BIG MOTOR with stock 2002 Camaro tune?
01-19-2007, 07:04 AM
#1
BIG MOTOR with stock 2002 Camaro tune? Would it possible to drop in a big cubic inch motor that will run perfectly using my 2002 OEM tune. It seems if you design a cam that would keep engine vacuum in line with stock it would work. If I wanted to I could simply use a hand held tuner to do some simple tuning. What is the perfect combination to make this work?
Here's my future EDITED wish list:
427 using GM's new iron block.
243 HEADS and LS6 Intake and Throttle body
STOCK TUNE
Which Cam ????????????
Here's my future EDITED wish list:
427 using GM's new iron block.
243 HEADS and LS6 Intake and Throttle body
STOCK TUNE
Which Cam ????????????
Last edited by gollum; 01-19-2007 at 01:30 PM.
01-19-2007, 11:12 AM
#6
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Dude, no, not even close it will run like complete **** if it even runs at all and will be WAY DOWN on power and you risk grenading the motor also. Do it right and get it dyno tuned by a profesional for $400 for crying out loud!! 
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01-19-2007, 01:17 PM
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Originally Posted by gollum
Would it possible to drop in a big cubic inch motor that will run perfectly using my 2002 OEM tune. It seems if you design a cam that would keep engine vacuum in line with stock it would work. If I wanted to I could simply use a hand held tuner to do some simple tuning. What is the perfect combination to make this work?
Here's my future wish list:
427 using GM's new iron block.
LS7 or L92 heads
STOCK TUNE
Cam ????????????
Here's my future wish list:
427 using GM's new iron block.
LS7 or L92 heads
STOCK TUNE
Cam ????????????
01-19-2007, 01:28 PM
#10
Originally Posted by Stang's Bane
I would have to think at the very least the fuel values would have to be bumped way up?
01-19-2007, 01:34 PM
#11
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Originally Posted by gollum
The above quote makes sense because of the higher flowing and larger intake runners of the L92/LS7 heads. But what if I use stock 243 castings with my current LS6 intake and throttle body. Fuel values should not have to be changed. I am just adding more cubic inches to a stock 2002 SS Camaro. Everything else would be stock, even the cast iron exhaust manifolds. What grind cam will make this work?
01-19-2007, 02:02 PM
#12
Originally Posted by gollum
The above quote makes sense because of the higher flowing and larger intake runners of the L92/LS7 heads. But what if I use stock 243 castings with my current LS6 intake and throttle body. Fuel values should not have to be changed. I am just adding more cubic inches to a stock 2002 SS Camaro. Everything else would be stock, even the cast iron exhaust manifolds. What grind cam will make this work?
IMHO if you did grind a cam to make this work, it would be much SMALLER than a stock LS1 cam.
01-19-2007, 02:06 PM
#13
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you would have 80 more cubic inches to feed fuel and air..so yeah,fueling would have to be increased,especially at the upper rpm range..
Last edited by 66deuce; 01-19-2007 at 09:50 PM.
01-19-2007, 03:09 PM
#14
Originally Posted by Stang's Bane
If you didn't add anymore fuel, then you wouldn't make any more power. To make more power you have to burn more fuel. The extra cubic inches would be a complete waste of money.
IMHO if you did grind a cam to make this work, it would be much SMALLER than a stock LS1 cam.
IMHO if you did grind a cam to make this work, it would be much SMALLER than a stock LS1 cam.
I also think the cam would have to be slightly larger than stock to do this, much like 212/220 duration @.050, 114 lsa, 520 lift, just to keep engine vacuum equal with the stock LS1 so to work with the stock tune. A smaller than stock cam would create TOO MUCH vacuum I think. Would too much engine vacuum cause a problem for the stock tune?
Last edited by gollum; 01-19-2007 at 04:41 PM.
01-19-2007, 03:29 PM
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I don't understand why anyone would want to do that, stoke tune + 427CI WHY?!?!
I agree with MTI \/
I agree with MTI \/
Originally Posted by MTI 427 C5 Roadster
Dude, no, not even close it will run like complete **** if it even runs at all and will be WAY DOWN on power and you risk grenading the motor also. Do it right and get it dyno tuned by a profesional for $400 for crying out loud!!
01-19-2007, 03:42 PM
#17
The short story - don't do it.
Don't cheap out on this one. If you want a stock tune, keep the stock motor. If you are paying the amount of money a big inch motor costs, you can CERTAINLY afford to have the damn thing tuned correctly. I don't get why people insist on cutting corners on something so important. It'd be kinda like buying a huge motor, and using a straw that you blow in yourself to pressurize the fuel system because you didn't want to spend the money on a fuel pump. The tune is just as critical as a fuel pump would be to the engine's operation and life expectancy.
The last thing I'd want to do is chance blowing a motor that cost so much...
Don't cheap out on this one. If you want a stock tune, keep the stock motor. If you are paying the amount of money a big inch motor costs, you can CERTAINLY afford to have the damn thing tuned correctly. I don't get why people insist on cutting corners on something so important. It'd be kinda like buying a huge motor, and using a straw that you blow in yourself to pressurize the fuel system because you didn't want to spend the money on a fuel pump. The tune is just as critical as a fuel pump would be to the engine's operation and life expectancy.
The last thing I'd want to do is chance blowing a motor that cost so much...
01-19-2007, 03:45 PM
#18
Originally Posted by wizardstar
I don't understand why anyone would want to do that, stoke tune + 427CI WHY?!?!
I agree with MTI \/
I agree with MTI \/
01-19-2007, 03:55 PM
#19
Originally Posted by gollum
Just trying to come up with a simple low RPM big motor combination that I know will make lots more torque than stock and have verygood drivability using my quiet running OEM 3.42 ring and pinion gear. I can always change over at a latter date to a bigger cammed, higher revving beast.
01-19-2007, 04:09 PM
#20
All I am asking is "would it be possible". This idea would not be be risky at all if air/fuel ratio and spark advance are within limits. A drop in large engine combination that requires no tuning sounds like a vergood idea to me. It may or may not work but it is a good idea any way you look at it.
Is it possible KATECH?
Is it possible KATECH?