Does anybody have the flowbench numbers on the D-port head and the Twin plug head, as to which head flows better out of the box and modified (no aftermarket heads, ie esslinger).

 

D port is the best flowing stock head. Dont have th flow charts though. Just have to take my word

 

These might help a little:

http://forums.stangnet.com/showthrea...highlight=port
http://forums.stangnet.com/showthrea...highlight=port

 

the best flowing factory head was actually the turbo head, but theyre a good deal harder to find... either way none of the LIMA heads flow very well and can do with some good machine work.

 

Now how do you know if you have a "Lima" head?

i've got a 2000 2.5Litre engine...

 

In 2001 in the middle of the year the 2.5 duratec came out, so your engine should have the late 8 plug lima head, also the lima had one camshaft (sohc) in the head while the duratec has dual cams (dohc). The duratec has a aluminum block and head, while the lima is all cast iron.

 

wow! thanks for the info!

Ok, since we are on the topic of heads, is the flow rate on a twin-plug Lima head alright or is this a good item to get cleaned up?

Also, is that really expensive? I guess I should ask a machine shop that.

 

2.3 Duratech. I'm pretty sure the block only bores to 1.8, 2.0 and 2.3
2001 was the last year for the twin plug 2.5 and the beginning of the 2.3 dohc Duratec

 

i found this on rps
http://www.rangerpowersports.com/for...d.php?t=187805