ziggs

hey guys i've got a set of cc heads and my machinist told me i can fit 4v valves but no inserts, hence run on lrp or add valvesaver stuff, just wanted to know from 2v to 4v valves its a fair jump in size is there anything available inbetween with inserts so i can run just plain premium ron98??

brenx

There has to be. I had 2.100" inlets and seat to suit. Sounds like the machinist isn't looking in the right place. Stock 2V is 2.02 from memory. 4V starting @ 2.19".

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XB Fairmont (street car) 11.07@123.02mph.

LTD351V2

why can't you fit inserts???? I have 2V heads with 4V valves and just had inserts fitted in the exhaust seats, cost about 30$ per seat but can be had for 20$.

ziggs

ye i thought there had to something betta than standard i'll tell him to get off his arse and look into it.

xdclevo

Maybe better to find a shop thats willing to do it properly without extra prompting from you.

russxr67

I,d look for another shop to do the work.You can certainly fit inserts with a 4v size ex valve. Forget about fitting the 4v intakes on the 2v heads. Standard size inlets are 2.04 which is plenty big and Ferrea make a stainless unit at around this size. this size valve will still move plenty of air for most purposes short of full on engines. If you must go bigger than stock then purchase a set of 4v valves and have them turned down to 2.1 as brenx suggested. Anything larger than that size usually suffer . you simply can,t get the short side radius to work properly with a 4v valve in a 2v head.

crochunter

Just watch it sometimes when putting inserts in. Sometimes they can go through to the water jackets.

wizardry

only if the machinest is not carefull.