Hi, the other post on springs got me thinking; i have the AFR 305CC BBC heads with an Ultradyne Solid flat tappet 288/296 cam, the springs that came with the heads are the same as the other post so i will just cut and paste his specs(same part number)
Part# 8016
Size: 1.550 OD
.750 ID
Pressure 140# @ 1.930
365# @ 1.380
Coil Bind: 1.140
Thanks for any help, i could get one of the springs tested if needed

Originally posted by cody:
Hi, the other post on springs got me thinking; i have the AFR 305CC BBC heads with an Ultradyne Solid flat tappet 288/296 cam, the springs that came with the heads are 1.550"OD dual valve srpings with dampner, 240ibs on seat.750"max lift. Will these work? with this cam? thanks! =
Cody,
Absolutely not :eek: Those are roller springs.

sorry wolfplace i went back and edited, those original were the wrong ones it is correct now!

Originally posted by cody:
sorry wolfplace i went back and edited, those original were the wrong ones it is correct now! =
That's better but is still more spring than I run on the street, that's about where i run my circle track stuff.
About 120-130 / 320-330 is plenty after break in.

=======edit===========
Actually the 140 seat pressure doesn't concern me it is the open pressure I would be concerned with.

so what do suggest i do?

Cody
We are in the same boat I see. I will wait and see just like you!!! :confused: If nothing concrete comes out of our thread I will look into getting Isky Springs from www.flatlander.com, (http://www.flatlander.com,) you might want to look into these as an option to the AFR Springs:
Part# 3105-D
Outer w/ Damper 1.490 OD 1.076 ID
130 Lbs.@1.700
320 Lbs.@1.200"
.500 Lift
Cost: $86

Originally posted by cody:
so what do suggest i do? =
Change the springs :D
=
I don't have a problem with 350 open after breakin. You are going to be about 380 with that cam.
This is too much spring for a street car.
I would like a spring that is about 120-130 @ 1.900 & 325-350 @ 1.300.

There are a lot of options on springs but an Isky 8005A would be a good spring if your installed height is 1.930
It will be 115 @ 1.925 & 355 @ 1.325. Again, you would run this after breakin.

Deeboo,
The 3105 spring will not work, your installed height is not 1.700 & it is only rated to .500 lift.
You need to measure it but I belive it closer to 1.85- 1.900, don't remember for sure.

Originally posted by Wolfplace:

Deeboo,
The 3105 spring will not work, your installed height is not 1.700 & it is only rated to .500 lift.
You need to measure it but I belive it closer to 1.85- 1.900, don't remember for sure. I guess I will piggy back Cody...
What would you suggest? Part# Please :confused:

PS: Cody hang in there we will eventually find the right springs.... :D

What is your installed height?? You should measure it before anyone can give you a part number. ;)
I am a dealer for AFR & I don't know all the installed heights. Even if I did I would still measure it just to be sure.

Cody, this is for you too, measure your installed height on your heads


======edit==========
Also, while you have the retainer off measure the steps or measure the id of the inner & outer spring so you can find a spring that will fit the retainer you have

These are the springs I used crane#99893 1.460 outer,inner dementions.803 120#@1.875 394#@1.175,coil bind 1.080

Originally posted by JRS70LS5:
These are the springs I used crane#99893 1.460 outer,inner dementions.803 120#@1.875 394#@1.175,coil bind 1.080 =
This is exactly why I said to measure your installed height on your head & then measure the retainer steps.
A 1.460 spring is not going to fit a 1.550 retainer. ;)
You need to know the actual installed height of your heads not a generic number. This is where people get into trouble, by relying on published data without checking their specific application
But,, those would be an excellent spring if you get the retainers with them & shim to the 1.875 called for. They wil be about 350 lbs open with .600 lift ;)

Wolfplace
Here is my spec on the spring that AFR installed for me. I ordered the AFR 195 #1036 Heads with the upgrade 8033, which consist of part# 8016 and .100 valves,the specs. are the same as Cody:
Part# 8016
Size: 1.550 OD
.750 ID
Pressure 140# @ 1.930
365# @ 1.380
Coil Bind: 1.140
Rate: 410
Lift: 600

DEEBOO,

If you have the promised 1.930" installed height, the MAXIMUM open pressure will be about 345 lbs. This is OK if you break the cam in WITHOUT the inner springs and dampener.
I would give the cam a good solid 30 minutes minimum break-in, at least 15 minutes at a time, 2500 to 3000 RPM. If you want 3 15-minute segments, that's OK.
After break-in, you can replace the inners, etc, when changing the oil and filter.....
The 280/284F is a reasonably reliable cam, I might lose 1% during break-in.

UDHarold

Thanks Harold, graemlins/thumbsup.gif

Deeboo again, you need to check the installed height on your heads to be sure it is in fact 1.930. Do not take the published spring spec as meaning that this is where they are.

Cody,
The reason it will work for Deeboo & not you is you have another .100 lift which will put you at aboout 380 ;)

Okay i appreciate the info, I am going to talk to tony. I told him what cam i had and the specs and he sent me these springs. also i was doing a search and others were talking about AFR's springs being to stiff and to generic(as in Solid flat tappet spring, roller spring etc.) for use on the street. Can you tell me how i go about measuring the installed heights and everything else that goes along with it? thanks!!! Hey Harold can you please comment on my setup since this post was about mine and i am running your cam redface.gif (no offense Deeboo i hope you get just as much info as i do! graemlins/beers.gif

Best way to measure is to take a spring off, put the retainer & locks back on & measure the distance from the cup to the underside of the retainer on the outside step with a snap guage if you don't have a height mike made for this purpose.

I'm going to run ISKY 8305 springs for that cam on my BBC. If I go with a roller later, it will basically be a straight spring/Ret. swap except for a shim or two. UDH told me 140/340 for the 288/296. But said he's seen 125/325 work. Note, this is over the nose, not what the spring is rated at in the book. The listed Lunati spring is 140/400 for 377lbs/in IIRC.
The 8305 is 370 lbs/in. and will fit the .300 thick exh rotator spacer for stock heads. Not that you have those things, but I do.
Isky (http://www.iskycams.com/pdfcatalog_index.html)
Click springs and Pg41 for specs.
For the 8005 or the 8305, it depends on your installed height and future plans.

I was told that with the 99893 springs and .600 lift, that the springs will wear out sooner. By someone whose seen it. Yeah I know people are using the 99893's. I just chose not too even though I already have a set.