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If you remember, last fall the car went 11.84 @ 119.27 in -160'/45°F air (4100 lbs) 11/5/2021. Recently, the car went 11.72 @ 120.0 mph in 2700'/85°F air (4110 lbs) at the FAST Spring Nationals at US131 Motorsports Park in Martin, MI 5/12/2022. The car still sends power through the factory converter, 2.56 gears, and 225/70-15 Cooper Cobra tires.
This jump in performance is very significant, especially considering there has been no tuning in the car.
The added motivation comes by way of a factory oval port-headed, VortecPro 510 CI engine, which makes 640 hp @ 5600/5700 rpm, 680 ft-lbs @ 4200 rpm.
Installed the engine as soon as we returned from TX.
Drove 190 miles to the track, raced with a tachometer for the first time in the Monte.
Unloaded, ready to go.
Yes, still sporting the obligatory stock tires (225/70-15 Cooper Cobras)
It comes out of the bottom very well. Traction off the line was definitely a little more complicated than with my 496. The engine is running out of fuel (or cam) at 1200 feet, which is keeping the mph down. The next race will have 275/60-15 (28") Mickey Thompson ET Streets which should help the engine from reaching the 6300 rpm where it hits the wall.
Successful first outing with the new 510 CI VortecPro engine. Drove 190 miles to the track, and raced with a tachometer for the first time with the Monte.
Highway rpm with the 2.56 gears.
Unloaded, ready to go.
It comes out of the bottom very well. Traction off the line was definitely a little more complicated than with my 496. The engine is running out of fuel at 1200 feet, which is keeping the mph down.
So this being an Olds forum, how would one take a '70 W30 with stock converter and say 3.08's and run in the 11.70 range and still be docile enough for your daughter to drive it???
I looked at the VortecPro 455 build with the Eddy heads and W30 intake, but that is down on power to these chevies? Or just Torque Strom it and be done?
Location: Colorado Springs Colorado/Thousand Oaks Ca
Posts: 1,719
Originally Posted by New2oldsw30
So this being an Olds forum, how would one take a '70 W30 with stock converter and say 3.08's and run in the 11.70 range and still be docile enough for your daughter to drive it???
I looked at the VortecPro 455 build with the Eddy heads and W30 intake, but that is down on power to these chevies? Or just Torque Strom it and be done?
I will take a stab at this, but keep in mind this Monte Carlo goes through the traps in second gear, and the trick here is to have enough low end grunt to launch the car with the stock 1300 stall converter and 2.56 gear but at the same time be able to turn 6300 RPM in the traps with the small 228 @ .050 hyd roller cam, with the factory GM oval port heads. And then theres the fact as tuned on the dyno it made 643 HP and 692 TQ with a 550 RPM idle. So to answer your question: If you could get a Oldsmobile production F head to flow 320 + CFM @ 28 inches into a 4.185 bore @ .550 lift with a 312 feet per sec over the short turn and get it to turn 6300 RPM in the lights, sure you probably could.......
What’s the comp ratio on the new engine and fuel used?
it’s a TQ monster for sure.
10.2:1. Drives on 93 octane to the track, drop in a few gallons of 110 Cam 2. The high octane fuel is really for the first 30-50’ at the track with the high cylinder pressures and loading that’s possible with a prepped track. Timing is locked at 35°.
Last edited by Dragginwagon406; May 26th, 2022 at 05:35 PM.
I will take a stab at this, but keep in mind this Monte Carlo goes through the traps in second gear, and the trick here is to have enough low end grunt to launch the car with the stock 1300 stall converter and 2.56 gear but at the same time be able to turn 6300 RPM in the traps with the small 228 @ .050 hyd roller cam, with the factory GM oval port heads. And then theres the fact as tuned on the dyno it made 643 HP and 692 TQ with a 550 RPM idle. So to answer your question: If you could get a Oldsmobile production F head to flow 320 + CFM @ 28 inches into a 4.185 bore @ .550 lift with a 312 feet per sec over the short turn and get it to turn 6300 RPM in the lights, sure you probably could.......
