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Need some advice on compression

  • Thread starter Thread starter image
  • Start date Start date Mar 1, 2006

image

New Member
Jun 10, 2005
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0
Mar 1, 2006
#1
  • Mar 1, 2006
  • #1
I have a buddy who wants to sell his 98 fully built mustang. It has all the boltons imagineable, it also has a built motor. In this built motor he has thrown a rod and it is currently in the shop getting repaired. Im guessing that will be all fixed. Anyway, he originally built the motor with the "NA" mindframe. I on the other hand wan to boost the hell out of it. I forgot what he told me his compresion was but it was way too high to add a blower to it. In saying that, is there something i could do to lower the compression?? He said replace the head gaskets, im not sure how much truth is into that.

Edit: Compression is 11.8:1

Thanks guys!
 

1LowGT

New Member
Sep 4, 2005
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st louis mo.
Mar 1, 2006
#2
  • Mar 1, 2006
  • #2
change the pistons would be the proper way imo
 

DropTopPony

Noob Slayer
Founding Member
Aug 13, 2002
2,570
3
48
south jersey
Mar 1, 2006
#3
  • Mar 1, 2006
  • #3
Even if you used Cometic head gaskets you would still be in the 11's compression wise. Unless your gonna run race fuel that won't work with a blower. It would however be great for Nitrous.
 
I

IH8RICE2

New Member
Aug 18, 2005
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0
Peachtree City
Mar 1, 2006
#4
  • Mar 1, 2006
  • #4
Yeah i wouldn't run a blower with 11:1 compression. Either change pistions (maybe heads?) or run n2o with the current setup. To run boost you need/want around 9:1 compression or less imo.
 

back_in_black

New Member
Apr 12, 2003
460
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frederick, MD
Mar 1, 2006
#5
  • Mar 1, 2006
  • #5
IMO if the "built engine" has thrown a rod I would not place much faith in it's construction. I would plan on having to rebuild it again if you purchase it.
 

jasonh_86

I
May 20, 2005
1,156
2
48
Arkansas
Mar 1, 2006
#6
  • Mar 1, 2006
  • #6
That is definately too high for a blower..

However, to lower the compression you could go with some dished pistons.. some 18cc dished pistons should take care of that compression problem .. That'd get you down into the 8.3-8.5:1 compression area.. If i'm not mistaken
 
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