thank you AFR for great quality :) and now a question
#1
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thank you AFR for great quality :) and now a question
first all let me thank AFR for making a great quality head. i just set the wipe pattern on my yella-terra ultra lites and they were dead on center with only the single shim that was provided i hear so many others have to buy additional shims or get custom thicknesses and i was able to avoid that PITA...
second is a question for the math majors
my afr's were milled from 66cc's to 60cc's ( .006-.007 x 6cc ) = .036-.043 inches.
my yella terra's only required a single shim .048 shim
my 228r cam is supposed to have the same base circle as stock it will arrive in a day or 2 so i can measure to be sure known ls6 base circle base circle diameter is 1.497 inch
ls7 lifters which require only 50 thou pre-load
any guesses at my pushrod length???
second is a question for the math majors
my afr's were milled from 66cc's to 60cc's ( .006-.007 x 6cc ) = .036-.043 inches.
my yella terra's only required a single shim .048 shim
my 228r cam is supposed to have the same base circle as stock it will arrive in a day or 2 so i can measure to be sure known ls6 base circle base circle diameter is 1.497 inch
ls7 lifters which require only 50 thou pre-load
any guesses at my pushrod length???
#5
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Haven't chosen injectors yet, but probably going to use a set of red top 42# I have already. Shooting for around 10.8:1 but I think it will be a little higher. I only have california 91 octane watered down gas to work with. Still using my BBK intake, and ported stock TB for the moment, but I'll be looking for at least a 92/92 setup in the near future once I get the car running.
I'll be getting a set of 1 3/4 kooks stepped to 1 7/8, and a custom Y to 4 inch catback. Not really sure on the power output, I'm hoping for more than my last build, which was 224r with stock 243's, it made 425rwhp. What kind of numbers are you shooting for?
I'll be getting a set of 1 3/4 kooks stepped to 1 7/8, and a custom Y to 4 inch catback. Not really sure on the power output, I'm hoping for more than my last build, which was 224r with stock 243's, it made 425rwhp. What kind of numbers are you shooting for?
#6
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second is a question for the math majors
my afr's were milled from 66cc's to 60cc's ( .006-.007 x 6cc ) = .036-.043 inches.
my yella terra's only required a single shim .048 shim
my 228r cam is supposed to have the same base circle as stock it will arrive in a day or 2 so i can measure to be sure known ls6 base circle base circle diameter is 1.497 inch
ls7 lifters which require only 50 thou pre-load
any guesses at my pushrod length???
my afr's were milled from 66cc's to 60cc's ( .006-.007 x 6cc ) = .036-.043 inches.
my yella terra's only required a single shim .048 shim
my 228r cam is supposed to have the same base circle as stock it will arrive in a day or 2 so i can measure to be sure known ls6 base circle base circle diameter is 1.497 inch
ls7 lifters which require only 50 thou pre-load
any guesses at my pushrod length???
Stock length = 7.385"
Milling: 7.385 -.036 = 7.349
Shimming: 7.349 + (0.048 * 1.59) = 7.425"
Stock preload I have measured is nominally 0.100" so a reduction to 0.050" would reduce length by 0.050" so final guess would be 7.375" gauge length pushrod.
Make sure you measure PTV, my setup was under minimum on the intake side with 224 intake duration and Cometic 0.040". You may be OK from the thicker gasket but you should verify.
#7
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texas speed recommended the 50 thou of preload on the ls7 lifters
im optimistic shooting for a 460ish rwhp with out spray we have 93 here with 10%ethonol
wow you were still outside the safety net with the 224 cam? glad i didnt go with the tsp 233/239 cam that i really wanted.
what cc were your heads?
new mods to go with H&c swap
25% underdrive pulley
head studs
comp hi tech push rod of undetermind length
rollmaster double chain
rpm stg 5 transmission
comp 926 springs with ti retainers on the afr heads
100hp shot nano kit
as for current mods made 373 rwhp on a stingy dyno
tpis 1 3/4 longtubes no cats random tech xpipe and borla stinger straight pipes,
haltech venom intake
spec aluminm flywheel and spec 3+ disk and hd pressure plate
next round of mods
dewitts raditor with oil cooler
electric water pump
fast 90 or 92 with tb
upgraded rear end
im optimistic shooting for a 460ish rwhp with out spray we have 93 here with 10%ethonol
wow you were still outside the safety net with the 224 cam? glad i didnt go with the tsp 233/239 cam that i really wanted.
what cc were your heads?
new mods to go with H&c swap
25% underdrive pulley
head studs
comp hi tech push rod of undetermind length
rollmaster double chain
rpm stg 5 transmission
comp 926 springs with ti retainers on the afr heads
100hp shot nano kit
as for current mods made 373 rwhp on a stingy dyno
tpis 1 3/4 longtubes no cats random tech xpipe and borla stinger straight pipes,
haltech venom intake
spec aluminm flywheel and spec 3+ disk and hd pressure plate
next round of mods
dewitts raditor with oil cooler
electric water pump
fast 90 or 92 with tb
upgraded rear end
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#10
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check it with no gasket hand tightened with the bolts then add your compressed gasket thickness to your final number so if you had .o53 ptv clearance with no gaskets the add your .041 compressed gasket thickness and you have .094 ptv clearance
#14
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Here's what I did. My prior gasket was a GM MLS. I drilled out the rivets and removed one thin layer of the old gasket. The remaining two layers will come out right at 0.040" plus or minus a few thou. Don't measure without a gasket, the piston comes out of the hole and will hit the head so you won't be able to turn the motor over.