Pump gas BBC street motor

[brokeNslow]

Allright I have decided I want to put together a street machine that will see the track also.

The following limitations apply:
93-octane
Needs to be drivable on the street
Solid rollers are fine
Prefer stock angle heads (BMF, Pro 1's, etc)
9.8" deck block

This will be going in a 3200 lb stock-suspension 91 stang GT.

I want it to go in the 9's on horsepower and be able to get sprayed into the 8's on good gas. This will see probably 50-100 street miles a week and the track maybe 4-5 times a year.

Budget is 12k and that includes distributor/carb setup.

My initial thoughts are 582 inches (4.600 x 4.375), dart big m or merlin 4 block, BMF 350 cc heads, eagle rods/crank, and some pistons (JE, Ross, whoever). Shooting for 10.5-10.75:1 compression.

I am thinking I will need 700-750 at the crank to go 9's at 3200 lbs with a glide and a ford 9" making up the rest of the drivetrain.

What would you do given the budget and other limitations?

[Ron C.]

On your budget I'd go the ProCharger route. Do a blow thru carb deal. It's one way you can have your cake and eat it too and get were you want to go.

Blessings..........Ron Clevenger.

[brokeNslow]

On your budget I'd go the ProCharger route. Do a blow thru carb deal. It's one way you can have your cake and eat it too and get were you want to go.

Blessings..........Ron Clevenger.

I want to go in the 9's on the motor on pump gas. If my budget can't get me there, then I'll spend more. It seems like throwing a blower on will just add a lot of complexity and more parts that can break and take up space in the engine bay. How do blow-thru carbs behave on the street?

[CamKing]

I'd get a head that flows 420+@.600" and a cam that's around 270/278@.050"
This would give you the 750hp@ 6,500rpm, and you would need a carb that could supply 1,100cfm.

[longrodsbc]

Or you could go BBF, http://460ford.com/ you would be amazed at the power and reliabilty a Potent BBF ford will produce with a stock block.

lomgrodsbc

[brokeNslow]

Or you could go BBF, http://460ford.com/ you would be amazed at the power and reliabilty a Potent BBF ford will produce with a stock block.

lomgrodsbc

Gotta be a Chevy. That's one requirement I forgot!

[hsutton]

Or you could go BBF, http://460ford.com/ you would be amazed at the power and reliabilty a Potent BBF ford will produce with a stock block.

lomgrodsbc

There was a guy that came to the Clash of the Titans race in a Mustang with a big block Chevy. He bought the engine from a Chevy racer in Houston and said, unlike the Ford big block, the big Chevy seems unbreakable. He broke the big Ford engine several times. I liked what i saw of the aftermarket Ford blocks on Jon Kaase's website though.

[Procision-Auto]

When you say this must be "driveable on the street", do you also mean street
legal and emissions legal?

Is the goal something you'll be able achieve using a slick when on the
race track, and appropriate exhaust design?

I'd also vote for boost to keep the engine manners somewhat decent
on the street. Your goal is a challenging one I must say, especially
with budget restrictions. I'm sure you'll do well, especially with everyone
here helping out.

[67RS502]

At 3200lbs you'll only need 600-625 flywheel hp to get there, which is pretty easy with a pumpgas BBC, add good heads and 700 is there. If on a budget get a 502 block, or do a 454block with 4.25" stroke for a 496, and save the $ for heads. 500cubes will make over 600hp and get you in the 9s. Then just add a 300shot

[brokeNslow]

When you say this must be "driveable on the street", do you also mean street
legal and emissions legal?

Is the goal something you'll be able achieve using a slick when on the
race track, and appropriate exhaust design?

I'd also vote for boost to keep the engine manners somewhat decent
on the street. Your goal is a challenging one I must say, especially
with budget restrictions. I'm sure you'll do well, especially with everyone
here helping out.

Street legal to me means I can drive next to a cop and not get pulled over. They are pretty liberal about that where I roll around so that's not a big deal. It doesn't have to be emissions legal.

