Jim Z06
Active member
Want to replace stock MAF sensor with after market unit. Considering the Granatelli Motorsports unit. Has anyone used this? Do you have to reset the computer after intallation? Any feedback would be appreciated. Thanks Jim
Which MAF Sensor?
- Thread starter Jim Z06
- Start date
c4c5specialist
Technical Advisor
HI there,
I would not suggest this course of action.
Your 02 already has a larger bore, and no screen, so you will flow up to 750 CFM, which will support 575 horsepower.
You will not be getting proportionate gains to money spent.
Allthebest, c4c5
I would not suggest this course of action.
Your 02 already has a larger bore, and no screen, so you will flow up to 750 CFM, which will support 575 horsepower.
You will not be getting proportionate gains to money spent.
Allthebest, c4c5
V
VetteMan
Guest
Remove screen
C4C5,
I added a dual tube intake with K & N filters and a larger intake neck to my 2001 LS6. While doing that I removed the screen from my stock MAF. Do you think I gained anything from all this? I did it because I have the 02 cam in the engine. It sounds throatier when idling now. No exhaust mods though.
Would high flow converters be worth the buck on this car? Believe it or not most of the aftermarket shops have actually told me to stop right where I'm at.
I've though about taking it out to Carlisle in August for a dyno run. This would answer all questions on my concerns about the engine. If I do this, what rear wheel hp (minimum) should I expect see on this car, mods or not.
Also, please read my post in the Z06 tech discussion (under "numbers" thread) about my engine change. Appreciate your help.
VetteMan
C4C5,
I added a dual tube intake with K & N filters and a larger intake neck to my 2001 LS6. While doing that I removed the screen from my stock MAF. Do you think I gained anything from all this? I did it because I have the 02 cam in the engine. It sounds throatier when idling now. No exhaust mods though.
Would high flow converters be worth the buck on this car? Believe it or not most of the aftermarket shops have actually told me to stop right where I'm at.
I've though about taking it out to Carlisle in August for a dyno run. This would answer all questions on my concerns about the engine. If I do this, what rear wheel hp (minimum) should I expect see on this car, mods or not.
Also, please read my post in the Z06 tech discussion (under "numbers" thread) about my engine change. Appreciate your help.
VetteMan
c4c5specialist
Technical Advisor
Hi there,
Well, honestly, probably not.
Here is why. The 02 camshaft is designed to give better breathing efficiency WITH the cylinder heads of the 02. Without the cylinder heads, you may be a little bit stronger than the 01, but not by as much as if you had the heads.
I would NOT dyno this car, if the 02 cylinder heads were not used.
Remember that they have different valves, spring rates, and port designs.
If you had not changed all of these, you will be sitting on a timebomb if you dyno this car. Not because it will definately break, but because the rest of the engine is not built around the new camshaft.
As for the rest, I would suggest FLP headers and converters.
I have done alot of these, and they maintain EPA emissions guidelines, and are a direct bolton.
They take about 4 hours to install.
Allthebest, c4c5
Well, honestly, probably not.
Here is why. The 02 camshaft is designed to give better breathing efficiency WITH the cylinder heads of the 02. Without the cylinder heads, you may be a little bit stronger than the 01, but not by as much as if you had the heads.
I would NOT dyno this car, if the 02 cylinder heads were not used.
Remember that they have different valves, spring rates, and port designs.
If you had not changed all of these, you will be sitting on a timebomb if you dyno this car. Not because it will definately break, but because the rest of the engine is not built around the new camshaft.
As for the rest, I would suggest FLP headers and converters.
I have done alot of these, and they maintain EPA emissions guidelines, and are a direct bolton.
They take about 4 hours to install.
Allthebest, c4c5
V
VetteMan
Guest
Re: Do not Dyno
C4C5,
When they changed the cam they changed the valve springs also, but not the valves or heads. We had this discusion on another forum earlier. What I'm aving a hard time understanding is wether or not my engine is sound. Are saying that the long term driveability of my car is now comprimised? Should I be avoiding WOT starts with it? Would it be best to have the 02 cam taken back out?
Thanks!
VetteMan
C4C5,
When they changed the cam they changed the valve springs also, but not the valves or heads. We had this discusion on another forum earlier. What I'm aving a hard time understanding is wether or not my engine is sound. Are saying that the long term driveability of my car is now comprimised? Should I be avoiding WOT starts with it? Would it be best to have the 02 cam taken back out?
Thanks!
VetteMan
c4c5specialist
Technical Advisor
Hi there,
Fact is that when GM did the 02 engine, they made numerous changes, to keep Z reliable when revved higher.
