I have a 350 from a 1976 camaro in my 82 so it has low compression from factory. I dropped a 142 roots blower on it a couple of years back with a 700 carb.

The heads and cam are now limiting me.
I was looking for budget options on heads. say under $1000

I was looking at vortec heads but don't want to have to buy the adapter for the blower.

second question: will my bottom end survive if I add new heads?
the engine has less than 70k miles on it.

 

What heads do you have now?

Vortec will probably give you 10:1 compression blown that might be a bad idea

I would look into aftermarket heads with larger chambers.

 

Considering that it's only a 142 S/C, the block, whether 2-bolt or 4-bolt, should be able to withstand the additional boost pressure... provided that detonation is kept in check.

 

I don't want vortec heads because of

http://www.jegs.com/i/Weiand/925/6112P/10002/-1

What budget heads exist that would work well with a blower on 93 octane?
should I use? (stock or aftermarket?)
what size heads? cc?
thanks for any suggestions

 

I'm only using the pulley that came with the 142 so not too much boost yet too

 

You can pick up a set of 2.02 world products S/R heads for about 700 assembled they are about the same as the old double hump heads flow decent and will fit a standard small block manifold.

They also come in 67 or 76 chamber so you can keel low compression no problem.

 

i would save some more money and do a nice set of heads.

 

I would too but that was not his question

 

Edelbrock and Dart both make aluminum heads within this price range. Iron's got some advantages such as better heat retention as well as "ultimate budget" heads. The difference is so small any more it almost doesn't make sense to do iron with the weight benefits and high flow. Assuming you have 882s some porting would take you a bit further but I'd spring for the heads. Look up flow #s and preferably use the ones with the best exhaust possible even if you sacrifice a bit on the intake sides IMO. Besides that if you're running the stock cam I'd probably junk that as well.

 

There are so many heads available.
How do you know which to use? (is there any good rules to follow for head selection?)
combustion chamber volume?
intake volume?
exhaust volume?

http://www.summitracing.com/search/M.../?Ns=Price|Asc

 

I would take a look at the Brodix IK180 aluminum head....my dad has the on a 383 sbc with a Comp Cam NX276HR hydraulic roller and a Magnuson MP122 supercharger and it runs exceptionally well for a daily driven street vehicle. He stayed with the 180 instead of the 200 port size to have max port velocity for a street motor,gives better throttle response and low end...it will tend to come up on boost faster. For a street motor you don't need a big port for max high rpm hp.....torque is way more important. When choosing a head for a street motor....make sure you look at low and mid lift flow numbers....not just peak flow numbers.... and a head with a smaller port size that flows really well in the low and mid lift range will be more responsive than a larger port head that doesn't flow as much or even the same. The Brodix IK180 head flows really well in the low and mid lift range for a 180cc port. They would be just a smidgen over your $1000 budget.....but will be well worth it.....even if you have to save just a bit longer.....you'll be happier in the end. Hope this helps...

Brian

 

World Product Heads! (Cheaper)
Or AFR (Expensive - but the best)

2.02 - 1.60

 

I rarely get involved with comparisons and/or arguing on this board anymore, but take it from someone who has been there and done that. The 142 supercharger isn't that big of a supercharger to begin with, and if you run cylinder heads that offer excellent flow then don't expect your boost pressure to be too high. The reason why many members complain about lack of boost pressure with the 142 superchargers is because their engine already flows very well, and there is essentially no resistance, which is all that boost pressure is, a resistance reading. I wouldn't go any larger than 1.94 on the intake size, not to mention don't go too crazy with cubic centimeters (cc). We select our power adder based on our specifications, and putting a 142 supercharger on a 350 that can essentially outflow the supercharger is redundant. If you continue on with this build, and find your not making boost with the heads you selected, then it's time for a larger supercharger...

 

World products makes a SR head with 1.94 valves.

 

Procharged GTA>>
Is this the set your dad runs?
http://www.summitracing.com/parts/BRO-1021004/

what will 64 cc do to the compression ratio?
will it still run 92?

Street Lethal>> what heads did you run with 142?

midias>> do you have a part number can't find SR head with 1.94 valves on summits site?

Thanks

 

043610 67cc

043600 76cc

They want a lot for them not cool about 540 each

for that price I would not buy them

my neighbor just got some off ebay last winter brand new 680 shipped world products with 1.94 and 67cc chambers they work great and make really good power. I am impressed I thought with 1.94 they would not be as good.

Here are some on ebay for 700 ish

http://www.ebay.com/itm/Pair-PBM-SBC...item519c5eaa41

http://www.ebay.com/itm/World-Produc...item2c5f977cc7



64cc heads would probably give you around 10:1 with stock pistons that might be a bit risky with a s/c

 

I came across a set of brodix h495 heads with port work and double springs for 500 with crane gold 1.6 rockers. As cast they were 195 intake runners but 67cc chambers. Not sure your compression would be in the right zone. Issue being they were cast in 1981, yes 1981. Point being find what compression you need to be at with the boost you want to run then go out searching. There are tons of inexpensive options out there.

 

Ported 882's; 1.94/1.50 w/76-cc...

 

Did you ever pull your valve cover to see what heads you have?

 

I had a friend run some numbers and he suggested this one.

http://www.summitracing.com/parts/EDL-607119/

or

http://www.summitracing.com/parts/EDL-60719/

anyone got one better bang for buck?

 

Edelbrock 60719
vs
Brodix Cylinder Heads 1021004

any thoughts?