Head Education.....

[Andreas]

ftn96: for torque any set of fresh 1.94&1.5 valve with reasonable sized runners will be fine. Fresh is the key word

. You want good flow either way, just not a whole lot of flow

. Look into the Vortecs, they are hard to beat when it comes down to price. I think they have 64 cc combustion chambers which will make your compression go up with about 1 point = 9.2:1 or so. Unfortunatley this will require high grade gas.
Or, just find a good set of old trusty 76cc ironheads. Maybe Rock Monkeys 462624 heads are just what you need?!?

/Andreas

406cui of pure sh*t

 

[ftn96]

In addition to this 383 setup, I will be installing bigger pistons to comp for the 40 over the block will be when it gets back from the shop. Will this have some effect on the compression and deciding on which heads to get?

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[k5king]

no it will not,,,the only thing that effects comp. ratio is if you get a domed piston or dished and if you have smaller chamber heads or they have been milled down... then your comp. ratio will go up or down... wider pistons I.E. 40 over,do not have any effect on comp. because they are just getting wider they are not getting bigger!! they draw more air in but that is only because there is more space to fill..

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[ftn96]

SO what I getting when I add 2+2 here is that and engine setup for torque odesn't really have all that much trickery involved with all the different high dollar components combined to give you the same rides as all the souped up race cars and the like?

Don't you buy no ugly truck!
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[shum1]

I was under the impression that the vortec motors could run on 87 octane even though their cr is around 9.4:1 am I off on this, I too am considering vortec heads for my 1990.

 

[k5king]

to build a high torque engine you need to have a high lift short duration cam with a fair amount of compression,so 9:1 will be pretty good and still run on low octane... you still however should have as big an intake runner as you can fit to inhale more air/fuel faster...and the heads should be ported and polished the right way!! rough on the intake side of the head and glass smooth on the exhaust side of the head....you can put just as much money into a torque motor as a big hp motor,,it just depends on how well you expect it to run and be capable of

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[ftn96]

Im just looking for something with a noticable diffence in gitty-up than a stock 350.

Don't you buy no ugly truck!
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[k5king]

then just get a set of trick flow or edelbrock heads...they're both pretty good...i think edelbrock will even spec a cam to your heads and what you want it for...i know that comp cams will!!
if you don't want the alum. heads then go to a local machine shop and see what they have for sale or can build,,most head jobs are fairly decently priced for just a stock rebuild..

ANYBODY LOSE THEIR JEEP????????

I JUST FOUND ONE UNDER MY BLAZER!!!!

 

[ftn96]

In that case I could use the ones I have and have a basic head job with new lifters and springs and rockers and guides and all that jazz. Should still come up to be a little less than buying new ones. But then that brings me back to, For only a hundred dollars more I could.........
You see where Im coming from. Don't it suck but you love it at the same time? Man Blazer building and maintenance ROCK!!!

Don't you buy no ugly truck!
http://"mccordhouse.freeservers.com"

 

[Andreas]

k5king: I disagree with ya on the runner size. On a torque motor where no high rpms will be done, you don´t want big 230cc intake runners, you want air "speed" (in lack of a better word). Maybe "velocity" is the right word

? Just like you dont want no big ol´ 900 cfm carb on a torque motor. Leave the big runner heads to the 8000rpm 1/4 mile boys.

Andreas

406cui of pure sh*t

 

[lukers]

This is fun to watch. Actually oversize does affect compression. Check this site. http://www.bgsoflex.com/auto.html
Swept volume includes the cylinder size. Plug the numbers in the caculator.
Also I had stated in the beginning of this thread that if given the casting numbers I could give stock info. Here it is: Years 1968 - 1979 3998993 1.94 1.50 intermediate heads with 75.5 cc. I may be new but I can still offer what little I have. I just put these heads on my set-up replacing 882 heads. The motor will run in the spring.
Luke