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Re: Supercharging an MGB

To: eric@erickson.on.net
Subject: Re: Supercharging an MGB
From: gofastmg@juno.com (Rick Morrison)
Date: Mon, 23 Nov 1998 22:44:40 EST
On Tue, 24 Nov 1998 03:19:00 +0000 Eric Erickson <eric@erickson.on.net>
writes:
>Mike Gigante wrote:
>> 
>> High Performance Products (Hans Pedersen) has a modern supercharger
>> kit for a B (and A series as well).
>> 
>
>That's done it!
>
>I am planning a leisurely drive across from Adelaide to Melbourne soon
>(via the coast which must make it close to 800 kilometres or so?) so 
>it
>looks like I should look this guy up.  Any ideas on a price for the 
>kit?
>
>Meanwhile, can anyone tell me what I would need to strengthen if I was 
>
>to supercharge a 30 year old engine/vehicle?

Every thing from the head studs/nuts to the sump bolts and from the
flywheel to the harmonic damper.
 Look at it this way. You are going to increase the output of the engine
by 10-20%. If you were to get this increase in any other way (ie radical
cams, head, pistons etc,etc) you would make every part as strong as
possible. Same thing here.
 The lower end of the engine needs to be as bullet proof as you can make
it. This will mean spending some $$$$. ARP rod bolts and  main cap bolts;
have the rods magnafluxed, straightened and shot peened. Crankshaft
should be shotpeened also.  as well as measured and re-ground as needed
(no out of round journals,etc). ALL journal shoulders should be radiused.
ANY part that is questionable should be replaced with new, preferebly
with aftermarket competition equipment.
 On the top end, have the block "decked", with the minimum cut neccessary
to level. Likewise the head. Remove no more metal than needed to true it
up. ARP head studs and hardened, ground washers. Undercut the stud holes
in the block before installin the new studsInstall new hardened exhaust
seats; have a good 3 angle valve job done. Phospher bronze guides,
correctly sized and fitted.

This should get you started.

Remember, "Speed cost money.  How fast do you want to go?"


Rick Morrison
72 MGBGT
74 Midget


>My recent dashing around the countryside has left the little yellow
>beast sounding a bit ragged around the edges as I think I pushed her a
>bit hard - so would the supercharger just give me the ability to 
>really
>tear her apart at the seams?
>
>BTW I am hoping the noise is purely exhaust (I haven't had time to 
>even
>look properly yet) as I had already half crushed one of the pipes on 
>an
>errant rock or speed hump on the weekend so it may have given up the
>ghost on some of the even rougher roads at speed.  
>
>Or maybe it was that slow cat...?
>
>Eric
>'68 MGB MkII
>


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