John02SS

iTrader: (47)

Was bolting up the rockers on the F13 swap today and the couldn't get the preload right. I had to use the shims supplied with the Yella Terra rockers when I put the heads on with the TR224, but now I get 1 3/4 turns after 0 lash. I went and bought some washers just a hair thicker and get 1 1/2 turns. Is it safe to stack washers for shims? Would a 7.35 pushrod correct this and is this the proper way to do it? Jay was supposed to have set the heads up for a 7.4 pushrod and he verified this several times, but even with the TR224 (which mush have a smaller base circle than the F13) shims was needed to get it close. and with the "Superior" Customer service Absolute offers I'll never know what the hell he did! The circle on the 13 must be larger as the lifter preload went up almost a full turn over the 224 cam. Damn this is frustrating! Any help is greatly appreciated!

John

Kurtomac

iTrader: (5)

heres the easiest and best way to solve your problem....put the stock rockers on and torque to 22lbs

Time2Kill

iTrader: (49)

That still doesn't mean his preload will be right. If the base circle of the cam changes, then you must compensate by changing pushrod length or shimming the rockers.

Slowhawk

iTrader: (12)

I don't think Absolute can garrenty a pushrod.I'm figuring your heads are milled probly .030.That would require the 7.350 pushrod with your TR224 cam.

John02SS

iTrader: (47)

kurtomac,
That is incorrect info buddy. Thanks for the reply.

The heads are 5.3's that are milled .005 and are supposed to be 11 to 1 with they way he set them up. The valves will open before the 22 ftlbs is reached. I doubled the shims and only got 1/4 turn so I'm stuck. Will the 7.35 cure this or atleast get me close? Thanks.

Kurtomac

iTrader: (5)

i wouldnt thing with only being milled .005 that you'd need .050 shorter pushrod, i dont know what absolute speed does but my TEA 5.3s are milled .016 with my F13 and i used stock legth 7.4 Pushrod.....are you usings stock lifters or Comp R's

Damian

iTrader: (89)

I ran 7.4 pushrods with my Fm13 and TEA's miled .025 with no problems.

bigdsz

iTrader: (1)

I've got AS 5.3's supposedly with 11/1 CR. Jay set up my heads for a TR 224/224 cam and told me to run 7.350 PR's. I told him I already had 7.4's and he said some guys did make them work but he didn't reccommend it. I think the stems on his valves are slightly longer than stock thus the shorter push rod. You need to check the base circle on the TR vs Futral cams.

John02SS

iTrader: (47)

Kutomac,
I don't know man! lol I would think it would work, but I guess it is how Jay setup the heads.

Damian,
I don't know. The AS mystery! lol

Bigdsz,
Is your heads pretty new. Mine are identical to yours. What kinda preload did you have with your 7.35's?

pdd

iTrader: (3)

i have my afr-tea heads milled .024 and i just measured the pushrod length yesterday. i tried .065 washers with the 7.4 rods and that worked out ok , but i have HS rockers. the result: the rockers hit the valve covers-hence i had to buy 7.350 rods

John02SS

iTrader: (47)

I got a 10% off from Thunder for christmas so I'll be buying some 7.35's monday morning! It just never ends.

ppd,
How many turns of preload did the 7.35 prs differ from the 40's. Thanks buddy.

bigdsz

iTrader: (1)

Hey John, I've had my AS heads for six or seven months, they were some of
the later batches that Jay had CNCed elesewhere and then he hand finished
them. He wanted to use 977 dualsprings but I went with the 978's less
pressure.Those valves are SBC valves and either the stems are longer or they
sit deeper in the seat. I'm running stock rockers so if I've got a valvestem
that sticks higher than an OEM stem then I gotta use a shorter push rod or
shim the rocker. You also need to check your valve geometry, i.e. where the
rocker arm tip is hitting the top of the valve stem. Put some majic marker
on the top of the stem and seeif it wears off in the middle of the stem, if
not change PR's or shims.

David

jrp

iTrader: (16)

whats the base circle of your cam?

bigdsz

iTrader: (1)

John,

I just noticed you're in Florida where abouts, I'm in central Florida and go to one of the best shops around, Norris Motorsports. Mike can answer any of these questions we're toying with. He's a sponsor on this forum.

David

Beast96Z

iTrader: (21)

I don't think you need pushrods. If your heads are only milled .005" and indeed you cam does have a smaller base circle, then you would want the 7.400 pushrods. Adding a .050" shim under the rocker should drop the pre-load considerablly. My heads are milled .024" like PDD's and had about 1 3/4 turn past zero to 22 ft lbs. I added a .090" shim and could not get to zero lash before reaching 22 ft lbs. I then went with a .075" shim which got me between 1/4 to 1/2 turns past zero to 22 ft lbs. After the lifters get pumped up, this should be plenty of pre-load. You can stack washers if you need to. I don't think that will hurt anything. Although I found such an assortment of diffrent thicknesses at Lowe's, that I didn't have to stack.

John02SS

iTrader: (47)

Thanks David! Got your email also. I'm pretty sure the pushrod will take care if it. I'm in the West end of the Panhandle. Right on the Alabama line. I wish there was someone up here closer to us for performance. Right now Thunder and Futral are you two shops, but both are Very Good! I've heard great things about Mike also.

John

pdd

iTrader: (3)

i dont know. im looking at the cam card but says nothing of basecircle size. it does say lobe size is 1.410 intake and 1.40 exhaust. i havnt installed the 7.350's yet as i just ordered them

John02SS

iTrader: (47)

Beast,
I agree with ya, in theory it should be fine. I added .04 shims and was right were you are with 1.75. Doubled them and got .25 turn. I'll look for a better assortment of washers and try that. I worried they will hit the valve covers like ppd's did as the yella terra's are very close anyway.