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Re: [Fot] 89 mm liners in a street TR4

To: billb@bnj.com, timmurph@fastbytes.com
Subject: Re: [Fot] 89 mm liners in a street TR4
From: GSFuqua1@aol.com
Date: Fri, 12 Feb 2010 02:31:56 EST
Tim, I have actually seen TR 3 & 4 engines go as high as 92 mm jugs  & 
pistons.  Just make sure you don't deck the block too much.   Same goes for 
milling the head.  If you want some professional help Daryl  Uprichard of 
Racetorations has done this quite often.  Ken Gilanders  probably has too so it 
might help to visit with them on what size fits what you  are going to use the 
car for.  I have one of Daryl's engines waiting on me  to finish the body 
work.  I elected to use the 89 mm because the 92 mm  makes for some pretty 
narrow spaces between the jugs.  Daryl ran the 92's  in his race cars.  As you 
can imagine they will significantly increase the  kick in the pants when 
you hit the gas pedal.  Especially with one of  Larry's cams.  Just make sure 
you have the right fuel pump to keep up with  the demand.  Of course all the 
other things need to be balanced as  well.  Needles in the carbs, intake 
and exhaust valve size and some decent  porting and polishing on both sides 
make a difference.  My recommendation  is to gather as much info going in and 
then have the engine dyno tuned.   You will be much more pleased that just 
what us mere mortals can do in the  shop.
 
Cheers, Gary
 
 
In a message dated 2/11/2010 11:56:05 P.M. Central Standard Time,  
billb@bnj.com writes:

I don't  think so. I've only used them in racing applications though. I'd
probably  leave the compression ratio at 9.5 so you can get by with pump 
gas.

On  Feb 11, 2010, at 5:23 PM, Tim Murphy wrote:

> I'm planning on  rebuilding the engine in Ryan's street 1964 TR4.  We're
> thinking  of putting a set of Ken Gilanders liners and forged pistons in.
Is
>  there any downside to using the 89 mm liners versus the 86 or 87 mm  
liners?
> If the 89 mm liners are used is there anything else that would  have to be
> changed?  The car has the Stromberg carbs and he has  already put a 4 
into 1
> header on it some time ago.  Had to, the  cast iron exhaust manifold 
cracked
> in half.  We've already gotten  one of Larry Young's 270 cams for it and
plan
> to mill the head  slightly.  The 89 mm liners would bump the CR up to 9.5
> with the  stock head and I was thinking of milling it to go to 10 to 1.   
I'd
> appreciate any thoughts/advice from the group on  this.
>
>
>
> Thanks,
>
> Tim
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