Give me some info please!

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1992 Camaro RS 3.1L
T5 Manual 5 speed
Cold/RAM air intake
Z-28 Exhaust
8.5mm MSD Ignition wires
TB Coolant bypass

Soon to be a 3.8L turbo RS

AIM screen name - Stopsign696

Kills:

95 (****) Probe GT
94 Mustang GT
91 CRX (dont ask me why he raced me)
2nd Gen Z28 (350) haha to you V8 guys!
1992 RS 305 TBI (good race)
First Gen Integra
More to come

 

My dad says cast iron for it's strength. I personally would seriously consider aluminum. It's a weight issue. Whatever you want: strength and durability or weight.

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My only mod: Flowmaster 40 series

 

Duh Aluminum, no info needed. How many race cars do you see running that have cast heads?


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86 Trans Am 355 TPI Rebuilt 700R4 with Corvette servo, modified valve body, and a B&M Torque Converter (2000 rpm stall w/ lock up), 87 350 block bored .30 with new crank, bearings, rings, and magnafluxed rods. Reworked 305 heads with 3-angle valve job. Added in the rebuild was an SLP TPI cam, BBK 58mm Throttle Body,SVO 24# injectors,MSD 6A, Hypertech Power Coil, 1.5 Crane roller tipped rocker arms, SLP Intake Runners and Port matching in upper intake including fully ported plenum, TPIS adjustable fuel pressure regulator @ 46psi, Hooker shorty style headers w/ Thermotech heat wrapping, Custom 3” exhaust with Flowmaster muffler and chrome quad tips, Hypertech Thermomaster Computer chip, K&N open element cone filter on modified MAF per TPIS specs, MSD Wires, removal of A/C hardware and a 1LE firewall cover installed. Also there has been a PST front suspension kit with Hotchkis strut tower brace
http://geocities.com/SunsetStrip/Garage/9548/kyle.html

Kills:
95 Talon TSI, 96 Probe GT, 91 T/A L98, 89 RS, 86 Mustang GT, 88 Mustang LX 5.0, 92 Thunderbird V8. couple or ricers that I think were Civics or Preludes not sure what year, 95 Celica GT-S, 94 Chevy 1/4 ton 350, one of those NASCAR F150's ..... **** on Monkie
SOON TO BE A SUPER CHARGED TURBO WITH NOS ON A 500000 CU. IN engine

 

Hang on their Kyle...there are a lot of benefits to cast iron heads. Scope out the replies to this same question in the General Tech section. Frankly, on a street car, I am pro cast iron for primarily for durability and maintenance reasons. Wait until you cross-thread a spark plug in that $1,000+ aluminum head and you'll wonder why in the hell you ever went with aluminum.

Also, while aluminum heads disipate heat better than cast iron, this isn't necessarily a good thing. A "hotter head" makes for better combustion. This is part of the reason you HAVE to raise the compression ratio on an aluminum head. Not just because the aluminum head can support a higher compression ratio. If you have identical heads, one aluminum the other cast iron, same compression ratio too, the cast iron head will produce more power.

But don't forget that aluminum heads are far more prone to warping. That is why the GOOD aluminum heads (AFR) have a thicker deck. Extra strength to resist warping.

The primary reason they use aluminum in racing is weight savings and the fact that aluminum heads can be repaired and ported easier. In racing they don't use the same part for YEARS, so duribility over the long haul is not the same issue as a street car.


[This message has been edited by Glenn91L98GTA (edited December 28, 2000).]

 

yeah, i'd go with on heads myself. Alluminum heads are known for Warping, and that's a bitch, especially after you've paid mega bucks for the heads, now you need new ones. They do save weight, but the repair bill probably won't be worth the .001 on your 1/4 mile time.

 

I dont think they make alu. heads for our engines. Just pick up a set of iron heads, port them out, and get a multiangle valve job done.

 

Yea sorry Kyle I just dont have the racing expertise of you.


Which ones would you guys get for like street racing? My goal is to be able to beat an escort (I know Ill need alot more mods other than heads). LOL, but for real....

