The Peco turned out pretty much best on the dyno runs in Grassroots
Motorsport, Volume 20 Number 1. February 2003.
You should be able to get a reprint from their website.
The header and exhaust were tested together on a 78 with an HIF
conversion. It was worth 1 hp over a stock manifold and exhaust.
The stainless steel was a -1 hp.
The biggest gain over stock was ignition. A Lucas 45D with the
pertronix and 35 degrees of total advance get 4-5 hp.
Needles and changing type of oil in the dashpots did nothing.
Scott Bumpus wrote:
> Ok, I'm looking for exhaust experiences. I have a 1970 MGB and I'm looking
>to improve the exhaust. From what I've read, there isn't actually any gain
>from a new header except for ease of joining up a 2" exhaust system, is this
>right? If it isn't right are the LCB type the best and is there much
>difference between types, like Peco and Mani-flow...?
>
> As far as exhaust goes, I'm looking for something that is not too noisy but
>is a definite performance boost. Any recommendations here? I'm thinking Peco
>or Ansa and it seems Peco is cheaper.
>
> Thank you,
>
> Scott
|