What Would Be A Good Combo For A Bbc???

[pw_Tony]

Alright I have to rebuild this .020 over 454 I have. I have 118cc Oval port iron heads, and I'm not sure what cam/ compression should I get to reach the 500hp mark? I'm pretty skilled with porting, but do I have to go a bigger valve size from a 2.08 to reach around the 500hp mark? I already have a hydraulic cam Crower which is bout a int:0.515 ex:0.035 lift and duration at .050 intake:222 exhaust:228. Is this cam worth a crap?
Would solid lifters work on a hydraulic profile, if so how much spring pressure should I have?
Should I get higher than 9:1 comp?
I was thinking a good standard Victor intake, good or no?
Any good budget combos would be nice, or possibly what set-up you're running
Thanks,
Tony

[Taylorman]

I don't know crap but what would solid lifters on a hyd cam do?

[SGV40oz]

if u call comp cams and tell them what u got theill set u up perfect. i called them and told them what i had and they hit the cam right on the button. i got the whole kit for under 500 bones. cam, lifters, timing chain, valve springs, and all my retainers.:idea:

[SmokinLowriderSS]

Alright I have to rebuild this .020 over 454 I have. I have 118cc Oval port iron heads, and I'm not sure what cam/ compression should I get to reach the 500hp mark? I'm pretty skilled with porting, but do I have to go a bigger valve size from a 2.08 to reach around the 500hp mark? I already have a hydraulic cam Crower which is bout a int:0.515 ex:0.035 lift and duration at .050 intake:222 exhaust:228. Is this cam worth a crap?
Would solid lifters work on a hydraulic profile, if so how much spring pressure should I have?
Should I get higher than 9:1 comp?
I was thinking a good standard Victor intake, good or no?
Any good budget combos would be nice, or possibly what set-up you're running
Thanks,
Tony
My 454 is unbored, making 400 HP, on unported heads (porting to be done this fall).
I should have no trouble seeing very close to 500HP, if not more, from moderate head work.
My engine:
454, stock bore/stroke.
8.3:1 CR (stock flattops)
P/N 353049 large oval heads, stock, 2.06"/1.72" valves. Get a stage 1 job done, and put the 2.19"/1.88" valves in them. Don't hog the snot out of them.
Comp Cams Hy-Tech Stainless Steel roller rockers & Polylocks.
ARP Pro series 1.900" rocker studs (longer than stock).
3/8" pushrods.
Custom grind Hydraulic Iskendarian cam kit from Hi-Tech Performance. .565" lift, 232* Dur, very aggressive ramp rates, NOT a shelf 280H grind.
Isky Superlifters,
Isky matching springs (130# closed, 400#/inch rate, arround 350# open)
Stock I-beam Chevy Rods, 3/8" ARP Wave-Lock bolts in them.
Comp Cams Billet double-row full roller timing chain w/ 9 adjustments AND Torrington bearing.
Edelbrock Performer RPM Air Gap 2.0 manifold for large oval heads.
Lightning Performance thru-transom headers with 4" exhaust outlets.
Holley 700CFM 4150 double pumper, manual choke locked open.
3cc accel pump in front, 5cc unit in the rear, center hung floats. 68/78 jets, 6.5 power valve in the seccondaries
NOS Sniper plate Nitrous system (500HP with this live) under the Holley.
K&N Filtercharger atop the Holley
MSD Pro Billet Marine Ready to Run distributor, High-Vibration coil, and MSD Super Conductor wires. 12* base timing, 25* centrifugal advance from about 1300 to 2700. The seccond most aggressive advance the dist had available.
R-43TS extended tip plugs.
Engine starts instantly warm, and not hard cold.
Idle is about 850, with some lope.
Engine pulls instantly from idle, no bogs or holes.
Revs to 5-grand max almost instantly against the jet.
I pull an aggressor "B" (berk A cut) 5,000RPM on the motor alone, 5,400RPM on the nitrous 100HP jets. That's 400/500HP.
My heads are going to Saum Engineering here locally. He has done jet boat heads for Hi-Tech for a ton of years. Even without valve changes his head grinder says 75 to 85 horses are hiding in there at 5,000RPM. Easilly a hundred or more with the larger valves. I'm planning on Manley Pro Flow valves with the reduced stems in the bowl area, to maximize the porting work.
That's what I think you should build, because it is working exactly this way for me.
The carb will be a bit small once the porting is done. I will be looking at 800CFM. IMO, more will be too big except for a racing only aplication.
Oh yea, build it for 10.5:1, and run 91 octane. 550 to 600HP is entirely possible, no nitrous.
Get a good set of deck height measurements BEFORE you buy pistons (from an old set of flattops maybe, or the current pistons) so you can get decently close on the CR. Estimating a 0 deck height and actually having a -.020" KILLS the CR.

