar
TECH Addict
iTrader: (7)
 
Joined: May 2004
Posts: 2,558
Likes: 0
From: (281)-(713)-(832)
Default

Running a truck intake on a n/a 408 is going to keep you very limited.
Reply
Old Apr 4, 2008 | 02:25 PM
  #4  
06 TRed GTO's Avatar
Thread Starter
Staging Lane
 
Joined: Sep 2006
Posts: 64
Likes: 0
From: ST.Petersburg,FL
Default

Originally Posted by 99Silverado5.3
Running a truck intake on a n/a 408 is going to keep you very limited.
I agree thats why I am going with spray also. If I make it to the 380-400 RWHP N/A I will be happy and then spray it to 500+
Reply
Old Apr 4, 2008 | 03:45 PM
  #5  
ZZebes's Avatar
TECH Junkie
iTrader: (10)
 
Joined: Feb 2007
Posts: 3,111
Likes: 1
Wink

Originally Posted by 06 TRed GTO
I agree thats why I am going with spray also. If I make it to the 380-400 RWHP N/A I will be happy and then spray it to 500+
I made 380 on **** heads and an X1 cam with a 6.0L
Reply
Old Apr 4, 2008 | 04:47 PM
  #6  
joshua022's Avatar
TECH Fanatic
15 Year Member
iTrader: (12)
 
Joined: Apr 2007
Posts: 1,278
Likes: 0
From: Douglasville, GA
Default

I mad 390 on a stinkin 5.3!!! if the truck intake will hold a 408 back that much I wouldn't even do the swap... why waste all that money?
Reply
Old Apr 4, 2008 | 05:35 PM
  #7  
chris04's Avatar
12 Second Truck Club
iTrader: (6)
 
Joined: Dec 2006
Posts: 310
Likes: 0
From: Galivants ferry, South Carolina
Default

Originally Posted by joshua022
I mad 390 on a stinkin 5.3!!! if the truck intake will hold a 408 back that much I wouldn't even do the swap... why waste all that money?
i don't think the truck intake holds it back like everyone thinks and this is my opinion, my buddy has a rcsb 2003 with a 408, his cam is a 232/236 with like a 630ish lift, not too sure tho, but with truck intake and stock injectors he put down 423rwhp, and his injectors are maxed out of course, and don't get me wrong i know that a different intake will help but i just don't think the truck intake hurts it like everyone makes it out to be....
Reply
Old Apr 4, 2008 | 05:45 PM
  #8  
tarinitup's Avatar
9 Second Truck Club
iTrader: (11)
 
Joined: Sep 2005
Posts: 2,442
Likes: 1
From: Odessa Texas
Default

I was spec'd a 238 242 .612 lift for a 402 with truck intake. New cam going in is a 239 251 .619 .630 on XER lobes for the 402 ls6 intake and 250 shot.
Reply
Old Apr 4, 2008 | 06:21 PM
  #9  
rgvsierra's Avatar
TECH Fanatic
iTrader: (7)
 
Joined: Jul 2002
Posts: 1,482
Likes: 0
From: RGV, Texas
Default

mine is a 246-248 112.
Reply
Old Apr 4, 2008 | 06:42 PM
  #10  
99Silverado5.3's Avatar
TECH Addict
iTrader: (7)
 
Joined: May 2004
Posts: 2,558
Likes: 0
From: (281)-(713)-(832)
Default

Originally Posted by 06 TRed GTO
I agree thats why I am going with spray also. If I make it to the 380-400 RWHP N/A I will be happy and then spray it to 500+
If you'd be happy with 380-400rwhp, get a 6.0L and spend that extra $2000+ elsewhere. A full bolt-on cam 6L w/ stock 317s and truck intake will get you that.
Reply



All times are GMT -5. The time now is 01:09 AM.