Re: head swap to B1 BS HP gain?
[Re: HardcoreB]
#574121
01/09/10 01:03 PM
01/09/10 01:03 PM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
Also IMO there is no magic/phenomenon about these heads.
X2. Very true, they are what they are. Nothing wrong with them, but nothing spectacular either.
I bought my heads 9 years ago, got both of them, with studs, rockers, etc NIB for 900 or so....and they still have only 45 mins or so run time on them. No fault of the heads though.
If I was in the market for a set, they would be at the bottom of my list, right above standard Stage VIs. Biggest drawback to me is the exhaust port height. To me you have a "street" head with a raised exhaust port. Header fitment with a RB is a frickin mess. A CNC'ed Eddy will flow almost as much, without the header fitment issues.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: head swap to B1 BS HP gain?
[Re: pittsburghracer]
#574122
01/09/10 01:04 PM
01/09/10 01:04 PM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
These heads have to be opened up to max wedge size to make good numbers.
Any flow numbers to back that statement up?
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: head swap to B1 BS HP gain?
[Re: ProSport]
#574124
01/09/10 01:46 PM
01/09/10 01:46 PM
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Joined: Jan 2003
Posts: 4,101 Shelby Twp. Mi
HardcoreB
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Shelby Twp. Mi
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unless the B1BS heads are pooling oil right along the VC rail.
Yessir, that is the problem area...nothing a bridgeport operater or amature machinist cannot fix. The drainback pathways are cast too horizontal. Especially between the valvecover rail and the spring pockets. Or you could roll the car side-2-side, then raise the front end before you remove the valvecovers.
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Re: head swap to B1 BS HP gain?
[Re: Cab_Burge]
#574125
01/09/10 02:33 PM
01/09/10 02:33 PM
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Joined: Oct 2004
Posts: 8,165 Left Coast
BobR
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Left Coast
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I did a swap from a set ported 906 heads with 2.14 and 1.81 valves to a set of CNC ported Eddy RPMs and gained 2/10 and 4 MPH I beleive the stock out of the box B1-BS are better than the stock Eddy RPM as far as flow, my stock OOTB Eddy RPMs outflowed the ported big valve 906 heads
On a 452 motor I went from a fully ported 906 to an OOTB(port matching only) BS head and went from mid 10's/128 to a best of 9.76/136. The small CC of the BS head upped my CR significantly(probably 2 full points) besides the better flow of the head itself. I also went from 1.5 to 1.6 rockers on the change.
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Re: head swap to B1 BS HP gain?
[Re: montessa]
#574128
01/09/10 04:52 PM
01/09/10 04:52 PM
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Joined: Jan 2003
Posts: 4,101 Shelby Twp. Mi
HardcoreB
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Quote:
I had the same issues with oil all over the place when removing the valve covers, a real pleasure when adjusting valves! Also, what a treat changing spark plugs. The easiest way I found was to plan on dropping the headers every time!
Or just whip-up a custom set of headers. Also, I ground a channel around the valvecover rail AND added a small drain port intersecting the botton of edge of the valvespring seat. The fitting can be seen in the pic just below the valvecover hold-down stud.
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Re: head swap to B1 BS HP gain?
[Re: blownzoom440]
#574131
01/09/10 07:25 PM
01/09/10 07:25 PM
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Joined: Dec 2004
Posts: 140 sweden
street_dart
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sweden
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B1 BS ported to MW. indy intake. 500" 4.375" low deck. 13.7comp. 725/715" 276/286@050 rollercam 766Lbs@5100rpm841Hp@6400Rpmeddy rpm ported standard port. team g. 500" low deck. 11.4comp. 590mopar cam. 649Hp@5900RpmSame 1050 (9375)holley and same low deck.
Dodge Dart-67
Dodge Custom Royal Lancer-55
Dodge Dakota 4.7 -05
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Re: head swap to B1 BS HP gain?
[Re: HardcoreB]
#574132
01/09/10 07:45 PM
01/09/10 07:45 PM
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Joined: Jul 2005
Posts: 8,647 ELYRIA,OH
blownzoom440
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ELYRIA,OH
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ported or just cleanedup what did you gain in HP,ET or MPH.you can list your combo if you like but i am just lookinfg for results. Thanks for any info.
As stated already the chambers are small. Can I assume that you will have to open the chambers to acheive your desired C/R? Off the top of my head the chambers have a good amount of "unnecessary" material. Which will cater to your advantage for flow increase. I want to say you can acheive 76+cc in an unmilled head while only sacrificing C/R.$$$
scott said today thay can be opened to 80cc and i was very worried about the cr as i did not want to change pistons.the block needs decked yet but the pistons should be .040 in the hole with 2.060 ch piston,3.75 stroke.6.76 rod,.043 gasket,80cc heads.4.350 bore.just over 9/1cr i think.let me go do the math.
