both world heads... S/R torkers 67cc chambers 171cc runners 2.02 1.60 valves or S/R 64cc chambers 171cc runners 1.94 1.50 valves. note:stock chambers r 64cc and stock runners i think r 155cc. will the higher flow of the torker outweigh the loss of compression? or should i retain the stock compression but go with the smaller valves? hmmmmmm headers and cam also planned. 208in 214ex. 430in 460 ex.also b emmisions legal and decent mileage.

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

Personally it's a old head design and you can get a much better head for a little more cash. I got a set and put them on my 84 then regretted it. I got the 76cc chambers with the big valves. I wish I had gotten the 64cc and smaller valves. The heads don't flow well enough to warrant the larger valves since shrouding hurts the larger valves. Get a better set of heads.

 

well.....if u chose the wrong head and killed your compression with 76 cc chambers. then how could u say u say that world heads are junk....hmmm or "old head design"?

 

World Product Heads ARE old designs. They have horrible Intake/exhaust ratios. The S/R torquers have a 64.8% intake to exhaust ratio. You should definitly save up your cash and go with a better head. If you want to stick with iron heads, go with some Dart Iron Eagles. They have about a 80% intake to exhaust ratio right out of the box and with hand porting can get up to about 83-84%. Another good head is the GMPP aluminum L98 head, it has a 83.14% ratio out of the box. Either of these heads would be a much better choice. The intake to exhaust ratio is important because that is what determines how effiecintly your engine can operate. It comes down to do you want your engine running 60% or 80%+ efficiency??? Not a hard choice. The Worlds are junk. They make a good engine block, but they need to work on their heads.

"An economic replacement style head that offers good value for the cost, but is outgunned in our test. Combustion chamber design and spark plug location are ANTIQUATED AND UNDESIREABLE in a max-effort street car. Mixture motion is very turbulent, no swirl detected" That is from the Sept. 200 issue of GMHTP speaking about the S/R torquer. My buddy is porting a set of Worlds right now for another friend of ours. Ill have him come on here and tell you what he thinks of the Worlds.

 

Just curious, what lift are the 1.25 springs on the 180cc Iron Eagles rated at ? I notice the 200cc Iron Eagles have the option of 1.437" dual springs, any idea on the lift here ?

 

The S/R torqers are just a Double Hump replacement! Old design! The Dart Iron Eagles are you best bet! Best "bang for the buck"! 2nd choice should be the World Product Sportsman II's! Both the Dart Iron Eagles and the Sportsman II's are pocket ported heads! The Dart Iron Eagles however have better flow numbers!

However, to be completely honest with you, it's not gonna matter what heads you use with a small cam like that... in all reality!!

 

and where is the best place to shop for a decent price for both the aluminum L98 or the darts...are they emmisions legal? thanks
ed

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

any one?

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

You *SHOULD* be able to get both of them through Summit or Jegs. Im not 100% sure if Either of those companies carries the GMPP L98 heads. I do know that they carry the Darts though cause I got mine though Summit. The best place to get the L98 heads would probably be GM Performance Parts. Do a web search for either head and you should be able to come up with a few sellers. Good luck man.

 

One more note, World Sportsman 2's suck also. 63.84 percent. Bad exhaust port design. Once again, dont waste your cash with World.

 

are the darts emmisions legal? (have egr passages)? any bolt on issues with the darts?? they seem like a good choice for the $$$. thanx ed

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

Don't give up on SR Torquers so fast. Check out the www.worldcastings.com website and look at the SR Torquer tech sheet. The flow numbers are as follows:
@ 0.400" lift I= 205 CFM, E= 156 CFM
that's 77%

@ 0.500" lift I= 221 CFM, E= 166 CFM
that's 75%
They are still a good value.



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'85 Sport Coupe V6 T5(bought new)Put in 88 350 TPI/700R4 and a bunch of 88 IROC and aftermarket performance parts.

 

One more thing. Lingenfelter seems to think the SR Torquer is a good aftermarket iron head as well. He claims 400 ft.lbs. of torque and they are emissions legal bolt-ons. Be careful not to get a 200cc set of heads and kill your intake velocity down low.

 

glenn.......which of the two S/R's do u recomend? (see up top)...for my set up?

