I figured I would post up some of the tech info from my current engine since there isn't a lot of information beyond stock vortec heads. I'm upgrading to the AFR Vortec 912's. I did a lot of searching before purchasing them and could not find any information anywhere besides that they exist. This post will be picture heavy. Also I'd like to keep this post strictly technical, any questions about how it ran/improved send me a pm. If I get enough questions about that I'll start a different post.

The old setup pertained of stock 906 vortec heads, and a Holley/Weiand Stealth Ram 7542. The intake ports on the stealth ram are pretty small, even compared to the 906 heads. Here are some pics showing the ports with the GM 89017465 gasket.

Stock 906 ports






Stock Vortec HSR

 

AFR 912






Currently I have the HSR at the shop to be ported to match the gaskets, once I get it back I will post pictures.

-Jim

 

What gasket is that? I bought Fel Pros for my vortecs, and I don't like them. They are over 1/8" thick and the port openimgs don't line up.

 

It's a GM gasket p/n 89017465. Its their latest revision, I did a lot of searching because of all the issues they had with them. Most people had the least problems with the latest GM gasket. Worked great for me for two years, and they are reusable.

-Jim

 

I think those are the better gaskets. They should squish down when tightened, if, they are the the ones I'm thinking about..

 

I also used the ARP bolts over the GM bolts. There are a couple different fel pro gaskets too, Did you get the problem solver ones with the metal core?

 

No, these are just thick dark gray paper. 1255 maybe? I'll have to check the part number, but it was one that kept getting recommended on nastyz28.

 

Here is the other fel pro gasket:

http://www.summitracing.com/parts/FEL-MS98000T/

 

I just checked, and mine are indeed the 1255s.

 

Those are the ones I was thinking about. The vortec gaskets are quite a bit thicker than the regular sbc intake gaskets.

 

Thats the nicer fel pro, the 1255's I've heard have a lot of issues. Could be people over torqing them, I have no experience with them though. The latest fel pro and gm have metal bracing around the bolt holes so they can't be over torqued.

 

These are the gaskets I've used. I even reused this particular set for like... at least 4 different manifold installations before I replaced it. I had a junk set of heads, then replaced those, got a cracked block, and a few other things, but I had the intake on and off several times before the motor was in its current state, and although the motor had problems each time there was never any evidence of any intake gasket leaks. This particular time was the time my cylinder wall in my .060 over block cracked...



I loved these gaskets, super easy to work with. Pretty sure they're Fel Pro, but they may be GM.

 

Those look like my GM gaskets, the new style fel pro has the metal blockoff plate between the intake ports, the GM has the three windows. Funny you have red "o" rings in the gasket, mine are black. Can you get any numbers off of them?

 

Maybe they are GM... I last saw them around 3 years ago when the engine decided it felt like staying together.

But Ive had great luck with them as far as sealing, even after repeated uses on different heads. What was "wrong" with the earlier revisions?

 

Lots of coolant leak complaints from what I read

 

Here is the other style fel pro gasket p/n MS901312. They are the same as the GM ones

 

Well now I'm really starting to wish I didn't open the package for the 1255s.

 

Gasket Part Numbers
GM - 89017465 - Plastic w/rubber seal, metal rings around bolt holes
Fel Pro - MS901312 (Same as GM)
Fel Pro - MS98000T Problem solver kit, metal core gasket

 

Available Vortec Heads

GM
12558060
10239906
12558062 - Assembled Iron
12529093 - Bare Iron
25534351 - Bowtie Sm Port Bare
25534421- Bowtie Sm Assembled
25534445 - Bowtie Lg Port
25534446 - Bowtie Lg Port Assembled
12497186 - Aluminum Bare
12464298 - Aluminum Assembled

EQ Lightning
CH350H - VORTEC HYBRID W/HEAT RISER 69-86 INATKE BOLT PATTERN AND PERIMETER VALVE COVER Iron
CH350G - 87-95 VORTEC HYBRID W/HEAT RISER MARINE/AUTO USE Iron
CH305B - 305 CHEVY 96 UP VORTEC 1.840" VALVE Iron

Patriot
2150 - Bare Iron
2151 - Assembled Iron

Summit
151124 - Iron

AFR
912 - Aluminum

RHS
12410-01 - Iron
12410-02 - Iron

Scoggin Dickey Parts Center
SD8060RA2 - stock iron casting modified for 600 lift

Dart
10024370 - Bare Iron
10024370A - Assembled Iron

Edelbrock
60959 - 170cc Bare Aluminum E-Tec
60969 - 200cc Bare Aluminum E-Tec
60979 - 170cc Assembled Aluminum E-Tec
60989 - 200cc Assembled Aluminum E-Tec

 

subscribed! I'm really interested in these heads.

 

Me too, only thing I am waiting on is the intake. It's stuck in porting prison.

 

Got the manifold back today, a lot of material was removed should see a nice improvement.

 

Update, AFR moved the accessory bolt holes on the heads. The early non serpentine power steering brackets won't work.

 

Any more word on these?

 

Nothing more than the look really pretty collecting dust with the rest of the car. I've been to busy with my house. Good new is the house is almost done so I hope to get back on it soon.

 

Car is running and it is running well! If it wasn't the cold season I'd get some ET's. The car definitely feels like it picked up some but right now it is hard to quantify.

-Jim