Gear ratio to suit 700r4 and 383 stroker - Team Camaro Tech
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post #1 of 7 (permalink) Old May 7th, 01, 06:33 PM Thread Starter
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Join Date: May 2000
Location: North Texas
Posts: 156

Man I get excited thinking about doing some major stuff to my car. I need some advice. I have decided to go with a built up 700r4. My rear gears are 3.08. I need to know if cruising at 60mph will put my car under the power band of the motor.

Here is info on the engine: 383 stroker, edelbrock performer(not RPM) intake, comp cams extreme energy 268 cam, HEI ignition, S/R torquer heads, headers, Edelbrock 600 cfm carb, 2.5" exhaust, KB hyperuetectic pistons, roller tip rockers.

This engine was designed with off idle to 5500 Rpm power in mind. I want to confirm that it won't be a dog cuising if the rpms go toward the 1800 mark around 55mph, etc.

Yes, I drive it ALOT and need to get some decent gas mileage.

Thanks for the help,
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post #2 of 7 (permalink) Old May 7th, 01, 06:54 PM
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Join Date: Feb 2001
Location: Maine
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65mph would be around 1750rpm. That shouldn't be too too low for the motor. You will definately be getting good mileage. Even with a 3.73 gear you will only be turning 65mph at 2150rpm. Great for the highway either way.
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post #3 of 7 (permalink) Old May 7th, 01, 08:10 PM
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Location: Fortuna, CA
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With 4:11's I turn 2500rpm @ 70mph. That's with 26.6" tall rear tires

'69 RS Convertible w/SS trim
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post #4 of 7 (permalink) Old May 8th, 01, 08:36 AM
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Location: Niceville Fl
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go 411. with the overdrive u have it will charge down the road hard and still get good gas milage and have a good cruising rpm. Pluss u have a 3.08 first gear and it will realy get up!

69 Camaro RS, 355ci mild cam, Preformer rpm intake, edelbrock 600 carb, 350 turbo w/ shift kit 2500 stall, 10 bolt 2.73 any more questions ask
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post #5 of 7 (permalink) Old May 8th, 01, 05:33 PM
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Join Date: Jun 2000
Location: Houston, Texas
Posts: 193

I have 3.73 gears in my 67 with a 700R4 and they work good. I have thought about changing mine to 3.42 for better highway mileage. I wouldn't go lower than 3.73 if you do alot of highway cruising. I normally drive 75 to 80 mph which is 2800 to 3000 rpm with 26" tall tires. To be honest I would try the 3.08 out first before changing the gear.

What kind of converter are you using, I've got a 2400 lockup stall in mine and it works great. I would definitly use a lockup converter if I were you.

67 RS/SS 350 700R4
69 SS clone unfinished
72 454 Weekend Racer
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post #6 of 7 (permalink) Old May 9th, 01, 04:55 AM Thread Starter
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Join Date: May 2000
Location: North Texas
Posts: 156

Thanks for the advice,

I definitely plan on a lock up converter. I'll try out the current gear since will be the equivalent of 3.73s in the TH350 I have now.

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post #7 of 7 (permalink) Old May 9th, 01, 08:57 AM
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Join Date: Dec 2000
Location: Monroe, WA, USA
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with 3.08's you will have the best of both world's with a 700R4. great launche's and awsome freeway milage...IMHO
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