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Re: 318-390 stroker which head to use
[Re: Brian Hafliger]
#1745415
02/03/15 04:14 AM
02/03/15 04:14 AM
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Joined: Sep 2004
Posts: 6,906
IL, Aurora
ademon
master
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master
Joined: Sep 2004
Posts: 6,906
IL, Aurora
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Quote:
Quote:
built a 318-390 stroker and have a choice of eddy heads 202 160 valves and a set of indy x iron heads 192 162 valves. this is street strip engine.mostly strip thanks Bradley
Check these out: http://immengines.com/indyimmironheads.html
 that's what I was thinking. Have you done a sb stroker 6 pack with these heads ?
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Re: 318-390 stroker which head to use
[Re: roadrunnerreds]
#1745416
02/03/15 12:04 PM
02/03/15 12:04 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
built a 318-390 stroker and have a choice of eddy heads 202 160 valves and a set of indy x iron heads 192 162 valves. this is street strip engine.mostly strip thanks Bradley
Do you have these heads now or are you buying.. if
you have them... then the eddy set with 2.02
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Re: 318-390 stroker which head to use
[Re: DusterDave]
#1745421
02/04/15 01:58 AM
02/04/15 01:58 AM
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Joined: Jan 2003
Posts: 5,486
SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,486
SoCal
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So 40 extra pounds makes such a huge difference eh? Tell us Duster Dave, how much of a difference? Or should I already know that too?? My duster has always had a cast iron headed small block and yet it leaves hard with better than avg. 60ft.s. 40lbs. off the front end, all things being equal would not equate to very much if anything. But the 20-30 extra HP our Iron heads make over OOTB eddys would definitely amount to a very noticeable difference. But I'm sure you already knew that! Gotta love the internet smart a$$e$ 
Brian Hafliger
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Re: 318-390 stroker which head to use
[Re: roadrunnerreds]
#1745426
02/04/15 02:11 PM
02/04/15 02:11 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Thanks for the replies guys. Mr p body i already have both sets of heads. I got the indy heads thinking because the small bore( under 4 inch bore). What is the benefit of the beehive springs?
Being you already have the eddie's you would save the
40# on the front and you can also raise the compression
a bit and not fear detonation.. all pluses in my book
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Re: 318-390 stroker which head to use
[Re: cudadoug]
#1745429
02/04/15 03:08 PM
02/04/15 03:08 PM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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I went 10.75@123 with IMM (Brian) ported eddies on my pump gas 390" engine with a solid cam. 3450#
Last edited by Triple Threat; 02/04/15 03:09 PM.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: 318-390 stroker which head to use
[Re: cudadoug]
#1745430
02/04/15 03:14 PM
02/04/15 03:14 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Let's explore this, based on a comment from above...
A given motor has 9.5:1 with iron heads and we add aluminum heads and get to 10.5:1. Are there REALLY any gains from the CR increase, being that aluminum dissipates heat so fast??
In reality they pretty much became equal on the compression
aspect but the alum head is better on the detonation
and you still have the weight savings
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Re: 318-390 stroker which head to use
[Re: MR_P_BODY]
#1745431
02/04/15 07:17 PM
02/04/15 07:17 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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Iron VS aluminum is no significant power difference if both heads are the same otherwise. Aluminum ALLOWS more compression it does not NEED more compression. That myth has been disproved many times.
Unless traction is a big problem for you then I would sell the eddys and use the money to have Brian port the iron heads and still have money in my pocket.
I am building a motor for my own Dakota R/T with iron heads and will just do everything I can to make it hook, if I have to down the road I will step up to aluminum but only after I exhaust all other reaonable posibilities, then it will probably be in the form of a new style hemi and selling my current 392 stroker. I have 10.2 compression, tight quench, magnum heads and a small cam (stock 5.9) and no detonation.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 318-390 stroker which head to use
[Re: HotRodDave]
#1745432
02/06/15 09:46 PM
02/06/15 09:46 PM
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Joined: Jan 2003
Posts: 3,943
Melbourne.....Oz-land
Moparmal
master
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master
Joined: Jan 2003
Posts: 3,943
Melbourne.....Oz-land
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Its interesting you say that HRD - in our climate we'd go with the alloy head every time....less risk of detonation at 10:1 static with a mild cam....and less cooling issues - but our gas is also pretty cr@p so the heat dissipation of alloy helps there as well. My point is only this - we should never underplay the effects of thermal dynamics when choosing performance parts.... 
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