I love this car.(Monte Carlos are cool) I grew up learning to drive in a 69 SS427 Impala which had a 2.56 gear. It was a dog (for a big block) off the line. Now I have a grandma green 67 Cougar with 2.80 gears. That's how I found this thread. Love to try my hand at a smaller version of the M-C sleeper with 408 power in my Cougar. (Apples and Oranges LOL) Thanks for the info!
Last edited by nonhog; July 11th, 2022 at 06:46 PM.
Was talking with some friends about my build on the weekend, and comparing with this. I know this is a sleeper/highway car and all, but Question is:
Could you not get the same style of results with a MSD box and say 2 different tunes. Keeping the stock converter, but say 3.73 and 200r4, you have one turn for max power if your running a slick or want to do a rolling burnout at the cruise night, and another tune that drops X amount of timing to stick the 225 radial tire?
Just thinking outside the box. One could use the "nitrous" path on the MSD to kill power to hook the 225 tire. BUT if you have a 275 drag radial you could leave a bit harder, and ramp timing back in like with a nitrous car? It doesn't need to be an exact comparison to this, just a different option to get a docile enough engine/car to run well, both racing and highway.
Was talking with some friends about my build on the weekend, and comparing with this. I know this is a sleeper/highway car and all, but Question is:
Could you not get the same style of results with a MSD box and say 2 different tunes. Keeping the stock converter, but say 3.73 and 200r4, you have one turn for max power if your running a slick or want to do a rolling burnout at the cruise night, and another tune that drops X amount of timing to stick the 225 radial tire?
Just thinking outside the box. One could use the "nitrous" path on the MSD to kill power to hook the 225 tire. BUT if you have a 275 drag radial you could leave a bit harder, and ramp timing back in like with a nitrous car? It doesn't need to be an exact comparison to this, just a different option to get a docile enough engine/car to run well, both racing and highway.
Getting the same 1/4-mile performance is easy. Getting the same 1/4-mile performance on Cooper Cobras is a little more challenging.
Now do it in a package that’s happy to cruise down the highway at 90 mph with a simple 3-speed transmission using the original converter and gear with an engine which will idle at 450 rpm in gear and makes 15” of vacuum at 900 rpm. This car is simple and driven, a lot.
Your car, your build. There’s a balance point where torque exceeds the available traction for the chosen tire and surface, and it will kill ET. I had a learning experience this past weekend. Here are a couple examples…airport runway, with 275/60-15 ET Streets. We’re making some power, and I’m smooth of the throttle.
One thing the F.A.S.T. Guys do is go real big on the cam which hurts low end TQ. That way they have an easier time of getting off the line without blowing the tires away
A wide LSA , like in the 118 range, with a tighter than normal converter , big duration all let’s them roll into the throttle with the power gradually applied to the tires.
tuning with a box that has big retard in first gear down low, then comes in after the car is out of the hole is actually your traction control,, crank it up if the track is good
Last edited by CANADIANOLDS; August 9th, 2022 at 06:31 AM.
Yes Dale, that is correct. My F.A.S.T. style 785Hp '69 ZL1 makes some damn nice power with GM OEM ported heads and intake. Cam is 114. I did it more to see JUST HOW MUCH power a GM engine can make with GM OEM BLOCK, HEADS AND INTAKE and production 4" stroke. Steel block would have been well past 800Hp as we think the OEM aluminum block is moving around.
The timing thing is what I was getting at to pull timing in first and ramp it back in as tire speed goes up. I was talking to Andy Jensen about his 1967 BB Turbo Chevy II. Car runs on pumpgas and low boost, like 4 lbs. But he has a sperate 3 gallon Methanol tank, injectors and ignition box that he can turn on at a street light and tune his 6 second pass. Can a nice street car, flip a toggle switch on the column, RACE MODE engaged.
I fully understand why Draggin did this. And it's his car. I see a 9 second street car with just a few changes and refinements. I don't need to cruise @ 90MPH on the highway when our limit is 62. So if I can cruise easy at 75MPH I'm good with that. I wouldn't want a car that idles that low either, that's just me.
So with the OLDS deal, I would like 800RPM idle, enough vacuum for PB, and cruise on the highway at 75 at about 23/2500. Still be running a stock GM torque converter.
May 23rd, 2022, 07:54 PM
