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Old 08-06-2012, 10:46 AM
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long trip on high performance engine

Hey, I was planning on taking my chevelle on a 120 mile trip to cape cod. I was wondering if thats a good idea with mildly built 355-370hp. Its got a comp cam, 2.02 heads, 670 street avenger, 10.5-1 cr, ect. The car runs fine and I have tested it on the highway, but is there anything I should be concerned about when cruising at 2300-2600 rpm for 2 hours? Thanks

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Old 08-06-2012, 10:54 AM
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Should be fine just keep a eye on the temp gauge (exspecially in traffic) maybe bring a couple of gallons of water in the trunk just incase , but if you got it tuned right it should not be a problem
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Old 08-06-2012, 11:12 AM
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bring extra fluids,water/oil/atf if auto,small tool box,cell phone,lunch. I used to drive my car from Vancouver Canada to SIR and bremerton race tracks with 5.13 gears,race,drive home. tach was at 3700 most of the way there. re adjusted the valves when I got there,changed the oil when I got home.
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Old 08-06-2012, 11:24 AM
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ok, thanks. I am planning on leaving real early to avoid traffic because I can overheat with the car when sitting too long. I also have a bunch of fluids, tools, and radiator fluid.

Also, cruising at 3700 rpm for a long period of time doesn't adversely effect the piston rings?
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Old 08-06-2012, 11:32 AM
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Vancouver to SIR is 100 miles.That engine was abused and beaten up over the years I owned it.Tried lots of parts and it never came apart.7300 rpm through the traps when I put an auto matic in it later. Just change your speed every 5 minutes.your tach will be under 3k
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Old 08-06-2012, 11:42 AM
How fast is fast enough?
 
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Quote:
Originally Posted by cletusvandamme View Post
ok, thanks. I am planning on leaving real early to avoid traffic because I can overheat with the car when sitting too long. I also have a bunch of fluids, tools, and radiator fluid.

Also, cruising at 3700 rpm for a long period of time doesn't adversely effect the piston rings?
3700rpm is fine as long as you have a good tune and good oil. 75% or better of the people out there with "hot rodded muscle cars" don't have a good tune though.
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Old 08-06-2012, 04:49 PM
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I agree that really is not that bad of a rpm too hold if like ap72 said you have a good oil and a good tune I don't think you'll have a problem as long as everything is up too par. I drove a little v-8 vega coupe that I recently sold to my brother to crusin the coast in mississippi last year and it had a 3400 stall with a 350 engine 350 tranny and 4.56:1 gears and 28" 60's under the fenders temp stayed right around 180 and was a decent ride, hot though with no a/c , and also horrible gas mileage est. about 9 miles to the gallon.
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Old 08-06-2012, 05:00 PM
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ok, thanks. I am planning on leaving real early to avoid traffic because I can overheat with the car when sitting too long. I also have a bunch of fluids, tools, and radiator fluid.

Also, cruising at 3700 rpm for a long period of time doesn't adversely effect the piston rings?
Listening to the engine churning at 3700 RPM for 2 hours will be harder on you than it.

Bogie
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Old 08-06-2012, 05:18 PM
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I agree you do have to pull over every once and awhile and give your ears and brain a break but your crusin a Hot Rod and that is what counts
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Old 08-09-2012, 09:28 AM
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I made it here no problem. I was able to go slow and stay under 2000 rpm. I had some stalling problems sitting at stop lights; the car would stop fine and after a while of sitting on the brake, it begin to surge and then stall. I lowered the front float and it helped.

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Old 08-09-2012, 11:55 AM
How fast is fast enough?
 
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Fwiw my 280 cruises at like 3100, and has 160,000 miles on it that way and the engine shows little wear. I know its a little different than an sbc but it hums along just fine. Thankfully the t5 I have for my 302 swap has a .63 overdrive though, the drone does get a little old.
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Old 08-09-2012, 04:27 PM
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also horrible gas mileage est. about 9 miles to the gallon.
i got about 18 mpg
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Old 08-10-2012, 08:41 AM
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50YRS ago in the heyday if hotrodding, no one thought twice about cruising with 4.56 OR 4.88s and a smallblock. Will your motor make it 150k miles? Probably not; but it'll probably make 60k. Change your fluids regularly, check your plugs, use quality products and carry some water with you.

Glad you had a good trip; thats what its all about
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Old 08-10-2012, 08:50 AM
How fast is fast enough?
 
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50YRS ago in the heyday if hotrodding, no one thought twice about cruising with 4.56 OR 4.88s and a smallblock. Will your motor make it 150k miles? Probably not; but it'll probably make 60k. Change your fluids regularly, check your plugs, use quality products and carry some water with you.

Glad you had a good trip; thats what its all about
I wouldn't say 50 years ago was in any way better than today for a hotrodder. Better products, better variety, better techniques, much better technology... you're getting 50's power levels from econo 4 bangers...

As for longevity there are a LOT of trucks out there with 4.10s and over 200,000 miles. All the advances make that possible.
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