GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

finally cammed...thoughts and questions

Thread Tools
 
Search this Thread
 
Old 04-22-2010 | 10:32 PM
  #11  
jg53's Avatar
TECH Enthusiast
iTrader: (10)
 
Joined: Jul 2009
Posts: 504
Likes: 0
From: kyle tx
Default

im assuming it was a dyno tune since you posted the rwhp and the cost. am i right?
Old 04-22-2010 | 10:33 PM
  #12  
00ChevyScott's Avatar
Wearin' da big hat
iTrader: (10)
 
Joined: Jan 2008
Posts: 10,262
Likes: 9
From: Over There
Default

Wow that better have been a dyno tune. Thats more than double what I paid for my own tuning software.
Old 04-23-2010 | 07:22 AM
  #13  
silverad08's Avatar
Thread Starter
Teching In
 
Joined: Feb 2010
Posts: 22
Likes: 0
From: Walker, LA
Default

Yes, it was a dyno tune and T/M was removed. also tuned for 93. Any muffler suggestions?
Old 04-23-2010 | 08:23 AM
  #14  
Preston129's Avatar
TECH Fanatic
iTrader: (3)
 
Joined: Feb 2010
Posts: 1,192
Likes: 1
Default

This is unrelated to your posts, but out of curiosity did you happen to measure lifter preload? you went with 7.425 PRs and LS7 lifters correct?
Old 04-23-2010 | 08:36 AM
  #15  
sonoma43's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Jul 2005
Posts: 1,279
Likes: 0
From: Saint Joseph, MI
Default

For a muffler, I think the aerchamber would fit what your looking for, I run one with LT's and no cats with single tail pipe and it sounds good, it is a little quiet for me but loud enough for most people. I also have the TR220-112 cam in mine with a 3200 stall and it seems to do decent off the line considering the weight of it. I would look into your tune more, for a little more HP
Old 04-23-2010 | 09:19 AM
  #16  
8.1 HD's Avatar
Launching!
iTrader: (3)
 
Joined: Jun 2004
Posts: 256
Likes: 0
From: CT
Default

Definetly sounds like there is way more left in your tune, combined with the 3.42 gears. I'd go with 4.10's to get that thing out of the hole better.
Old 04-23-2010 | 10:51 AM
  #17  
iamkeniff's Avatar
Moderator
iTrader: (16)
 
Joined: Apr 2007
Posts: 5,365
Likes: 3
From: Gonzales, la
Default

honestly i dont think your tune is up to the scale. even though your on 3:42s you should have had more HP than that. i would have guess 325-335.
how do you figure its a turd out the hole? if i flat foot my truck itll spin its *** off an i dont have any internal engine work an i have 3:42s
Old 04-23-2010 | 11:16 AM
  #18  
bad intentions's Avatar
TECH Enthusiast
iTrader: (5)
 
Joined: May 2005
Posts: 561
Likes: 0
From: Roma/Edinburg TX
Default

oh a dyno tune is different than street tunes, and i would also think that with a stall the tires would be done by now....like most of them are saying there is still HP that needs to be found i would take the tuner for a ride so he can feel his work.... and cant go wrong with magnaflow 3in muffler i really like mine.
Old 04-23-2010 | 11:39 AM
  #19  
skipperdaddy's Avatar
TECH Resident
iTrader: (7)
 
Joined: Jul 2008
Posts: 783
Likes: 0
From: Gonzales, LA
Default

TRUCKSHOP!!! WHERE ARE YOU!!!! Help this man out!!!!!
Old 04-23-2010 | 11:43 AM
  #20  
silverad08's Avatar
Thread Starter
Teching In
 
Joined: Feb 2010
Posts: 22
Likes: 0
From: Walker, LA
Default

Originally Posted by Preston129
This is unrelated to your posts, but out of curiosity did you happen to measure lifter preload? you went with 7.425 PRs and LS7 lifters correct?
cam, springs and pr's(7.425") came as a package from comp. used ls7 lifters and no I didn't check preload.

Just talked with the tuner and he said to bring it by tomorrow to check the surging issue...if its not pouring rain

Also he set my shift point at 6200 but won't that cam make power up to 6800 or so? I really dont want to tear up my stock tranny and if another 600rpm is where the extra 10-15hp is hiding, I'd rather just leave it alone. Just seems like I'm missing something down low. Once I hit about 35-40 the truck starts to feel strong, but seems weak up to that point. I realize gears would help but until I get a 4 banger to drive back and forth to work, I'll have to keep the 3.42s.

Does that magnaflow have much rasp or popping when you let off?


Quick Reply: finally cammed...thoughts and questions



All times are GMT -5. The time now is 04:40 AM.