[DeTomaso] DeTomaso Digest, Vol 109, Issue 5

[Ed Mendez]

Looks like the CHI are 2.07" intake and 1.61" exhaust. CHI dual plane air gap 4150 manifold, I ordered these heads and manifold right from CHI in Melbourne, it is what they recommended. They are also custom making the chambers in 65cc CNC, and installing the Ferrea 6000 swirl polished valves and hydraulic roller springs for all the same price as their standard heads.

Crank is Scat 3.75 4340 forged and Calles lightened 6.125" 4340 H beams, carb is 750cfm Holley double pumper, I also have a 180 degree exhaust by the Buyers brothers. Steel billet flywheel 157 tooth, and Romac lightweight balancer. MSD billet distro with 6AL-2. I am hoping that the 10.5" Centerforce dual friction will be enough clutch.

Thanks Ed 

Sent from my iPad

On Jul 5, 2013, at 12:00, detomaso-request at poca.com wrote:

> Message: 15
> Date: Thu, 4 Jul 2013 20:40:47 -0500
> From: Daniel C Jones <daniel.c.jones2 at gmail.com>
> Subject: Re: [DeTomaso] Cam selection for 383 stroker
> To: POCA list <detomaso at poca.com>
> Message-ID:
>   <CAD=EzWV05zuUobK=jgkm5csxDQRdjw3piHKcqX97yTGFW3GMTQ at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
>> Maybe a custom ground if so what specs?
> 
> I can model your engine in Dynomation and design an custom cam.
> I can also compare the results to both of the Crane cams. It takes me
> about a day to do a thorough job of it.  I do ask for a small donation
> to the Cleveland dyno project fund.  BTW, we've dyno tested the Crane
> hydraulic roller lobes in 351C stroker engines and much prefer the
> Bullet lobes we now use.  500 HP should not be a problem but you
> will need to pay attention to some details if you want to turn a 351C
> hydraulic roller valve train to 7000 RPM.
> 
> CHI has the 208cc flow numbers on their website but they don't list
> the intake and exhaust valve diameters.  Are they 2.19"/1.65" or do
> they use  a smaller diameter intake valve?  The CHI advertised flow
> numbers have been a bit optimistic when flowed on our flow bench
> but I can adjust for that.  The CHI single plane has always tested well.
> Whose crankshaft are you using and what will be your rod length?
> Also, what is the CFM rating of your carb?
> 
> Dan Jones



On Jul 3, 2013, at 10:33, Ed Mendez <edducati at mac.com> wrote:

> Can anyone recommend a good Hydraulic roller cam for a 383 351C stroker going into my Pantera?
> 
> 351C 4-bolt
> All forged internals, 3.75 stroke, 6.125 rods, flat top pistons, internally balanced.
> CHI 3V 208cc and 65cc chambers and 208cc manifold, Holley 750. Should be around 11:1
> 
> I am looking around 500hp power 2800-7000.
> 
> I was told by CHI that Crane 529801 or 529811 would be good choices something with 236 duration at .050
> 
> Maybe a custom ground if so what specs?
> 
> Thanks, Ed