Which Beehive Springs for AFR 195cc LT4's?
#1
Which Beehive Springs for AFR 195cc LT4's?
Getting ready to have the heads ported and assembled, and figured I would upgrade now for when I'm taking it to 7000RPM.
What Comp beehive spring part # do I use for these heads?
What Comp beehive spring part # do I use for these heads?
#3
Re: Which Beehive Springs for AFR 195cc LT4's?
Why the LS1 locator and why not the Comp 4705-16? This is my standard
cut and paste on the beehives in LT1 heads:
7 degree hardware with 4705-16 spring seats (1.73" installed
height):
787-16 retainers
648-16 locks
10 degree hardware with 4705-16 spring seats:
795-16 steel retainers, or
794-16 titanium retainers
611-16 locks (standard), 1.70" installed height, or
614-16 locks (+.050), 1.75" installed height
For either installation you will need spring seats:
4705-16 spring seats, .062" thick
Are LT4 heads different in this regard?
cut and paste on the beehives in LT1 heads:
7 degree hardware with 4705-16 spring seats (1.73" installed
height):
787-16 retainers
648-16 locks
10 degree hardware with 4705-16 spring seats:
795-16 steel retainers, or
794-16 titanium retainers
611-16 locks (standard), 1.70" installed height, or
614-16 locks (+.050), 1.75" installed height
For either installation you will need spring seats:
4705-16 spring seats, .062" thick
Are LT4 heads different in this regard?
#4
Re: Which Beehive Springs for AFR 195cc LT4's?
If that part number works with LTx heads then great... I was doing these before comp had those availible and was told to go to GM for stock LS1 locators, so that is what I have been doing since then, I get better prices on GM parts than most due to our R&D projects with Flowmaster and GMPP.
#7
Re: Which Beehive Springs for AFR 195cc LT4's?
I was talking about the 1.730" number listed.
I don't have valve float issues at the pressures I run so I don't run them tighter. Sometimes 140# + on the seat will cause lifters to bleed down and customers hate that. There is not much pressure change in .020" so it's no big deal.
I don't have valve float issues at the pressures I run so I don't run them tighter. Sometimes 140# + on the seat will cause lifters to bleed down and customers hate that. There is not much pressure change in .020" so it's no big deal.
#9
Re: Which Beehive Springs for AFR 195cc LT4's?
Why don't you get AFR 8015 springs (upgraded for high reving hydrolic cams) just exchange the springs.. AFR suggest that ..
145lbs close seat and there is no need to change your retainers,locks...
145lbs close seat and there is no need to change your retainers,locks...
#10
Re: Which Beehive Springs for AFR 195cc LT4's?
Originally Posted by MachinistOne
Your installed heights are too tight though...
125-135# on the seat is all you need.
125-135# on the seat is all you need.
I ended up with on a stock LT1 head. The way to go is with the +.050"
superlocks and the 1.75" height.
#12
Re: Which Beehive Springs for AFR 195cc LT4's?
Originally Posted by JustNO
My valves are .050 longer than stock, so what locks should I use? 611 or 614?
gives you the seat pressure you desire. The beehives are designed to be
installed at 1.80". I went with 1.75" because that's the most I could get
with the available parts.
If you go with the least expensive hardware, the 787-16 retainers and
648-16 locks, with your valves that's 1.78" installed height, assuming
you use .062" spring locators.
#13
Re: Which Beehive Springs for AFR 195cc LT4's?
I will go with 10degree hardware.. 794-16 tit. ret. Here we can see what close pressure at what height. For ex: Your beehives have 146lbs close pressure at 1.750" height (2. page)
http://www.compcams.com/Technical/Cu...ML/340-349.asp
http://www.compcams.com/Technical/Cu...ML/340-349.asp
#14
Re: Which Beehive Springs for AFR 195cc LT4's?
Originally Posted by JustNO
Why don't you get AFR 8015 springs (upgraded for high reving hydrolic cams) just exchange the springs.. AFR suggest that ..
145lbs close seat and there is no need to change your retainers,locks...
145lbs close seat and there is no need to change your retainers,locks...
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