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Old 05-31-2008, 04:08 AM
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Which heads for my 406?

I have a 406 small block chev in a 1967 HR Holden. (Australian) It currently has Dart 2 sportsman heads, a Weiand Stealth manifold and a 750 holley. My cam is a Lunati VooDoo 60105. Im looking at changing to some Trick Flow 195 cyl heads but all I can get my hands on right now is Edelbrock Victor Jnr 215s. Are these heads going to be too big for a street engine with this small hydraulic cam? I have a 3000 stall, 3.25/1 gears and my car weighs 3000 Lbs.

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Old 05-31-2008, 07:13 AM
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ON a 400? Not a chance.
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Old 05-31-2008, 10:06 AM
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Quote:
Edelbrock Victor Jnr 215s. Are these heads going to be too big for a street engine with this small hydraulic cam?
X2 V-V-V
Quote:
ON a 400? Not a chance
I think you'll find those 215's to work better than you ever thought. IMHO
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Old 05-31-2008, 04:35 PM
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Holdon

I hope so! I dont want to get caught in that 'bigger is better' state of mind. Really want to retain some good low down power to keep the car fun to drive. I have a virtual engine dyno program on my computer and with the 215 cyl heads programmed in it shows some pretty impressive figures, hope they are accurate
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Old 05-31-2008, 04:49 PM
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You may want to investigate Airflow Reasearch 195s . These perform as well or better than other 200 - 215 heads.
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Old 05-31-2008, 05:36 PM
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Holdon

Ive been doing a bit of research and it seems that Trick Flow 195s and AFR 195s a very similar in performance. There is none in here in New Zealand currently though with 72cc combustion chambers. All I can get my hands on is the Victor Junior 215s but am worried I might lose lots of low down grunt and throttle response. The 400ci small blocks are way under valved is my understanding, so maybe the Victor jnrs are ok? Not sure just yet.
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Old 05-31-2008, 11:45 PM
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What happened to the ProTopline company that is or was in Wiri Auckland NewZealand? I've got a set of there Pro Aluminum Lightning Heads 220cc Intake runner, 64cc Chambers 2.02In-1.60Ex. on my SBC406.
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Old 06-01-2008, 07:05 AM
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Quote:
Ive been doing a bit of research...
...AFR 195s a very similar in performance. There is none in here in New Zealand currently though with 72cc combustion chambers. All I can get my hands on is the Victor Junior 215s but am worried I might lose lots of low down grunt and throttle response.
Dude, use the Vic Jrs. You won't be disappointed. The AFR would be the killer choice, but I've even run old Iron Eagle 215's on 400's in the past and you aren't gonna miss anything downstairs. What use will this motor see? I'm assuming with that cam it's a street type set-up. Daily driver??? Do it!
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Old 06-01-2008, 07:01 PM
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Holdon

Quote:
Originally Posted by Stroke
Dude, use the Vic Jrs. You won't be disappointed. The AFR would be the killer choice, but I've even run old Iron Eagle 215's on 400's in the past and you aren't gonna miss anything downstairs. What use will this motor see? I'm assuming with that cam it's a street type set-up. Daily driver??? Do it!
It will be a weekend fun car. I havent had it down the strip yet, but it would be rude not to wouldnt it! Will also see a bit of highway use to hotrod events etc. From the replies I'm getting it sounds like either AFRs, TrickFlows or Victor jnrs are all going to return awesome figures
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Old 06-01-2008, 07:08 PM
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Quote:
Originally Posted by SSedan64
What happened to the ProTopline company that is or was in Wiri Auckland NewZealand? I've got a set of there Pro Aluminum Lightning Heads 220cc Intake runner, 64cc Chambers 2.02In-1.60Ex. on my SBC406.
Umm not sure mate, cant say Ive heard much about them to tell the truth. What did their heads perform like for you?
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Old 06-01-2008, 09:16 PM
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Topline went out of business, Topline was bought out by CompCams, they
now sell the heads under the name RHS. The Toowoomba a foundry in
Australia casts heads for Engine Quest and RHS. These are good heads,
they do need porting to perform well.

The Edelbrock Victor Jr.s do not compare to the AFR heads.

http://www.tmettec.com.au/iron.htm
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Old 06-02-2008, 11:40 PM
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ProTopline

I thought thats who sells them now RHS. Competition Products still has the ProToplines too. I've noticed Comp has been buying up a lot of good companies/competition.
I bought the ProToplines several years back on Ebay for $500 bare heads. Still have the paper work, says 257 Roscommon Road, Wiri Auckland - NewZealand. Website doesn't work anymore though.
I cleaned up around the valve guides in the bowls and port matched them. Have had good results so far.

SBC406-10.46Cr, ProTop 64ccChmbr 220Itk 2.02I-1.6E, 254I-254E-600"Lift I&E HydRoller, 780 Holley, 1-3/4"Headers, 3" Duals, Victor Jr, Wiseco forgded reversdome pistons,Scat9000Crank,Scat4340 7/16 capscrews 6"Rods, Holley Strip Ignition, 12Bolt Posi 3.73, Th2004R, 64Chevelle=10.98 @122
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Old 06-03-2008, 12:48 AM
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Holdon

After looking at several different websites and discussions, Ive decided to run with the AFR 195cc heads. They have better flow rates up to .500" lift than anything else around, should make for a good responsive engine with lots of torque and power. Was surprised that the Head specialist that sells them also recommended I get rid of the Weiand Stealth manifold and replace it with a Victor Jnr. Doesnt think the weiand flows enough!
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Old 06-04-2008, 12:45 PM
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Quote:
The Edelbrock Victor Jr.s do not compare to the AFR heads
No duh. But Holdon said
Quote:
"all I can get my hands on right now is Edelbrock Victor Jnr 215s"
Quote:
seems that Trick Flow 195s and AFR 195s a very similar in performance
Hands down with the AFRs.

Exactly what is this engine going to be doing for duty? Where is it going to spend 90% of it's life?

I've run the Stealth manifold on 10:1 406's and other sbc street motors and they worked excellent. Never though to change from a Stealth ever. I would buy another in a minute for street duty. Same with the RPM Air-Gap and PP Crosswind.

Last edited by Stroke; 06-04-2008 at 12:50 PM.
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Old 06-05-2008, 12:05 AM
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Holdon

Will spend most of it's life on the street, although we have got a brand new 1/4 mile strip in town so will get into running it there for some fun also. I took the advise of an old school hot rodder mate and made my custom headers out of 1 5/8" tube, they go into a 2" tri-y set up and then into 2 1/2" twins. They are real tight but am thinking I shouldve tried to squeeze 1 3/4" headers in there instead. 90% of the dyno reports I have seen with 406ci chevs are running 1 3/4 headers.
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