Apr 18 2009
Port Matching Intake Manifolds on Chevy 5.7l Intake Manifold
There are many ways to get extra power from an engine, but if you want the engine to rev faster, you will need to make sure you get port matching intake manifolds right. Because V-8s are mass -produced, and the manifold fits into the V between the two heads, it is not easy to get the manifold and ports in the head lined up correctly.
With the ports lined up correctly and smoothed out, you can get more power from most engines including the Chevy 5.7l intake manifold and ls3 corvette intake manifold. This is particularly important if you have skimmed the head to increase compression ratio because when you skim the head, it sits lower on the block, and the manifold will not line up correctly.
The solution is to mark the heads with marking paste, put the manifold on and check for alignment. Then you grind the head or manifold to get them aligning correctly. This will give more power.
Of course if you build a manifold from manifold fabrication parts you will also need to align the manifold correctly. This is particularly important on high performance engines, so be careful with the ls3 corvette intake manifold and other hot Chevies like the Chevy 5.7l intake manifold. Youcan also gain a few horsepower with some minor modifications.
Gain 5 Horsepower This Weekend, For Practically Nothing
What if I told you that you can gain 5 horsepower this weekend, for less than $100? Or, what if I told you that you could gain 5 horsepower this weekend, for less than $20?
I bet you’d be interested eh?
Well, the good news is, I’m going to tell you how to gain 5 horsepower this weekend for $0-15 spent. Sound too good to be true? Well, read on!
1) Increase the H2O ratio in your coolant – if it weren’t for corrosion and freezing concerns, automotive makers would use pure water. Water cools much better than coolant any day of the week, and a cooler engine is a better performer.
Instead of half and half, try 40/60. DO NOT use pure water, As this may cause premature corrosion and that can be no fun at all to clean up. You may also try water wetter to further enhance this effect.
2) Index your spark plugs – this is an age old trick that is good for about 1 extra pony. The idea here is to "aim" the open end of the spark plug terminal (the gap) towards the intake side of the head. In order to accomplish this, simply mark on the plug a small line to indicate where this gap is, and install the plug as normal.
Try to line up the line with the intake side as best as you can. It may require buying 2 sets of spark plugs in order to do this, but hopefully you’ll be able to do this the first time. Be careful with aluminum heads not to over tighten, as that could lead to a costly repair.
3) Relocate IAT Sensor – This is a very simple modification that will work on a great deal of fuel injected vehicles. The IAT sensor (“Intake Air Temperature”) tells the computer how hot or cold the incoming air is. The computer will then adjust the amount of fuel being injected, as well as make minor adjustments to timing based on that reading.
The problem is that in many vehicles, the IAT sensor is located in the intake manifold, near the cylinder head. Therefore the air that the IAT sensor “reads” is much hotter than the air, say, in the intake arm. The idea with this mod, is to relocate the sensor to the intake arm. Use JB Weld or similar to patch up the old port for the sensor.
This will cause the computer to believe that incoming air is slightly cooler, causing it to inject more fuel and advance the timing a tad.
4) Synthetic Oil – This is guaranteed to pick up 1-2 horsepower, as multiple dynos over the years have proved this fact. Simply by switching to a true synthetic oil this weekend you can reduce the friction in your engine, improving efficiency, and therefore going faster.
5) Insulate Fuel Lines – When your fuel lines travel through the engine bay they heat up. However, cooler fuel produces more power for more reasons than just cooling down the intake charge–although that certainly helps things! So, to improve power output, simply purchase some refrigerator/air conditioning insulation and wrap the fuel lines with the insulation. While you’re at it, you may wish to go ahead and do this to the intake arm as well for even more power.
by:
Want more information like this?
Check out The Definitive Guide to Low-Buck Performance: Best Kept Secrets of Top Racers
Click here: http://www.ultimateresourceguides.com/low-buck/index2.html
About The Author
Nathan Morris is a respected author of multiple technical automotive refrence guides and articles. He currently writes for and runs UltimateResourceGuides.com
nathan@ultimateresourceguides.com
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