Sold my "781" Iron Ovals yesterday. Got 1250$ for them.

My engine must be raceready in a month so im in a hurry for new heads.

Now im having a 468cui with comp XR292 roller. But my plans are 540cui+ I´m using EFI. The car weight is 2800lbs, 4500 stall on 300 shot nitrous. 4,11-4,88 gear and 33" tires.

So im looking in Canfields 350cc Rect. Buying them bare will cost me 1274$ then i need valves for about 160$ I have new springs. Guideplates, retainers, stud bolts, locks are about 150$

The works can be done cheap here in sweden.

So will canfield heads be a great buy?

Will a make any more power with them. (in a 540 i see, but in my 468)

Or should i look at another company? Are there better priced heads out there?

Will these canfield need another head bolt set?

With 660/666 in lift my friends recomends ,100 longer valve steems. Correct?

So anything more i need to know?

I need to order this day or tommorow. Someone with inputs`?

Yes !!! .100 long valve stems will be needed.

I run the same cam in my 540 with 310 Canfields. Seeing your RPM Range is close to mine I would go with the 310's. You can always modify the heads if necessary at a later date if you still feel there is not enough flow to support a future effort. Because you are so light at 2800 pounds you'll be Ok with that cam and 468. I have found that micro-analyzing camshafts prior to running them in your combination is still an educated guess at best and are amazed at how some people compare very minor differences in cam profiles trying to decide between 3 or 4 different cams.

The best thing to do is narrow down the range using good judgement with the basics of your combination.

I am a firm believer that there is no "magic" perfect camshaft anyone can hit right on the nose without true track testing and comparisons.

Anyway I would use the 310's and definetely need the .100 long valves or your valve spring installed heights will likely be too short.

Hope this helps..

What did your 781's have done to them? 1250 is a awesome sell.

hi brillko.watched a couple of your runs in birka cup and it was awesome street racing.you asked about cost effective heads.i just bougt pro topline 360 heads awesome flowfigures but not anything under 500cid.when comparing the flow to my dart pro 1 heads ,the toplines needed 0.100 less lift to achieve the same flow.i,too will be building a540 with 8-71 and twin dominators with 4.625 bore and 4 inch stroke.if i have any money over i will come stockholm next summer to test you guys.

Inga Hoffa-kolvar? ;)

I cant use oval-port heads because i hav a Rect port intake with my EFI.

With a oval the injectors would spray right in the "wall"

So im going for Rect 350cc Canfields because i get them for a good price? 17xx$ non assembled with titanium retainers, manley valves, comp guideplates. Comp Springs.

But the guys at Competition Products wont answer my email ;(

My 781 Heads were pocket ported, 2,19/1,88 stainless valves, Arp studs, Comp 10deg retainers locks, 939 comp springs. Flowing slight more than a 990 rect head and producing 645hp/665ft/lbs@6100/4500rpm. That with 1-7/8 headers 11,2 comp, 800cfm holley.

The guy buying them building a exact copy of my winning recipe. So hes glad ,)

I run Dart Heads but this is on a .030" over 454. They are the Dart 310cc rect. heads. there are alot od guys running dart, but i see very few running canfield when it comes to the 8.90 and 9.90 classes in NHRA.

Went a 9.32 run with my 781 heads ;)

The brodix ones are a little pricy?

Do i need longer Head studs?

Dart468... Soon its 30 april. Then it all starts...

Lots of mid to high 8 sec cars going for the big award this year. ;)

For you guys not living in scandinavia. We competing in a Streetracing Cup that i won last year. This year the competition is getting tough. Just look at Dar468 ,)

On my engine with the Canfield 310's I used the .100 long valves. I would have to look and see what lenth push rods I used. I do rember they were long.
I have not had time to go to dyno yet. I have been happy new engine so far.
John

You will need the head bolt or stud kit for aftermarket heads. The set includes longer bolts/studs for the Canfields and all with raised exhaust ports.

It seems you had already decided on the 350 CC heads before you posted your question, just curious as to the rationale you are using to get the 350 heads instead of the 310's. I am not saying right or wrong, just looking for some explanation.

As for the pushrods, they Will be special length and should only be ordered when you set the geometry on your mocked-up assembly and determine the exact length needed.

inga hoffa-kolvar,dom är alla sålda tillbaks.i will be using ross custom made pistons with 8.25 compression,eagle rods and crank.with the pro topline flownumbers dyno 2003 predicts at 10 psi 1107 hp/7500 rpm and 829lb.ft at 4500.if the combo works i can do a little damage,to whom, that`s another story.and yes i know,the competition is fierce.

bacause the 310cc version is a ovalport?

no canfields are squareport like my pro toplines which give the most flow for the money ,imho.

