View Full Version : Annyone running B1-BS heads?

09-01-2002, 12:27 AM
Anyone running B1-BS heads?, If you are what is yor race weight?, What lift cam are you running ? and what is your average E. T.?
thanks Keith

Lee Pritchard
09-07-2002, 12:21 PM
I ran a set of b1 bs heads on my 63 ... 3600 pounds 440 60 over 11.1 pistons ...625 crane roller M1 intake 935 holley ....69 J convertor , 456 gears ..... best et was 10.38 .......if you use b1 bs heads you have to put a full grove in number 3 cam bearing or you will burn up the push rod tips from lack of oil.....Lee....

09-09-2002, 08:18 PM
I have the B1 B/S heads on my 451 stroker engine.
This is a street/strip engine in a street car so it dosen't ET really well.
The Engine has about 11:1 compression (I think it is a bit lesss because my head gaskets are thicker than the recommended Fel-Pro 1008?) The cam is a Ultradyne street roller 284R, duration at 0.050" is 251/251. I'm running 1.6:1 rocker arms for approximatly 0.613" valve lift. Intake is a M1 single plane with a 1,000 cfm pro-series carb. Exhaust is hooker 2" super-comp headers with 3" TTI exhaust with dynomax superturbo mufflers.
Corrected rear wheel HP on a Dyno Jet dyno was 455.29 HP @ 6,100 RPM, and 475.14 ft/lbs of torque @ 3,800 RPM.
The car is really consistent. Friday I ran 12.651, 12.651, 12.615, and 12.653 ETs at Bandimere (In Denver Colorado) the cars weight was 4,150 pounds running M/T Street ET tires, and launching at a low 1,200 to 1,400 RPM (launching harder smokes the tires.)

09-10-2002, 02:11 AM
Cool! Another thread about B1-BS heads!

If your thinking anout getting them,do it! My set up is simular to 451's. If I can get it to hook I'm sure it'll run mid-ish 11s. My best ET is 12.4 and mph is 115. w/1.874 60 ft(have to launch off idle)

They are an excellent head but you will have to fab up some headers for them. The exhaust is raised and the plugs are raised and relocated.

The head has very good potential flow at 350 to 365 CFM fully ported. They have offset intake rockers like the old Stage IV heads and INDY 440-1.

A guy I know is running them with a .590 solid and goes 10.90s.He's got 12 to 1 comp. and has to use a 29 x 11 inch slick to hook in a 3500 lb Challenger. This is with un-ported heads. He has since had them fully ported but no times yet as now his car wont hook again! ;)

09-10-2002, 03:18 AM
I forgot to add my car is a 1971 Charger with 3.91:1 gears and a 10" Dynamic converter.
The engine could use more cam too. I am still running my power brakes without a vacuum resivor.
My best ET here in Colorado was a 12.4 at just over 110 MPH.
My MPH are usually over 108+ to 110+ MPH, but being a stock type suspension street car it dosen't get great traction.
I think at a lower altitude track the car would easely be in the 11's, but traction (and lack of a roll bar and sub-frame connectors) could be a problem.
Also, this is a pump gas engine. I run the junk 91 octane gas from the local loaf-n-jug. When I go to the track I usually add 5 gallons of 110 octane race gas to 15 gallons of pump gas just to be safe.

If your building a strip engine, the small 65cc chamber of the B1 B/S heads will make an easy 13:1 compression 440 or 451 cid engine using flat top pistons. I think the stock valve springs can handle 0.675" lift roller cams? I would use a roller cam larger than 260 @ 0.050" in a strip engine, along with a smaller converter, more gear, and alot lighter vehicle that has the suspension setup for the drag strip.
I think Koffels sells a B1 Bomber crate engine using the B1 B/S heads. I think it is either a 451 cid or 470 cid engine and makes over 670 HP with a single 4-bbl carb on (I think) the M1 single plane intake. I have heard of some B1 B/S headed engines making 780+ HP with ported heads, but I can not verify if that is true, or the guy was BS(ing) me ;)

09-10-2002, 03:39 AM
Koffel's was advertizing that Bomber B1-BS at 750 hp in the ad I saw a year or two ago.

