I am a bit confused about the World 305 Torquer heads. I was wondering if I can get a set that will work on a two piece rear main seal 305 or 307 block, but at the same time still work with an 87 or later tpi unit? Can anybody tell me if these heads will work for that kind of setup? Thanks.

Hey CamaroRS. These heads will work fine on the set up you have. I have them on my 88' T/A and what a difference! They should've made these from the factory this way. And it shouldn't matter whether it's a one piece or 2 piece seal. The seal has nothing to do with the heads and yes the 87' TPI set up will work also. Good Luck. Rich

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88'TA 305TPI 330HP, NATURALLY ASPIRATED, PASSES N.J. EMMISIONS. "I AM JUST THAT GOOD"

The S/R 305's are machined for both style valve covers.The 1-peice or 2-peice seal doesn't matter.
Nitro Don

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1990 Trans Am WS6
305TPI 700R4

ENGINE:
150hp NOS kit
March underdrive pulleys
Edelbrock headers(JetHot)
Mac off-road pipe
Flowmaster exaust
Jacobs ultra coil
K&N filter
Fulley ported base,
runners,& plenum
Crane AFPR
Hypertech airfoil
Crane 1.6 rockers
210/220 .533/.544 Cam
W/P Torquer heads
Edelbrock TPI Base
Edelbrock TI Runners
Edelbrock 52mm T.B.
TRANSMISSION:
Richmond 3.73's
Auburn posi
B&M Mega shifter
B&M Transpak
Vette servo
B&M 2400 converter
TCI Trans Rebuild
Nitto Drag radials
FUTURE MODS:
The 700R4 is DEAD!!
Neeed to rebuild AGAIN!!
BEST RUN:
12.48 @ 109.23 MPH
(with stock heads,cam,intake,and crappy Pep Boy's tires)

So 1Badazta, would you say that these heads flow more than Vette Aluminum heads? Are they comparable to stock double hump heads? The reason I ask is that I bought some for my 305 and ran into some problems (not related to the heads, I blew something in the wiring harness). and never got to run the car with the engine running properly and since I bought a 2000 3.8 stang for mileage and I got an awesome deal (I know, I know) I have been able to pay more attention to my firebird. Do these heads flow enough to make 300-330HP on a 204-214 cammed, 9.6 to 1 compression 350? Thanks

What makes the difference between 85 and 86 heads vs the 87 and later is the angle the 4 middle intake bolts are drilled. 85 and 86 will fit on earlier heads, 87 and later won't.

So in 87 they switched to the centerbolt valve covers, self-aligning rocker arms and a 1piece rear seal?

I can't decide between the 305 S/Rs and the Vortec. I know with the Vortecs I will have to buy the intake and spend more $$. What is the current cost of the S/Rs assembled? Did they really make that big of a diff, like on your timeslip?

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85 IROC,5.0 TPI,T-Tops,fully loaded,black with red Lear-Siegler "Camaro" interior,Decal Delete,91 Bose stereo,Stage 2 Fastchip,AFPR,TB Airfoil,K&Ns,March pulleys,Alum. Driveshaft,92 police version 700r4

"The Devil drives a Camaro"

I dont think they made a diffence for me.I havent really had the car tuned right since the swap.My big problem is the flow numbers.
The exhaust is 139 CMF's 5000 RPM.If I had to do it all over again,I would have spent the extra money and got the Vette heads.I have too much cam and intake for these heads.
Nitro Don

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[This message has been edited by Nitro Don (edited February 06, 2001).]

Called W/P today.Another thing that sucks about these heads,unlike the other S/R heads,the 305 heads are "NOT" machined for 1.440 springs.These heads are a big pile of sh*t.W/P also claims 166CMF @ 5000 rpm.
So Im going to try a set of K-Motion valve springs that are go to .610 lift with 130#
seat pressure.
Nitro Don

[This message has been edited by Nitro Don (edited February 09, 2001).]

All correct except the rear main seal, which was switched in 86.

Not true. My '88 Firebird Formula 350 doesn't use self-aligning rockers.

With those heads a 1-piece or 2-piece main seal doesn't matter, but canted intake pattern of the center intake bolts of the TPI will.

Heh... missed that part.

The canted intake bolts in the center can be worked around fairly easily.

hey nitro
are you saying that your w.p 305 heads suck compared to vette castings?
hmm I thought they would flow better and have beter spring seats also.
if you really think there is another head out there with 1.94int valves for a 305, that is better than w/p let us know.

How ****ty are these Heads? I was going to use them on a 350 builup but am hesitating now that I read these things about them. Do they really flow that crappy? I may just sell them and get some TrickFlow 23Degree heads then. I guess I could get $200 for them considering they only have 1000 miles on them.

These heads really aren't that bad. Sure there are better heads out there, but for the money for a stock to mild combo it's a fair price. And if they flow so crappy why do I give our brotherns, the LS1, a run for their money and beat them? I only have a 305 N/A!!!

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88'TA 305TPI 330HP, NATURALLY ASPIRATED, PASSES N.J. EMMISIONS. "I AM JUST THAT GOOD"

How do thes heads repond to porting? I know they have more "meat" to work with than a production head. If I were to get these heads pocket ported, combustion chambers reworked to unshroud the valves and bigger 2.02-1.6 valves installed would they flow equal to box stock Vortecs? Or better? A;so, what exactly is the procedure for unshrouding the valves, I know it's something they have to do to make it work on a 305 correctly.

To unshroud the valve,you have to cut the cyl.wall at an angle.
Has anyone fully ported theses heads?What Kind of flow numbers did you get?
Im going to install some K-Motion valve springs that are good to .610 lift.
If these springs float,Im going to pull the heads,have the seats and guides machined for 1.440 springs,and get it fully ported.
I was thinking about calling AFR to talk about this,to see if it would be worth it,or just go with a custom head.

Nitro Don

If the springs are good till .610" lift why would it valve float? What springs would be good for the ZZ4 cam with 1.6RR? I think the lift comes to about .535" exhaust, less on intake. I would also be interested in some flow numbers on fully ported 305 Torquers with bigger valves and who ported them.