The vehicle is not assembled with the same intent.
You are not driving an engine that has all the parts, or the ability of the 02 Z engine.
Sorry, but there is too much left to chance.
Consider this, GM spent alot of extra time and money to get sodium valves for 02, to reduce the weight of valvetrain parts. Why would you not install ALL the parts, to correctly follow GM engineered performance specifications?????
Allthebest, c4c5
Fact is that when GM did the 02 engine, they made numerous changes, to keep Z reliable when revved higher.
The vehicle is not assembled with the same intent.
You are not driving an engine that has all the parts, or the ability of the 02 Z engine.
Sorry, but there is too much left to chance.
Consider this, GM spent alot of extra time and money to get sodium valves for 02, to reduce the weight of valvetrain parts. Why would you not install ALL the parts, to correctly follow GM engineered performance specifications?????
Allthebest, c4c5
V
VetteMan
Guest
KABOOM!!!
C4C5,
OK, so my enigne may fail on the dyno, not much I can do about that now.
The FLP header system, could I install that myself? It looks pretty tight around the engine. The FLP system is sold with new converters, right?
Thanks!
VettMan
C4C5,
OK, so my enigne may fail on the dyno, not much I can do about that now.
The FLP header system, could I install that myself? It looks pretty tight around the engine. The FLP system is sold with new converters, right?
Thanks!
VettMan
H
HOTMOTORSPORTS
Guest
Excellent info C4C5. Thanks!!! It just goes to show that sometimes things should be left alone or get more information before....
VetteMan
Why would you want to bury yourself further. The Kaboom your referring to is reality. I'd suggest spending the money on updating the rest correctly.
Chuck
VetteMan
Why would you want to bury yourself further. The Kaboom your referring to is reality. I'd suggest spending the money on updating the rest correctly.
Chuck
V
VetteMan
Guest
Ka BLAM!!!
Guys,
I don't know, the only real difference, from a wear perspective, I've got is the heavier valves running against the slightly higher lift cam. The sodium valves were designed to be lighter to keep them from lifting off the lobes (floating correct term?) and the sodium helps deal with the heat. I used to float the valves on my 89 BMWis on a regular basis. The vette techs at my dealership put in higher rated springs that will keep the heavier valves clamped to the lobes. Granted, this will cause more wear on the lobes. Hey, what did they do before sodium filled valves? As far as heat, as you say I'm not getting the full effect without the 02 heads so is my heat level really that much more? Also, the Goodwrench replacement engine is a better constructed engine that the ones put in the cars when new, that from GM insiders, a purchasing agent and a factory assembly procedure consultant.
This car is going up on the barrels at Carlisle. If you're right I'll post a picture of it on the flatbed. And a picture of the holes in the hood from the connecting rods, right? It will have to be that bad, Kaboom, right? Should I wear Kevlar?
Which part will fail first? Guess correctly and I'll UPS it to you for bragging rights.
VetteMan
Guys,
I don't know, the only real difference, from a wear perspective, I've got is the heavier valves running against the slightly higher lift cam. The sodium valves were designed to be lighter to keep them from lifting off the lobes (floating correct term?) and the sodium helps deal with the heat. I used to float the valves on my 89 BMWis on a regular basis. The vette techs at my dealership put in higher rated springs that will keep the heavier valves clamped to the lobes. Granted, this will cause more wear on the lobes. Hey, what did they do before sodium filled valves? As far as heat, as you say I'm not getting the full effect without the 02 heads so is my heat level really that much more? Also, the Goodwrench replacement engine is a better constructed engine that the ones put in the cars when new, that from GM insiders, a purchasing agent and a factory assembly procedure consultant.
This car is going up on the barrels at Carlisle. If you're right I'll post a picture of it on the flatbed. And a picture of the holes in the hood from the connecting rods, right? It will have to be that bad, Kaboom, right? Should I wear Kevlar?
Which part will fail first? Guess correctly and I'll UPS it to you for bragging rights.
VetteMan
JBsC5
Well-known member
Vetteman,..If I may suggest that its an ideology of staying within the balance of a complete package that I am seeing.
This doens't necessarily mean any varation on such a finely balanced package as GM's LS6 motor..is not a great thing..
Its just extremely hard to give an educated opinion on the VARIOUS VARIATIONS because so many variatins Exist.
GM's planned package is practically bulletproof.
This doens't necessarily mean any varation on such a finely balanced package as GM's LS6 motor..is not a great thing..
Its just extremely hard to give an educated opinion on the VARIOUS VARIATIONS because so many variatins Exist.
GM's planned package is practically bulletproof.
