Increase Torque Engine LM7 Tahoe 5.3 LT 4X4 2000.

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

katz_kaw

TYF Newbie
Joined
Jun 21, 2017
Posts
15
Reaction score
2
Location
Chile, Santiago
Hello friends, I have a chevrolet tahoe 5.3 LT 4x4x 2000, with K & N air induction system, 6 inch lift, 315 / 70r17 tires and 17x9 tires. It was made a change of axle ratio, original 3.73, now ratio of 4.56 in both axes, calibration with a hypertech (performance fuel premium / regular, speedometer calibration, speed limiter with index of new tire, reprogramming new relation of axles and tires ). The transmission box is the 4-speed 4L60-E automatic, which says it supports up to 360 ft. lbf (488 N.m) of torque. My vehicle by catalog offers me 325 ft.lbf (441 nm), I want to make a modification and optimize it, to reach about 355 ft.lbf of torque. Investigating out there, they say that by changing the camshaft and torque converter I can improve on what I want. At the same time, I will have to change valves, pistons, valve spring, or something else to reinforce ????.

I hope your opinions about this, since I want to make the change without any inconvenience to buy what is necessary and not damage the engine or the transmission box.

Regards!
 

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
25,961
Reaction score
50,621
Location
Oregon
You can just change the camshaft, and if you do that you need upgraded valve springs , valve seals and hardened pushrods. Not valves or pistons. Torque converter is optional, depending on the cam specs. Most p!aces that offer custom cam grinds also offer the valve springs , pushrods and seals in a kit. I got mine from www.vincihighperformance.com. It's best to call and talk with the company you're going to buy a cam from, tell them what your plans are and let them make suggestions.
 
OP
OP
katz_kaw

katz_kaw

TYF Newbie
Joined
Jun 21, 2017
Posts
15
Reaction score
2
Location
Chile, Santiago
You can just change the camshaft, and if you do that you need upgraded valve springs , valve seals and hardened pushrods. Not valves or pistons. Torque converter is optional, depending on the cam specs. Most p!aces that offer custom cam grinds also offer the valve springs , pushrods and seals in a kit. I got mine from www.vincihighperformance.com. It's best to call and talk with the company you're going to buy a cam from, tell them what your plans are and let them make suggestions.


Thank you teacher for the recommendation.

I have a doubt, it is said that when one changes all this there are vibration problems (I think it must be by synchronization), is this true???, is solved with some extra modification, or the camshafts come with a calibration so that Do not vibrate the valve control train???.

Greetings, and thank you very much!
 

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
25,961
Reaction score
50,621
Location
Oregon
Thank you teacher for the recommendation.

I have a doubt, it is said that when one changes all this there are vibration problems (I think it must be by synchronization), is this true???, is solved with some extra modification, or the camshafts come with a calibration so that Do not vibrate the valve control train???.

Greetings, and thank you very much!
I've never heard of a vibration problem from a cam swap. There is no method to balance a cam.
 
OP
OP
katz_kaw

katz_kaw

TYF Newbie
Joined
Jun 21, 2017
Posts
15
Reaction score
2
Location
Chile, Santiago
I've never heard of a vibration problem from a cam swap. There is no method to balance a cam.

Ah okay =). And what about that effect of low revolutions, that when the camshaft is changed to a higher performance one, it has instability at low RPM?

Greetings, fantastic Denali you have, and thank you very much.


Now we need pics of your beast


Hello friend, here I have a couple of photos, see them. It is not very well equipped, but from what I can mention it has:

IMG-20170622-WA0000.jpg
iGxv05

jQcHDQ

foODnk


IMG-20170622-WA0002.jpg
IMG-20170622-WA0003.jpg

- K & N air intake.
- Tires and tires (315 / 70r17 BF Goodrich KO2 - XD Series 17x9 wheels).
- exhaust pipe and magnaflow muffler.
- Spohn lower control arms.
- Lift 6 "
- Fox 2.0 shock absorbers with reserve, and regulation.
- Dual direction shock absorber.
- High / low / fog lights with Led Fluxbeam OPT7.
- Led bar 50 "inches, and 32" inches.
- Rear LED lights in bumper (Tuff Stuff).
- Reprogramming of speedometer, tires, axle ratio, speed limiter and octane rating of premium benzine with Hypertech Max Energy.
- Winch Ironman 4x4 12.000 Lbs.

If I forget something I will attach it as well as more photos. I hope you like it. Regards!
 

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
25,961
Reaction score
50,621
Location
Oregon
Ah okay =). And what about that effect of low revolutions, that when the camshaft is changed to a higher performance one, it has instability at low RPM?

Greetings, fantastic Denali you have, and thank you very much.





Hello friend, here I have a couple of photos, see them. It is not very well equipped, but from what I can mention it has:

View attachment 84558
iGxv05

jQcHDQ

foODnk


View attachment 84559
View attachment 84560

- K & N air intake.
- Tires and tires (315 / 70r17 BF Goodrich KO2 - XD Series 17x9 wheels).
- exhaust pipe and magnaflow muffler.
- Spohn lower control arms.
- Lift 6 "
- Fox 2.0 shock absorbers with reserve, and regulation.
- Dual direction shock absorber.
- High / low / fog lights with Led Fluxbeam OPT7.
- Led bar 50 "inches, and 32" inches.
- Rear LED lights in bumper (Tuff Stuff).
- Reprogramming of speedometer, tires, axle ratio, speed limiter and octane rating of premium benzine with Hypertech Max Energy.
- Winch Ironman 4x4 12.000 Lbs.

If I forget something I will attach it as well as more photos. I hope you like it. Regards!
Nice looking truck. As for the cam at low revs, it's supposed to sound like it's got a cam so you'll like it. No instability.
 
OP
OP
katz_kaw

katz_kaw

TYF Newbie
Joined
Jun 21, 2017
Posts
15
Reaction score
2
Location
Chile, Santiago
Nice looking truck. As for the cam at low revs, it's supposed to sound like it's got a cam so you'll like it. No instability.

Hi Red Rocket, in your Denali you have changed camshaft, or what have you done to gain more torque?


Regards!
 

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
25,961
Reaction score
50,621
Location
Oregon
Hi Red Rocket, in your Denali you have changed camshaft, or what have you done to gain more torque?

Regards!
I have a camshaft ready to install, but it's not installed yet. I did install a Whipple supercharger a few weeks ago ,and installed dual valve springs, hardened pushrods, Vitron valve seals, and a rocker trunion upgrade last week, to get ready for the cam. I'm looking for horsepower as well as torque. I also have a set of longtube headers ordered.
 

Forum statistics

Threads
128,781
Posts
1,805,310
Members
91,760
Latest member
MyCleftNut

Latest posts

Top