So I just got a HSR and want to change my heads as well. I wanted to go with the afr 1040's but they might be just out of the budget. Anyone recommend anything else that works well with what the hsr flows. I am running a 350 with a mild street cam.

 

Darts are a little less. If it were me save a little & get the good stuf the first time. Wish I did!
Not saying Dart is bad far from it btw

 

Small cam then i wouldnt worry to much about over heading the car. Afr 1040's are sweet heads and 500 hp capable. But you wont get there with a cam under 230 deg, well maybe with a real aggressive 220's lobe.

Dart shp's, profiler/jegs heads and few others in that sub 1200$ range would work well for 400-450 hp if cam is mild. Granted an afr head with mild cam may make few more hp than these other heads but how much is hard to say and is it worth the $$$ factor? All depends on what you are trying to do. I am a huge fan of best head you can afford and running smaller cam, rather than running so so heads and big cam to make up for it. Then again big cams sound cool.

 

I am working on a whole new build and looking for options and opinions. I am using my existing bottom end. Starting with HSR, new heads and cam and switching to an EBL for tuning. I am thinking of the xfi 268 cam or cc503 I think it was that worked well with the HSR. Trying to get to the 400hp mark or more.

I am really into the 1040's though. Anyone know if they are 1205 and not 1206 due to the HSR limitations.

 

1040's are like a 1205. That with a 268 xfi is a very nice combo. 503 also would work but afr's seem to like smaller duration splits between intake and exhaust. I ran something completely different on my car and it worked very well so the valve events may not be as critical on exhaust side as they are on intake side

 

The 1040s are a 1205 intake gasket. I wouldn't go any smaller than that xfi268 camshaft. I went with the LT4 "Hot cam" and found myself wishing I had gone with something of a more aggressive profile. I was running the HSR, Trick Flow heads, hot cam and MegaSquirt. Ran well and totally streetable, no problems in parking lots or anything.

 

Good to know.. I may save my pennies for the 1040's. I may go to a bigger cam after looking at the 268 since I have a 2500 stall converter and want the nice lope..

Thanks for the input

I also thought of the LT4 cam. I do want it to be streetable but it is not by any means a daily driver.

Tibo which trick flows are you running?

 

268 wont have much lope but the 280 will have some in a 350. However its alittle bigger than what you want from the sounds of it.

Just order the xfi 268 on a custom 109-110 lsa for alittle more lope

 

I am ok with a big cam as long as it will match up with everything together. And not be to hard to tune. I just chose those 2 because I saw it was recommended to work well with the HSR and others here were running them with good results.

 

Hsr will support bigger. 280xfi is as large as i would go on a 350. With a good 190-200cc head its all top end to 6500-6700 rpm. Definately a screamer but mild mannered enough to tune fairly easy and drive around. 2500 stall will be driveable but with cams over 224 deg it will need 3600 or more for optimal drag race times.

If you dont track as often it will be fine on street with 2500

 

I was using the trick flow Kenny dutteweiler heads from a few years ago that I ported after reading David vizards book.

 

Not to bowhog but, I've a custom cam that basically is the 268xfi, just has valve lift at .571/.566 instead of .57/.565. Everything else is the same. Does the same info you gave to the OP about heads for the 268 apply to my cam as well? I would assume so but I've had a bad history with assumptions. lol

 

Not sure who the question was directed to but i feel a 268 advertised cam which usually ends up being around 218 deg at .050" is a good match for up to 5500 rpm operation peaks in a 350 and heads usually need to be 180-195cc. I dont have pipemax available right now but that should equate to a cross sectional area of 1.85-1.95 inch square for a 350 in that rpm range. 276 advertised will want to peak closer to 6000 on a 350 and should use 1.95-2.05" square heads which again are your 195-200 cc varieties. 280-286 deg advertised cams can use 195-210cc heads and peak upwards of 6500 rpm or so.

Now a 268 cam with .503" lift wont hold on to rpm or make the power a 268 cam with .571" lift can if the heads and intake are capable of flowing more at .571". More lift can increase valve lift area and thus pass more air in same time so it may not choke out as soon.

 

So basically they are the same, just mine won't choke as soon. If I follow correctly...the cam is at my parents' house so I can't look at the card right now but I remember seeing everything matched up with 268xfi except for that .001 on intake and exhaust.

 

Likely is about same. Hard to notice a .001 difference . Valvetrain will flex more than that

 

Another question...I was hoping to run Vortec heads....found these on ebay

http://www.ebay.com/itm/NEW-PAIR-350-CHEVY-VORTEC-CYLINDER-HEADS-96-up-2-02-STAINLESS-VALVES-906-062-/271057279800?pt=Motors_Car_Truck_Parts_Accessories&hash=item3f1c45db38&vxp=mtr
Do these seem too good to be true?

 

Sounds abit cheap for a 185cc head. Check with them to see whose casting it is. Sounds like a patriot performance head but not sure if they are cast iron or aluminum. Gm small port bowtie heads are 580 each so those cant be it

Scoggin dickey had vortecs for about that price for a pair but dont think they were 185cc

Ebay is full of knock offs

 

That's what I was assuming as well. I'll give them a call.

 

Said Prostar...aka overseas...don't know if I wanna catch them or not.

 

Remember that the HSR is a 1205 port and making one fit a 1206 is a major undertaking. I think they flow 275 out of the box so if you can find a 1205 head that flows around 275-285 then it would match well. I spent months on mine matching it to a set of massively ported track 1 heads. Mine ended up flowing 305 through the entire set-up bolted together including throttle body. I would not do it again.

 

Look at Pro-filer stuff, have equal flow numbers to afr stuff for 4-500$ less....or Jegs and summit are carrying promaxx which are former patriot castings and they did really well for a sub $1000 head. I had a set of patriot 195's and was really happy, I just bought a set of 195 pro-filers and will know in a week or so how they do but hearing some pretty incredible flow numbers and feedback.

 

Did the guy who started afr come from Patriot heads?

 

I am not sure but i dont think so. Afr has been around since the late 70's early 80's i believe. I dont think patriot has been around more than 10-15 yrs? Not sure but seems like patriot is now promaxx

 

Was it Cannfield then?