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Re: head swap to B1 BS HP gain?
[Re: blownzoom440]
#574133
01/10/10 03:21 AM
01/10/10 03:21 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Aurora, Colorado
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When I bought my B1 B/S heads back in the early 1990's there was not many choices for aluminum heads. There was the Indy 440-1, the Mopar Stage VI, original B1, B1 B/S, and Stage V hemi conversion head. Indy came out with the S/R several years later after they filled the ports of a 440-1 for some engine shootout in either CarCraft or HotRod? Several years after that Edelbrock produced the performer head.
I ordered my heads from Koffels with their stage 1 porting, rocker arms, pushrods, and sparkplugs. With shipping I think it was right at $3,000.
A few years ago, I broke the intake valve head off the #4 cylinder. This may have been my fault as I neglected to change the valve springs. Anyhow, I was going to send the heads out for repair and do the max wedge cnc porting, but I decided to try out the new Edelbrock Victor heads. I know this is not the for sale section, but if anyone is interested in my old B1 B/S heads for $1,000 PM me.
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Re: head swap to B1 BS HP gain?
[Re: street_dart]
#574135
01/10/10 02:55 PM
01/10/10 02:55 PM
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Joined: Feb 2004
Posts: 3,441 Mo.
supercomp
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Quote:
B1 BS ported to MW. indy intake. 500" 4.375" low deck. 13.7comp. 725/715" 276/286@050 rollercam
[Email]766Lbs@5100rpm[/Email] [Email]841Hp@6400Rpm[/Email]
eddy rpm ported standard port. team g. 500" low deck. 11.4comp. 590mopar cam.
[Email]649Hp@5900Rpm[/Email]
Same 1050 (9375)holley and same low deck.
Did you get those from Tom (RT540)?
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Re: head swap to B1 BS HP gain?
[Re: supercomp]
#574136
01/10/10 03:27 PM
01/10/10 03:27 PM
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Joined: Dec 2004
Posts: 140 sweden
street_dart
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Joined: Dec 2004
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sweden
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Yes I bought them from Tom (RT540). I mill them .040" to get 13.7 comp with my flat topp pistons @ the deck and .039 gaskets. The heads are ported by the swedish legend Grottis in the -90īs.
Nice heads works great!
Dodge Dart-67
Dodge Custom Royal Lancer-55
Dodge Dakota 4.7 -05
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Re: head swap to B1 BS HP gain?
[Re: 451Mopar]
#574137
01/10/10 03:53 PM
01/10/10 03:53 PM
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Joined: Jan 2003
Posts: 4,101 Shelby Twp. Mi
HardcoreB
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Quote:
A few years ago, I broke the intake valve head off the #4 cylinder. This may have been my fault as I neglected to change the valve springs.
I just rebuilt a pair with new 'take-off's' early 90's era valves, rockers, springs, locks and retainers. I'll have to look at actual values but the springs were RUINED after a SHORT season of use. We had 2 track visits and only a few street cruises. I set them up .050" from coil-bind based on measured net lift...Used the Comp 308/.625/108 and Standard BS rockers. Seat pressure dropped from like 230 to 180. I couldn't beleive it. There recycled scrap by now.LOL
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Re: head swap to B1 BS HP gain?
[Re: HardcoreB]
#574139
01/10/10 04:39 PM
01/10/10 04:39 PM
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Joined: Feb 2004
Posts: 3,441 Mo.
supercomp
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Quote:
Quote:
A few years ago, I broke the intake valve head off the #4 cylinder. This may have been my fault as I neglected to change the valve springs.
I just rebuilt a pair with new 'take-off's' early 90's era valves, rockers, springs, locks and retainers. I'll have to look at actual values but the springs were RUINED after a SHORT season of use. We had 2 track visits and only a few street cruises. I set them up .050" from coil-bind based on measured net lift...Used the Comp 308/.625/108 and Standard BS rockers. Seat pressure dropped from like 230 to 180. I couldn't beleive it. There recycled scrap by now.LOL
I replaced them and the valves (made in England) on the advice of one of the famous hemi ss/ah engine builders with comp springs and farrea valves. Also replaced the rockers with t&d's after breaking two the first year.
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Re: head swap to B1 BS HP gain?
[Re: blownzoom440]
#574140
01/10/10 05:35 PM
01/10/10 05:35 PM
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Joined: Jan 2003
Posts: 4,101 Shelby Twp. Mi
HardcoreB
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Quote:
i have harland sharp that will work but i need to change the intake rocker to the correct offset and HS sells those.sorry you had problems with the springs,valves...
I don't believe the valves used are 'bad' or not capable but, I would not reuse any valves that were subject to those conditions, severe floating resulting in the breaking of one. The set I replaced had severely worn stems and showed signs of floating on the seats. I replied because he said he'd believed the cause was worn valvesprings and I was just stating the well-documented facts of my experience.
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