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gemicrusier tinkerer
Joined: 14 Feb 2003 Posts: 129
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Posted: Tue May 13, 2003 3:11 pm Post subject: supercharging N/A engine |
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thats what i want i have the n/a engine i think its got about 11:2 compressioon but i have also been told about 10:4 or something its got about 140hp rears. i wana super charge it can i drop the compresion enough and run like 5-8 psi or am i dreaming.
thanx |
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zzz petrol head
Joined: 16 Jan 2002 Posts: 1298
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Posted: Tue May 13, 2003 4:36 pm Post subject: Re: supercharging N/A engine |
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yes you can as above use a copper headgasket you may have to change the cam as well do a search this topic has been
discussed a few times
cheers zzz |
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gemicrusier tinkerer
Joined: 14 Feb 2003 Posts: 129
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Posted: Tue May 13, 2003 4:51 pm Post subject: Re: supercharging N/A engine |
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yea i know u can lower it a little with decompression palte copper head gasket and cam but i think theres a point of to much compression to lower. |
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zzz petrol head
Joined: 16 Jan 2002 Posts: 1298
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Posted: Tue May 13, 2003 4:54 pm Post subject: Re: supercharging N/A engine |
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drop in different pistons then or buy a head that hasn't been shaved heaps maybe |
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Gene FJ20DET hod rodder
Joined: 06 Oct 2001 Posts: 9163 Location: brisbane
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Posted: Tue May 13, 2003 5:03 pm Post subject: while on teh topic |
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i know 1mm decomp plates will drop compresion ALOT, but i was reading a ZOOM mad and they were doing a HOW TO, on building a monster HP sr20
they use a decomp plate 23mm thick????????????
WTF _________________
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MR_GEMI hod rodder
Joined: 05 Oct 2001 Posts: 7826 Location: Adelaide
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Posted: Tue May 13, 2003 5:09 pm Post subject: Re: while on teh topic |
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FFS thats insane!! _________________
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Ben Wight backyard mechanic
Joined: 04 Oct 2001 Posts: 946
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Posted: Tue May 13, 2003 5:40 pm Post subject: Re: while on teh topic |
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Sure it was a decomp plate and not simply a block extension to allow a longer stroke?
Ben |
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Gene FJ20DET hod rodder
Joined: 06 Oct 2001 Posts: 9163 Location: brisbane
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Posted: Tue May 13, 2003 5:51 pm Post subject: Re: while on teh topic |
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i was just thinking that after i posted it. i might dig it up and have a read of it again. but it does ring abell from something ive read _________________
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zzz petrol head
Joined: 16 Jan 2002 Posts: 1298
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Posted: Tue May 13, 2003 7:00 pm Post subject: Re: while on teh topic |
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noway <..>
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DrIFtA tinkerer
Joined: 13 Mar 2003 Posts: 246
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Posted: Tue May 13, 2003 10:42 pm Post subject: Re: while on the topic |
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Would have been the spacer plate as used in the JUN SR20DET stroker kit, it punches it out to near on 2.2L with longer rods and JUN pistons... |
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Loz backyard mechanic
Joined: 05 Oct 2001 Posts: 943
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Posted: Thu May 15, 2003 1:53 pm Post subject: Re: supercharging N/A engine |
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Isnt 11:2 compression about 5.5:1. Thats plenty low enough to run a supercharger. Dont know about making 140hp though. Maybe 10-25hp coz thats very low. |
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