V
VetteMan
Guest
Ya, OK
Guys,
I appreciate all the comments, that's why I came here. I know very little to nothing about engines. But when you use words like "nearly" pefrect and "possibly" fail, I worry. It's like being in limbo. If any of you feel that what I had done to this engine will compromise it in the least, or cause it to fail all together, I'd like to hear it. But, please be definite. If I'm in error, then out the cam comes. Paying to get it back out will cost less that reparing a failed engine, right? Is that easier or harder (in terms of my wallet) than putting the 02 heads on?
Appreciate your comments!
Mark (VetteMan)
Guys,
I appreciate all the comments, that's why I came here. I know very little to nothing about engines. But when you use words like "nearly" pefrect and "possibly" fail, I worry. It's like being in limbo. If any of you feel that what I had done to this engine will compromise it in the least, or cause it to fail all together, I'd like to hear it. But, please be definite. If I'm in error, then out the cam comes. Paying to get it back out will cost less that reparing a failed engine, right? Is that easier or harder (in terms of my wallet) than putting the 02 heads on?
Appreciate your comments!
Mark (VetteMan)
V
VetteMan
Guest
Old cam shot
Here's the stamped end of what's supposed to be my old cam. Can you tell by the markings if it's an 01 cam or not?
Here's the stamped end of what's supposed to be my old cam. Can you tell by the markings if it's an 01 cam or not?
V
VetteMan
Guest
New tube shot
Heres the label on the tube that the 02 cam supposedly came in. Does the stock number represent that of an 02 cam?
Heres the label on the tube that the 02 cam supposedly came in. Does the stock number represent that of an 02 cam?
c4c5specialist
Technical Advisor
HI there,
We are not trying to downplay your mods.
The big picture here, is that you are attempting to obtain 02 performance increases, without the total parts matching, that would be required for DURABILITY.
This is why, even if your dyno runs are within the 365/370 that 02 Zo6 is producing, you still may be dealing with reliability problems.
Just remember, reliability in mods is the true key to if they work or not.
This is what we are trying to explain. I will check on the numbers for the cams, but I am sure you have your 02 camshaft.
Allthebest, c4c5hb
We are not trying to downplay your mods.
The big picture here, is that you are attempting to obtain 02 performance increases, without the total parts matching, that would be required for DURABILITY.
This is why, even if your dyno runs are within the 365/370 that 02 Zo6 is producing, you still may be dealing with reliability problems.
Just remember, reliability in mods is the true key to if they work or not.
This is what we are trying to explain. I will check on the numbers for the cams, but I am sure you have your 02 camshaft.
Allthebest, c4c5hb
V
VetteMan
Guest
I understand
C4C5,
I understand and appreciate your comments/suggestions. I guess I'm not being clear. What I'm trying to ask is, can you give an estimate or synopsis of how much and were I've comprimised my durability? At the valve stem tips? Excessive cam lobe wear? In other words, If you had to pick a failure point in my engine, what would it be?
Thanks much for checking the numbers on the cam!
Mark
VetteMan
C4C5,
I understand and appreciate your comments/suggestions. I guess I'm not being clear. What I'm trying to ask is, can you give an estimate or synopsis of how much and were I've comprimised my durability? At the valve stem tips? Excessive cam lobe wear? In other words, If you had to pick a failure point in my engine, what would it be?
Thanks much for checking the numbers on the cam!
Mark
VetteMan
S
Steve92LT1
Guest
I'm not trying to start anything here, but am trying to look at it from another persons persepctive.
So let me get this straight. You changed the cam to an 02 stock cam and updated with better valve springs correct? That was all that was done to the motor?
Yeah the 02 cam "may" (this is debatable here) not act 100% exacltly like it would act in an 02 motor. But, it's not a timebomb. I was told that the heads were the same from 01-02 just they only changed the valves in them.
Think about this logically. It's a STOCK cam. Any STOCK cam is "puny" compared to an aftermarket setup. People are running stock "old school" LS1 type valves with aftermarket cams. You dont have to have sodium filled valves to do a cam change. As long as you have the supported springs and all you should be fine. It won't cause massive wear on a steel hydraulic roller cam, and it's not like you are running massive diameter triple valve springs with extreme high spring rates.
I'm not a certified vette tech, but I've been building engines since I was 16 (never an LS6) but I don't see a problem with this.
I'm trying to see where a fault would be in this setup as well, because I don't see one.
Just my humble opinion
Steve
So let me get this straight. You changed the cam to an 02 stock cam and updated with better valve springs correct? That was all that was done to the motor?
Yeah the 02 cam "may" (this is debatable here) not act 100% exacltly like it would act in an 02 motor. But, it's not a timebomb. I was told that the heads were the same from 01-02 just they only changed the valves in them.
