For Those Wanting To Port Your Heads!!!

When the guy said that dyno numbers DO NOT MEAN ANYTHING, or flow numbers DO NOT MEAN anything, to me, that means he cant make the BIG NUMBERS so that is why he says they dont mean anything. I have been an engine builder for over 40 years now, and believe me, the more your head flows on the intake, the more HP your engine can make. An engine with less HP and more velocity will NEVER beat an engine that has more HP. SIMPLE. This guy is confusing street driveability with all out performance. The only thing small ports are good for is gas miledge and part throttle driving. This is just like the guy who cant make big HP, so he says that torque is more important than HP. BUT it is not and NEVER will be. SORRY.

JOE SHERMAN RACING ENGINES

Originally Posted by BIGJOE

When the guy said that dyno numbers DO NOT MEAN ANYTHING, or flow numbers DO NOT MEAN anything, to me, that means he cant make the BIG NUMBERS so that is why he says they dont mean anything. I have been an engine builder for over 40 years now, and believe me, the more your head flows on the intake, the more HP your engine can make. An engine with less HP and more velocity will NEVER beat an engine that has more HP. SIMPLE. This guy is confusing street driveability with all out performance. The only thing small ports are good for is gas miledge and part throttle driving. This is just like the guy who cant make big HP, so he says that torque is more important than HP. BUT it is not and NEVER will be. SORRY.

JOE SHERMAN RACING ENGINES

WE ARE TALKING " HOME PORT JOBS" NOT ALL OUT PRO RACING. IF THEY HAD THE MONEY FOR PRO RACING, THEY WOULDNT BE PORTING THE HEADS IN THE GARAGE! TQ. MY FRIEND IS WHAT MOVES YOU TO 5250 HP IS WHAT GOES FROM THERE... JUST BECAUSE YOU HAVE 40YEARS UNDER YOUR BELT , DOESNT MEAN ITS RIGHT...COULD YOU HAVE BEEN DOING IT WRONG FOR 40 YEARS? MY GRANDFATHER STILL USES AN ABACUS...I HAVE A COMPUTER. THINGS CHANGE

An engine with less HP and more velocity will NEVER beat an engine that has more HP. SIMPLE


YOU ARE SO WRONG HERE TOO.....

243HP 305TQ BEATS 270HP 300TQ

BOTH CARS ARE FOX BODY COUPE

MINE IS BONE STOCK WITH HEAD WORK HEADERS AND CAM... 5 SPEED W/3.73 OUT BACK 243HP 305TQ

HIS IS CAI,73MM MASS AIR METER,70 MM TB, COBRA INTAKE, GT40 HEADS, B CAM, FULL EXHAUST W X PIPE, MSD IGNITION AND EVERY BOLT ON YOU CAN HAVE ..5 SPEED W/ 3.73 OUT BACK 270HP 300TQ

MY CAR WALKS HIS CAR 3-4 CAR LENGTHS BURNING THE TIRES, NO JOKE

Hmmm, interesting thread...

I Dont Want To Get Into A Pissing Match Here! This Is For The Guys That Want To Do Some Port Work In The Garage At Home..... If You Want To Have The Same Setup As Everyone Else Has Then You Should Go Buy Some Twisted Wedge Heads And A E Cam Or A Stage 1 Trick Flow Cam....or Spend Gobs Of Money Getting Them Ported By The Pros... Or You Can Save Yourself Some Money And Port Your E7 And Beat Them And Feel Good That You Didnt Have To Buy Your Hp....you Made It!

Originally Posted by BIGJOE

When the guy said that dyno numbers DO NOT MEAN ANYTHING, or flow numbers DO NOT MEAN anything, to me, that means he cant make the BIG NUMBERS so that is why he says they dont mean anything. I have been an engine builder for over 40 years now, and believe me, the more your head flows on the intake, the more HP your engine can make. An engine with less HP and more velocity will NEVER beat an engine that has more HP. SIMPLE. This guy is confusing street driveability with all out performance. The only thing small ports are good for is gas miledge and part throttle driving. This is just like the guy who cant make big HP, so he says that torque is more important than HP. BUT it is not and NEVER will be. SORRY.

