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buzzardman

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Discussion starter · #1 ·
hey guys im new to the board thought this might interest u .my new engine dynoed just yesterday.
engine is 540 bbc on pump gas
gm 502 block gen 5 bored 4.5
4340 scat stroker crank 4.25
srp pistons 10cc domes measured for 10.6.1 comp
edelbrock victor 24deg alloy heads 340cc intake ports
shaft mount yella terra 1.7.1 roller rockers
merlin single plane 4150 intake
carb is a quick fuel 1050 with annular boosters 4150 holley engine is pulling 2 inches of vacuum on carb so shes sucking hard on that carb may need slightly bigger carb and intake maybe?
solid roller crane power max cam part no:138781
duration@50 246 254 lift 615 636 with 114 lobe centre
srings recomended 190lbs closed 488lbs open
min rpm 3200
max rpm 6800
valvefloat 7400
crane solid roller lifters part no:13519-16
ok dyno results
max hp 646 @6000rpm
max torque 677.8 @4700rpm
this will go into full weight 73 camaro that will be street driven with trips to the drags and car shows with th400 manual shift 9 inch rear 3.7 gears and 4000 stall converter oh and there is also a gear vendor overdrive backing that all up.
ok my comments on my own engine is i think the cam is a little small and would rather have around 700plus horse power but my engine guy says this will give good street manners but it seems to me 700hp plus with street manners should be do able on pump gas seems like every one else here has 700 plus hp.
so what do u think
 
#2 ·
buzzardman said:
hey guys im new to the board thought this might interest u .my new engine dynoed just yesterday.
engine is 540 bbc on pump gas
gm 502 block gen 5 bored 4.5
4340 scat stroker crank 4.25
srp pistons 10cc domes measured for 10.6.1 comp
edelbrock victor 24deg alloy heads 340cc intake ports
shaft mount yella terra 1.7.1 roller rockers
merlin single plane 4150 intake
carb is a quick fuel 1050 with annular boosters 4150 holley engine is pulling 2 inches of vacuum on carb so shes sucking hard on that carb may need slightly bigger carb and intake maybe?
solid roller crane power max cam part no:138781
duration@50 246 254 lift 615 636 with 114 lobe centre
srings recomended 190lbs closed 488lbs open
min rpm 3200
max rpm 6800
valvefloat 7400
crane solid roller lifters part no:13519-16
ok dyno results
max hp 646 @6000rpm
max torque 677.8 @4700rpm
this will go into full weight 73 camaro that will be street driven with trips to the drags and car shows with th400 manual shift 9 inch rear 3.7 gears and 4000 stall converter oh and there is also a gear vendor overdrive backing that all up.
ok my comments on my own engine is i think the cam is a little small and would rather have around 700plus horse power but my engine guy says this will give good street manners but it seems to me 700hp plus with street manners should be do able on pump gas seems like every one else here has 700 plus hp.
so what do u think
Click to expand...
There are alot of factors that can come into play. I see you are down in Australia. What brand/modle dyno did you run on? Do you know what softwhare, and correction factor was used? As for the power it sounds a little low but not too far off. Im not familliar with those heads, but I can tell you I would not run that cam in any combination of mine where I was trying to make power. Without reaching into the bag of tricks, a similar equiped 540, AFR 305's, (modified to flow 380) Isky sldRR 266/270@.050 .697/.680, 110 will go mid 700's, and still drive to the track. I think you would be better off with a cam around 255-260ish @.050, at least .650'', 110 deg. Looks like you plan on driving long distances, but you should still be able to get away with mid 250's @.050, and .650-.660''.
 
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Discussion starter · #3 ·
superflow dyno windyn software thats all i know about the dyno its my first time.
also was dynod with 2inch headers 3.5 inch collectors.
thanks for comments i will be looking for a camshaft up grade in future so looking for recomendations. the heads are a new design from edelbrock mine are straight out of the box but they also offer this head with a chapman port job and say they can support 900hp on the edelbrock websight .
 
#4 ·
I ran that same cam in a 468 for a couple of years. It is a cam that is designed with nitrous in mind. It is smallish for a 540 but had incredible street manners in my 468, 114 ls, and with lower spring pressures for a solid roller, life on the street should be a long one. I had no issues and lash never changed with my racerites. Wish I could say the same for the solid roller I am running now.
It must be an incredibly smooth running motor. Get used to the power then make a change if ya want, enjoy it and tune the rest of the car for now.
Just my 2cents. Good luck.
 
#6 ·
I think you're down on HP for some reason - I'm no engine builder, but here's my logic:

I have virtually the identical cam as you do in my 489, same lsa, with slightly smaller duration numbers. (243/246 if I recall correctly)
I'm running a hydraulic roller (heavier) setup.
You have me by 50 ft-lbs of torque, but only beat me by 12 HP at the same 6,000 rpm's.

I think you're losing something up top, based only on the similarities in our engines - your HP number seems too close to mine, I would think it should be higher. Certainly, with a slightly different cam you'll push up your HP by moving the rpm's up.
 
#7 ·
Not bad but as mentioned the cam a little too small...need to be at least 10 degrees larger at .050". Especially with a head that large.
I'm 266/271 @ .050 with a 335cc head and still very streetable. :yes:
Not a big fan of the Merlin intake either but you've gotta use whats available down under. I would think the Edelbrock Super Vic would be a better match for those heads.
 
#8 ·
Xtreme70SS396 said:
I think you're down on HP for some reason - I'm no engine builder, but here's my logic:

I have virtually the identical cam as you do in my 489, same lsa, with slightly smaller duration numbers. (243/246 if I recall correctly)
I'm running a hydraulic roller (heavier) setup.
You have me by 50 ft-lbs of torque, but only beat me by 12 HP at the same 6,000 rpm's.