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

I think that you should choose the 64cc 1.94 intake heads. You will retain your compression ratio and what you give up in valve diameter you'll gain in flow velocity and therefore torque. I really like my "torquer" heads. I did get the 2.02 set but I built my engine from scratch and got pistons to go with the 76cc combustion chambers to net a 9.1:1 ratio. Everything I read said to stay around 9:1 CR. I paid $749 from PAW in California. No tax, free shipping. I went for a mild build up with a comp cam .450/.480 206/210 duration roller. The car has an excellent idle and really pulls hard due to the torque cam. It dies around 5000 RPM though but so does the intake. It's a sweet setup IMO

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'85 Sport Coupe V6 T5(bought new)Put in 88 350 TPI/700R4 and a bunch of 88 IROC and aftermarket performance parts.

 

thanks...i can get the 1.94 heads for about 550$ out the door....should i have the heads machined to allow for the 1.6 roller rockers? have u ever run yours in the 1/4 mile to see what improvements the heads accomplished? how many ponies u think these mods r worth my cam is identical as yours.

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

I haven't run mine through the quarter yet. I'm still breaking my engine in. I haven't had my engine dyno'd either but I was hoping for about 300 flywheel HP. Yes, you should get it machined for 1.6 rockers or get that 'louis' tool and do it yourself. I think the JEGS catalog has the tool for about $32? You can just set the drill bit guide in the pushrod slot and run a drill bit down into the guide and your done with that slot. I think COMP cams has a Louis tool for sale too. There is no way for me to know what difference the SR Torquers made. I built this engine up from scratch and then pulled the V-6 out. I had the engine balanced, decked, and blue printed, the transmission built for high performance (trans-go shift kit, corvette servo, etc.)Port matched everything. Hey, when you install your SR Torquers you should blend in the manifold ports to the larger ports on the heads. Make sure you get the correct heads for your year GTA (87 and later bolt angles on the two center holes).

 

hmmm do the 1.94 1.50 valve torkers come in a 87 and newer intake face? if not i will drill out the center intake bolts...also what type of goop do u recomend for sealing the intake? i got a mad leak from the intake, and center intake bolts.and the previous owner installed the gasket 14months ago! thanx ed

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

Use a fel-pro intake gasket, but throw the end seals away and use black RTV.

For the bolts, I use permatex non-hardening pipe sealent.

Make sure to go back over your intake bolts after a couple heat/cool cycles. They become very loose and need to be tightened a couple times before the seal breaks and coolant gets inside/outside.

 

by the way.... in superchevy april 99 they did a stroked305 to 335 with a 400 crank and with a comp cams 212in 218ex .444in and .444ex cam 114 lobe sep. S/R torker 305 heads 170cc runners 1.94in 1.50 ex valves.. 1.6 magnum rockers, msd ignition afpr.on the engine dyno the motor made 301hp and 381ft lbs. of tork with tpi. all i want is the same from my 350 with 170cc runners and the 2.02 1.70 valves is it a fair comparison?

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

Joel is right on the money. I used the same materials and methods that he did and so far have had no problems whatsoever. I used the felpro intake gasket kit and marked my intake manifold ports using the outline of the gasket for a template. The gasket fit the size of the SR Torquer ports perfectly so I could get away with doing this. I used a die grinder and sanding drums to blend in the intake ports to the heads so there wasn't a step between the two.

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'85 Sport Coupe V6 T5(bought new)Put in 88 350 TPI/700R4 and a bunch of 88 IROC and aftermarket performance parts.

 

One more thing. Don't forget to put Silicone sealer around the coolant ports on the heads for a little extra leak proofing.

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'85 Sport Coupe V6 T5(bought new)Put in 88 350 TPI/700R4 and a bunch of 88 IROC and aftermarket performance parts.

 

Glen, have you looked at your heads??? The reason i ask is cause my buddy is proting a set of S/R's for some guy and he says they have a terrible design. Plus the valve guides hang way too low. you have to port the crap otu of them to get a decent flow. Trust me guys. I have seen a set of Iron eagles next to a set of S/R's. The darts are superior in every way. Im sure the S/Rs dont look bad by themselves, but when u do a side by side compro, you can clearly see the differences. If your gona do your engine, do it right i say. dont mess with anything but the best. It might cost more, but how much is it gona cost if u decide to upgrade to a better head later on??? With mild porting, the darts will blow away a hoged out S/R.

one more thing. You got those numbers from the World website. I got mine form an unbiased magazine. who do u think is being more truthful??? Im not saying world would try and make their heads look better then they are, but that big of a difference would raise a flag for me.....

