combo/assembly info

[grumpyvette]

just a bit of info!

 

I have NEVER seen an intake that had ports exactly match the heads I was useing,THEY ALL require at least minor port matching, and while there are some that are better that others in this respect, I think your fooling yourself if you think you can bolt any intake to a set of cylinder heads and expect that all the port entrances and water ports will be exact matchs. Ill agree that Ive got some really low quality castings from some sources at times, yet they frequently are also well done, they vary a good deal from year to year and model to model, thats where the guy assembling the engine comes into play his job is to match, and fit and adjust the parts so they work correctly as a well thought out combo, not a group of parts thrown together and expected to work, right out of the box,its fairly easy to pick up an aditional 20hp-60hp just doing easy but time consuming things like port matching the intakes, porting plenums and runners, useing carb spacers,pocket porting the heads,back cutting valves,useing differant ratio rockers, adjusting rocker geometry,fitting custom length header collectors, correctly clearance/ballance or finish the parts,add windage screens and other minor tweaks to the combo. WHILE NO ONE MODIFICATION SHOWS A HUGE IMPROVEMENT BY ITSELF , the COMBO HAS A VERY NOTICABLE EFFECT ON THE TOTAL POWER! the cost of parts that that work was pre-done by the manufacturers to match YOUR EXACT COMBO, would be cost prohibitive to most rodders,

THATS WHY THE GUYS WHO TAKE THE TIME TO UNDERSTAND THE CONCEPTS OF WHATS HAPPENING IN THE ENGINE AND DO THE TWEAKS TO IMPROVE THE EFFICIENCY TEND TO WIN THE RACES,

the bottom line is that a correctly built combo requires carefully matched parts designed to work at the SAME HP and RPM levels,MISS-MATCHED COMBOS DON,T TEND TO REACH THIER POTENTIAL,and BADLY MISS-MATCHED PARTS WILL TEND TO WORK AGAIST EACH OTHER AND COST YOU HP!

FACTORY PRODUCED CARS AND PARTS ,DO NOT HAVE MAX PERFORMANCE AS THE MAIN GOAL, LOW PRODUCTION COST,EASE OF ASSEMBLY,EMISSIONS TESTING,CUSTOMER COMFORT, LOW PRICE, RELIABILITY all are HIGHER PRIORITIES!, CAMS AND GEARING TAKE AN ESPECIALLY HARD HIT ,AS MILEAGE, EMISSIONS,AND NOISE LEVELS FAR EXCEED, RAW PERFORMANCE AS GOAL IN MOST CARS

 

port matching ALONE is rarely worth more than a few hp,simply because the ports are rarely more than 1/8" off matching and frequently even less, that does not make the mod worthless, but port matching combined with a pocket port on the cylinder heads and a back cut on the valves to increase low lift flow it becomes a PART of the whole mod and as such helps flow, the combo of mods DOES help and IVE seen just those mods give 15hp-25hp(mostly at peak rpms)