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Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 01-02-2010   #1 (permalink)
danielf is offline PONY Member


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Default 289 V8 Rotating Assembly Questions

Does anyone make just a 289 rotating assembly? When i google that all i get are 289/302 based stroker kits. Noone out there sells light weight or forged 289 kits? If less weight makes the motor run smoother and frees up power isnt thier just 289 only kits?

What is the difference between h beam and i beam rods? Is one better then the other?

Why cant you put a roller cam in a 289 just like you can with a solid or hydraulic?

What does having it balanced do?

What is a fluid damper and why are they differnent sizes or weights? 28oz or 34oz or 6 1/4" or 6 5/8"?

What is the differance in pistons? One is coated with something, another is hypertension or something like that?

Sorry for all the questions but i just dont understand the internals very well.
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1966 Mustang 2+2, 289 c code/c4, Edel 600cfm/performer carb, intake/spacer,Comp XE250H Cam, pertronix igintor w/ coil, tri-y headers, dual factory 2"exhaust w/ H-pipe, flex fan, UDP's, windage tray, Grab-a-track Suspension, B&M shift kit, 2.80 w/track lock diff.

2004 Toyota Tacoma TRD Prerunner
2006 Nissan Sentra (wifes' car)
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Unread 01-02-2010   #2 (permalink)
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Default

Quote:
Originally Posted by danielf View Post
Does anyone make just a 289 rotating assembly? When i google that all i get are 289/302 based stroker kits. Noone out there sells light weight or forged 289 kits? If less weight makes the motor run smoother and frees up power isnt thier just 289 only kits?

What is the difference between h beam and i beam rods? Is one better then the other?

Why cant you put a roller cam in a 289 just like you can with a solid or hydraulic?

What does having it balanced do?

What is a fluid damper and why are they differnent sizes or weights? 28oz or 34oz or 6 1/4" or 6 5/8"?

What is the differance in pistons? One is coated with something, another is hypertension or something like that?

Sorry for all the questions but i just dont understand the internals very well.
"H" beam and "I" beam rods are stiffer in different directions and under different load conditions. The best one depends on its use.

You can install a roller cam in a 289. You will have to use aftermarket cam, lifters, push-rods, and springs. You should probably get a kit with all the parts matched.

Having the engine statically and dynamically precision balanced takes out all the manufacturing tolerances and frees up the hp that is normally wasted spinning the unbalanced parts. It also reduces the loads on bearings making it spin up easier and run smoother.

Fluid dampeners are matched to the imbalance of the engine. Basically the engine has an imbalance that is made up by the flywhel and dampener. Engines made in different years use different sizes and weights so you have to select the balancer to match your engine. They use fluid to take out the hamonic pulses that are usually canceled by a rubber bushing that is bonded between the inner and outer rings of the stock balancer. Since the fluid dampener are one piece they can't separate like the factory ones do sometimes.

Pistons vary a lot in construction and coatings. The coatings either protect from heat (tops) or make the sides slippery. The "Hyper" pistons are very good cast pistons that change shape with heat and pressure to make the seal better without adding load to the engine. The forged pistons can be stronger and lighter for high pressure or RPM use. Up to about 5000 - 6000 rpm you can use the cast or hyper pistons but over that speed you need forged pistons to take the loads.

I know the information is not complete and might not be completely accurate but I hope it helps.
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Unread 01-02-2010   #3 (permalink)
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Default

WOw Paul it sure does. But does anyone make a forged rotating kit? Or all aluminum kit or something? Is it even worth it on a street driven "weekend worrior"? Im doing everything i can to make this thing a sleeper so i was just wondering if doing that type of internal stuff is worth the hp after all the cost? I assume it would last alot longer with it being that smoothed out.
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1966 Mustang 2+2, 289 c code/c4, Edel 600cfm/performer carb, intake/spacer,Comp XE250H Cam, pertronix igintor w/ coil, tri-y headers, dual factory 2"exhaust w/ H-pipe, flex fan, UDP's, windage tray, Grab-a-track Suspension, B&M shift kit, 2.80 w/track lock diff.

2004 Toyota Tacoma TRD Prerunner
2006 Nissan Sentra (wifes' car)
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