[DeTomaso] DeTomaso Digest, Vol 75, Issue 25-Stack Heights

[Ken Green]

There were a lot of BBC powered cars so it's very possible that you are correct.
 
Ken

--- On Mon, 10/25/10, Julian Kift <julian_kift at hotmail.com> wrote:


From: Julian Kift <julian_kift at hotmail.com>
Subject: RE: [DeTomaso] DeTomaso Digest, Vol 75, Issue 25-Stack Heights
To: kenn_green at yahoo.com, "De Tomaso List" <detomaso at realbig.com>, rcbsons1 at aol.com
Date: Monday, October 25, 2010, 11:42 AM




I bet it was a Big Block Chevy, much of that is an idiosyncrasy of the BBC port design, where the ports opening into the center of the cylinder work better than those that point into the cylinder wall. Cylinders 2, 3, 6 and 7 will have shorter stacks and require less spark advance and typically also run with a shorter spark plug than 1, 4, 5 and 8.
 
Julian 
 

 > Date: Mon, 25 Oct 2010 10:59:38 -0700
> From: kenn_green at yahoo.com
> To: detomaso at realbig.com; RCBSONS1 at aol.com
> Subject: Re: [DeTomaso] DeTomaso Digest, Vol 75, Issue 25-Stack Heights
> 
> I asked some of the guys working on a Group 7 car at Laguna Seca about the unequal length stacks some of the cars have, and they told me that was to spread out the power band by giving some of the cylinders greater VE at one RPM, and other cylinder greater VE at another RPM.  
>  
> Makes sense, but seems a little funky also because some cylinders would be a little rich and others a little lean if they are all getting the same amount of fuel.  
>  
> Looks cool.
>  
> Ken
> 
> --- On Mon, 10/25/10, RCBSONS1 at aol.com <RCBSONS1 at aol.com> wrote:
> 
> 
> From: RCBSONS1 at aol.com <RCBSONS1 at aol.com>
> Subject: Re: [DeTomaso] DeTomaso Digest, Vol 75, Issue 25-Stack Heights
> To: detomaso at realbig.com
> Date: Monday, October 25, 2010, 10:34 AM
> 
> 
> One of our Pantera owners has a Lola Can Am
> car... He had Lozano Brothers (winston cup guys)
> tweak his motor.. they called him after the first dyno
> pull and wanted to cut his stacks on the Kinsler injection
> The owner stated that is was a Vintage Can am car
> (the injection system is very expensive if you can get one)
> the owner told them that all the Can Am guys ran big stacks
> and Lozano told them they did not know anything back then(ha ha)
> He finally let them cut them 3/4 of an inch and they picked up
> 6 hp on a 650hp plus motor.. he told them that was good enough
> and not to cut any more... It is Mechanical Injection but on a 1500lb
> car it hits hard and revs soooo quick  :):)
> 
> Bob Benson #3 Black Pantera
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