afr 165 competition differences?

[igotyofire]

the only differences i see is upgraded valve springs.....i belive it says it uses different valve sizes but all the ones i see is 1.90/1.60 which i belive is standered, does anyone know the true differences in this head from the other. Most people here dont use the competition heads do they?

 

[Joes95GT]

There is no "option" to upgrade the valve sizes in the 165 heads. If you want a bigger valve, you're going to have to cut the seats or move up to a bigger head.

The 1.90/1.60 combination is more than enough in size.

Joe

 

[igotyofire]

There is no "option" to upgrade the valve sizes in the 165 heads. If you want a bigger valve, you're going to have to cut the seats or move up to a bigger head.

The 1.90/1.60 combination is more than enough in size.

Joe

maybe u misunderstood me, the reason i mentioned the valve was because

http://www.airflowresearch.com/pages/165sbf_sh.htm
if u scroll down to "Basic Package Components" it states "Intake Valve, 1.900” stud mount, AFR #7200 Comp PKG #7203" the 2 part #'s led me to belive they were possibly different sizes althought it doesn't look like it, i was just asking whats so different about those heads

Also on Adperformance.com http://www.adperformance.com/index.php?main_page=product_info&cPath=68_100_114&products_id=430
under spring options it says "upgraded valves"

think i got a bit mixed up , but i think i understand, just still dont understand whats the difference in the valves

 

[SeventyMach1]

And I don't think they're "street legal".

 

[DJHA90]

More advanced porting....

 

[Rootus]

maybe u misunderstood me, the reason i mentioned the valve was because

http://www.airflowresearch.com/pages/165sbf_sh.htm
if u scroll down to "Basic Package Components" it states "Intake Valve, 1.900” stud mount, AFR #7200 Comp PKG #7203" the 2 part #'s led me to belive they were possibly different sizes althought it doesn't look like it, i was just asking whats so different about those heads

Also on Adperformance.com http://www.adperformance.com/index.php?main_page=product_info&cPath=68_100_114&products_id=430
under spring options it says "upgraded valves"

think i got a bit mixed up , but i think i understand, just still dont understand whats the difference in the valves

When you get the spring upgrade on the AFR165's, you also get a valve change, but not bigger in diameter, it is longer or shorter (can't remember which) because the installed spring height changes.

Dave