[DeTomaso] Turkey Trays

[Larry - Ohio Time Corp.]

Hi Larry

Yes, this is how I also remember them working. The flapper valves would work 
fine till they went through there first winter in Cleveland, come spring 
they would rust closed and the cars would run like crap with all that back 
pressure.

Good to have another Larry posting. Where is Young Larry?

Larry (need more Larry's) - Cleveland


----- Original Message ----- 
From: "Larry Weston" <lplugw at hotmail.com>
To: <DeTomaso at realbig.com>
Sent: Wednesday, March 28, 2007 7:55 AM
Subject: [DeTomaso] Turkey Trays


> As I rememeber the exhaust crossover in an intake manifold was one piece 
> of
> a two part system to heat the incoming air charge for better low speed
> drivability. The other piece was the "Heat Riser",
> which was a flapper valve in the outlet end of a cast iron exhaust 
> manifold,
> controlled by a bimetallic spring.
>
> When the exhaust manifold was cold the flapper would be in the closed
> position, forcing exhaust gases up through the intake manifold crossover
> passage and out the opposite side exhaust manifold.
> The flow of the hot gases would warm the intake until the engine warmed up
> and the bimetallic element opened the flapper and the exhaust flowed out
> through the exhaust pipe. Flow through the intake manifold would 
> essentially
> cease because there is no more pressure differential pushing it through 
> the
> restrictive crossover passage.
>
> With no heat riser valve I would say what liitle exhaust gas that travels
> through the crossover passage is probably cooled by the incoming air and
> evaporating gasoline and never retains enough heat to burn/bake oil on the
> bottomside of the manifold.
>
> I'm in the middle of changing my intake. Considering the comment that 
> metal
> turkey tray gaskets can actually dent an aluminum manifold, I'm prone to
> going to the composite gaskets with no tray.
>
> Any comments?
>
> Thanks,
>
> Larry
>
> _________________________________________________________________
> 5.5%* 30 year fixed mortgage rate. Good credit refinance. Up to 5 free
> quotes - *Terms
> https://www2.nextag.com/goto.jsp?product=100000035&url=%2fst.jsp&tm=y&search=mortgage_text_links_88_h2a5d&s=4056&p=5117&disc=y&vers=910
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
>
> DeTomaso mailing list
> DeTomaso at list.realbig.com
> http://list.realbig.com/mailman/listinfo/detomaso
>
>