09-10-2002, 04:24 AM
A good Friends, 68 Charger, 3900lbs, Best et 10.28@134,
usely runs 10.50 range, 440 .30 over,12.5 compression, roller, 680 lift Dur ?Heads were ported, still some more to play with i think.
runs hard, I like the small combustion chamber 63cc i think. You will have header issues, I think. He runs hooker s-comps we ajusted 2 tubes.
good luck Jim

09-10-2002, 05:01 AM
Yup, #3 and #6. Right?

Scott Koffel told me alot a guys start with the Super Comps and then modify them to fit. I had already bought some Comps and no way were they gonna fit! I ended up using a set of CPPAs that still needed ALOT of work but they were in the ball park as far as clearing the chassis, steering, etc. Most of the reconfiguring was in pulling the pri. out away and angled from the flange.(to clear plugs)

09-10-2002, 02:44 PM
I used the Hooker 2" super comp headers and they fit fairly good.
On the engine stand they fit fine with no problems, but I needed to ding a few tubes to get to the spark plugs when the engine was installed in the car.

09-11-2002, 01:48 AM
One more thing on the header issue. If you use RB headers(Hooker Part # 5209) on the B low-block you will get a better fit. It will compensate somewhat for the approx 1 inch raised port. RB guys like myself might want to look into a custom set.

09-19-2002, 10:20 AM
Hello !!
My heads have added material on the floor of the intake runners
and max. porting. Intake flow 350CFM at 28" with 250 cc volym.
This is on my homebuilt flowbench.
Intake lift is 0.700"
The car SC weights 2800 pounds ( soon 2700)

Best et so faar 8.908 with 1.24 60 feet.
( I have only run 3 events)
Former owner/ builder of this engine has run 8.10 in an old pro
stock chassie with a man. liberty.

Engine displ. is 4.50" bore and 4.25" stroke.

09-19-2002, 12:17 PM
Welcome to Moparchat, Tom! Those numbers are consistant with other full ported B1-BS I've seen.(From Muscle Motors, Koffel's and others) Thanks for posting, I've wondered how the heads would work on a bigger ci motor--they seem to work just fine!;)

That car of yours is flying! Is that in a Dart or other light Mopar? Whats the rest of the combo? Anyway, continued good luck with it!

09-19-2002, 01:33 PM
What intake manifold works with max ported heads?
Do you need to get an Indy intake for the larger ported heads?

09-20-2002, 02:56 PM
Not sure if he meant "max" or "full" ported. The fella I mentioned before had his opened up to Max Wedge size.i.e., like INDY 440-1. So he is using the INDY 4500 intake. BTW, he also went to a 2.25" intake valve and the heads flow 365 CFM. Koffel's did the work. He told me World Products who does the casting for INDY, has an INDY intake with the B1 Logo, but they did'nt have any in stock,so he had to get one with INDY logo. I think he said he ground it off, tho. I actually emailed WP about this, but never recieved a reply.

09-20-2002, 03:29 PM
The car is a Coronet R/T 69 with strut front and rack steering.
The front is a one piece fiberglass with no airholes in the front,
Still the STD grill fitts right in. I made the plugg for the front myself
It´s a mild steel chassie( drive shaft and steering column are
cr-mo kits from Jerry B.)
Mild steel four-link( will be replaced this winter with cr-mo and
Aurora XAM 3/4-5/8" Unib.)
Front four-link plates will be bolted and have the possibility to move in 3 places(upp and down).
Auto. is a 727 with alum drum and low first gear and a TCI Pro tree transbrake( most of the parts are Turbo Action).
9" J TurboAction converter with over 5400 stall.
Rear wheels are 33x17x15 Good Year Pro Stock rubbers.
Rear axel is a Strange built full fl. Dana 60 with 4.10
Engine is dyno ed to 810 hp 6400 and 726 ftlb at 5400rpm.
The engine has newer been over 7000 rpm.
The car/engine is built for Super Gas/ Super Comp.
In Sweden there are many doorslammers running in SC

