Here are the heads I have http://www.airflowresearch.com/index.php?cPath=24_33 part# 1054 and it says: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads. Ok so the HSR manifold is a 1205 gasket and it looks pretty ugly next to the AFR intake ports that are a 1206 gasket. Theres got to be something I can do to make this a smoother transition. Should I just go ahead anyway and get them port matched as close as I can? I do Know that I dont want to leave as is, Dont know if it matters but Im running a 383 with this cam: http://www.compperformancegroupstore...ode=RLERCAMXFI Thanks for any help.

 

Where does the 1206 not match the heads?
Could you not trim the gasket to perfect fit on the heads and then use that as template on HSR?

But you might have a problem getting a HSR out to a 1206 ( depending on version you have )

https://www.thirdgen.org/forums/post...411-post7.html

 

Wow... that looks like alot of work. I took some photos of the 1206 gsaket first on the head and it looks like it fits right on, the other photo is the bottom of the intake manifold.. and is doesnt look as bad as I remember it being, maybe I should leave it. What do you guys think? Would you just run-er as is?

 

Ok... Am I the only one running a HSR with AFR 210's? Just looking for another opinion on whats best.

 

You can run it as is or you can portmatch the intake a bit more.
If you wana port intake now is the best time.
your car your call

 

Port the intake as much as you can to match until you run out of sealing room around the port. I cant tell from the pic if you have the newer base or the old base but it looks like you can get to 1206 and still leave room for intake seal. Just use RIght STuff around the ports. Old base can be 1205 ported but not 1206 without leaving little sealing metal around the intake.

https://www.thirdgen.org/forums/alte...sr-change.html

Dont use the gasket but make a template of the AFR intake flange and lay it on the HSR. Port alignment is critical here.

Not only port match, try to open up the radius in the 4 runners that are not quite centered on the intake. 4 ports run straight down to the head port, but 4 have a slight offset to them and are actually abit smaller in cross section in the middle of the port. Opening up those will help improve flow.

HSR is not really 1205 out the box..you can take out decent amount of material to make it fit 1205 port. 1206 is only slightly taller and almost same width.

I just finished porting a 1205 victor E EFI intake to 1207 for my new heads...theres a HUGE difference and the ports now are cavernous. Victor has plenty of room to go to 1207 tho. Its a great intake.

With 292 cam and those heads, it will need all the airflow it can get from the intake. It will want to rev to 6500+

 

I have the newer style 2007 year. So what kind of tools am looking at to do this sort of job? I have a dremal.. what type of bits?

 

dremel can work but it takes alot longer. You can use a combination of grinding stones of various grades and sanding drums to fine tune the port and smooth things out.

A big 1/4" shank die grinder with a carbide burr will eat thru aluminum like butter and really cut down the time in porting. Just rough cut the port with that and finish shape/smooth with a sanding roll

 

I have a stealth ram (old style) and a set of brodix track 1s that are ported and port matched to each other. I had to have mine welded up and then re-machined and it works great. On a flow bench through the heads and complete stealth ram all bolted together it flowed a little over 300 CFM. I have to trim a 1206 gasket a little when I put it all together. It zings past 6800. The factory regulator is crap though. I had to buy a Kirban. Mine would go from 46lbs at an idle to 32 when you hammered it.

 

So did you do the port/port match yourself? If so how did you do yours?..in detail please. I want to do it my myself but alittle scared of messing it up. I also dont want to pay a guy to do what I could probley do. Kirban..check.

 

I did a lot of it myself. As I did it I could see that I would have to have a friend of mine weld some extra material to the ports. After he welded it I had it resurfaced at my machine shop so it would be true. The guy said it was off pretty good. If you look into the top of the runners there is a short side on each runner that goes into the port. That is where you want to remove a lot of material and really open it up. About two inches above the head is where you shape it to enter the cylinder port. One inch above the injector is where you want to start gaining air speed. I really opened up the top of the runners also where the plenum bolts to it. I let a friend of mine finish it in Yale, Oklahoma named Greg Vandeventer. He ports ZR-1 90-95 LT-5 Corvette heads and plenums and has a flow bench. he did my 90 ZR-1 and with a 390 lift factory cam if flows over 300 CFM. He knows port work. Call him and mention Allen Bray in Arkansas and he will give you a discount. He is very cheap anyway. I sent him my heads and stealth ram and he finished it up and flow benched it. They all flowed a little over 300 CFM about like the ZR-1 heads and plenum. All of this was when it was all bolted together with a 58mm throttle body. Go get a 1206 gasket and place it on and mark it with a marker and you will see where you need to port and where your welder will need to add material and also how much. I could port mine even further and have thought about cutting one up and making a stealth ram fit a set of 12 degree brodix heads like the sprint car guys use. Those heads flow incredible and could easily make 700-800 street driveable HP especially in a 434. We all know that the bigger the bore the better the heads flow since the cylinder wall is not in the way of the valves.

 

Could you PM me a phone number to reach Greg? Tryed to google him but found nothing. Thanks.

 

Gregs cell number is; 918-373-3739. His home number is; 918-387-2837.
His e-mail is: gvand@ilinkusa.net be sure to mention my name (Allen Bray) and he will give you a discount. He works at mercury marine in Stillwater but lives in Yale Oklahoma which is about 20 miles East. He is a great guy and as cheap as you will find. He did the port work on the black widow ZR-1 that held the 24 hour speed record from 1990 untill recently. It was a project that he and a fellow employeee named Scott did in conjunction with Doug Rippie. He can port about anything. I spent the weekend with him back then at his house and helped with the port work and I actually lapped the valves in my motor; all 32 of them. Then we went to Scotts house and put my motor together and I came back to Arkansas.

 

Well I found time to call Greg and talked about porting the HSR, turns out he is moving to Fond du Lac WI for a while to work at the Mercury Marine plant here. The great thing about this is its only 40min from my house, so Greg is going to call me in two weeks when he gets here and we'll hookup sometime to swap some parts.
This couldnt have worked out any better..now I dont have to pay a arm and leg to ship my intake and possiable heads to Oklahoma. I told Greg I hear he does great work and i would be willing to pay him whatever for is time, also told him I would buy him dinner and some drinks. If he's not a Packer fan now he will be when he goes back to Oklahoma. Thanks again Allen.

 

As I said, Greg is one of the best guys I have ever dealt with be it car stuff or whatever and I am proud to have him as a friend. He and his family have always been at the top of my list as far as good people go. Sadly, most of the people at the Mercury Marine Stillwater plant are going to lose there job due to the plant closing. This will affect many people including Greg and his family. Greg is extremely talented and could probably go to work for Lingenfelter or one of the high-end conversion shops if he wanted to but he does not want to leave his home which is understandable. Greg is famous in the 90-95 ZR-1 corvette world.