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Author Topic:   Best latemodel cast iron head
nw15
Member
posted October 01, 2001 05:06 PM
Hi

I'm building a 355cui/750 holley chevy engine. The rules say i must use cast iron heads GM or Dart. porting is allowed. What would be the best head for this combo. Any suggestions.

sdhnc29
Member
posted October 02, 2001 09:57 PM
Dart Iron Eagles , hands down !!!


istock59
Member
posted October 03, 2001 12:44 PM
With that big of a carb, Iron Eagles, with big valves.

I'm limited to a holley 350 carb and I like the Vortecs so far...

sdhnc29
Member
posted October 03, 2001 11:59 PM
Yes , in your application the Vortec's would work well . But in a class with a big carb. and without a valve lift rule , the Iron Eagles will shine . I use the Vortec on any engine that is limited to an OEM production head . I use the Iron Eagle on all of my engines that are just limited to steel heads only . I've got several Iron Eagle engines running that use 500 Holley's , but none with 350's . What type of class do you run that requires a 350 Holley ?


istock59
Member
posted October 04, 2001 07:58 AM
sdhnc, It's the IMCA Stockcar class. IMCA, in their infinite wisdom stuck us with the Holley 350 last year. Before that it was an unlimited OEM 2 barrel.

We went with the Vortecs because of their small intake runner and high velocity flow. Felt like that'd be the best bet with the tiny carb...

Any ideas on making more power with that carb are welcome!

sdhnc29
Member
posted October 04, 2001 11:41 PM
The key to any 2 barrel engine is compression ratio ! Our 2 barrel engines are built at a minimum of 15.5:1 . Some of the engines that I've done have been higher , but this depends on the guy buying the engine , and his budget . The Vortec heads are great for your application , but I think the Darts would work better ! The low lift flow number's on an Iron Eagle are better than the Vortec , and this is important . If you would like to call me at my business , I'll be happy to explain things in more detail , and maybe help you out a little . If you can tell me more about your engine rules , I can tell you how to make more power !
Steve Hendren
828-286-0780 mon-fri 8:30-5:30 eastern time


istock59
Member
posted October 05, 2001 07:50 AM
Steve, one of the worst rules is that this is a $425 claimer motor. So I can't sink a ton of money in it. I'm also sponsored by a GM parts dealer, so I get vortecs at a good price.

Other rules. No cube limit. Cast iron intake, no high-rise or marines. No roller rockers. No roller cams. Gas only, no alky. No aluminum heads.

Thanks for any input.

sdhnc29
Member
posted October 08, 2001 10:20 PM
Ouch !!! That's a tuff dollar figure to work around ! Fax me a copy of your rules , and let me see where the gray areas are . I still think I can help !


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