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It sounds like you are more worried about looking stock than wanting more power. If this is the case find the cheapest cast iron, if you want more performance there are alot of good recommendations listed above.
i want both, within reason
if i'm going thru all this again, i'm going to stay away from cast iron, new or old...
rules are strict over in my state, LHD must be stock.
yes the rules are a bit relaxed now, but i like the old school look, hence the cast exhaust manifolds.
have looked for the "Kiwi ProTopline" heads, no luck anywhere, even looked NZ sales sites...
jim2527, "Knight engines" doesn't have a web site, and i'm not on facebook
Being in OZ, you should be able to pick up a set of the Kiwi ProTopline heads for a fair price. They flow really well, look stock, and the cast iron versions are bullet-proof while making great power. They have all accessory holes. ProTopline has since sold out to CompCams, but there have to be a bunch of those down there on the used parts market.
went with a set of Edelbrock Performer RPM heads, 60889 bare, sourced local.
i was after the old school look still, so i machined the ends of the alli at work to match the old "186 double humps"
alli on left, iron on right
3 angle valve job, mild clean up of short turns, and a general de-dag of casting edges and rough spots.
installed new valves and used my springs, guide plates, studs, arms etc.
block was decked to 0.010" and with 0.020" 4v flattops gave me 10:1 comp.
edelbrock performer 2101 manifold and a Lars tuned Qjet and points dissy.
howards retro hyd roller, 111145-12.
builder likes to run on dyno to bed in rings and check for leaks before installing it.
it made 410hp @ 5900rpm and 405ft/lbs @ 4700rpm at 32* timing, not really leaning on it.
found fuel pump was low on pressure at moderate/mid rpm's, so new one is on order.
Last edited by riverracer au; 10-24-2017 at 02:46 AM.
Reason: photos, extra info
original 1972 2 bolt block, bored +.020", decked to .010", with 4 valve relief flat tops.
howards retro roller cam 111145-12, 219 int./225 exh @ 50, giving 0.510 int./0.525 exh.
edelbrock performer rpm 64cc heads, with 3 angle valve job, ferrea valves, howards roller springs, comp cams roller tip rockers and studs.
slight clean up after seat cutting and removed rough casting surfaces, not polished, smoothed slightly.
carb and dissy were sent to Lars for a rebuild, and run as he returned to me setup.
premium fuel, 98ron, here downunder.
as stated before, nothing flash, just good match of parts.
Last edited by riverracer au; 10-25-2017 at 09:55 PM.
Reason: missed a "1" in cam number
I asked because I'm thinking on rebuilding my 71sb L48.
Keeping it stock at the bottom but changing heads and camshaft.
You gave me quite a nice blueprint to follow.
And not too expensive as I just looked at the prices of camshaft kit and heads.
original 1972 2 bolt block, bored +.020", decked to .010", with 4 valve relief flat tops.
howards retro roller cam 11145-12, 219 int./225 exh @ 50, giving 0.510 int./0.525 exh.
edelbrock performer rpm 64cc heads, with 3 angle valve job, ferrea valves, howards roller springs, comp cams roller tip rockers and studs.
slight clean up after seat cutting and removed rough casting surfaces, not polished, smoothed slightly.
carb and dissy were sent to Lars for a rebuild, and run as he returned to me setup.
premium fuel, 98ron, here downunder.
as stated before, nothing flash, just good match of parts.
I have the same but 110 LSA...summit and others mistakenly list the lift as you stated but it is actually .525/.525 lift, not .510/.525.
I have this cam with CNC AFR 180 64 CC with a 10.2:1 compression and the builder estimated my GROSS HP with the L-82 355 L-82 at 450 Gross HP based on his extensive dyno exp with my combo, mostly due to the AFR's which have fantastic flow at peak lift but even more importantly at the lower lifts....
I have the same but 110 LSA...summit and others mistakenly list the lift as you stated but it is actually .525/.525 lift, not .510/.525.
I have this cam with CNC AFR 180 64 CC with a 10.2:1 compression and the builder estimated my GROSS HP with the L-82 355 L-82 at 450 Gross HP based on his extensive dyno exp with my combo, mostly due to the AFR's which have fantastic flow at peak lift but even more importantly at the lower lifts....
yes, that's the cam i used,
i asked few years ago for recommendations on which to use, 63Mako suggested that one for the "186" iron heads.
howards also came back with the same cam with there online info help.
i have found that there are different lift figures given depending on where you look, even my supplied cam card was different to web sites.
i went with the 112, as i wanted the "stock'ish" manners, as at the time my rego rules were very strict for classic lhd cars in my state.
i thought AFR's were a bit of overkill for my use, same with the Profiler/ATK's.
would have gone for the new Trickflow Vintage Humps, but they were not released in time.
ended up with the bare edelbrocks and used what i could from my old setup.
after a few hrs cleaning them up, the builder is very impressed with the power from the average priced heads.
as you can see, the timing was only at 30/32*, he didn't push it to hard as it's only a cruiser not a racer.
Last edited by riverracer au; 10-25-2017 at 09:57 PM.
Reason: head info/spelling
went with a set of Edelbrock Performer RPM heads, 60889 bare, sourced local.
i was after the old school look still, so i machined the ends of the alli at work to match the old "186 double humps"
alli on left, iron on right
3 angle valve job, mild clean up of short turns, and a general de-dag of casting edges and rough spots.
installed new valves and used my springs, guide plates, studs, arms etc.
block was decked to 0.010" and with 0.020" 4v flattops gave me 10:1 comp.
edelbrock performer 2101 manifold and a Lars tuned Qjet and points dissy.
howards retro hyd roller, 111145-12.
.it made 410hp @ 5900rpm and 405ft/lbs @ 4700rpm at 32* timing, not really leaning on it..
Man thats some cool machine work to the heads! I like Edelbrock and always expect good quality from them.
HELL NO!
Even on the pictures the metal shavings are visible from space.
I'm currently deciding between blueprint engines heads and Edelbrock.
I found dealer in Europe who stocks Edelbrock heads at normal prices which means I save on tax+customs.
But blueprint are cheaper to start with.
I talked to howards cam tech and he said that I can keep my stock heads because the cam makes strong torque down low like a truck.
And if I change the heads he said that Edelbrock performer would be more than enough.
09-07-2017, 02:40 PM
