New Motor Combo

I'm finally making some progress on my new blown alcohol BBC. Here is the specs on it if you guys want to take a look and see if I'm made any bad choices. Its not togther yet so I have time to change...

4.535" bore x 4.250" stroke

Callies Magnum crank,4.250",STD 2.200" rods

6.665" rod, MGP HA3000 rods,1.094" pin ends

Ross Pistons
1.395" comp height
top .17
2nd 1/16"
oil 3/16"
gas ported tops
double pin oilers w/slots
1.094" pins,.250" thk,straight wall
11.5:1 comp
Akerly&Childs HTD rings

Donovan 10.2 deck aluminium block,STD cam location,Solid casting
Donovan gear drive
Moroso billet oil pump
Billet Fab 2 peice oil pan

Brodix BB3-XTRA 380 CNC heads,solids
119cc chamber
2.35x1.90 valves
Stealth Titanium valves
PAK springs
T&D rockers
Manton pushrods
Morel .904" lifters
.830"/286 In and .790"/292 Ex with 114 LC

Indy blower manifold with valley cover
14-71 Littlefield,k-8 rotors,Davenport mods
S&K injector,K valve,setup and flowed by Davenport
MSD Pro Mag,20 amp conversion by BR Motorsports
crank support
8 mm drive

Looking to make 1800-2000hp and is going into 2000lb altered/TAFC chassis,Top dragster/match race,2 speed

 

Mac,
I think you have selected an excellent combo with your new 549 BBC. Please tell us what pump you are planning on running and what is the dome volume of your pistons?

From my calculations it appears that you will be at zero deck height. Therefore, your gasket thickness will set your piston-to-head clearance. I like to run around .080 piston-to-head clearance with aluminum rods.

Good luck, Joe

 

Enderle 110 pump


The piston specs for is as follows
dome piston
Piston to deck will be .015"
Effective volume -31.4cc
.050 gasket
Gasket bore 4.560"
Gasket volume 13.4cc
11.5:1

That would only give me .065" piston to head with the .050" gasket so I was planning on running a .062" gaskets to gain some room but will loose a little compression.

 

Mac, I stand corrected on the deck height; your right. Make sure you measure the block deck height. You don't need the gas ported pistons with your dykes top ring. The 990 pump should give you 2000 hp easily. I believe you have a very good combo.

Let us know how it performs. Joe

 

bbc set up

Mac , close to my set up 4.560 bore 4 inch stroke 526 my cam is a little bigger don,t have the specs with me.6.34 @212mph This is in a 2050lb dragster. Gary

 

What heads did you run?

 

chevy

It will run hard. Make sure the oil system is sorted out.
How much OD boost?
IMO 30 psi will make 2000hp.

 

I'm thinking 40-45% overdrive should make 30 psi


I hope I have everything sorted out in the oil system... Moroso billet pump set around 110-120 psi,Billet fab oil pan,cleaned up block allot in lifter valley for drain back. I'm going to have oil drain hoses from head to the oil pan. 3 quart Moroso accumulator, 70wt Brad Penn.
Any ideas?

 

Mac,

I am by no means a expert on this but, I have a similar set up.

582 BBC with a loose SSI 14/71 at 10% over.
We make about 25lbs boost.

The 990 pump is one size too big.

We run 20-50 Brad Penn and around 70 PSI oil pressure and no bearing broblems.

Jim

 

cyl. heads

ported profilers

 

i hope its a high helix. It should make way more air than that.
I always ran 20/50 penn oil for better drainback and switched to 60wt redline with very good results. 80 psi at the stripe.
990 is a big pump but it should have a pump sizer loop to keep everything correct.

 

Yes its a high helix retro. I might be a little high on what overdrive I need. The blower made 35psi on my 470" BBC @ 28% over. I just thought with the extra 80" and bigger heads it might take alot more overdrive.

How much oil did you run? I have low ground clearance so my pan size is limited. With my 470" setup I ran 10 quarts in the motor and a 3quart Moroso accumulator and have had ZERO bearing problems in 5 seasons but just want to confirm everything with the new motor.

Its a 110 pump with a loop on it currently setup for my 470" combo but I wil have Davenport give it a once over for the 549" setup. Once everything is togther I will book Les Davenport for the day on the dyno like I did with my last motor to get the bugs out.

 

bbc

12 qts and 3 qt accum. with kb olds funnycar pan and Titan big pump. 1/8th mile 9000 rpm.

 

I've been talking to Chase @ Crane Cams and he speced allot smaller lift cam than what I was thinking but I think I will go with his knowledge and I was very happy with my last blown alcohol cam he ground for me.


Previous specs:

.830" In 286@50 / .790" Ex 292@50 114 LC


Chase's Grind

.801" In 290@50 / .740" Ex 298@ 50 114 LC





Head Flow numbers:


BP BB-3 XTRA 380
(CNC Ported/ 45° Valve Job)


2.350 Intake

309 @400


360 @500


401 @600


430 @700


443 @800


442 @900

1.880 Exhaust


219 @400


254 @500


280 @600


301 @700


306 @800


311 @900