BatSipJet

Will this pair of heads bolt on to my engine without any problems?
1.94/1.50 - 58cc
http://amperformanceheads.com/58cc.htm

BatSipJet

nevermind, i found out that they dont fit.

jackdiamondback

You may have noticed my post from the other day about aluminum heads for a 1986 IROC 305 TPI. One person said I could use L98 Corvette heads. GM says this is not correct. Another person said I could use a Trick Flow head, as long as lift was below .650. However, I talked with Edelbrock today and they tell me lift cannot exceed .450. Their Performer head, 60909, will work. AFR has no head that will work. As far as I can tell, only the Edelbrock head will work if you're going aluminum. However, it means a roller or solid cam is out since I cannot find one that is .450 or lower. Of course, you could always buy a new set of 305 bare iron casings from GM and have them all gussied up. It would end up costing more than the Edelbrock heads, so that's what I'm going with. Comp and Crane make some pretty good hydraulic cams that are pretty aggressive and will work with the Edelbrock heads.

Stu

jackdiamondback

Howards Cams makes a hydraulic roller that looks like it will work with the Edelbrock Performer heads (.435/.452). If Edelbrock is correct that .450 lift is max, I'm hoping that .002 won't be a killer. I will calls Howards tommorrow and let you know what the say. It really pisses me off when people tell us 305 owners the engine is crap and get a 350. Hey, if they're such crap, how come the IROC Z was used in the International Race of Champions for ten years?

Stu

N8MAN1068

you can use aluminum L98 heads, from vettes
casting 8113.
they seems to slide on right nice on my 305...

jackdiamondback

Can you get these heads from GM? If not, who sells them. It's weird that GM told me these heads wouldn't work and Edelbrock essentially said the same thing. Thanks for the info.

Stu

BatSipJet

I want to build up my 305 slowly because i am just a kid in high school and i dont have alot of money. I want to be able to say that i made a fast 305 in the future and NOT a 350. My friends at school have 350's and Lt 1's and Ls 1's but they dont treat their cars right. They only look at the cosmetics of the car and not the power. Or they get their parents to buy everything and have it installed. I want to say that i did the work on my car and i earned the money that i put in my car.

I want to get some desent heads that i can either just swap in or right now i am contemplating on rebuilding my heads that are already on there buy port/polish/new valves/springs.... the works.

thanks for all the information on this topic and keep us posted on the phone call you make. I have been using the search button and finding all sorts of help and information that i didn't know.

Simon

jackdiamondback

I know for certain that Edelbrock Performer 60909 works. Cam lift cannot be higher than .450. Engle Racing Cams and Howards both make hydraulic flat tappets cams with right about .450 lift for both intake and exhaust. Lifter kits that match are available. I will let you know what I find out about the L98 heads. Also, it appears that Pro Top Line makes a set of 23 degree heads for the 305. Don't know yet if they work on pre-1987 with TPI. And they are really cheap--$795/pair. Hey, I'm a geezer who just retired so don't worry that you're just in high school. Cosmetics are nice, but speed is better (as long as you're careful). Cosmetics can come later. Out here in the Oregon desert, we have roads that go 20-30 miles and are as straight and level as any drag strip. My 1980 Z broke the speedometer at about 1/2" past 130 on one such road. This Z had a really extreme 350. Between us, lets make these pinheads who say it's a waste of money to build a 305 eat their words. And I know without any question that more than 300HP is a reality.

Stu

PS: You can't get a better set of headers for the 305 than the Hedman Elite Ceramic Coated. The price is right. You will have to have your shop call Hedman for the modifications needed for the passenger side. If you're not in California, these headers will cause you to lose all emissions control gear except the catalytic converter. Just by losing the air pump, you will gain a few ponies.

wesilva

iTrader: (35)

No one has mentioned it on this thread but Vortecs milled to 60cc chambers will work on a 305. The factory castings are a bit thin but it has been pointed out to me that it can be done. Protopline Vortecs have a thick decks surface that is advertised as able to go as little as 50cc with plenty of deck left. I believe it! My Protoplines are very thick in that area.

BatSipJet

I am only a 30 minute drive from oregon and i have been on thoes open roads and they just dont stop. If you follow the Columbia River, the roads arent quite as straight but they run for a couple hundred miles.

O, i had a question on the Edelbrock Performer 60909, they say it will fit up to 1986? I went and looked form them and this is what i found.

Designed for 302, 327, 350, and 400 c.i.d. engines up to 1986, these heads have the same powerful design and combustion chambers as the straight plug Performer RPM heads plus an exhaust crossover passage for emissions equipment compatibility. These 50-state street legal (E.O. #D-215-46) heads work with the Performer Power Package and provide outstanding street performance. Performer heads with 64cc combustion chambers improve performance and retain stock compression ratio on 1970 and earlier small-blocks. Hardened pushrods required.

Is this right or will they fit my 87?
Thanks

Simon

jackdiamondback

Bat: The Performer is for 305s with all of the emission control garbage. The RPM is a non-EGR head. My 1986 305 has had all emission control contraptions removed except for the catylic converter. I have "cheaters" that make the computer think it's all still there. The cat will accidentally fall off in the near future so I can add 2-1/2" duals with MagnaFlow high performance mufflers. If you have an '87, I guess you need the Performer. If you call Edelbrock, they are more than happy to talk to you. Washington or Idaho?

Stu

BatSipJet

I bought my car in California and it has all the emisions stuff on it. I now live in WA. I will get a hold of them to ask if they will fit a 87.