Big valves - was Fw: (no subject)

[JShadzi at aol.com]

In a message dated 2/20/2001 6:14:34 AM Pacific Standard Time, 
conner at cfm.ohio-state.edu writes:


> 
> I thought the big valve upgrade referred to swapping the head from the
> newer 2.3 liter NF engine (130 hp), which came on the 5K/100 starting in
> mid 1987.  I think one of the main reasons for it's higher HP is the larger
> exhaust valves, and it's supposed to be a simple swap/upgrade.  I'm not
> aware of any trade-off re: loss of low-end power, etc.
> Dave C

The exh. valves are the same size, the intake went to 40mm from 38mm, also 
cam specs were more aggressive, and the motor went to 2.3l and 10:1 
compression.  Any 40mm valve out of an NG/NF motor will work, a good upgrade 
IMO.
Javad
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