09-20-2002, 03:42 PM
Thats one Bad azz car,Tom! Can you tell us any specs on the motor,like cam, CR, carb etc.? I've have'nt heard of too many NA B1-BS motors makng that kind of power. Just curious whats inside there! ;)

09-21-2002, 08:08 AM
Start at the top, Carb. is a 1050-9375 with 3-circuit metering blocks and adjust. airbleeds.( almost a STD dom.)
Intake is a Indy 440-1 for 4150 carb. with a high adapter for 4500, intake is milled thinner and relocated boltholes to fitt.
Heads are gasket matched to max wedge size.

Block is a mega/siames moparblock with a stroker kit from Indy cyl. with a mopar 4.25" crank a BME 7.15" rods( top fuel) and
Wiseco flat top piston, CR is 13:1, the block is milled to achive that
CR and the heads are milled 1mm to a very small open chamber style so the pistons would go clear.
Piston rings are the new Total seal top ring.
( The engine was dyno ed with open gap rings)

Camshaft is a Crane roller In:707 and Ex:670, dur(050) In:276 and Ex:282, Valve lash is bigger than recom. 0.12", 0.20" Ex and 0.25" In, this was exper. on in the dyno. Crane gold 1.5 rockers.
Of course with more offset on the intake rockers.

Dry sump oilsystem and Jesel beltdrive.

Cranktrigger with 35 degress firm timing, even at starting.

Headders are Hedman 2 1/4" kit, that nedded a lot of work to fit
a tubbed chassie 22" c-c, lenght 32", collector mufflers type Borla.

09-21-2002, 04:00 PM
Wow, thanks,Tom, lotsa good stuff in there! So you had "header issues", too. When I was looking, I found a guy who made them for the Original B1 for around $550. But never did find any available for the B1-BS. BTW, its really cool that your workng with the B1-BS. Koffels told me recently that they put a BS motor that was intended for their Lil Red Ram in their sc dragster and are runnng 7.20s @ 180 mph! It was supposed to be until they got their "Big" motor done, but they were surprised how hard it ran! But, I have to ask, after looking at your combo, why you are not running the Original B1 heads? Is it because you dont want to spin the motor real high? With the Originals you'd probably be making closer to 1000 hp, I'm guesing. But that motor would probably have to turn around 8000 rpm to do it. Anyway,it's a fascinating combo and thanks again for sharing!;)

09-21-2002, 05:57 PM
Yes, this engine was built for low rpm and as little work as possible like replace
valve spring etc. betwenn runs. So far it has 170 runs total.
I bought this engine from a another Super Comp Racer in Sweden
So I have only made 20 1/4 mile runs myself, but this engine still
have the same springpressure (210 Pounds), without changing them.
Maybe it´s the spraybars in the valvecovers that cool the springs

09-23-2002, 04:23 AM
Read this and figures it must be Tommys old engine. Tommy has raced many times here in Finland and I always admired the way that engine worked. I've got a pretty similar engine although only with a 4.15" stroke, 440-1 heads and pump gas. It even makes the power and torque at about the same rpm, although a little less of both.

09-23-2002, 09:45 AM
Yes It´s Tommys "old Engine".
If anyone is interested my Coronet is on a picture(from an event this summer) on an Sweden
Web-page http://www.dragracing.se/gallerys/gold02.html
I don´t have an own Web-site ( will start one this winter

09-24-2002, 01:36 AM
Veeeery cool car you have:


10-02-2002, 11:57 PM
Just a couple of points to keep in mind. You need to keep a very close eye on the mopar stroker cranks for cracks around main journal #3. I have a couple of racing buddies who have lost entire big hp motors due to the crankshaft breaking in two. It isn't pretty. Second is that you will need to keep the motor fresh with titanium intake valves and keep the same close eye on the springs for loss of spring rate. Sounds like you have a potent S/Comp combination.