[AZKC]

Alright I have to rebuild this .020 over 454 I have. I have 118cc Oval port iron heads, and I'm not sure what cam/ compression should I get to reach the 500hp mark?
Comp Cams is a good place to start, the custom grinders do a good job also.
I'm pretty skilled with porting, but do I have to go a bigger valve size from a 2.08 to reach around the 500hp mark?
Yes, bigger valves
I already have a hydraulic cam Crower which is bout a int:0.515 ex:0.035 lift and duration at .050 intake:222 exhaust:228. Is this cam worth a crap?
Not for 500hp
Would solid lifters work on a hydraulic profile, if so how much spring pressure should I have?
Not only no but hell no, ramp angles and stuff not compatable.
Should I get higher than 9:1 comp?
Yes
I was thinking a good standard Victor intake, good or no?
Should work ok to make 500hp probably need an 850cfm carb.

[pw_Tony]

So basically start from scratch.... damn:mad:

[Beautiful Noise]

So basically start from scratch.... damn:mad:
Break Out Another Thousand OR SO :rolleyes: :D what the heck it's only a Boat :D :D

[shaun]

If your talking about a roller setup, yes solid roller lifters will work on a roller hyd cam profile. I actually choose to go this way, i was told it's the best of both worlds.
Chris Straubb's Says...
"Don't have to run aggressive spring pressure, seat# somewhere around 160# works great since the rams are not as aggressive on a hyd roller. More stable power in the higher rpm range which in the case of a jet or a V is nice. In some cases the solid roller lifters are cheaper."
Also, contact chris (cstraub69) and ask him about getting a custom cam designed/made for your build!

[396_WAYS_TO_SPIT]

We did a mild bbc and it was a head turner. here's what was inside if I can remember everything....
BBC 454 bored .060 over=468 cubes
large ovals with 2.19/1.88 valves
comp cam hydraulic flat tappet 245@.050,.575 lift,110 lobe
comp lifters,comp pushrods,comp springs,comp roller tip rockersarp head bolts and rocker studs
speedpro's 10-1 comp slugs
stock bbc rods resized with arp bolts
line hone with arp bolts
fully balanced
weiand stealth dual plane intake
holley 750dp carb
dooley 10qt pan
msd 6al box,wires,coil and pro billet dist
bassett headers with water ran through them
This setup ran 72mph in a heavy old 18ft kachina. It idled a little choppy and sounded bitchin. It pulled hard from idle all the way throughout the rpms. It spun a berk "A" impeller 5200 r's.

[pw_Tony]

We did a mild bbc and it was a head turner. here's what was inside if I can remember everything....
BBC 454 bored .060 over=468 cubes
large ovals with 2.19/1.88 valves
comp cam hydraulic flat tappet 245@.050,.575 lift,110 lobe
comp lifters,comp pushrods,comp springs,comp roller tip rockersarp head bolts and rocker studs
speedpro's 10-1 comp slugs
stock bbc rods resized with arp bolts
line hone with arp bolts
fully balanced
weiand stealth dual plane intake
holley 750dp carb
dooley 10qt pan
msd 6al box,wires,coil and pro billet dist
bassett headers with water ran through them
This setup ran 72mph in a heavy old 18ft kachina. It idled a little choppy and sounded bitchin. It pulled hard from idle all the way throughout the rpms. It spun a berk "A" impeller 5200 r's.
That sounds like the set up I'm looking for! I wanted a lump to my cam (mostly for sound, yah gay I know) but I wasn't sure if it would be wise with an A-impellar. Are the speed pro pistons cast? And how much does a set of those cost?