JOE SHERMAN RACING ENGINES

THINK ABOUT THIS TOO:

There is so much more to a head that makes it a winner than simply making the ports bigger. The shape of the port is just as important as its size. Perhaps even more important. Air speed is negatively impacted by a port with sharp and abrupt turns. Nobody needs to look any further than the Ford 351 Cleveland with huge port heads and crazy Dog Leg exhaust ports to know what a flop it was.

Since air speed is ultra critical in a Naturaly Aspirated engine, using wisdom in chosing a head by paying attention to average flow numbers throughout the entire valve lift curve as opposed to peak lift flow numbers, will prove sucessful.

Simply running the biggest port and valve size will most likely do everything but help the car accelerate at any RPM other than wrung-out/too late. As a result of poor head choice, many times a small cam is thrown into the mix to help low and mid-range power.


On the flip side, a smaller port and valve size is more forgiving of bigger cams.

Buying the best engineerd head with the smoothest turns and deepest valve pockets as opposed to the one with the biggest holes in it will be the winner every time.

You know, I don't port heads any more unless they are my own and I just do the port match and clean up without hogging anything out. I drive my cars on the street not a race track. That doesn't mean that I can't do a professional racing port job. I have done them and used to have my own flow bench to help. For the guy in his garage those numbers don't mean much because they will never push their engines to 8000 or more RPMs. To the professional those numbers mean EVERYTHING! If you can't produce HP then you can't sell your work. HP and torque are related - both are necessary to make a racing engine. Your torque ends before your HP does so you need HP to take over after the torque drops off. An engine that produces 800 ft lbs of torque but won't turn fast enough to make 900 HP won't win a race. If torque was all it took there would be a lot more diesels winning races! HP is speed and Torque is acceleration - YOU NEED BOTH.
Gentlemen, let us notice that we have seen both sides of the auto enthusiast game here. We have the rodders and the racers. Their needs are different. They do what they do to match their needs. We can each learn from each other - but rodders, you can learn a lot from the racers and fit it to your needs.
Nobody gets 40 years of experience doing it wrong..........

For the guy in his garage those numbers don't mean much because they will never push their engines to 8000 or more RPMs. To the professional those numbers mean EVERYTHING!..


THE FORUM IS CALLED " HOME PORTING CYLINDER HEADS"

NOT "PROFESSIONAL NASCAR NHRA GOT 1 MILLION DOLLARS TO SPEND PORTING CYLINDER HEADS"

First of all, from a driver's perspective, torque, to use the vernacular, RULES :-). Any given car, in any given gear, will accelerate at a rate that *exactly* matches its torque curve (allowing for increased air and rolling resistance as speeds climb). Another way of saying this is that a car will accelerate hardest at its torque peak in any given gear, and will not accelerate as hard below that peak, or above it. Torque is the only thing that a driver feels, and horsepower is just sort of an esoteric measurement in that context. 300 foot pounds of torque will accelerate you just as hard at 2000 rpm as it would if you were making that torque at 4000 rpm in the same gear, yet, per the formula, the horsepower would be *double* at 4000 rpm. Therefore, horsepower isn't particularly meaningful from a driver's perspective, and the two numbers only get friendly at 5252 rpm, where horsepower and torque always come out the same

remember this number 5252...^^^^ stock 302 are good to lets say 5600-5800.and the computer will shut off fuel at 6250.fact..i dont see the justification in hp for 1000 rpm....from 0rpm- 5252rpm torque rules, from5253 to 6250 hp rules i dont shift my car at 6k its not making power, i shift at 5500 when the tq falls off, so the next gear will be in the peak torque, not peak hp

BHAM,
Where does your engine get it's peak torque? Mine gets it at 3200 RPM according to the cam spec sheet. I can accelerate to 6000 RPM because the amount of torque per minute is high enough to allow me to do so. That is what the HP is - torque per minute. One HP is 33000 ft lbs of torque per minute. HP is a measurement of the work done. Torque is a measurement of potential.
If I have a car with 200 pounds of drag measured at a 12 inch radius from the axle center (besides throwing it away) and I have an engine with 200 ft lbs of torque it won't go anywhere. The potential and the load are the same. In that case the horsepower being delivered is the same as being consumed so the net HP is zero.
Like I said you have to have both.