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40 thou off the head? 

 

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 Post subject: Re: 40 thou off the head?
Posted: Tue Jan 05, 2010 7:29 pm 
Tyre Shredder
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acl apparently still do them other wise precison but there 1000 a set :o

 

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 Post subject: Re: 40 thou off the head?
Posted: Tue Jan 05, 2010 10:54 pm 
Getting Side Ways
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Have u tried hypatec pistons???

 

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 Post subject: Re: 40 thou off the head?
Posted: Tue Jan 05, 2010 11:06 pm 
Tyre Shredder
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kelv_05ef_wagon wrote:
acl apparently still do them other wise precison but there 1000 a set :o


Precision are a higher quality than acl, its the acl pistons that arent real flash.
I got a price on a full precision rebuid kit for a 302 windsor and it was 750 retail price,call here in perth and get it sent to you, probably be cheaper.
Surely they have flat top pistons for a 4.0 in a kit for less than 1000.
I could have got an acl race kit almost free but my engine machinist told me not to bother and hold out for the precision kit.(just my engine builders opinion not mine)
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 Post subject: Re: 40 thou off the head?
Posted: Wed Jan 06, 2010 9:57 am 
Stock as a Rock
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I had a JMM kit and here is my dyno sheet.

If i can remember I was instructed to shave 30 thou but no more. Once tuned I could only ever use BP ultimate (s/e qld its the best fuel)

I had a 1/4 of 14.2 but had more in it, never took it back before I sold it but should of cracked into the 13 bracket.

Jmm dont cost that much considering the results, but there are good and bad stories that goes with everything.

Image

 

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 Post subject: Re: 40 thou off the head?
Posted: Wed Jan 06, 2010 10:10 am 
Getting Side Ways
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Nice figures vegabass. Which DEV kit were you running??

 

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 Post subject: Re: 40 thou off the head?
Posted: Wed Jan 06, 2010 10:36 am 
Getting Side Ways
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kelv_05ef_wagon wrote:
alright after a bit more dicussion today and considering you guys input ive decided on decking the block to 0 piston hieght au head gasket and 10 thou off the head

anyone elses advice still welcome



thats not a good idea in the slightest.

zero deck with an AU gasket will only give you 18-22thou piston to head clearnce. THAT IS NOT ENOUGH. you want at least 30thou, even that is a little close.

If you are using and AU gasket you'll want at least 10thou deck hight

 

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 Post subject: Re: 40 thou off the head?
Posted: Wed Jan 06, 2010 12:34 pm 
Tyre Shredder
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2 scenarios- pistons to valves
ping city
8-)
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 Post subject: Re: 40 thou off the head?
Posted: Wed Jan 06, 2010 3:28 pm 
Getting Side Ways
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Just get a good engine builder to do all the hard work for u and get it all machined up for u

 

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 Post subject: Re: 40 thou off the head?
Posted: Wed Jan 06, 2010 8:05 pm 
Tyre Shredder
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MICKYYYY wrote:
Have u tried hypatec pistons???

nah never heard of them?

 

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 Post subject: Re: 40 thou off the head?
Posted: Wed Jan 06, 2010 9:19 pm 
Stock as a Rock
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KWIKXR wrote:
Nice figures vegabass. Which DEV kit were you running??



I think it was a dev 3 or some sort? It was ages ago and now have different dev packages. And for the above proof I will buy from them again.

 

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