opinions?..il be running these on a 84 L69 trans am...it has headers and full 3in exhaust...dual snorkel and hood intake...new cam (havent decided what yet )
thanks

How much are these, and what would they do for an 86 TPI TA with the mods i have in my sig?

I have the World Torquer S/R cylinder heads on my 305 TBI and I can show you (math, dyno, seat of the pants, stuff I broke after I installed them,you pick one) that the World's are a big gain.

They use the biggest valves (1.94) that they can fit in a 305, so yes there is shrouding, But is it to the point that it will hinder or not produce anymore power? Ab-so-freakin-lutely Not! A cam with more lift and/or duration will also help out tremendously with valve shrouding issues. They are also supposed to raise your compression by one half of a point. World's also have the pre 87 bolt angles. Having headers on World cylinder heads is a must though. They will flow more air so they will raise your engine compartment temps and your exhaust manifolds will be choking them.
Many people will compare them to the aluminum vette heads with the 1.84 valves but it is my opinion the ALUMINUM PORTED Vette heads would be as good as the stock UN-ported IRON World Heads. But with a good cam and port job the World's would be better.
Another thing people will compare them to are the Vortecs. The valves are the same size, the Vortecs will flow more, but not add to your compression. But if you buy vortecs you then have to change the intake and a few other things. So if you sonsider spending 600-800 on the Worlds or close to 1000 for a Vortec swap I think that the choice is obvious.
I think the World's have been the best purchase performance wise.
Now I am sure others will come in and argue me, which is cool, but please only do so if you have first hand experience-not just reading articles. I have installed and run Vortecs on other cars and World's on mine.

Thanks for the input. Its either going to be those, or I'll end up redo-ing a set of 305 TPI heads myself, thats why i asked. Hooker 2055's are also going to be put on. Quick question....would the ZZ4 cam require me to do a custom PROM or is it computer friendly?

It might be. It will help that your TPI system is MAF. Just don't take the seperation angle below 110-112 and duration above 230-240. The newer F-bodys used more aggresssive cams but they had used the OBD-1 computers. Remember though that if you are dtermined to getting it running as good as possible than Prom changes are a good idea. Do some research and have fun!

Over in the engine swap forum, there's a guy with a set of those torquer heads, a cam, headers, and dual exhaust. 306 HP and 366 TQ (engine numbers). 305 with torquer heads thread. Click here.

i am going to get them from a friend who has a 10 second monte carlo. there already port and polished. he has to figure out a price for yet.

what did you break after you installed them?

Does anyone have any stock flow numbers for these heads? I've heard anything from 200-215@.500 lift on intake and 130-160 on exhaust.

I read an article in chevy high perfromance that had those heads on a stock 85 TPI motor with a MILD crane cam probably one of the power max's and it pulled 265 horsepower with headers, stone stock compression and stock fuel and spark maps. With tuning I think that you could get more out of it.

First off all the higher exhaust temperatures and exhaust flow helped to speed up the demise of my catalytic converter. Then they broke my T-5 transmission. Then it chiped a tooth on my drive shaft and gear. Then they ate my transmission mount and rear drivers side lower control arm. I can not say they were the only cause of all of this, but it is a nice big coincidence. The only previous owner was an older lady and the car only had 70,000 miles on it when I put them on.

i already demolished the inside of my cat..but its the trans and control arms im worried about.....were you just driving around or were you launching it at the track...

Look in my Sig... HUGE difference from what I had stock 305 TBI. I port and polished my S/R Torquers too... The Valve shrouding is nowhere near what they are with the stock heads (with 195 valves). I'll see if I can find a pick of the comparison of the two.
I picked up the complete heads new for $600.

I would highly recommend getting a new chip for the car. Not some hyper chip, but one made properly were feed back is taken from your car and tested medified, tested.... you get the Idea. Making your own chips is not that hard it took me about 3 mo. to really get a handle on how to do it by reading on the DYI-PROM board. Now the basics are a piece of cake(enough to get the car to work well), the higher level stuff (getting every minute subility) out of the tuning is what I am working on next.

My dad has a stock 86 vette and my car kicks it butt, even though it is only a 305.

It was a combination of both actually. All that happened in a two month period. I also melted 4 of my accell 8.8mm high temperature plugs wires, and no they did not touch the header. I made sure they wouldn't earlier.
The numbers are:
Chambers 58cc
intake runners 171 cc
max lift .560
No guid plates permitted.

im carbed

um i think all that damage was not just cause of those heads... i have em and a cam and everything else, and my rear isnt falling apart and my tranny shifts smooth as butter, you cant take a car driven by an old lady and modify it and then beat the snot out of it, cause everything will break.

You might also consider the Protopline 23 degree 180cc heads with the 1.94" intakes also. At about $830 from Summit, they appear to be in the same ballpark pricewise.

Thanks for the heads up....I'll look into that as well.

doh!!

I don't understand what you are saying. You start by saying that the head swap could not have done that. Then you end up saying that if I added those heads(modified) I would break stuff. Did you change your mind or are you contradicting yourself. If the heads didn't do it what do you think did? Did you change your transmission? Maybe you don't drive your car hard enough to break stuff, but I power shift, down shift, floor it and have fun. So MAYBE the heads didn't do it. I know stuff will eventually break (the T-5 is weak, our cars were not set-up for a ton of abuse) But really, come on, that is a BIG coincidence.

More power and abuse and you wonder why you break stuff? You've got to be joking! Slam shifting is fun, but you'll break stuff driving that way, no matter which heads are on your car.

I have a Science professor at college with a 1986 covette MAF TPI. He dropped the ZZ4 into it and topped it of with the old MAF TPI unit. He added an AFPR and a 46 lb per hour fuel pump. He said he called all kinds of places and no one could give him a sure anwer if it would idle or drive good or not. So he put it in and tried it. He said it fired right up and is an awesome cam, it idles better than stock. The AFPR set at 45 and he gets 2 miles per gallon better now than when it was stock.

bnoon,
I am not wondering why I am breaking stuff. If I can do a head swap, rebuild a transmission and weld my own exhaust than I am competant enough to know that the Heads greatly helped out in that department. 86Z was the one who was saying that the heads didn't do it, than saying they would. I was just replying to what he was saying earlier.
Now would every body be nice to me, I have tests to study for.

Well, that deifnetly answers my question. Thanks for the heads up. I will look into this as an option.