boostin' ?s

Brandon Rogers brogers at
Fri Apr 4 07:32:27 PDT 2008

Plenty of people use the 7A cam(s) (exhaust I know - not sure about intake)
and make good power - IIRC dyno result show top end increases but low to mid
decreases.  To convert the 7A you will want (need) a compression dropping
head gasket.  Tons of info on Motorgeek.


-----Original Message-----
From: 200q20v-bounces at [mailto:200q20v-bounces at] On
Behalf Of Bernie Benz
Sent: Thursday, April 03, 2008 5:19 PM
To: Tom Egbert
Cc: 200q20V mailing list
Subject: Re: boostin' ?s

On Apr 3, 2008, at 4:04 PM, Tom Egbert wrote:

> Tom,
> How is your son planning to mod the 7A's valve timing to reduce or 
> eliminate the NA's valve overlap, such that the turbo can't just blow 
> thru?
> Bernie
> I am not sure, but a spare 3-b head modded for coolant flow should
> take care of that. I am more interested in my 200 20v getting 24  
> pounds of boost reliably.
>             Tom
The 3B and AAN heads have the 4 outlet external coolant manifold. The  
7A does not, just a single outlet.
Ask him to respond with his valve timing mod plans.

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