I will be using et streets at the track (same compound as the slick) and the car will have all the necessary chassis/suspension upgrades.

Budget isn't really a restriction more like a semi-firm kind of number. Is 15k okay? Yes. Is 18k okay? No.

At 3200lbs you'll only need 600-625 flywheel hp to get there, which is pretty easy with a pumpgas BBC, add good heads and 700 is there. If on a budget get a 502 block, or do a 454block with 4.25" stroke for a 496, and save the $ for heads. 500cubes will make over 600hp and get you in the 9s. Then just add a 300shot

Can you go into specifics on this? Is the 502 block going to be rock solid reliable or should I go with the merlin/dart block and just pay a little more? I am not opposed to incorporating used parts into this setup in order to save cost.

What heads?

[Big Speed]

572 tall deck 4.5-4.5 Afr heads mech roller 10.20 cr 93 octane made 850 hp 15 more with vac pump . ran 9.42 at 143 1.32 60ft in 3700#69 camaro .no power adder cost 17,500.00. steel cap block jesel rockers very streetable

[brokeNslow]

572 tall deck 4.5-4.5 Afr heads mech roller 10.20 cr 93 octane made 850 hp 15 more with vac pump . ran 9.42 at 143 1.32 60ft in 3700#69 camaro .no power adder cost 17,500.00. steel cap block jesel rockers very streetable

Sounds like a badass setup. Was it a crate motor or anyone that has a website I can check out?

[Fatman]

At 3200lbs you'll only need 600-625 flywheel hp to get there, which is pretty easy with a pumpgas BBC, add good heads and 700 is there. If on a budget get a 502 block, or do a 454block with 4.25" stroke for a 496, and save the $ for heads. 500cubes will make over 600hp and get you in the 9s. Then just add a 300shot

I was also thinking along these lines. I thought about 650 hp would get you into the high 9s @ 3200 lbs. This should be doable with a pump gas BBC.

For streetability, i'd build it big and also make sure you build a quaility short for if/when you want to up the power later on.

If you built 570-580 cu in range, that will be a reasonably mild motor to get to that 650 hp mark. You don't need anything trick in the cylinder head department. An as cast head like a dart pro1 should be OK and will keep some cost down, maybe treat them to a quick port clean up.

What drivetrain will go behind it?

Make you head selection based on your drivetrain and rpm range.

[brokeNslow]

At 3200lbs you'll only need 600-625 flywheel hp to get there, which is pretty easy with a pumpgas BBC, add good heads and 700 is there. If on a budget get a 502 block, or do a 454block with 4.25" stroke for a 496, and save the $ for heads. 500cubes will make over 600hp and get you in the 9s. Then just add a 300shot

I was also thinking along these lines. I thought about 650 hp would get you into the high 9s @ 3200 lbs. This should be doable with a pump gas BBC.

For streetability, i'd build it big and also make sure you build a quaility short for if/when you want to up the power later on.

If you built 570-580 cu in range, that will be a reasonably mild motor to get to that 650 hp mark. You don't need anything trick in the cylinder head department. An as cast head like a dart pro1 should be OK and will keep some cost down, maybe treat them to a quick port clean up.

What drivetrain will go behind it?

Make you head selection based on your drivetrain and rpm range.

It seems like you could almost make 700 hp on accident at 540-580 cubes. That is 1.3 hp/cube at best and that doesn't seem like a tough feat with some of the parts that are available.

What I'm saying is if I don't need anything trick in the head department to hit 650, what happens when I use a trick head like the big BMF's or the pro 1's / afr's?

Drivetrain will be a glide with a ford 9". PTC stall.

[Fatman]

Converter size? Max rpm?

The attainable Hp will depend on the engine builder and parts used of course.

You could give two builder the exact same components and end up with very different results.

I think there would be quite a few builders who could get 750-800 hp out of 570-580 inches with pump gas. Others will make less HP with similar parts.