[bahner78]

pw has it right pretty close to my set up and works great

[bahner78]

[B]excet im running solid cam

[pw_Tony]

pw has it right pretty close to my set up and works great
You have a combo close to Spit's?

[RCB19]

600 or so is feasible with a well thought out 468 9.5 to 1 with production large oval port iron heads and a flat tappet solid cam single carb setup.

[pw_Tony]

600 or so is feasible with a well thought out 468 9.5 to 1 with production large oval port iron heads and a flat tappet solid cam single carb setup.
Ummm I don't believe that but you can explain some specs and I might:D

[SmokinLowriderSS]

If he bought the Speed-Pro POWERFORGED pistons (arround $40-$45 each), than they are forged, not cast.

[hotbo]

well this is my motor.119cc 781 heads mild port match 2.19-1.88 valves.compression is 9.1 at zero deck.i have kb pistons been runningthem for years never had problems with them run nos on them all the time 150-200 shot has no affect on them.anyway it .60 over stock rods stock crank.air gap 750 proform carb.nx plate system.
cam shaft selection is the key.:D i run only comp and they will custom grind me any cam i want to my specs.but here we go my cam is the 294s.i hate hyd.anything.save your money on the hi-tech cam:jawdrop: .248-248-595-595.110 lobe sep.installes on a 106c.now this turns my b agreesor 5450 on motor.the desktop dyno says im puttin out 516hp and 526lbt torque.all of this on a 9.1 motor.another good off the shelf cam is the comp.282s.236-236-561-561.110ls-106cl.these are flat tappet cams not rollers.i know thats not alot of power to alot of you big wig boys.but he wants 500horses cheap im close to it and didnt cost alot of money.

[bajarunner]

Here’s a combo that should fit your needs and budget, I now this is in short but it’s the basis. It sounds like you want a user friendly, fast, reliable, choppy idle, river boat correct? I would run a “B” cut on the impeller with either cam selection. I have used the flat tappet combo in a few jets and for the money it hauls the mail, and the customer feedback was very positive! It has a choppy idle which you indicated you would like to have. I can tell you either cam will get the job done. One last thing, in a marine engine be vary careful as to what valves you use. Broken or “dropped” valves are a common problem usually due to improper valve selection. You can PM if you would like more info.
•454 +.060 = 468
•Probe SRS 9.5:1 pistons (Stronger than speed pro, lighter, and cheaper too. Run on 91 pump all day with iron heads).
•Large oval heads with larger valves 2.19 x 1.88 properly ported. As a option I would recommend a new set of complete heads, I don’t feel you can save so much as a dollar fixing up and porting old heads, but this is up to you and your resources.
•Stock bbc rods with ARP bolts
•Weiand stealth single plane intake (allot better on the top end HP than dual plane)
•Demon 850 carb (marine)
•Lighting double wall headers (if out of $ go with rewarder headers)
•ARP engine hardware throughout (Good hardware is critical in any combo)
•Melling10778 pump (The 10700-80 is allot better but you will need allot more $)
•Cloyes double roller chain with premium billet gears.
•PRW ZD stainless steel roller rockers
•PRW rocker stud girdle (good product, good price)
•Lifters, Crower roller with oiling hole option.
•Now the cam part, I don’t use production cam companies there to unreliable, so I use custom grinders and have for years to be application specific. I use Engle cams in Santa Monica.
Mechanical roller
Engle RJ 36/38 Int @ .050 = 248* Ext @ .050 = 252*
Int lift @ cam = .375” Ext @ cam = .379”
Int lift @ valve = .640” Ext @ valve =.644
LCA w/injected headers = 112
LCA w/double wall headers = 110
If you choose to go the flat tappet route this is a great cam, be very careful on who’s lifters you purchase with any flat tappet cam!!
Solid flat tappet lifter. (non-roller)
Engle HL 25-26 Int @ .050 = 242* Ext @ .050 = 252*
Int lift @ cam = .330” Ext @ cam = .342”
Int lift @ valve = .560” Ext @ valve =.580
LCA w/injected headers = 112
LCA w/double wall headers = 110

[pw_Tony]

O.k. that sounds good. Can those pistons clear a 0.650 lift? And are cast oval ports even any good up to a 0.650 lift? I'm pretty skilled with porting, but I'm not sure if they would help that high. And what kind of valve spring seat pressure would I need to run a solid lifter, or what pressur for a solid-roller, or a solid roller on a hydraulic profile? And what brand lifters would suit a jet boat good?