I think you're losing something up top, based only on the similarities in our engines - your HP number seems too close to mine, I would think it should be higher. Certainly, with a slightly different cam you'll push up your HP by moving the rpm's up.
Click to expand...
He also has a solid roller, and yours is hyd.
At the same duration #'s yours will act 6-8* bigger.

And more info for comparison my 496 has a 267/271 @ .050 solid roller.
That 540 should make a great smooth running street engine.
With much more power potential if desired.
 
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#9 ·
blue66 said:
He also has a solid roller, and yours is hyd.
At the same duration #'s yours will act 6-8* bigger.
Click to expand...
Interesting - how does that work?
 
Discussion starter · #11 ·
the valve float is just what it says on the cam card and power started to drop off at 6000rpm so i guess a rev limit of say 6500rpm would be the go .
the heads are edelbrocks new victor 24degree 340cc intake port ,rectangle heads. out of the box no port work just a clean up behind the valves .actual springs i did use were the crane CR96883-16 @205 on seat 505 on nose.
just think my cam is a little small the engine builder is conservative and built my engine for long life good street manners and long distance driving my drag strip is a 2.5 hour trip down a free way so its no trailer car .
motor does run smoothly and will install it this weekend .i would have prefered a more chop to the idle maybe 110 112 lobe centre cannot help thinking i let a lot of power escape me ha ha .have just been looking at the lunati voodoo they recomend for motor up to 540 cubes and duration in the mid 250s/260s 110 with around 680 lift cannot remember the part no thanks for reply just wounder if it would be long life cam .thanks
 
#12 ·
just messing around in dyno2k, a bigger cam will get you above 700hp. the numbers are right on the money with the cam you posted (d2k torque higher by about 10) but add a 260s @0.050 with a bit more lift and you are over 700hp
 
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#13 ·
might want to drifve it awhile and see how it runs out. Sure, you can up the cam into one of the newer aggressive lobes, but you might have issues with reliability. You'll need much stiffer valve springs, 230 on the seat. See post #4 from Chris: "I had no issues and lash never changed with my racerites." There's a lot to be said for that. You're driving 240 to the track? Maybe you engine builder is smarter than you think.
 
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#14 ·
The cam selected, the compression ratio, and the heads are not allowing that 540 to make attainable power. If you used a smaller intake port head with the cam and compression, you might make more power. If your looking for driveability over max performance, this would be the way to go. If you want to utilize the potential of the heads, go with a larger cam and bump the compression up. You should be safe with 11.5:1 on pump gas. Or change your rocker ratio to increase the lift. You should make great power with those heads, well over 700hp. You might need more converter as well for at the track. Has the intake and heads been gasket matched? This will build power as well. Every little bit helps build power. Just my opinion.
 
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#16 ·
I'm with everyone else....more cam would easily put you over 700HP. You could go into the mid 250's..on out to mid 260's and still idle nice with a 112 LSA. Unless it's a real big cam, I can't see going out to the 114 LSA on stuff like this when N/A/.

Mine is a 266/272 on a 112 and I'm amazed at how it idles. Actually sounds pretty wussy to me...but once it's rolling it pulls hard. A 246 on a 114 must be real tame.

All that said, it will be a great street motor and will be easy on parts. You could go a lot more on lift with no issues. Mine is currently at .774 on intakes with 1.8 rockers and the guides are the same ones Brodix installed 7+ years ago. Lots of street and race miles as well as corss country 2000+ mile trips. Anything in the .700 range ought to last forever almost. Just regularly check roller lifters and your good.


Look forward to hearing how it runs. If you do change cams, don't be scared to spin it to the 6500-7000 range at all.


JIM
 
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#17 ·
It's weird that a conservative engine builder, with reliability and durability in mind, would use a solid roller in the first place. Especially since a larger grind hydraulic roller could just have well been used and argueably produced more power too.
 
#18 ·
have just been looking at the lunati voodoo they recomend for motor up to 540 cubes and duration in the mid 250s/260s 110 with around 680 lift cannot remember the part no thanks for reply just wounder if it would be long life cam .thanks
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Click to expand...
that would be a 60234 which is what i use and its tame in a 505.

New Cam, go to a 4500 intake, and 2 1/8th inch headers and youll be aight.


its strange he went that conservative on a solid roller instead of just going to a modern hyd roller and lifter combination.

Shawn
 
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#19 ·
A few years ago, I along with plenty of others had problems with retro fit Hyd roller lifters in Big blocks. They were extreamly noisy, and in some cases would bleed down, and the plunger would stick:mad:. I got sick of it, and went to solid RR lifters on the HYD RR cam. End of problem. He might have ben plauged by that problem, and have a bad taste in his mouth.
 
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Discussion starter · #20 ·
interesting comments thanks .i let the engine builder pick the cam for me he did want to go hyd roller but i wanted a solid as i had already tried hyd roller in my 496 combo and it felt mild to me 238/244 112 with dart pro1 310cc heads only made around 500hp not enough for me .so i wanted a solid roller this time .we discussed cam specks in the 250/260 @050 range in the 110/112 lobe range so i was surprised with the cam he had picked he said he just got the biggest crane street roller they did since he had already installed it i was stuck with it.
now i am thinking this for next up grade
super victor or dart intake not sure which one
dominator 1050
lunati voodoo solid roller 60234 255/263 680/680 110 lobe
or comp 11-773-8 solid roller 292/298 660/666 110 lobe
just looking on summit racing
would consider going bigger if compression is up to it
so am i on the right track .
motor does run smooth on the dyno and i will run it for now but i dont think i will be happy till i know i make over 700hp
thanks for the comments
 
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