boyd95SS

iTrader: (1)

i recently got a 5.3L motor and was looking at putting a set of AFR 205 heads with a 228/228 cam, however i was told i should go a little bigger because i want more lope like a 232/236.
is that too big a cam for a heads/cam/longtube 5.3 motor?
some people say the 228 is a big cam for 5.3 and some told me the larger was ok
help
thanks

LTX355

iTrader: (15)

a 224 cam is a nice size for the 5.3 i wouldnt go over 228 unless u plan on increasing compression above 10.1... big cams kill dcr and that is gonna take all your low end.

garygnu

it depends on your combo and what your doing with it.is it a street car or a all out race car?

boyd95SS

iTrader: (1)

as far as compression i am just going to get the thinnest head gaskets i can.
and it is just going to be a street truck hehehe, i am removing the piece of crap lt1 and putting in the 5.3 in a `95 s10
thanks

garygnu

talk to Patrick-G you would benefit from a custom cam with those heads.what gears and and trans?you will need lots of toque to move a heavy truck.too much lope- over lap will make it slow out of the hole.

boyd95SS

iTrader: (1)

it has a ford 9in with 3.70 gears and a 4l60e

garygnu

how big a stall converter will you go with.the the higher the stall the bigger the cam you can work with.how much dose a s10 weigh?how tall of tire?I was thinking of a c1500 weight earlier,sorry.the s10 is a good platform for a hot rod.

boyd95SS

iTrader: (1)

it weighs about 3800pds, ill probly go with a 3200 stall or so on a 275 tire

NemeSS

iTrader: (127)

No need for afr heads on a 5.3. A stock milled set of 243/799 will get the job done with l33 5.3HO/5.7 head gaskets and a patg spec cam

boyd95SS

iTrader: (1)

the only reason would like to get the afr heads and cam is because i can get the combo at half price with 5k miles on them from a known source, also have heard lots of good out of the 205's

NemeSS

iTrader: (127)

If that's the case get the afrs.ditch the 5.3 and slap dem bitches on a lq4 or lq9 with the cam

sman

iTrader: (4)

Check my sig for numbers and parts.

Cam is right on the limits for the motor, low end is pretty much gone, but shes a screamer up top. Kinda hard to tune, plan on bumping your idle a good 150-200 rpms to keep it running. I dd the car in the summer and sometimes its just to much. Bumping the CR should help a ton.

5.3LJimmy

iTrader: (10)

For a 3800 pound truck you really should stay at or below 224 degrees on the intake side. The Comp 224/228 on a 112 LSA does good in the 5.3 and would work well with the AFR heads. This cam will lope plenty in the 5.3 and is the max I would recommend.

boyd95SS

iTrader: (1)

thanks for the replys guys,
i thought the 5.3 was designated lq4, what is it called then?
my lt1 made 320/295 at the wheels and it had a nasty first and second then fell off in third gear, what kind of power and times am i looking at with the new motor heads/cam/headers?
and the heads/cam come with the right length pushrods, if i want to say shave the heads and put thin gaskets, what will that do to the pushrods

NemeSS

iTrader: (127)

Lq4 is the 6.0 engine not the 5.3

91_rs-teal

iTrader: (13)

all the GM Vortec Engine codes


http://en.wikipedia.org/wiki/GM_Vortec_engine

boyd95SS

iTrader: (1)

ok well that afr deal fell through so i went ahead and bought a 226/229 58x lift and 112lsa and some ls2 heads. however, i am now going to bore it to an ls1 bore and go with forged internals and spray, so is that cam going to be big enough in an ls1

remauto1187

iTrader: (1)

There are quite a few RPO codes for the 5.3L. Different variations.
You might be thinking of the LM4 which is a 5.3L Alum heads and block.

boyd95SS

iTrader: (1)

anyone?

zacht

iTrader: (18)

plenty of people run 224's and 228's and make great power in a 5.7. you'll be fine. the wilder side of the 5.7's gets up into the 240's and .6-.65 lift....