Afr 8017 springs and xfi cams?
09-23-2014 | 05:17 PM
#1
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From: vicksburg,mississippi
Car: 1986 z28
Engine: 350 hsr
Transmission: probuilt 700r4/edge 2800
Axle/Gears: stock 4th gen 3.23
Afr 8017 springs and xfi cams?
I have a set of afr heads with the standard 8017 springs. My question is will these be able to control the lobes on the xfi cams? Most people suggest upgrading to the 8019 springs. I'm looking at the xfi 268 in particular.
09-23-2014 | 08:26 PM
#2
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From: Davison, MI
Car: 89 Camaro
Engine: 383-Holley Terminator EFI
Transmission: 700R4 Pro-Built Street/Strip kit
Axle/Gears: Strange S60 3.55:1
Re: Afr 8017 springs and xfi cams?
I have yet to run it, but I have a XFI280 and when I spoke to AFR they made no suggestion about upgrading valve springs. I think the upgraded springs are more relative to how high you're going to spin your motor, I won't be going over 6k.
09-23-2014 | 08:32 PM
#3
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From: Philly, PA
Re: Afr 8017 springs and xfi cams?
My experience with AFR springs is that you should test them in a spring tester to confirm they are what the specs say they are. AFR turns out some quality cylinder heads, but their spring specs are often way out to lunch. Every set I've tested has had MORE pressure than spec, and not just by a little bit. More than I could ever explain by simple "production line variation".
09-23-2014 | 08:58 PM
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: Strange 12 bolt 3.42
Re: Afr 8017 springs and xfi cams?
Thats interesting on the spring specs being out of wack
But the 268 under 6200 rpm should be ok with the 8017's
But the 268 under 6200 rpm should be ok with the 8017's
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