Out of the box heads?
10-14-2015, 02:17 PM
#53
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I set them upbthebwaybeverynotjer marine engine I ever had has been set up, I run my boat in cold water as early as April 40 degree water and want to make sure I have no issues. Last 2 sets of engines been the same over 10 years no issues. Now tight I have had issues...I did what I know works
10-14-2015, 04:48 PM
#54
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I set them upbthebwaybeverynotjer marine engine I ever had has been set up, I run my boat in cold water as early as April 40 degree water and want to make sure I have no issues. Last 2 sets of engines been the same over 10 years no issues. Now tight I have had issues...I did what I know works
10-14-2015, 05:09 PM
#55
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My AFR 385 V2's were .0018 across the board on all 16. Had 4 checked in one shop and the rest in another everything was dead nuts the same. Both shops said the same thing. They had never seen a set of heads with everything so even across the board. I will get the Valve job checked on a Serdi in the next week or so to see what we have... Really for the money I paid for the complete heads I don't think I could have bought them bare then purchased the rest of the parts for that kind of money. If they need some extra work... Whatever. I'm happy with so far. T&D Steel shafts with .802 lift on the intake ended up with a great pattern on the valve. I'll let you guys in on the results of the valve job good or bad.
10-14-2015, 05:14 PM
#56
Banned
My AFR 385 V2's were .0018 across the board on all 16. Had 4 checked in one shop and the rest in another everything was dead nuts the same. Both shops said the same thing. They had never seen a set of heads with everything so even across the board. I will get the Valve job checked on a Serdi in the next week or so to see what we have... Really for the money I paid for the complete heads I don't think I could have bought them bare then purchased the rest of the parts for that kind of money. If they need some extra work... Whatever. I'm happy with so far. T&D Steel shafts with .802 lift on the intake ended up with a great pattern on the valve. I'll let you guys in on the results of the valve job good or bad.
10-14-2015, 05:37 PM
#57
My AFR 385 V2's were .0018 across the board on all 16. Had 4 checked in one shop and the rest in another everything was dead nuts the same. Both shops said the same thing. They had never seen a set of heads with everything so even across the board. I will get the Valve job checked on a Serdi in the next week or so to see what we have... Really for the money I paid for the complete heads I don't think I could have bought them bare then purchased the rest of the parts for that kind of money. If they need some extra work... Whatever. I'm happy with so far. T&D Steel shafts with .802 lift on the intake ended up with a great pattern on the valve. I'll let you guys in on the results of the valve job good or bad.
Valve Guide Clearance:
Our typical valve guide clearances are .0013”-.0016”. In some severe applications (nitrous, marine endurance racing, or blower usage) looser guides might be required. Check with your engine builder.
http://www.airflowresearch.com/installation.php
10-14-2015, 06:27 PM
#58
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Interesting. The few friends I have that bought new AFR bbc heads, did not see .0018 guide clearance. Not surprising to me, as AFR themselves say they come tighter than that, in their own literature....and the ones that were checked, were in fact, tighter than that. The disclaimer from their afr "dealer" was , "Afr used smaller stem sizes, so that measurement was innaccurate, and the guide clearance needs to be checked with AFR's supplied valve". Ummmm, if you bought complete heads, wouldn't standard procedure be, to measure the stem of the valve the heads came with!?? What valve did this dealer think they were measureing? A valve out of a 1985 buick that was on the shelf?
Valve Guide Clearance:
Our typical valve guide clearances are .0013”-.0016”. In some severe applications (nitrous, marine endurance racing, or blower usage) looser guides might be required. Check with your engine builder.
http://www.airflowresearch.com/installation.php
Valve Guide Clearance:
Our typical valve guide clearances are .0013”-.0016”. In some severe applications (nitrous, marine endurance racing, or blower usage) looser guides might be required. Check with your engine builder.
http://www.airflowresearch.com/installation.php
