My BBC progress

General engine tech -- Drag Racing to Circle Track

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prairiehotrodder
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Location: melfort saskatchewan Canada

My BBC progress

Post by prairiehotrodder » Sat Feb 09, 2019 1:33 pm

I just am so happy that speedtalk is back. I want to post an update on my build a progress and my plans for the next season.

My motor was a pump gas 540 with AFR 335 heads and a tunnel ram in an 81 malibu

I went 9.72 at around 137 last summer best.

This winter my motor came apart for major changes :
bore 4.560 with mahle pistons and skinny rings
new cam Erson custom 280 / 288 @ .050 .730 / .760 lift 112 LSA in the motor at 108 ICL
new trend heavier wall pushrods
Moroso power pan with side kickout for oil control
mild smoothing of runner entrances in tunnel ram plenum
CR changed to 12.9 planning to use 100 octane AV GAS.

I just got the motor running again 2 days ago but racing season doesn't start until mid may.
The Word of God is quick and powerfull
www.therocketshop.blogspot.com

steve cowan
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Re: My BBC progress

Post by steve cowan » Sat Feb 09, 2019 3:46 pm

Hi Brian,
i have been following your car for last couple of years,shes a bad beast
good luck this year,what are your thoughts 9.50s @ 140mph ??
i would be interested to find out if your compression and cam changes will move peak rpm and shift points compared to previous setup all else being equal,rear gear,converter etc.
steve c

prairiehotrodder
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Re: My BBC progress

Post by prairiehotrodder » Sat Feb 09, 2019 4:11 pm

Thanks Steve, whats the weather like down under ? This week has been the coldest i've seen in a long time. Its been - 38 C every morning.

According to my friend "old school" who has coached me through this build, I should gain around 80 hp at least from my changes. It should hold the power longer after peak power which should make my car faster. And if i can hook it there should be more torque off the starting line. I'm hoping for low 9's. Maybe will make around 800 - 850 hp. I liked to dream the old motor was making 800 hp but i think in reality it was more like 700.

A couple changes i might have made if i had the money was to go to the next step AFR heads which were the 357 CNC heads and maybe try the newer design Edelbrock #7085 tunnel ram. However its back together now and i already spent way more than i should have. Tubbing the car might also soon become necessary but i really don't want to go there.
Brian
The Word of God is quick and powerfull
www.therocketshop.blogspot.com

steve cowan
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Joined: Wed Jul 27, 2011 5:22 am
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Re: My BBC progress

Post by steve cowan » Sat Feb 09, 2019 5:15 pm

Brian,
we are the other end of temperature over the last couple of months + 35-+40 deg C
plus a lot of humidity,February is a pain.
Our street car bracket series started last weekend it was still 36.4 deg C at 5pm.
thanks for the follow up information,sounds like you have a well thought out plan and cant wait to see the ETs tumble,best of luck
steve c

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