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crs240sx
12-10-2001, 01:19 PM
I have heard that Nissan lowered the compression ratio on 240's early in the first year of production.

Can anyone verify this?

My shop manual says 9:1, but a friend told me that they were produced with 10:1 pistons for the first few months.

handfulz28
12-10-2001, 09:28 PM
I think it was just 9.5:1, but yeah, early motors had the higher-compression pistons. That's why the ITCS show 9.5:1 for the SOHC/ITA.
Michael
ITA #09

Pete Smith
12-13-2001, 07:58 AM
The 9.5:1 pistons you're talking about are avaiable through Nissan Motorsports and are in the catalog, and come in std and .40 over.

crs240sx
12-13-2001, 09:03 AM
Thanks for the info.

Corey

crs240sx
02-04-2002, 11:45 AM
Can somebody verify whether the the 9.5:1 shown for the ITA 240 in the ITCS includes the allowed .5 over stock.

In other words, is the max compression allowed 9.5 or 10 to 1?