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Old 06-19-2004, 12:47 AM
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What would it take...

Im just wondering what it would take to make a 3500 lb car run a flat 12? currently im a high 13 and im seeing what else i can do. I just put in a new 350 and a built 200-4r. This is my daily driver so no huge cams or anything....the current specs are as follows...

-350 2 bolt main bored .040 (357ci)
-All ARP fasteners
-Holley 600 cfm rejetted (#70 up front, #74 in the back)
-Holley High Flow Fuel Pump (mechanical)
-Edelbrock Performer Air Gap Intake
-Accel High Output Distributor
-MSD 8.5 Race Tailored Plug Wires
-Summit Aluminum 1.5 Roller Rockers
-Dart 64cc Iron Eagle Heads
-Stainless Steel 2.05 intake and 1.60 exhaust valves
-Keith Black Flat Top Pistons
-10.5:1 Compression Ratio
-Cast Crank and Rods
-Comp 274XE Cam (.490 lift 236 duration)
-Clevite Bearings
-Double Roller Timing Chain
-Hedman Headers
-2.5" Dual Exhaust with no catalytic converters and Flowmaster 40 Series mufflers.
-Richmond 3.73 Rear end ratio
-Eaton Posi Differential
-Built 200-4R Transmission
-2500 stall
-Griffin 4 Core Aluminum Radiator
-B&M Transmission Cooler
-B&M Ratchet Shifter
-Front and Rear Sway bars

I know for sure that carb is killin me, so i want to throw a 750 edelbrock on it...im just really wondering how much of a difference it will make

Today i put 1.6 rockers on my intake, so now its a .520 on the intake side.

I dont want to use slicks, i want to be able to drive to the track and drive home w/out changin n e thing. Currently i have 255 BF goodrich radial TAs...they hook really good surprisingly

If anyone has ideas for anything that would really help. My main curiosity though is just how much of a difference that 750 will make.

Thanks a lot

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Old 06-19-2004, 12:52 AM
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assuming a 20% driveline loss, about 529 horse at the crank and about 430 at the rear rollers. That also assumes a medium sized, light-beer drinking, 200lb dude behind the wheel. Get your girl to drive it, it might go faster.

Tall order for your setup man, slicks will get you closer, as will a higher stall (I'm told), but I don't see 12.0 in that motor's future, not for that car anyway... IMO (Maybe Conservative... but I'd be happy to get in the 12's in any capacity)

K
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Old 06-19-2004, 12:56 AM
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Your carb is a major restriction. You should run at least 750 CFMs. Don't go Edelbrock. A Holley will make more power.

You will need a bigger cam. If you get over the .550" lift and 240 @.050" range it will make a big difference. You have the compression high enough that you could still maintain a decent idle with a cam at those specs.

Find areas that you can lighten the car.
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Old 06-19-2004, 01:03 AM
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damn... lol
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Old 06-19-2004, 11:32 AM
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Your intake manifold is hurting you, upgrade to the Performer RPM Air Gap. What kind of car?
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Old 06-19-2004, 03:51 PM
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more gear, and probably higher stall, heavy cars need more than 3.73 gears to get into the 12s
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'74 Gran Torino Project
351W, c6 trans, 9"
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Old 06-21-2004, 06:30 AM
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its an 87 monte carlo ss
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Old 06-21-2004, 07:46 AM
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Ok you want to buy a kit from this company http://www.ramairbox.com/ as I already said you'll need to switch intake manifolds, when you order the kit you have to know what intake you'll be running so the company knows what size drop base to include in the kit. You will need a 1" drop base for a stock hood to clear a performer RPM or a 1 1/2" to get a RPM Air Gap to clear.
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Old 06-21-2004, 09:45 AM
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How much of a difference can the RPM make? also, how much power am i losing by only using a 600cfm than a 750?
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Old 06-21-2004, 10:16 AM
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All the carbs and tuning in the world aren't going to help you if you don't find a way to lighten the load. Illuciano is right. 3500 lbs is a lot of car to move. See where you can lighten things a bit and that will go a long way towards your goal.

Chickie.
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Old 06-21-2004, 11:16 AM
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its a full frame car, what can i really take out. and what is the big difference between the performer and the performer RPM...all i thought it was was the RPM range, how can that affect the power that much? I know the Performer goes to 5500 and thats where i shift n e ways.

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Old 06-21-2004, 03:06 PM
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Quote:
I dont want to use slicks, i want to be able to drive to the track and drive home w/out changin n e thing. Currently i have 255 BF goodrich radial TAs...they hook really good surprisingly
Talk to someone that runs Hoosiers. You might be surprised.
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Old 06-21-2004, 03:38 PM
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How about modifying the seats to make them easily removable? Take them out at the track (except the driver's seat, of course), put them back in again before you leave. I'm sure if you really looked you could find other things that will lighten the load and still keep your car street legal. Of course if you really want to go all out you could look into a tube frame.

Chickie.
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Old 06-21-2004, 03:52 PM
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You're right, this is a car you are going to drive every day there isn't much you should remove or replace to lighten it. Tearing out most of the interior, a/c, heater, inner fenders, stereo, speakers, ect. Would only take off about 200 pounds, .2 of your et. Not the right route to take IMO.

The Performer is isn't much better that an stock 4 barrel intake, the Performer RPM is designed for performance and will give you more all around power. http://www.73-87.com/chp/dyno3.htm look at test 2 and 3, the difference between the test are they went from a Performer to a Performer RPM and switched to a Holley(which probably only added a few horse power, the majority of the increase is because of the intake.
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Old 06-21-2004, 05:42 PM
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not much HP gain, but getting 20 lb/ft from an intake is pretty impressive.
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