------------------
1992 Camaro RS 3.1L
T5 Manual 5 speed
Cold/RAM air intake
Z-28 Exhaust
8.5mm MSD Ignition wires
TB Coolant bypass

Soon to be a 3.8L turbo RS

AIM screen name - Stopsign696

Kills:

95 (****) Probe GT
94 Mustang GT
91 CRX (dont ask me why he raced me)
2nd Gen Z28 (350) haha to you V8 guys!
1992 RS 305 TBI (good race)
First Gen Integra
More to come

 

And yea they do.


------------------
1992 Camaro RS 3.1L
T5 Manual 5 speed
Cold/RAM air intake
Z-28 Exhaust
8.5mm MSD Ignition wires
TB Coolant bypass

Soon to be a 3.8L turbo RS

AIM screen name - Stopsign696

Kills:

95 (****) Probe GT
94 Mustang GT
91 CRX (dont ask me why he raced me)
2nd Gen Z28 (350) haha to you V8 guys!
1992 RS 305 TBI (good race)
First Gen Integra
More to come

 

Yes BUT!!!! Monkie is tryin to get to the 11's or 10's. I would say hes not too concerned with the durability of a car like that. That was why I was quick to reply to his question. YOu can runner higher compression and more timing with Aluminum heads. I don't see many cars in the 11' or 10's with cast heads. I mean lets count up some more benfits, Wiehgt reduction, less unsprung weight, easier to port, and they look cool to. That does count right?

 

Kyle, the ultimate choice between aluminum and cast-iron depends on you preferred application and availability. For my TPI car, I really don't have too many choices if I want good flow. Either AFR, AFR or AFR. That is why I am considering a different intake so I can broaden my choices.

Even the flow characteristics you should chose will depend on your application. 210cc mega flow heads at .600" is of little use on a daily driver. Conversely, a smaller yet higher velocity port head is of no interest to a person who wants an all-out strip car that will never see any street action. Everything else in between, is a compromise and trade-off.

What I want my car to do and what you want your car to do is most likely different and so final our choice in heads will most likely be different. Even if we had the same engine (L98).

PS: Can you guys keep this thread to a logical discussion of the facts and not another mud slinging match that requires the thread to be locked? I think this is a good question to contemplate and discuss.

 

i think that's the biggest issue. I know Monkie's gonna want to run 11 seconds, but i'd be thinking for the time being, he just wants better performance correct. And last i checked, monkie's car isn't on the nascar circuit, so they won't be replacing the motor after every race. If you entend on having a trailer queen, that you'll take to the track, race, put on the trailer and take home, or do you want a car, that'll do good in the street races. All in all, i'd say go with a better flowing iron head, port that head out, and go from there. If you'd like to get the best heads for 11 second times, i'd say, wait on it, save some more money, port your stock heads now, and then get the good heads when you're getting your TT's.

 

Iron all the way. My grandpa works on engines and I asked him the same thing. He said a good set of iron heads go for $300 a pair here in MO because people will buy aluminum heads for their V6's and then they will warp, so the people will want to go back to the iron heads to avoid the problem. But alas, they already got rid of them. So I would say stick with iron.

Vman

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1969 Camaro
383, Corvette heads, 700R4
Resto is in progress

1988 Toyota 4-Runner
aka the Parts Hauler

Previous owner of an 89 RS Camaro
2.8L V6, 700R4

 

Aluminum is by far the better choice,I have a set of Brodix Track1 heads and a Miniram on my 355 with no complaints.

Monkie,I'm not sure if your talking about the 3.8 or not but I thought I'd let you know there are plenty of people in the 9's and 10's with ported factory heads(you don't even have to pull the heads off to go low 11's).As for the 3.1,I don't know anything about it sorry.

Steve

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TTA#124-129,bone stock.Cloth/T-Top Festival car
TTA#850,bone stock,best 13.68@100
TTA#861(almost sold),near stock,best 11.99@112.26
TGTA#01,nowhere near stock,9's or bust
Pics and info on My Cars
TTA850@TurboBuicks.com

 

Monkey stick to your iron heads and have them ported and polished, why do you think that the Iron Eagle V8 heads are so popular among street racers. They take a pounding and with the right valve and port/ polish job your iron heads can flow just as well as decent aluminum heads, the only big diff, as you know, will be the weight.