520BBF WHAT DO YOU THINK

Hi all, i have a 520BBF i will be posting engine specs and horsepower tell me what you think or how i can improve it.

Block:70 Standard 460 - 4 Bolt Spayed Cap Conversion,Screw In Valley Tubes,SVO Roller Cam Bearings,4.390 Bore
Heads: SVO B460 - 2.3 Intake 1.90 Exhaust Valve - 1.75 Jesel Rockers - Heads Flow INT 416cfm@750 EXH 316cfm@750 @28
Pistons:Arias Custom 13:0:1
Crank:Scat 4340 Forged Steel 4.3 Stroke
Rods:Scat H Beam 6.8 with Bolt Upgrade
Intake:SVO B460 Single Carb with 4 inch Spacer
Camshaft : Solid Roller - Duration @50 INT:274 EXH:272 Valve Lift - INT: .717 EXH: .708 Lobe seperation 110 Cam Timing Set At Zero
Lifters : Isky Red Zone Ezy Roller Bearing
Carb : 1190 King Demon
Exhaust: 2 1/4 inch Primarys Tuned Length To 4 inch Collector
Msd Distributor with Crank Trigger Timing 36Degrees
Fuel:VP C14

Engine Made 820HP@6600 715FTLBS@5700

Thanks Guys

just from what little knowledge i have i would say the weekest links are the carb and the cam ...... just my .02

but otherwise sweet build and welcome to the site

the smart guys will chime in now

bruno wrote:just from what little knowledge i have i would say the weekest links are the carb and the cam ...... just my .02

but otherwise sweet build and welcome to the site

the smart guys will chime in now

X2 Not necessarily weak links, but a little of a mismatch. A big kudo, if you are making the BG carb work for you as they seem to be a real finicky hard to tune carb.

Thanks Bruno & Schmitty great to get some feedback and even cam recommendations or carb cfm range

I'm not cam guy by any means, but is the lift and duration on that cam "backwards" because of the heads??? or just not spec'd correctly.

We have sevearal cam wizards here, and they will chime in soon I'm sure. Most of the BBF's like a little bit of favor to the ex side. Seems like anywhere from 0-10* more exhaust duration depending on the heads. The B460's are an excellent head, similar to the A460 in some respects. Who spec'ed this cam for you?

Crow Cams In Australia Specd The Cam For Me I'm No Cam Genius So I Went With It.

your build is a close one to mine,4.440x4.250.a460 heads.the cam is even close to the one i'm running now.it depends on your intent whether or not the cam is small.if you need torque you got it at a useable rpm.i'm no cam guy either but i've got 2 big comp cam's i'll probably not ever use again.your intended use will be the biggest factor.what are you running it in?

do you need to improve it? those hp/tq #'s are nothing to sneeze at!

The Vehicle is a 1971 XY Falcon 3/4 chassis ladder bar rear end weight is 3400-3500lbs i am happy with the power but if there is anything limiting it's peak ability i'd rather change it to acheive more we can always do with more power.

what rpm do you shift at & what trans you run?

Unfortunately i live in Adelaide South Australia and we have'nt had a drag strip for 10 years and we are in the process of negotiating with the
government to purchadse some land to build a new drag strip www.adelaidemotorplex.com.au so the car has been laying dorment. I am now getting inspired to put the engine back together and finish the car off. i was planning on running a rossler or neal chance powerglide want to try and keep the engine under 7200rpm.

i shift at 6600-6800 so you'll be where you wana be.good luck with it,and the track too.

Thankyou we can only hope theres alot of dorment race cars in adelaide.

XYPROSTREET wrote:The Vehicle is a 1971 XY Falcon 3/4 chassis ladder bar rear end weight is 3400-3500lbs i am happy with the power but if there is anything limiting it's peak ability i'd rather change it to acheive more we can always do with more power.

OK, I'm jealous, and I hate you.


Welcome to the site. We demand pictures, or you will be sent to that Mad Max place where Tina Turner hangs out. What do they call that?

I think it might be called the thunderdome?
I am not sure how to insert images?

That's it !!! The Thunderdome!!!!


If you get a photobucket account, it is easy. There is a sticky somewhere about it.

You could maybe pick it up a little by trying less timing. Maybe 32* as a starting point. Good Luck w/car and track.

"THUNDERDOME...!!"








Doug...

Nice numbers and welcome to the BBF Forum!

I agree with some of the others, that engine is begging for a 1250 Quick Fuel carb and more cam

You Aussies have the COOLEST cars IMO, can't wait to see pictures!

Two men enter, One man leaves

Good Morning all, love everyones feedback i posted my avatar picture in the gallery as time goes by i will post more as you can see my car still needs a little finishing as we here more on the racetrack it will motivate me to continue assembly. I would love some suggestion on cam specs as the engine is currently apart so if i have to change camshaft it won't be a problem,I wan't to stick pretty close to that valve lift as i haven't got alot of piston to valve to play with unless i retard the camshaft or fly cut pistons.


Thanks All Great To Hear From You

any updates

damn cletus,you got your women painting the car.YOU DA MAN!