[This message has been edited by 88blkiroc (edited May 19, 2001).]

 

You are correct in what you are saying. The SR Torquers are not the best cast iron head. I just meant for the price they are not quite as bad as you make them sound. If you really want performance you should go with aluminum and probably AFR's from what I've heard. Iron Eagles are excellent there is no doubt. If you stick with the stock TPI induction setup just be careful not to kill the intake velocity with all of that porting. You are also correct in putting your hard earned money where it will do the most good and that is in the cylinder heads. Yeah, you're also correct about world castings possibly tooting their own horn but it is always wise to question what you read even if it is in a magazine.

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'85 Sport Coupe V6 T5(bought new)Put in 88 350 TPI/700R4 and a bunch of 88 IROC and aftermarket performance parts.

 

We are being very conservative with the head proting on my darts. Pretty much just taking down the valve guides and polishing them. The S/Rs are a different story since they are going on a carbed single plane 400. Sorry if i come off sounding like a know-it-all, but my buddy gave me an education on heads and i dont want to see someone spend their hard earned cash on somehing thats not as good as they think. I know all to well the story of hey you see it in a magazine and it looks good hey lets buy it. Just dont want to see anyone else get burned.

 

Are the Dart heads emissions compliant? Do they have the crossovers? If not, what do you think is the best emissions compliant cast iron head? Not trying to be a smart a** I really don't know.

 

my goal is 300hp (to play with LT1's )and i know that one of the best mods r heads...but i dont want to kill the daily drivability or mileage or fail emmisions.i would like to stay with a cast ironheadsi got the cam,rollerrockers,and headers. is it possible to get 50 hp with stock L98 heads? runners, pulleys? ignition? hmmmm

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

Glen,

I would say no. I got set of 200cc intake 64cc chamber heads iron eagle II's and mine don't have a crossover passage. Totaly non- existant.

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89 Iroc 350 TPI,
Forged pistions
Comp roller Cam .510 lift 230dur
Flowmaster exhaust
Dart Iron Eagle heads 200cc runners 64cc chambers
MINI RAM SOON!!!!!
stock TPI for now 24# inj

 

AaronIROCZ,

do you feel the 200 cc port volume is too much for a TPI setup?


(I know you plan on getting a miniram)

James

 

Glen, im pretty sure that they do not have the exhaust crossver. I do not think they are emmisions legal. I really dont know which heads are emmisions legal and which are not. I dont worry about it too much so i really havent taken the time to look. Ill get back to u if the Darts can be modified to run with the emmisions sytem or not.

Eddie89TA- u dont need 300hp to beat up stock LT1's Im running 13.8s on the stock motor (.030 over, still stock IMO) with radial tires. Its a myth that L98's can't go fast with just bolt ons.

Any ideas what id have to do to my car to run these dart heads anyone??? I didnt consider any crossovers or anything. Do i just slap them on and run or do i have to modify the emmisions system. Im not worried about keeping it sniffer friendly, the cats already gone (and i still passed my emmisions test )

 

BTW heres my sig just incase u wondered what u go to do to hit 13's Im running 2.77 gears with BFG Comp T/As, manually shifting, cutting 1.9 60's, and getting between .7-.5 R/T's.

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1988 IROC-Z L98
License Plate: STG KLR 1
Engine Mods:
Edlebrock TES Headers, Hypertech Chip, Flowmaster Muffler, Intake Airfoil, Removed MAF Screens, MSD-6A, MSD Blaster 2 GM Coil, bored .030 over, Other minor mods
Suspension Mods:
Lakewood Traction Action Lift Bars, Hal Rear Shocks
Trans Mods:
2,500 stall converter, Redline clutches,Heavy Duty Steels, Trans-Go reprograming kit , Heavy Duty 2-4 band, Corvette Servo, B&M Mega Shifter w/ Carbon Fiber Handle (looks sweet in a black car!)
ET: 13.833@99.30

"If you can put it on your car, its fair" Quote By Guido
Foundering Member of the Illinois Overkill Crew (IOC)
www.mfba.org

 

I ended up putting World SR Torquers on my car because they were emissions compliant even though they are a compromise in performance. With the 110* heat here in the summer and the fact that I have known several people with aluminum head problems after an overheat situation I definitely wanted cast iron heads on a cast iron block. Lingenfelter said in his book on small block Chevys that you can make 400 ft.lbs. with the Torquer heads though. He seems to think they are o.k. for the money. It's a tough call. The 87+ heads from PAW were $749 ready to bolt on. I guess it all depends on how deep your pockets are.

