The Stovebolt Site Forums The Shop Area Engine Shop Check out these power gain claims!

This is a claim made by an Ebay seller who's selling an Offy 4 barrel intake...

"54HP gain by installing this manifold and a Holley. 115HP gain with the addition of a cam, and 145+ with the addition of headers." :rolleyes:

I have a 500 cfm Edelbrock on the same manifold along with a cam and long headers on a 292, but nowhere near 145 HP gain he claims! All my gains don't even add up to the 54 HP improvement he claims you can get with JUST the addition of the manifold and carb! :p

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=36474&item=2454337470

Would a used manifold salesman lie?

I seen that yesterday and got a good laugh out of it! If it was just that easy.... Joe

The biggest single gain I have heard of was 16 hp by adding dual carbs on an offenhauser manifold. That was according to a dyno test of many components and configurations of components.
Somebody is yanking somebodies chain! :mad:

the edlebrock intake i put on my cadillac 500 was susposidly good for 40 hp.

I think part of the deal here is that if you think pecentages a few horses may be a big increase with a small engine. I'm sure that a good for barrel and high rise set up on a V8 gets a lot more horses than a good carb/intake set up on a stovebolt. The 16 hp bump I refered to above was on a 235. If you have a 100 hp engine 16 horses is a HUGE bump. I think Clifford has a combination of cam, intake, carb, and headers they claim will give a 25% increase. Okay, if you're working on a 150 horse 250, 25% is 37.5 horses, and that is a long way from what this ebay clown is claiming!
Bob

97 percent of HP numbers are made up on the spot.

I wrote him an email right after this subject was posted and asked how he gets his numbers. No answer yet.

ebay musta dropped his decimal points

Bill