H-beam vs I-beam.

[V-8]

Hi guys;
What are differences between 4340 forged steel H-beam and I-beam rods?

[V-8]

And ,i notice that some aftermarket forged cranks comes with Small Block Chevy Rod Journal Diameter (2.100").Why not 2.310 diameter? Is it good or?

[scottj]

I-Beam or H-Beam doesn't really matter. What does matter is the quality. Most of the cheap H-Beam rods are Chinese forgings from less than top quality steel. They are usually machined in the USA but to lower standards than premium rods. The cheap Chinese cranks are the same way.
While they usually are more than adaquate for street or moderate HP race applications, in a high HP endurance application the Chinese steel is prone to cracking.

The 2.100 rod journal makes for a lighter crankshaft and rod assembly. Winston Cup engines, both Fords and Chevys, commonly use 2.000 and the 1.888 Honda size journals. In addition to weight savings, smaller journals have lower bearing speeds.
Scott

[Dwight]

KMP

[PSB]

Given the same quality, an H-beam rod is stronger than an I-beam rod.

As Scott said, smaller bearing journals allow for lower bearing speeds, which allows you to spin the motor faster. If you're planning to spin your motor to 8500 rpm, then get the crank with the smaller journals. If you're going to keep it uner 6500, then stock size is fine.


Pete

[brainsboy]

V8 I noticed alot of your questions here on the site, you might want to pick up a performace book, that answers alot of the questions you have, and gives you a basic understanding into performace parts. A good starter book is FORD PERFORMANCE by SA DESIGN.

[Rick Parker]

http://www.grapeaperacing.com/GrapeA...h/rodtypes.cfm


Good Info

Rick

[V-8]

Originally posted by brainsboy


V8 I noticed alot of your questions here on the site, you might want to pick up a performace book, that answers alot of the questions you have, and gives you a basic understanding into performace parts. A good starter book is FORD PERFORMANCE by SA DESIGN.

Already i have got a lot of FORD PERFORMANCE books I just want to talk each other with Ford funs and learn their suggestions

[brainsboy]

I saw your mustang at your site, thats pretty cool to have that car in a foreign country.

Do you see many american cars in turkey? I would amagine parts are hard to find.

[V-8]

Thanks guy;
Some of them are:
http://www.otospor.com/cowboys.htm
http://vipspeed.com/memories.htm
http://otodrag.com/foto/race/racing....1%3A33%3A53+AM
http://vipspeed.com/cars.htm
http://vipspeed.com/restorasyon.htm
http://www.vipracingturkiye.com/
Alot of GM cars in Turkey.Popular illegal cars are:Toyota Supra HKS,BMW M3 turbo,C5 Corvettes Lingenfelter kit,LS1 Camaros with nos kit, 74 Camaro with 540 BBC fourlink and 10 point cage.
Yes, I buy parts %50 more price and i can't find all parts at once i must wait UPS OR DHL delivery service
But hand made things are very cheap in Turkey.My body worker made my eleanor body kit only 1250$ and 750$ for chassis work ,painting work 700$.