[Jetaholic]

Here's my motor. Calculated to produce 500 ft lbs @ 4500 RPM and 500HP at 5500 RPM.
454 bored .030" over
Stock crank & rods
TRW/Speed Pro L2465F forged dome top pistons
Plasma moly rings
353049 Heads
2.19" intake/1.88" exhaust valves
Clevite bearings (std size)
Powerforce harmonic balancer
Iskendarian 280H Mega cam custom ground for Hi-Tech Performance with more aggressive ramp rates:
Hydraulic flat tappet cam
280 seat-seat duration
232 .050" duration
.565" lift (with 1.75 rocker ratio...I'm running a 1.7 so I have about .549" lift)
60* overlap seat-seat, 12* overlap .050"
Intake opens 30* BTDC seat-seat; 6* .050"
Intake closes 70* ABDC seat-seat; 46* .050"
Exhaust opens 70* BBDC seat-seat; 46* .050"
Exhaust closes 30* ATDC seat-seat; 6* .050"
Cam is installed 4* advanced
Iskendarian Super Lifters, anti-pump up
Comp Cams Magnum push rods
Iskendarian dual valve springs (385 lbs open spring pressure)
Scorpion Roller Rockers
Comp Cams double roller timing chain
Bassett water injected over transom headers
Edelbrock Performer RPM Air Gap manifold
Holley 4150 750cfm double pumper carburetor (marine)
MSD 6M-2 Marine Ignition Pulse Amplifier
MSD Ready To Run Distributor
MSD Blaster 2 High Vibration ignition coil
Hardin Marine thermostat kit
This combo I must say is a very torquey combo and if you already have a block it would only run you about $3,500 to build.

[pw_Tony]

$3500 :jawdrop:

[JetStalker]

This combo I must say is a very torquey combo
Yes it is very torquey, and I have the burn to prove it!!
I went with him last Sunday out to do a final test on the engine and make sure there were no leaks... he doesn't have the gas pedal in yet so he was gunning the engine with the throttle linkage...he told me to try to do it. Instead of telling him "no, I have no idea what I'm doing" I said "OK!" cause I'm retarted...I pushed it back too hard, which caused the boat to jump forward...and me to fall back. My elbow when straight into the header right where it starts to curve over the engine....OW! I think my skin is stuck to the pipe...I am now officially part of his boat. :) It's pretty bad ass though...everywhere we go people stop what they're doing to look at it....:D

[Jetaholic]

$3500 :jawdrop:
That's for all the parts + all the machine work.

[pw_Tony]

That's for all the parts + all the machine work.
Did you have to buy the block and heads as well?

[Jetaholic]

Did you have to buy the block and heads as well?
Yes I did. I bought the complete motor from a guy who had pulled it out of an RV. It had the small oval port heads, so I found a set of '049' heads on eBay and snagged them up. The guy sold me the motor for $300. He was gonna rebuild it but got a deal on a complete 454 and installed that instead. The motor sat for about 3 years in a storage bin with the heads off of it. I sent it to a buddy of mine who ordered all my parts and did all my machine work.

[MWJSOne]

Gen V block off ebay 150.plus the 100 in fuel to chase for it this was pretty much a complete engine with heads
Gen V steel crank off ebay 125 plus 25 shipping
3/8ths rods 50
12 to 1 trw closed chamber pistons from swap meet 65
roller cam from comp 165 solid rollers 100
rec port heads 750 off ebay
roller rocker and stud girdle 200
bore job and machine work 700
custom 950 quick fuel carb over 500 porting job 300 my cousin dose head work and built the carb from pieces
street Dominator inake 125 off ebay
swap meets and ebay :D