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raceman14 · 12-24-2010, 05:24 PM

Dick,
Although not exactly the same...
I have been working on 604 GM crate engines for about 8 years now and have one permanently strapped to my Superflow chassis dyno.
The biggest easy gain is one of my oil filters if it will take a PF-35 type ( Std Chevy ), with gains in filtration media and oil flow my customers see 5-12 rwhp.

Spark plugs & wires are also a huge gain on almost any computer based engine, I use projected tips to advance the combustion timing and start the fuel burn earlier.

Fuel brand is also a huge gain ( as much as 12rwhp ), I have dyno tested almost every fuel known to man and some are almost as good as VP-MS109 $10Gal.

Fuel pressure is also a significant adjustment and depending on the engine and fuel system hitting the sweet spot is 20-30ft#

Air pressure in the tires is also worth 5-10 rwhp and more is always better as long as ride quality is OK.

I have a customer newsletter I send out with parts purchases, that includes a lot of information on how to make significant power gains.
I have some unique valvetrain mods and upgrades that also add significant bottom end torque without losing top end.

I have tested almost every part on my personal Shop Suburban an it is a
99 Suburban 350" Engine, 250,000miles that used to get about 12mpg and after about 5 years of playing around it is up to 17mpg. No matter what it still costs over $100 to fill the damn thing up.
I bought it from Hendrick with 25,000 miles in 2005 and run about 50K a year.

12-24-2010, 05:24 PM	#6
raceman14 Junior Member Join Date: Dec 2010 Posts: 3 Likes: 0 Liked 0 Times in 0 Posts	Re: HP for street Terrain Dick, Although not exactly the same... I have been working on 604 GM crate engines for about 8 years now and have one permanently strapped to my Superflow chassis dyno. The biggest easy gain is one of my oil filters if it will take a PF-35 type ( Std Chevy ), with gains in filtration media and oil flow my customers see 5-12 rwhp. Spark plugs & wires are also a huge gain on almost any computer based engine, I use projected tips to advance the combustion timing and start the fuel burn earlier. Fuel brand is also a huge gain ( as much as 12rwhp ), I have dyno tested almost every fuel known to man and some are almost as good as VP-MS109 $10Gal. Fuel pressure is also a significant adjustment and depending on the engine and fuel system hitting the sweet spot is 20-30ft# Air pressure in the tires is also worth 5-10 rwhp and more is always better as long as ride quality is OK. I have a customer newsletter I send out with parts purchases, that includes a lot of information on how to make significant power gains. I have some unique valvetrain mods and upgrades that also add significant bottom end torque without losing top end. I have tested almost every part on my personal Shop Suburban an it is a 99 Suburban 350" Engine, 250,000miles that used to get about 12mpg and after about 5 years of playing around it is up to 17mpg. No matter what it still costs over $100 to fill the damn thing up. I bought it from Hendrick with 25,000 miles in 2005 and run about 50K a year.