[al37ford]

There seems to be a price war in my area on Edelbrock alum heads. I can buy Victor Jr 23degree cheaper than Performer RPM and just wondering if the Jr's would be ok for a primarily street 350 9 1/2 to 1 comp. 224/[email protected] Summit cam Weiand Stealth mani & 600 cfm Holley Petronic ignition, balanced etc. with 2500 stall converter. Also what does the 23 degree refer to? Valve angle? Plug angle?

 

[firestone]

I would consider buying a set of CNC ported AFR 195cc heads, they are $1300 a set assembeled with the porting which is not very much more than the edelbrocks especially when you consider the fact that the AFR's will perform much better. Also, I think that the Victor Jr heads would be too large for your combonation. They have a 215cc runner which is pretty big.

Adam

 

[camaroman7d]

While I agree the Vic. Jr. heads are too big for a low compression 350 street engine. I am not a big fan of AFR's, Take a look at a set of Trick Flow heads they will actually out flow AFR's when ported correctly. I also like Canfields and Darts. If you match the head size to your needs/goals you really can't go wrong with either of the heads mentioned. You can get all of the other heads for cheaper than the AFR's as well. Don't get me wrong the AFR heads are good, they are just not as good as many people have been mis-led to believe. They are not head and shoulders above the rest, they outflow most "as cast" heads but, that's because they come ported.

 

[firestone]

He is right if you want to buy a set of darts or trick flows and have them ported, they will flow like AFR's or better if you compare them to the street CNC ported AFR heads, but you will have $1200 in the heads and $1500 in a professional port and polish. A set of steet CNC ported AFR's are only $1300 a set. AFR also offers a "competition package" CNC porting. With that porting, the heads are $2000 a set. I have a set of 230cc runner Brodix 11-X heads that were professionally ported and plolished by High Velocity Heads. The heads were $1300 a set, and $1500 was spent on the port job. I compared the flow numbers to a set of AFR 227cc Comp package CNC ported heads flowed under the same conditions, and the AFR's over all flowed the same as my brodix heads. AFR's were $700 less after the porting on the Brodixes.

Adam

 

[1BAD80]

Get a set of Dart Pro 1 230 heads they will flow without the extra workthey go for $1200. and will do the job.
Any good head will have angle plugs for better flame travel and easier to remove the plugs. Why port them if you get the larger size. When the motor grows up then you can port the heads to that motor.

 

[firestone]

I think 230s are way too big, and for $100 more you can have a fully CNC ported head, why not go with it?

Adam

 

[1BAD80]

They will only flow as much as the cam lets them.
What flow do you think they will be after porting & CNC work on the 195s then. For the money I was recommending the 230s for future buildup.
Can always get the smaller valves.
Your probably rite Ben as this is a small motor, and not knowing all the combination its just a guessing game.
Plus the stall is kinda high.

 

[firestone]

Here are the flow numbers for the AFR street CNC ported heads from the AFR website and the Dart 200cc iron eagle heads which flow the same as the Pro 1 200cc heads from the Chevy high performance cylinder head flow bench database. This is the difference you can expect from CNC porting. The cam in the 350 will have .500 or less lift for that duration, so those are the numbers that should be compared.

AFR 195 intake
.200-132
.300-198
.400-240
.500-260
.600-268

AFR 195 exhaust
.200-108
.300-156
.400-178
.500-190
.600-194

Dart 200cc head intake
.200-122
.300-174
.400-212
.500-234
.600-236

Dart 200cc head exhaust
.200-105
.300-126
.400-164
.500-174
.600-175

Also, check out a couple of engine combos. One has dart pro 1's and the other has AFR 190s both motors are 383's and both have hydraulic roller cams but the AFR combo has a little smaller cam and less compression. Compare combo 17 and combo 43 on the website below.

http://www.ryanscarpage.50megs.com/combos3.html

Ada,

 

[al37ford]

So, back to my original ask, I'lm thinking most are saying Performer RPM over Victor Jr.?? The others mentioned here aren't in this price war where I am as the 2 are down below $1k. The reply about the cam allowing flow makes sense also so if the Victors are cheaper am I hurting performanve with them by having too big heads? I can easily move up in cams as well.

 

[1BAD80]

It is not just the cam, don't forget the carb is only 600 cfm.
If you need info, its best to put down what car, weight, gearing and such.
The complete combination is needed to give the correct info.
I prefer a Holly Contender or Wieland Stealth.
How much do you plan on spending for the whole motor ?
Maybe a GM 383 crate motor would be better with a warranty.
The stall speed is determined by the cam specs along with the rest of the car, 2500 is kinda high for your setup unless its a tank.
Rule of thumb is 300 rpm on the cam before the stall, the motor needs some rpm before loading it up.
LOL

 

[firestone]

I do agree that between the Victor jr's and the RPM's that RPM's would be better for your combonation. The only way I would recommend the victor jr's is if you were running at least a 406 or if your powerband was between 3500-7500 RPM in a 350.

Adam

 

[87 monte ss]

if its a street car why not get some good cast iron heads cheaper

 

[killerformula]

always buy the best head you can afford. Heads are an investment, you can use them forever on different motors.

K

 

[killerformula]

Here are the flow numbers for the AFR street CNC ported heads from the AFR website and the Dart 200cc iron eagle heads which flow the same as the Pro 1 200cc heads from the Chevy high performance cylinder head flow bench database. This is the difference you can expect from CNC porting. The cam in the 350 will have .500 or less lift for that duration, so those are the numbers that should be compared.

AFR 195 intake
.200-132
.300-198
.400-240
.500-260
.600-268

AFR 195 exhaust
.200-108
.300-156
.400-178
.500-190
.600-194

Dart 200cc head intake
.200-122
.300-174
.400-212
.500-234
.600-236

Dart 200cc head exhaust
.200-105
.300-126
.400-164
.500-174
.600-175

Also, check out a couple of engine combos. One has dart pro 1's and the other has AFR 190s both motors are 383's and both have hydraulic roller cams but the AFR combo has a little smaller cam and less compression. Compare combo 17 and combo 43 on the website below.

http://www.ryanscarpage.50megs.com/combos3.html

Ada,

Those dart flow numbers are incorrect.

K

 

[firestone]

Do you have an acccurate set of flow numbers for the 200cc heads? I got those numbers from the chevy hi performance flow bench database. Although you you sometimes cant trust everything the magazines say, I compared the CHP flow numbers for the AFR 210 heads to the numbers that AFR claims for their 210 heads (which have been proven accurate), and they were very close to eachother. I assumed due to this that the CHP tests were pretty accurate. Since all the heads are tested on the same flow bench, and all the variables are the same I thought the Dart numbers would be pretty close also. But again, if you have better information, I would be interested in seeing it.

Adam

I did some more research, and found some other tests of the dart 200cc heads, and it seems that the CHP numbers are low on the top end of the lift range. There are a couple of sites below that have numbers for those heads that show what may be more accurate results. I think these would be better numbers to compare to the AFR 195's Thank you for pointing that out about the Dart heads.

Adam

http://www.racenet.net/valve/dart-sb-iron-eagle.php

http://www.airflowresearch.com/performance/chp_test.htm