Think about this logically. It's a STOCK cam. Any STOCK cam is "puny" compared to an aftermarket setup. People are running stock "old school" LS1 type valves with aftermarket cams. You dont have to have sodium filled valves to do a cam change. As long as you have the supported springs and all you should be fine. It won't cause massive wear on a steel hydraulic roller cam, and it's not like you are running massive diameter triple valve springs with extreme high spring rates.
I'm not a certified vette tech, but I've been building engines since I was 16 (never an LS6) but I don't see a problem with this.
I'm trying to see where a fault would be in this setup as well, because I don't see one.
Just my humble opinion
Steve
V
VetteMan
Guest
Yep
Steve,
Correct. All that was done to my 01 LS6 replacement engine was to add the 02 cam and higher rated valve springs to keep the valves clamped during high RPM. I've had it on the rev limiters several times since and it seemd to be ok. I did change the intake over to a dual neck with K&N filters and a larger carbon fiber bridge. When idleing it is noticeably louder/throatier now. As I said, I respect all opinions here but come fall at Carlisle, up on the barrels she goes. It's the only way I'll ever know what I've accomplished, if anything. If the engine fails, I'm going back to BMW's the real engine builders.
Thanks!
Mark
PS BTW C4C5, did you check those cam numbers?
Steve,
Correct. All that was done to my 01 LS6 replacement engine was to add the 02 cam and higher rated valve springs to keep the valves clamped during high RPM. I've had it on the rev limiters several times since and it seemd to be ok. I did change the intake over to a dual neck with K&N filters and a larger carbon fiber bridge. When idleing it is noticeably louder/throatier now. As I said, I respect all opinions here but come fall at Carlisle, up on the barrels she goes. It's the only way I'll ever know what I've accomplished, if anything. If the engine fails, I'm going back to BMW's the real engine builders.
Thanks!
Mark
PS BTW C4C5, did you check those cam numbers?
H
HOTMOTORSPORTS
Guest
Let me get this straight Mark.
You've been advised by a Master Corvette Tech (C4C5) that you should have gone further than just cam and springs in order to achieve the true 02 LS6 reliability and if the engine doesn't cut it, you're going to blame Chevrolet????
Chuck
You've been advised by a Master Corvette Tech (C4C5) that you should have gone further than just cam and springs in order to achieve the true 02 LS6 reliability and if the engine doesn't cut it, you're going to blame Chevrolet????
Chuck
c4c5specialist
Technical Advisor
HI there,
This number is the 02 camshaft.
As for the rest, I stand by my statements.
Allthebest, c4c5
This number is the 02 camshaft.
As for the rest, I stand by my statements.
Allthebest, c4c5
V
VetteMan
Guest
Oh My
Man you guys are tough!
Ok here we go again.
First C4C5, thank's for looking up the number. Was it the stock number on the tube you looked up or the numbers on the end of the cam?
Now, what I'm trying to say, AGAIN, is. Exactly WHAT have I done wrong. Will someone please step up to the plate and tell me??? If this engine is going to fail, tell me where and why!!!???
You all stand by what you've said, but do you?? WHAT reliability have I compromised? AT WHAT POINT WILL THE ENGINE FAIL?????????????? CAM???? RODS???? VALVE STEMS????
DON"T GO SOFT ON ME, GIVE ME AN EXACT ANSWER!!!!!????
I don't blame Chevy for anything, they make billions every day and don't care squat about me or my car. They've got my money.
Should I ask again then??? Like Sam Kennison?
TELL ME HOW IT'S GOING TO FAIL??? WHAT PARTS DO YOU SUSPECT WILL FAIL FIRST????
Mark
Man you guys are tough!
Ok here we go again.
First C4C5, thank's for looking up the number. Was it the stock number on the tube you looked up or the numbers on the end of the cam?
Now, what I'm trying to say, AGAIN, is. Exactly WHAT have I done wrong. Will someone please step up to the plate and tell me??? If this engine is going to fail, tell me where and why!!!???
You all stand by what you've said, but do you?? WHAT reliability have I compromised? AT WHAT POINT WILL THE ENGINE FAIL?????????????? CAM???? RODS???? VALVE STEMS????
DON"T GO SOFT ON ME, GIVE ME AN EXACT ANSWER!!!!!????
I don't blame Chevy for anything, they make billions every day and don't care squat about me or my car. They've got my money.
Should I ask again then??? Like Sam Kennison?
TELL ME HOW IT'S GOING TO FAIL??? WHAT PARTS DO YOU SUSPECT WILL FAIL FIRST????
Mark
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