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

Why is my 408 a dog down low?

Thread Tools
 
Search this Thread
 
Old Feb 27, 2007 | 02:16 AM
  #111  
thunder550's Avatar
Thread Starter
High on diesel fumes
iTrader: (70)
 
Joined: Mar 2005
Posts: 12,658
Likes: 3
From: Phoenix, AZ
Default

Originally Posted by thunder550


In my logs from last night I can clearly see the RPM's take off at about 2800 RPM. I think if I can get the turbo on there and get the converter stalling back up to 2800 I'll be golden.


Haha I used my scan gauge to make some 1/4 mile runs, I got 14.6 @ 101 and 17.3 @ 103

Damn short time is killing me!
Bringing this one back from the dead

Update with the turbo on. I can now brake stall up to 3000 RPM and build 5 psi off the line. I ran another 1/4 with my scan gauge and it showed a 13.3 @ 103, this is with 5 psi off the line and 3 psi the rest of the way. Didn't take much boost to wake this thing up! I have a boost controller on order now so I'm hoping to bump it up to 6 or 7 psi here shortly

Oh, and I can spin the tires now!
Reply
Old Feb 27, 2007 | 08:49 AM
  #112  
Quik's Avatar
5 year bitches!
iTrader: (7)
 
Joined: Oct 2003
Posts: 4,890
Likes: 2
From: Pittsburgh!!!!!!!! Pa
Default

well thats good
Reply
Old Feb 27, 2007 | 09:33 AM
  #113  
ZR1 DREAMING's Avatar
TECH Senior Member
iTrader: (28)
 
Joined: Aug 2005
Posts: 8,277
Likes: 1
From: Ham Lake, MN
Default

Well good to hear you are happy with your combo now. How is it up top?
Reply
Old Feb 27, 2007 | 09:42 AM
  #114  
thunder550's Avatar
Thread Starter
High on diesel fumes
iTrader: (70)
 
Joined: Mar 2005
Posts: 12,658
Likes: 3
From: Phoenix, AZ
Default

I think that if I put it on a dyno I'd find that the power really starts to fall off in the upper 5000's. Right now I'm shifting at 6300 on the 1-2 shift and 6200 on the 2-3 shift, I need to bring that down some. I'm thinking that shifting at maybe shifting at 6100 1-2 and 5900 2-3 would probably be about right. I want to see how it likes more boost though before I mess with the shift points.
Reply
Old Feb 27, 2007 | 10:25 AM
  #115  
ZR1 DREAMING's Avatar
TECH Senior Member
iTrader: (28)
 
Joined: Aug 2005
Posts: 8,277
Likes: 1
From: Ham Lake, MN
Default

Any opinions on that LS2 truck intake? I think you'd see a nice improvemnet swapping to the FAST 90, power wise and widening that RPM band out for your cam.
Reply
Old Feb 27, 2007 | 10:58 AM
  #116  
thunder550's Avatar
Thread Starter
High on diesel fumes
iTrader: (70)
 
Joined: Mar 2005
Posts: 12,658
Likes: 3
From: Phoenix, AZ
Default

I really don't have anything to compare it to. I probably would see some gains from a FAST 90, but for now that's something I don't have money for. Might be something to put on the future mod list.
Reply
Old Feb 27, 2007 | 11:03 AM
  #117  
kbracing96's Avatar
TECH Senior Member
iTrader: (26)
 
Joined: Jul 2004
Posts: 9,485
Likes: 31
From: Oakland, OR
Default

I think you need a different cam.
Reply
Old Feb 27, 2007 | 11:17 AM
  #118  
thunder550's Avatar
Thread Starter
High on diesel fumes
iTrader: (70)
 
Joined: Mar 2005
Posts: 12,658
Likes: 3
From: Phoenix, AZ
Default

You want me to sell you this one too?
Reply
Old Feb 27, 2007 | 11:34 AM
  #119  
kbracing96's Avatar
TECH Senior Member
iTrader: (26)
 
Joined: Jul 2004
Posts: 9,485
Likes: 31
From: Oakland, OR
Default

Originally Posted by thunder550
You want me to sell you this one too?
Nope!, the one I have now is just fine
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Wolftrk99
INTERNAL ENGINE MODIFICATIONS
14
Oct 2, 2015 08:17 AM
LSX-81-SIERRA
FORCED INDUCTION
3
Oct 2, 2015 07:05 AM
carid
Sponsor's Announcements, Sales, and Specials
0
Oct 1, 2015 09:22 AM
Rockrz
GM Engine & Exhaust Performance
4
Sep 29, 2015 09:07 AM
sTNT971
FORCED INDUCTION
6
Sep 26, 2015 04:22 PM




All times are GMT -5. The time now is 01:41 AM.