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

Heads, New Cam, and Intake install on my 4.8

Thread Tools
 
Search this Thread
 
Old Mar 23, 2009 | 01:50 PM
  #161  
hirdlej's Avatar
TECH Junkie
iTrader: (31)
 
Joined: Dec 2004
Posts: 3,471
Likes: 1
From: Minneapolis, MN
Default

Originally Posted by BlackGMC
Yep it is a 4.8 unfortunately

I will say this, the new heads made my verter alot looser, which is good and bad... I liked the way my verter was before not tooo loose not tooo tight, now it is a tad tooo loose.. It poped the PO757 code yesterday, which sucks, i need to tune it out, but i have been lazy... My 60fts better be in the 1.8 range now
Corey, when is your new cam scheduled to arrive??? I got mine in Saturday. Haven't driven the truck yet to know how it goes If you get your cam this week, think you'll have it in and running by next weekend?
Reply
Old Mar 23, 2009 | 02:18 PM
  #162  
BlackGMC's Avatar
Thread Starter
Resident Retard
iTrader: (31)
 
Joined: Jan 2006
Posts: 17,216
Likes: 20
From: Fort Worth - TX
Default

My new cam should arrive on Wednesday . If i don't get tied up i am going to try and install it on Sunday!!!
Reply
Old Mar 23, 2009 | 09:45 PM
  #163  
TECH Resident
 
Joined: Aug 2008
Posts: 842
Likes: 0
From: East of the east bay CA
Default

I watched your vid you posted a few pages back, man the exhaust sounds alot deeper. I am looking forward to seeing this outcome at the track.
Reply
Old Mar 23, 2009 | 09:57 PM
  #164  
GMCtrk's Avatar
TECH Senior Member
iTrader: (27)
 
Joined: Jul 2004
Posts: 12,275
Likes: 19
From: Dallas
Default

with the higher compression, the exhaust definitely thumps more.
Reply
Old Mar 24, 2009 | 08:38 AM
  #165  
BlackGMC's Avatar
Thread Starter
Resident Retard
iTrader: (31)
 
Joined: Jan 2006
Posts: 17,216
Likes: 20
From: Fort Worth - TX
Default

Originally Posted by sharky05
I watched your vid you posted a few pages back, man the exhaust sounds alot deeper. I am looking forward to seeing this outcome at the track.
Hopefully hitting the track tomorrow!
Reply
Old Mar 24, 2009 | 11:06 AM
  #166  
budhayes3's Avatar
PT's Slowest Truck
iTrader: (19)
 
Joined: Apr 2004
Posts: 17,863
Likes: 2
From: Hackensack, NJ
Default

I forgot that you were doing this in stages, heads-test-cam-test-etc. It'll be cool to see how the mods affect your numbers
Reply
Old Mar 24, 2009 | 11:26 AM
  #167  
TVI's Avatar
TVI
On The Tree
 
Joined: Jul 2005
Posts: 112
Likes: 0
From: Haltom City, Texas
Default

Originally Posted by GMCtrk
with the higher compression, the exhaust definitely thumps more.
I agree, sounds good. Very interested in seeing how the new FTI cam does.
Reply
Old Mar 24, 2009 | 11:31 AM
  #168  
hirdlej's Avatar
TECH Junkie
iTrader: (31)
 
Joined: Dec 2004
Posts: 3,471
Likes: 1
From: Minneapolis, MN
Default

I will tell you that my FTI rebel TQXL increased my exhaust volume and low end tone by about 30% LoL. I still haven't driven the truck after the cam swap. It's still hibernating in the garage for the salt and sand to get off the roads. My truck never droned a bit with any of my previous setups, my new FTI cam totally changed everything. The truck has a mind numbing low end growl. It sounds like a big block marine engine if you've ever heard one run. Where they run the exhaust under the water. No cackle, just loud and low sound frequency. I like it You'll definatly draw attention wherever you go. There's no mistaken that it's something you don't want to "F" with.
Reply
Old Mar 24, 2009 | 11:36 AM
  #169  
BlackGMC's Avatar
Thread Starter
Resident Retard
iTrader: (31)
 
Joined: Jan 2006
Posts: 17,216
Likes: 20
From: Fort Worth - TX
Default

Originally Posted by budhayes3
I forgot that you were doing this in stages, heads-test-cam-test-etc. It'll be cool to see how the mods affect your numbers
Yep, the MAIN reason i decided to do it this way is to see how the parts affected my tune.

For example, my current cam dropped the lower areas of my VE table by about 60%(400rpm)-40%(800rpm)-20%(1200rpm).

Then when i added the heads, it increased the same rows by about 10-20%, strang huh?

Now i am curious to see what the new cam does....

Also if i would have added all three of those parts at once, i bet i would still be trying to get it to idle ...

Originally Posted by TVI
I agree, sounds good. Very interested in seeing how the new FTI cam does.
Me too

Originally Posted by hirdlej
I will tell you that my FTI rebel TQXL increased my exhaust volume and low end tone by about 30% LoL. I still haven't driven the truck after the cam swap. It's still hibernating in the garage for the salt and sand to get off the roads. My truck never droned a bit with any of my previous setups, my new FTI cam totally changed everything. The truck has a mind numbing low end growl. It sounds like a big block marine engine if you've ever heard one run. Where they run the exhaust under the water. No cackle, just loud and low sound frequency. I like it
Interesting in a good and bad way... I don't need my truck to be any louder than it is right now...
Reply
Old Mar 24, 2009 | 12:10 PM
  #170  
00ChevyScott's Avatar
Wearin' da big hat
iTrader: (10)
 
Joined: Jan 2008
Posts: 10,262
Likes: 9
From: Over There
Default

Originally Posted by BlackGMC
Yep, the MAIN reason i decided to do it this way is to see how the parts affected my tune.

For example, my current cam dropped the lower areas of my VE table by about 60%(400rpm)-40%(800rpm)-20%(1200rpm).

Then when i added the heads, it increased the same rows by about 10-20%, strang huh?

Now i am curious to see what the new cam does....

Also if i would have added all three of those parts at once, i bet i would still be trying to get it to idle ...



Me too



Interesting in a good and bad way... I don't need my truck to be any louder than it is right now...
If its too loud, lemme know if u decide to sell your current exhaust. I love the way it sounds.
Reply



All times are GMT -5. The time now is 07:42 PM.