SLP PerformacePac: Bad News
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SLP PerformacePac: Bad News The horsepower numbers for all SLP PerformancePacs were gained with 1.85-ratio rocker arms. The Pacs now come with 1.8-ratio rocker arms resulting in a significant loss of power over the "Guarateed Horsepower" number.
Also, the truck PerformancePacs claim up to 5% better fuel economy. This is also a false representation. Try it out. You'll see maybe 1-2% or no increase at all.
Also, the truck PerformancePacs claim up to 5% better fuel economy. This is also a false representation. Try it out. You'll see maybe 1-2% or no increase at all.
Originally Posted by JoeFranks
The Pacs now come with 1.8-ratio rocker arms resulting in a significant loss of power over the "Guarateed Horsepower" number.
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Teching In
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Originally Posted by Mike00FRC
I'm probably one of the last people to support SLP but how is 1.85 to 1.80 going to make a significant difference in power... what maybe 5 or so? Granted their numbers are already inflated. Now if this was not advertised, thats a different story.
Originally Posted by JoeFranks
Now advertisign has changed to 1.8 rockers to save money.
-T
Originally Posted by 2001CamaroGuy
WERD!!!!!!!!!!!!!!!!!!!!!!!!!!
JoeFranks, I'm glad you're "in the know", but I didn't need to be to realize SLP falsifies their HP claims excessively. They make crap except for their LM and subframes. Only two items that are worth a ****.
You're preaching to the choir on SLP, but I don't think coming on here talking to us like we're ignorant schoolboys that need to be educated will gain you much respect either.
Edit.....Guits, GREAT point, I always try to steer ppl clear of rockers. They're a shortcut to lift that shouldn't be taken as an initial step. Buy a cam instead.
... what's "the know"? where is it? can i be in too? anyone got directions? 
and they got the 41rwhp /40rwtq claims from there headers from there h/c 383 setup from what i read a long *** time ago. the point is its pretty much common knowledge that SLP's claims are nothing more then 
.
they dont make a bad product, i just hate seeing peope, especially newbs getting sucked into there marketing.
. they dont make a bad product, i just hate seeing peope, especially newbs getting sucked into there marketing.
Remember all advertising is indeed "ADVERTISING"! Thats what makes this site so great! You can save alot of money and time by weeding out the parts and vendors that aren't worth poop!!! Listen, ask questions and LEARN!
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From: At the office
Originally Posted by LASTLS1
Remember all advertising is indeed "ADVERTISING"!
- Flow benches. Many head companies inflate their flow #s. Flow benches and their #s can be manipulated, and frequently are.
- Dyno #s. Many companies inflate this # as well. Fairly easy by inflating tires, removing filter from intake lid, running no belt, running race gas to jack up timing, not smoothing dyno graphs, etc. SLP's header is an example with "up to 40hp gains." They don't tell you the 40hp gain occured on a whored out stroker motor running stock manifolds.
- Misleading advertising, specifically a certain vendor's LS6 "style" heads. They even advertise them as "LS6 heads," and not ls6 "style" heads in their banner here on ls1tech.com for like $1395. These aren't LS6 heads nor do they flow nearly as well as ported ls6 heads, but it's clever enough to trick ignornant people into buying them.
Originally Posted by verbs
That's what people just don't understand, and need to realize claims for making power should be taken with a grain of salt. There are a lot of shady practices by vendors to inflate their product. For example:
- Flow benches. Many head companies inflate their flow #s. Flow benches and their #s can be manipulated, and frequently are.
- Dyno #s. Many companies inflate this # as well. Fairly easy by inflating tires, removing filter from intake lid, running no belt, running race gas to jack up timing, not smoothing dyno graphs, etc. SLP's header is an example with "up to 40hp gains." They don't tell you the 40hp gain occured on a whored out stroker motor running stock manifolds.
- Misleading advertising, specifically a certain vendor's LS6 "style" heads. They even advertise them as "LS6 heads," and not ls6 "style" heads in their banner here on ls1tech.com for like $1395. These aren't LS6 heads nor do they flow nearly as well as ported ls6 heads, but it's clever enough to trick ignornant people into buying them.
but track numbers can be misleading as well if all the facts arent stated or understood. DA, raceweight, gears/stall, ect.
some people actually believe that all they need is T-rex, headers, and intake and they'll run 10.4 like rodney does. or 10.9 SI like Magnus did.
what it comes down to is that ever prevasive word: COMBO
TECH Addict
Joined: Dec 2001
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From: Bergen County, NJ
Well I'll be one of the other few to say SLP stuff isn't crap. Sure, some of their stuff is excellent and some is not so good, but that's true for many suppliers.
For those of us with SSs and Firehawks, it was their innovation and effort that brought the cars to life.
I don't know of too many people here "in the know" who bought their parts because of a performance gaurantee.
And BTW the gaurantee says the numbers "can be replicated" here's the quote:
WHY DON'T MY DYNO NUMBERS MATCH YOUR HORSEPOWER CLAIMS?
A: DYNAMOMETER RESULTS CAN BE INFLUENCED BY A NUMBER OF VARIABLES, INCLUDING ATMOSPHERIC CONDITIONS, OTHER MODIFICATIONS PERFORMED, AND THE TYPE AND CONDITION OF THE TESTING EQUIPMENT ITSELF. ALL OF OUR HORSEPOWER FIGURES WERE ACHIEVED ON OUR IN-HOUSE SUPERFLOW CHASSIS AND ENGINE DYNAMOMETERS AND HAVE PROVED REPLICABLE IN REAL-WORLD APPLICATIONS.
For those of us with SSs and Firehawks, it was their innovation and effort that brought the cars to life.
I don't know of too many people here "in the know" who bought their parts because of a performance gaurantee.
And BTW the gaurantee says the numbers "can be replicated" here's the quote:
WHY DON'T MY DYNO NUMBERS MATCH YOUR HORSEPOWER CLAIMS?
A: DYNAMOMETER RESULTS CAN BE INFLUENCED BY A NUMBER OF VARIABLES, INCLUDING ATMOSPHERIC CONDITIONS, OTHER MODIFICATIONS PERFORMED, AND THE TYPE AND CONDITION OF THE TESTING EQUIPMENT ITSELF. ALL OF OUR HORSEPOWER FIGURES WERE ACHIEVED ON OUR IN-HOUSE SUPERFLOW CHASSIS AND ENGINE DYNAMOMETERS AND HAVE PROVED REPLICABLE IN REAL-WORLD APPLICATIONS.