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'85 Sport Coupe V6 T5(bought new)Put in 88 350 TPI/700R4 and a bunch of 88 IROC and aftermarket performance parts.

 

World Product Heads 87 & up intake face 67CC
1.940x1.500 P/N 43610. I have them on my new engine.

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1987 Black Camaro IROC-Z (original owner) Replaced LB9 @ 86100 miles.
New 350 Crate engine
Balanced & blueprinted
WP 67cc Heads 9.6:1 C.R.
Cam: 450lift,216dur@50,110ls
TPI Induction(from 305)
22# Fuel Injectors
SLP Intake runners
New Computer chip
K&N filters & Air Foil ,
Hothkis STB
SLP 1 3/4 Headers
CATCO 3" Catalytic conv.
SLP 3" Cat Back Exhaust
700R4 Auto
SLP Torque Converter (2400 stall)
Limited Slip rear
245/45/ZR-17 Tires
17x8.5 ATI 5 Razze Wheels
EST. 340HP
380#/ft of Torque
NEW TOY!

 

Just checking new signature

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Red '85 MPFI V-6 T-5 Sport Coupe (bought new),now an IROC in sheeps clothing.
Rebuilt and installed '88 IROC L-98 TPI,700-R4,3.27 posi/disk rear,instrumentation, steering gear, and all suspension parts (even the wonder bar)
Mods:
IROC wheels, Hi-perf. rebuild on 700-R4,TCI sizzler torque conv.,B&M megashifter, L-98 .030 over,balanced,decked,blueprinted, SR Torquers, KB pistons,9.1:1 CR, port matched stock TPI, comp cams .450/480 206/210 cam, all free mods, Edelbrock TES/jet hot coated, CATCO cat, Hooker catback, MSD 6A, airfoil, AFPR, K&Ns, polygraphite bushings all around, 1989 IROC memcal in summer, ARAP memcal in winter.

 

my problem is that with 87 and newer intake face for my 5.7 they only come with 76cc chambers...stock is 64. the pre87 are the only ones that come with 67cc chambers (to keep compression)with .18 gasket.and if i get pre-87 i have to modify my stck intake bolt holes to match...i can get them for 660$to the door.hmmm i am also contemplating edelbrock heads....1100$

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

Something you might want to consider. The iron heads from the L98 responds very well to porting. Even Ray T. Bohacz has stated so (better known for the Info Tech section in GMHTP magazine). Fully ported with undercut, swirl polished 1.940”/1.50” valves, we’ve gotten a best of 13.19 second @ 104.3mph time slips with them in conjunction with the Miniram intake, cam and headers. With 2.00” intakes and 1.56” exhaust, performance might have been better. This is normally aspirated BTW. The cost of having them rebuilt and fully ported was just under the cost you would pay for the SR Torquers, yet will had better flow. The SR’s are just Stock Replacements. They are a heavier casting compared to stock heads. The SR’s are good heads for the price though. The exhaust side could use a valve guide reduction and full polishing though. Angle milling will be necessary to reduce the chamber size from 67cc to 64cc(stock) and maintain the stock compression of 9.3:1. Hope this helps.

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N/A 406, TPIS Miniram, 58mm TB, 30lbs injectors, Custom Ground Elgin Cam, Ported TFS heads, SLP 1-3/4", & DFI computer.
11.70@117mph

 

eddie87TA
Check my post on the 67cc 87 & up intake
face. WP's has these listed on their web site.
I gave you the P/N. Check it out.

 

i called wp and if i remember right they told me the only 67 cc chamber heads are the pre87 i will call them back again to double check u got a 350 right? i hope u r right coz i aint in themood to modify my intake holes if i dont have too..i figure the SR torkers would perform as if u could bolt vortecs on tpi just about the same specs.. what u think

 

I cant believe none of you have suggested the Trick Flow G2 twisted Wedge heads. Done do edelbrock. I've heard horror stories. I love my G2's. Go for it.

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