I've dynoed 540's with 310 Canfields that were ported that made 930 on the motor and 1400 on a single stage of spray.

Originally posted by godsend:
bacause the 310cc version is a ovalport? Nope..Rect Port on the 310's

470 horses with one stage spray!?wonder what my motor would give with my foggers?explode,maybe.it`s only a 400 horse unit but i`m afraid to use it because i know very little about that stuff.

Canfield Aluminum Big Block heads feature 310cc rectangular intake runners, 119cc combustion chambers, 3/8 bronze valve guides and .600" raised exhaust ports. Priced per pair bare.
Price: $1,099.95


Now we talking. ;) that just saved me some money ;)

Take them, add .100 longer valves. New comp 939 springs, retainers, locks, guideplates and ARP rocker studs.

The assembled head is 1399 but then i need to change valves, springs and Stud bolts too get longer for girdles.

I dont know why i thought theyre were ovals ,)

Originally posted by Doug F.:
I've dynoed 540's with 310 Canfields that were ported that made 930 on the motor and 1400 on a single stage of spray. I'm not making anywhere near that much power but I've been really pleased with how my minimally ported 310cc Canfields have performed in my 3,700lb 10.3:1 460 :D

Oh, I almost forgot. Look for some even quicker numbers to be posted in the next 3 weeks ;)

Mine is only running 10.70 not on spray smile.gif that with a 1.75 60.ie.

Converter is too tight so i spray it loose ;)

Be careful with the 939 Comp Springs they recommend. According to Comps Chart they coil bind before reaching the lift and .060" safety factor with the 292R cam you plan on using.

Alright Ken, what's up your sleeve????.

I am drooling as to the first week in April when my track opens with $5 race days for the first few times.

Im not 100% on the 939 one. Someone has another better one.

Ran that one for 2 years on this cam.


Here im breaking my rear end ;)

http://forum.lazzat.se/attachment.php?s=daaafe70260966f1346ba6a55f838b6f&postid=143627

Originally posted by mc71454:
Be careful with the 939 Comp Springs they recommend. According to Comps Chart they coil bind before reaching the lift and .060" safety factor with the 292R cam you plan on using.

Alright Ken, what's up your sleeve????.

I am drooling as to the first week in April when my track opens with $5 race days for the first few times. I'm running the 953-16 springs on mine. Coil bind is nearly .200 lower than the 939. Springs should last longer too since they're not running on the ragged edge.

Tom, nothing up my sleeve really. Had Wilson build me a custom spacer based upon some data I've collected, making a minor modification to the divider on my RPM plenum and adding merge collectors. Also installing beefier rear shoes/quick release springs to allow me to footbrake the car more without pulling through the lights. Hoping for at least .1 from these changes, assuming the suspension can handle the added torque from the mods and higher launch RPM. The two occassions when I've tried to launch on the trans brake it just destroys the tires :D

Originally posted by godsend:
Im not 100% on the 939 one. Someone has another better one.

Ran that one for 2 years on this cam.


Here im breaking my rear end ;)

http://forum.lazzat.se/attachment.php?s=daaafe70260966f1346ba6a55f838b6f&postid=143627 You are lucky that the installed height was 1.950" or better or Comps chart is wrong.

I used 050 locks to get a higher installed height.

So should i go with assembled 310cc and change springs, use 050/050 locks/retainers? Or buy bare and use .100 stem?

Yeah, I did that too with the valves that came with mine. I didn't like how close the locks came to being flush with the valve stem. I was Very careful to make sure the roller tip was right in the middle.

Buy them bare, buy .100 long valves, and install CP's Congo Roller Springs at 1.950". Those springs I have 3 seasons on and will be replacing them with another set just for maintenance. It will give you 200 +/- on the seat and enough spring rate to gaurd against valve float if you accidentally over rev it. They have a spring rate about 50 pounds greater than the 939's. With a solid roller I feel better about the added spring rate which really isn't considered that high in regards to solid rollers.

Is VTO 10deg a great retainer. Cant find steel from comp/crane on their site.

Tiatnium is overkill? Their clamier Titaniums for 68.95$ or cranes for 99.95$

What valve size should i run?

2.30, 2,25 2,19 and exhaust, what will fit? 1,88 for sure?

2.25/1.88 is all you should need.

Tom

And today i got them ;) ;) ;) ;)

graemlins/hurray.gif graemlins/thumbsup.gif

graemlins/thumbsup.gif

Toss some pics at us!

Rod