Increase Torque Engine LM7 Tahoe 5.3 LT 4X4 2000.

[katz_kaw]

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]

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.

 

[katz_kaw]

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]

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.

 

[inmypassatlife]

Now we need pics of your beast

 

[katz_kaw]

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:

- 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]

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

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.

 

[inmypassatlife]

Nice ride, great looking wheel and tire setup

 

[katz_kaw]

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]

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.

 

[katz_kaw]

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.

Woow great, this job should be doing very well.

Query, I do not know much about measures, closings, and openings of the cams, I would like to know if you can orientate me a bit, since I look for Force, torque of torque. A dealer offered me a camshaft of CompCams and a Kit Of Valves, check it:

Http://www.compperformancegroupstor...oduct_Code=54-450-11&Category_Code=XFIXTRTRCK

Http://www.compperformancegroupstor...de=CC&Product_Code=26918CS-KIT&Category_Code=

In the post that you have of your Denali commented about a synchronizer, that I will need if I change my cams and valve complements ??.

I hope you can answer everything, and thank you very much for your guidance.

Greetings, a hug!

 

[Rocket Man]

Woow great, this job should be doing very well.

Query, I do not know much about measures, closings, and openings of the cams, I would like to know if you can orientate me a bit, since I look for Force, torque of torque. A dealer offered me a camshaft of CompCams and a Kit Of Valves, check it:

Http://www.compperformancegroupstor...oduct_Code=54-450-11&Category_Code=XFIXTRTRCK

Http://www.compperformancegroupstor...de=CC&Product_Code=26918CS-KIT&Category_Code=

In the post that you have of your Denali commented about a synchronizer, that I will need if I change my cams and valve complements ??.

I hope you can answer everything, and thank you very much for your guidance.

Greetings, a hug!

Not a synchronizer, I have a supercharger. Also known as a blower or forced induction. As far as which cam to get, it depends on your application and what you want to accomplish. I'm not the expert you need to talk to, but like I said earlier you need to talk to a good cam manufacturer and explain what you have and what your goals are. Talk to Comp Cams themselves or someone else like Vinci High Performance. Then you can shop around for the best price on a kit. That's all the help I can offer you. Good luck.

 

[katz_kaw]

Not a synchronizer, I have a supercharger. Also known as a blower or forced induction. As far as which cam to get, it depends on your application and what you want to accomplish. I'm not the expert you need to talk to, but like I said earlier you need to talk to a good cam manufacturer and explain what you have and what your goals are. Talk to Comp Cams themselves or someone else like Vinci High Performance. Then you can shop around for the best price on a kit. That's all the help I can offer you. Good luck.

View attachment 84590

Ah well, I understand. (Very fantastic your Supercharger), what you mean with Synchronizer? is a part separate? and role?

 

[Rocket Man]

Ah well, I understand. (Very fantastic your Supercharger), what you mean with Synchronizer? is a part separate? and role?

I never mentioned synchronizer, and I have no idea what you mean by synchronizer.

 

[Countryboy07]

If it were mine, I would start off with a set of long tube headers and a good custom tune. With those two modifications, you'll gain close to 30 horsepower

 

[katz_kaw]

Today my Vinci Trucker cam, dual valve springs and hardened pushrods came. My plan is to do the valve springs, pushrods, and rocker trunion upgrade on one weekend and the cam and timing gear on a separate weekend. Those springs look like some good shit, heavy duty as hell.

I never mentioned synchronizer, and I have no idea what you mean by synchronizer.

Sorry, I was wrong to interpret what you had started in your Denali thread, It was distribution gear. I add it up.

Consult, how could you know the exact measurement of the push rods without removing them from the cylinder head ?, I ask to see if you can help me and look for mine for some catalog, if there is no way I will have to disassemble.

Regards Red Rocket!

If it were mine, I would start off with a set of long tube headers and a good custom tune. With those two modifications, you'll gain close to 30 horsepower

Can you show me some photos of the two things you mention please ??

Greetings!

 

[Rocket Man]

Sorry, I was wrong to interpret what you had started in your Denali thread, It was distribution gear. I add it up.

Consult, how could you know the exact measurement of the push rods without removing them from the cylinder head ?, I ask to see if you can help me and look for mine for some catalog, if there is no way I will have to disassemble.

Regards Red Rocket!

I ordered a kit from Vinci High Performance that included cam, pushrods, dual valve springs and Vitron valve seals. They determined the pushrod length for me.

 

[Countryboy07]

Can you show me some photos of the two things you mention please ??

Greetings!

Few different places sell long tube headers, from budget friendly to top of the line. If your on a tight budget, speed engineering long tubes, found here: https://www.speed-engineering.com/s...ck-suv-longtube-headers-y-pipe-1999-2006.html, are a good choice. Some have had slight fitment issues with the install, such as @Tonyrodz here, while others had no issues whatsoever. Another budget friendly choice would be Texas speed, found here: https://www.texas-speed.com/c-3288-headers-xy-pipes_chevrolet-silverado1500-2005.aspx. They also have American Racing headers, which are what @Red Rocket has purchased. They are "top of the line" when it comes to headers for our vehicles.

Enough about exhaust... The second part of my recommendation was a good custom tune from someone using either HPtuners software, or EFI live software. Most of us around here use @BlackBearPerf for our custom tuning needs. They offer inperson tunes at tuning events, or mail order tuned. By looking at your location, I'd say you'd be going with a mail order tune. Check out their website: http://www.blackbearperformance.com/services.asp, and send them an email with any questions, you could also talk to them on here as they are a preferred vendor.

Hope this helps!

 

[katz_kaw]

Few different places sell long tube headers, from budget friendly to top of the line. If your on a tight budget, speed engineering long tubes, found here: https://www.speed-engineering.com/s...ck-suv-longtube-headers-y-pipe-1999-2006.html, are a good choice. Some have had slight fitment issues with the install, such as @Tonyrodz here, while others had no issues whatsoever. Another budget friendly choice would be Texas speed, found here: https://www.texas-speed.com/c-3288-headers-xy-pipes_chevrolet-silverado1500-2005.aspx. They also have American Racing headers, which are what @Red Rocket has purchased. They are "top of the line" when it comes to headers for our vehicles.

Enough about exhaust... The second part of my recommendation was a good custom tune from someone using either HPtuners software, or EFI live software. Most of us around here use @BlackBearPerf for our custom tuning needs. They offer inperson tunes at tuning events, or mail order tuned. By looking at your location, I'd say you'd be going with a mail order tune. Check out their website: http://www.blackbearperformance.com/services.asp, and send them an email with any questions, you could also talk to them on here as they are a preferred vendor.

Hope this helps!

Wow, thank you very much for all that information, I was looking at the speed-engineering page and the value is almost 400 dollars, is it a good quality option?

Second, excuse my ignorance, the performance blackbear is the same as Hypertech, or do other modifications?

Regards!

 

[b4z]

A longer duration higher lift cam will give you more power but usually at the expense of low rpm power one way to get some of it back is to go to a lower lsa. Which means the power will come on sooner. So if you have a 116 lsa now you could go to a 112 for example. But your idle quality will change it will be more rumpeta rumpeta. Comp cams makes a 212/218 will give more power and have decent idle quality. Since you have already done gears your biggest improvement will come from a stall comvertor in the 2800 rpm range.