318-390 stroker which head to use

318-390 stroker which head to use - 02/03/15 06:22 AM

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

Posted By: Brian Hafliger

Re: 318-390 stroker which head to use - 02/03/15 07:48 AM

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

Posted By: ademon

Re: 318-390 stroker which head to use - 02/03/15 08:14 AM

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 ?

Posted By: MR_P_BODY

Re: 318-390 stroker which head to use - 02/03/15 04:04 PM

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

Posted By: jg309

Re: 318-390 stroker which head to use - 02/03/15 05:20 PM

i've got a new set of eq bare i'd let u have, pm me if interested,john

Posted By: DusterDave

Re: 318-390 stroker which head to use - 02/03/15 10:38 PM

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

I'd go with the Eddy's. The weight savings is a bonus.

Posted By: Brian Hafliger

Re: 318-390 stroker which head to use - 02/04/15 02:18 AM

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

I'd go with the Eddy's. The weight savings is a bonus.

What does the weight bonus actually provide??

Posted By: DusterDave

Re: 318-390 stroker which head to use - 02/04/15 03:38 AM

Quote:

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

I'd go with the Eddy's. The weight savings is a bonus.

What does the weight bonus actually provide??

It's got something to do with power to weight ratio, and front/rear weight bias. You should already know that.

Posted By: Brian Hafliger

Re: 318-390 stroker which head to use - 02/04/15 05:58 AM

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$

Posted By: pittsburghracer

Re: 318-390 stroker which head to use - 02/04/15 06:08 AM

Gotta love self promoters too.

Posted By: Brian Hafliger

Re: 318-390 stroker which head to use - 02/04/15 07:10 AM

Quote:

Gotta love self promoters too.

Your one to talk....

Posted By: roadrunnerreds

Re: 318-390 stroker which head to use - 02/04/15 12:40 PM

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?

Posted By: dogdays

Re: 318-390 stroker which head to use - 02/04/15 06:02 PM

If you already have both sets of heads, send the Edelbrocks to Brian (OU812) and have him port them. Best of both worlds. Or the iron heads, which seem to be a favorite of his.

Point is, this guy is a professional who knows his way around a smallblock head.

Beehive springs allow one to use a smaller retainer which takes mass out of the valvetrain, also the shape of the springs makes them less susceptible to harmonic vibration and one can usually use a beehive with a lower seat and/or open load.
Comp Cams really put the idea on the map.

R.

Posted By: MR_P_BODY

Re: 318-390 stroker which head to use - 02/04/15 06:11 PM

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

Posted By: DusterDave

Re: 318-390 stroker which head to use - 02/04/15 06:22 PM

Quote:

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

Careful, Mr. P. Your comments might anger ou812! He's trying to make a sale here!

Posted By: cudadoug

Re: 318-390 stroker which head to use - 02/04/15 07:04 PM

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??

Posted By: Triple Threat

Re: 318-390 stroker which head to use - 02/04/15 07:08 PM

I went 10.75@123 with IMM (Brian) ported eddies on my pump gas 390" engine with a solid cam. 3450#

Posted By: MR_P_BODY

Re: 318-390 stroker which head to use - 02/04/15 07:14 PM

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

Posted By: HotRodDave

Re: 318-390 stroker which head to use - 02/04/15 11:17 PM

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.

Posted By: Moparmal

Re: 318-390 stroker which head to use - 02/07/15 01:46 AM

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....

Posted By: MR_P_BODY

Re: 318-390 stroker which head to use - 02/07/15 02:32 AM

Unlike Dave... if I have the choice between the iron
and alum... I'll take the alum every time... I have
a set of W-2s on my Rampage right now because I was
getting my W-5s fixed.. cant wait till get them back on

Posted By: HotRodDave

Re: 318-390 stroker which head to use - 02/07/15 04:03 AM

Trade you a pair of nice 5.7 aluminum hemi heads for your w2s when your done with em

Just for the record if two identicle heads but aluminum and iron presented themself to me for the same low price I would go aluminum, I just don't think iron heads have cooties. Quality iron heads can be had for cheap, not aluminum. The thing is you can get W2s for less than eddelbrocks, about a wash when you count rockers but you can still make a lot more power with the W2.

Posted By: MR_P_BODY

Re: 318-390 stroker which head to use - 02/07/15 05:18 AM

Quote:

Trade you a pair of nice 5.7 aluminum hemi heads for your w2s when your done with em

Just for the record if two identicle heads but aluminum and iron presented themself to me for the same low price I would go aluminum, I just don't think iron heads have cooties. Quality iron heads can be had for cheap, not aluminum. The thing is you can get W2s for less than eddelbrocks, about a wash when you count rockers but you can still make a lot more power with the W2.

I wont sell any of the heads I have now.. after they
come off my 416 they'll go back on my 396 that was
the backup for the race car.. but now that I sold
my 405 W-9 engine that 396 will go into the car