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Old 04-01-2011, 11:36 PM
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want a crank to be lightened...

I live in Whittier,Cal. 90601 zip,562 area code What are a few local places that can lighten a 4cyl crank for me?

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Old 04-02-2011, 01:01 AM
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Call Castillo's Crankshaft, they're right next to you in La Mirada, Rudy and Joe have been in business forever and do xlnt work. (714) 523-0321
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Old 04-02-2011, 01:28 PM
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If all i do is drive it at 65-70mph ,will it help in acceleration and better mpg's? I got a free engine and am curious to see what improvements will be over the stock one that i already run.I currently drive over 120 miles a day to work and back.I never use it for racing.What about the rods?
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Old 04-02-2011, 01:34 PM
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Quote:
Originally Posted by sc2dave
If all i do is drive it at 65-70mph ,will it help in acceleration and better mpg's? I got a free engine and am curious to see what improvements will be over the stock one that i already run.I currently drive over 120 miles a day to work and back.I never use it for racing.What about the rods?
Just shot in the dark here but I think the fuel savings by the reduced rotating mass may be somewhat offset by that same loss of rotating mass. It's going to have a lower inertia and any time you go up even a slight incline you're going to have less stored energy to carry you over the hill and you could use more gas in those situations It could also be more difficult when pulling away from a stop. You know, a similar effect to installing a lighter flywheel. Again, it's just a shot in the dark and I have no idea how much of an effect that will really have...
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Old 04-02-2011, 02:42 PM
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Lightening the crank for street performance and gas mileage??....you're looking in totally the wrong place. Extemely miniscule gains.

Just the cost of the machining will be higher than it will save in gas cost over 50,000 miles. Crank lightening is one of the most expensive operations you can have done to a crankshaft.

Lighten the whole car, not the crankshaft, if you want to see any measurable gains.
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Old 04-02-2011, 03:32 PM
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Quote:
Originally Posted by ericnova72
Lightening the crank for street performance and gas mileage??....you're looking in totally the wrong place. gains.
I never said street performance.I said i never race it.This is a 4cyl,not a 8 cyl.

Last edited by sc2dave; 04-02-2011 at 03:54 PM.
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Old 04-02-2011, 04:09 PM
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Eric said it best, lighten the car, not the crank.
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Old 04-02-2011, 04:27 PM
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I never said race either, and knew from the first post it was a 4 cylinder. You said acceleration and mileage,... acceleration= street performance.

Like I said, looking at lightening the crank and rods in hopes of mileage gains or any noticable gain in acceleration performance on the street ...you are looking in the wrong place. Lighten the load(the whole car) the engine has to move, not the small(relatively speaking)parts of the engine.

Lighter wheels and tires will make a bigger improvement than a light crank ever will.
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Old 04-02-2011, 10:40 PM
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I have 15" tires already.The truck is an 86 Toyota truck.Not much to lighten.Swapped out the 4spd to a 5spd,no difference AT ALL.
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Old 04-02-2011, 11:05 PM
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I had an 86 Isuzu Trooper and I swapped the stock coil with an MSD coil I had laying around. After the swap the engine idled about 400 rpm higher than before and I had to turn it back down. It also idled considerably smoother and could be lugged to almost a complete stop without jack rabbiting. I don't know if this was because it had a better coil or if the stock one was just worn out but you may give this a try. It's a cheap thing to try.
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Old 04-03-2011, 12:06 AM
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I have an MSD 6 and a blaster coil already and a header with a Holley/Weber carb.Iplan to replace it with a 7508-1 Holley that has the "economizer" venturies.They look like a cut up pizza.
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