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Discussion Starter #1
i was wonder if anyone knows what the cam lift limit is on a d16y7 head without modifying the cam valley walls?

is it the same as a z6 or y8 head?
 

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Discussion Starter #2
just wanted to add.

i have a friend who had a d16z6 with a skunk2 cam, he told me that he had to file the inner walls down or it would hit near where the spark plug tubes go.

this is the reason i am asking, also if the 59300 zex cam requires this on the z6/y8 vtec heads?....
 

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90 CRX Si
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I don't know about a Y7 head, but on a Z6 head which is very similar in design, my Crower stg 2 at 432/436 almost doesn't clear. The stage 3 at 442/468 requires modifications. Now these are billet cams, so theoretically you should be able to get more lift from a regrind without interference.
 

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just ask your manufacturer what they recommend.
 

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()*#$(*$
93 Legend L Coupe.
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Another advantage of Non-VTEC heads is that they can run much larger cams without getting involved with smacking things. =) I don't know the exact limits, but I don't think that even with a hard-welded cam you are going to run into interference issues.
 

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Well?
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i THINK tuna had to clearance his with his bisi level3 but dont quote me on that
 

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Brokedick Millionaire
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i was wonder if anyone knows what the cam lift limit is on a d16y7 head without modifying the cam valley walls?

is it the same as a z6 or y8 head?
Depends on the spring bind height :)
 

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90 CRX Si
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umm, no. the cc, yes. the rocker assembly and valve train galley, no. the y7 and the y8 are the ones that share that area, along with ports.
Eh was a good guess, lol. I knew the cc's were so i figured they were, never messed with a y7 head.
 
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