Cylinder Head Battle !
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Cylinder Head Battle !
A Cylinder head battle has recently occured on a mild street/strip bracket motor..... whats your prediction on the power of each? Here is the set-up and the 3 participants.
395 sbc
4.04" bore x 3.85" stroke
Weiand Team G intake
Hyd roller cam .544/.554 w 1.6's - 230/236 @ .050" - 112 lsa
approx 10-1 cr
1 3/4" headers
The Competitors:
1) Camel Back heads with a competition port job done by Mike Stark of CFM performance. 2.02/1.60 - 62 cc chamber
2) Off the shelf Dart Pro-1 Platinum 200cc aluminum cylinder heads - 65 cc - ($ 1460 cost)
3) Off the shelf AFR 195 Eliminator aluminum cylinder heads (street port, not the competition) - 65 cc - ($ 1485 cost)
Who wins ? How much HP of each ?
395 sbc
4.04" bore x 3.85" stroke
Weiand Team G intake
Hyd roller cam .544/.554 w 1.6's - 230/236 @ .050" - 112 lsa
approx 10-1 cr
1 3/4" headers
The Competitors:
1) Camel Back heads with a competition port job done by Mike Stark of CFM performance. 2.02/1.60 - 62 cc chamber
2) Off the shelf Dart Pro-1 Platinum 200cc aluminum cylinder heads - 65 cc - ($ 1460 cost)
3) Off the shelf AFR 195 Eliminator aluminum cylinder heads (street port, not the competition) - 65 cc - ($ 1485 cost)
Who wins ? How much HP of each ?
Yes, I have the dyno graph. It is interesting.
Yes, CR was the same.... actually a hair higher with the camel backs due to 62 cc chamber..... other two were 65 cc.
No other changes were done to the motors, same dyno, same day.... each set was tuned for optimum power (timing/jetting)
All dyno results were corrected for fairness.
Yes, CR was the same.... actually a hair higher with the camel backs due to 62 cc chamber..... other two were 65 cc.
No other changes were done to the motors, same dyno, same day.... each set was tuned for optimum power (timing/jetting)
All dyno results were corrected for fairness.
The guy who did this test has no connection or particular love for any of the cylinder heads, he was just trying to figure out which one would work best on his motor and the dyno operator was described by him as "Swiss" as in neutral.
He's pretty much a no-nonsense racer who is a straight shooter....
He's pretty much a no-nonsense racer who is a straight shooter....
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Are you going to post the results ? I would like to see this as well.tod85 wrote:Yes, I have the dyno graph. It is interesting.
Yes, CR was the same.... actually a hair higher with the camel backs due to 62 cc chamber..... other two were 65 cc.
No other changes were done to the motors, same dyno, same day.... each set was tuned for optimum power (timing/jetting)
All dyno results were corrected for fairness.
Ron Miller
Re: Cylinder Head Battle !
1) Camelback = 505HPtod85 wrote:A Cylinder head battle has recently occured on a mild street/strip bracket motor..... whats your prediction on the power of each? Here is the set-up and the 3 participants.
395 sbc
4.04" bore x 3.85" stroke
Weiand Team G intake
Hyd roller cam .544/.554 w 1.6's - 230/236 @ .050" - 112 lsa
approx 10-1 cr
1 3/4" headers
The Competitors:
1) Camel Back heads with a competition port job done by Mike Stark of CFM performance. 2.02/1.60 - 62 cc chamber
2) Off the shelf Dart Pro-1 Platinum 200cc aluminum cylinder heads - 65 cc - ($ 1460 cost)
3) Off the shelf AFR 195 Eliminator aluminum cylinder heads (street port, not the competition) - 65 cc - ($ 1485 cost)
Who wins ? How much HP of each ?
2) Dart pro's = 500HP
3) AFR Elimin. = 530HP
Just a guess, as the info provided is slim pickin's...
There, now post the results....pleeeeeeeze
Brian
Last edited by ou812 on Sun Dec 28, 2008 2:17 am, edited 1 time in total.
The below color codes are:
Green: Baseline with camel back cylinder heads and a very, very old solid flat tappet grind back from the 60's or 70's (230/230 area) (Goes to show you how far they've come in cam technology and how these new grinds really help make some power)
The Camel Backs had previously received a competition port job by Mike Stark @ CFM performance and had 2.02/1.60 valves.
Grey: Camel back heads 62 cc chamber- with Hyd roller cam 230/236
Blue: Dart Pro-1 Platinum 200 cc aluminum cylinder heads 65 cc chamber(Cost $ 1460)
Pink: AFR 195 "street" port aluminum cylinder heads 65 cc chamber (Cost $ 1485) (These are not the competition ported AFR cylinder heads)
Conclusion: Considering those old Camel Backs are decades old, they held their own against the Dart Pro-1 Platinums (Good job Mr. Stark and CFM performance)
The AFR's did very well...... and its reported that the competition eliminators would have made another 30 HP on top of the 490ish they show here.
Green: Baseline with camel back cylinder heads and a very, very old solid flat tappet grind back from the 60's or 70's (230/230 area) (Goes to show you how far they've come in cam technology and how these new grinds really help make some power)
The Camel Backs had previously received a competition port job by Mike Stark @ CFM performance and had 2.02/1.60 valves.
Grey: Camel back heads 62 cc chamber- with Hyd roller cam 230/236
Blue: Dart Pro-1 Platinum 200 cc aluminum cylinder heads 65 cc chamber(Cost $ 1460)
Pink: AFR 195 "street" port aluminum cylinder heads 65 cc chamber (Cost $ 1485) (These are not the competition ported AFR cylinder heads)
Conclusion: Considering those old Camel Backs are decades old, they held their own against the Dart Pro-1 Platinums (Good job Mr. Stark and CFM performance)
The AFR's did very well...... and its reported that the competition eliminators would have made another 30 HP on top of the 490ish they show here.
Interesting input.....B20Paul wrote:That's not really a fair comparison. All else being equal, iron heads are going to make more power at the same compression.
You must be referring to the camelbacks because the Darts & AFR's are both aluminum.
But, should I recast the camel back for you ? Not sure how to solve your problem with them....
I understand what you are saying Paul about the iron vs aluminum..... but I will add, that the differences you are talking about usually amount in the area of 5 hp on a street motor like this one. Others on this forum could certainly give better input than I can considering we have a handful of engine builders here, but from the tests I have seen between aluminum and iron and everything else apples vs apples, the differences, if any at all, are minor.
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