RE: inlet manifold

[Terry Rudd]

Title: RE: inlet manifold

Ross,

 

Tough one to call that - economy wise probably not around town but there wouldn't be much in it on the freeway and power wise the Weber has the edge till around 70 mph and the Hitachi's come on strong after that. The L20B in stock as a rock form is actually very well suited to twin Hitachi's (L18SSS type) and my best guess is it's got something to do with the flow characteristics of the U67 head - on a stock L18 or SSS the 32/36 will kill the twins from go to flat out (non event usually) as 20 years ago we used these engines in 1600's many times over and none of the stock L18 engines with Hitachi's ever came close to one with nothing else changed other than a 32/36 and the little Weber generally gave better cruising fuel economy to boot - and you didn't have to balance the things every second weekend and the Weber never leaked fuel everywhere. You've probably guess that I'm not a strong fan of the Hitachi side draft.

 

regards

Terry

 

 

 -----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Ross Goddard
Sent: Wednesday, 31 July 2002 12:28 PM
To: [EMAIL PROTECTED]
Subject: RE: inlet manifold

Hey guys

Would one of these webers give better power/economy than a pair of SUs? Running on a L20B?

RG

----------
From:   Kristian Walsham
Reply To:       [EMAIL PROTECTED]
Sent:   Wednesday, July 31, 2002 12:16 PM
To:     [EMAIL PROTECTED]
Subject:        Re: inlet manifold

Just a quick one Terry, is the standard jetting on the 32/36DGAV on the rich side for the L18SSS considering it came from a two litre Cortina?


Kris.

----- Original Message -----
From: Terry Rudd
To: [EMAIL PROTECTED]
Sent: Tuesday, July 30, 2002 9:53 PM
Subject: RE: inlet manifold

Kris,
 
S1 Bluebird has about the largest runners and base holes of any of the L4 downdraft manis and a S2 Bluey could be the same but I don't know anything much about the technical specs of them. There isn't much to be gained simply by fitting a larger runner manifold unless the head ports are at least the same size, some A87 heads have 38mm ports. There are a few holes to weld up if you use a L20B mani as they have EGR etc - not hard to do though.


Usually a 32/36 will run well with 12-14 degrees of initial advance on the Bluey S2 dizzy with vac advance connected and 96-98 octane so if it's not detonating then it's pretty close to where the engine likes. Usually going up hill at around 4000 rpm at WOT in 3rd on a 40 degree day will sort it out.


regards
Terry
 
 
 
 -----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Kristian Walsham
Sent: Tuesday, 30 July 2002 9:58 AM
To: [EMAIL PROTECTED]
Subject: inlet manifold





Hi all,
       I have a 32/36DGAV on a L16 manifold on my L18SSS engine and seems too restrictive. I believe there is manifold from an L20B engine that is better suited. The head is an A87 but i don`t know if it is the larger or smaller port head.   Can someone tell me which car this manifold would be from please.

    Also, i have the elec. dizzy and was wondering if i set the timing at 14 deg BTDC will this provide too much total advance with the vac advance hooked up? The car doesn`t ping though.  I have two timing marks on the front pulley, one lines up with 0TDC and the other lines up with 15Deg BTDC is this the correct way to set up the timing? I have never seen this before on a factory engine.

          I use Caltex Vortex Premium 96 octane.
 Sorry for rambling on.
Much appriecated,  
                   Kris.

--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/membersozdat@datascribe.com.au/
---------------------------------------------------------------------




--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/membersozdat@datascribe.com.au/
---------------------------------------------------------------------




--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/membersozdat@datascribe.com.au/
---------------------------------------------------------------------

--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/membersozdat@datascribe.com.au/
---------------------------------------------------------------------

--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/membersozdat@datascribe.com.au/
---------------------------------------------------------------------