ok then that's where gears and a converter come it to play...but that's what I was sayin b4 unless your committed to improve every where you wont get what you want and if u do commit big money
Again, yes and no.
Porting out an intake or heads is not a simple process. “Gasket matching” is, but actual porting is not.
If you mess up the port you can negatively affect everything from port velocity and cylinder filling to turbulence and even inadvertently adding restrictions. Something as simple as wall finish makes a significant difference and even that is differnt depending on the engine (ie: wet or dry manifold, etc).
If you get it wrong enough, it won’t make a difference on what you do with gearing, stall speeds or cam profiles. If the cylinder filling is buggered, you can’t make it back. You either have to fill it (ie: welding, epoxy, etc) and re-port or chuck it out and start over.
The scary part of it is that it doesn’t take much to get it wrong to the point where you turn the engine into a “dog”. Make a port too big, change the profile too much, raise a runner roof too much or even smooth out a bump or casting thats there for a purpose and....
bingo; poorly flowing port and a dog until you spin the living bejesus out of it (and even that might not make a diff).
Toss in a TPI manifold and it gets 10x worse. They are very easy to mess up because of thier tuned “ram effect” and the fact that GM left virtually no room anywhere in the casting to hog out. They were on a weight savings kick chasing MPG’s and it showes up in every part on the car. The intake didn’t escape the accountants pen any more than the rest of the car did.
For example: there’s no way to significantly improve the lower intake manifold unless you get a couple
pounds of Aluminum welded to the runner roofes and raise the injector bungs. Which means you need to rework the fuel rails and the feed lines. Then you have to get into the ecm to make sure your VE and BLM tables haven’t gone out the window.
We haven’t even gotten into the problems you’ll run into with the connecting pipes and upper plenum...
Once you find out how the engine runs after “porting” the lower, upper and connecting tubes, you can get into matching cams, TC and gears....although you
CAN do calculations before hand and chnage out the cam, gear, TV, etc and hope your math matches reality (it almost never does, close, but not match).
Porting isn’t a simple thing. It’s a big change that can make it stronger....or it can kill it completely....