Teague Tips with B&M 250 SC
 

I was going to jump into the middle of a previous post but some of those in the know already chimed in so I will start a new one.

http://www.offshoreonly.com/forums/s...threadid=43221

Seems to be a divergence of opinion and I would like to know.

Can Teague tips (or any tip which blocks of part off the flow and diverts the exhaust/water to the outer diameter of the tip) be used with a B&M SC and if so up to what RPM using 5lbs. boost? Would cruising at 3000 to 3200 be OK or would this cause excessive heat? These tips in a NA motor are generally advised to not be use above around 3200 to 3500 in the closed position. What about idleing? Should they be open or closed to help prevent reversion? Lightning headers and cam of around 236/242 on 114 cl.

Tim T.

cpqtim, I am not familiar with Teague Tips. They can probably tell you what you need to know. However, cruise at 3,000-3,500rpm won't be a problem with the blower unless it would be without one. When you are cruising, a good motor will be in vacuum, not boost so the blower is just along for the ride. Only when you are on the throtle far enough to make boost does the blower make much difference. Good cam choice. Crane 741?

I would call teaque but I know that I have run my engines with the tips closed up to 4800rpm's. I would think that the bigest issue would be your cam choice but give them a call. I love mine.

Call Teague. I am sure they will not reccomend it but I can tell you it has been done. I run a 525cu 1071 blower and have done it. Biggest issue I have is back pressure causing high water pressure. I blew a water hose from the raw water pump to power steering cooler last year running my Teague Mufflers closed. I only run a water pressure gauge for testing and will actually see how high water pressure goes later this year. Never any issue with reversion. I run more cam than you are and mine idles better with them shut than open. I run CMI Elbow top exhaust. I like mine because I don't run with them shut that often. If I ran with them shut at those RPM's most of the time I think I would go with a full time muffler with less restriction. Just my .02

That sounds reasonable. Yes, the cam will probably be a 741. Package not assembled yet and I have not selected the cam. I was going to get some recommendations from Crane and then post them here to see what the board thinks. US1 Fountain ran the 741 with good results so I did not want to deviate from his setup without a good reason. From reading about the crossover setups it seems there may be some considerations with water pressure. Not quite sure how to address this yet. Thanks for the info.

Tim T.

Tim,
I'm sure you are aware of this, but the cam card sheet I gave you was for my motor, a GenV. If I recall correctly, yours is a Gen6? So will have to order the 741 cam accordingly.
Jerry

Jerry,
Noticed that, looks like it should be 168741. Looks like about the same cam.
http://dab7.cranecams.com/SpecCard/D...1=Display+Card
http://dab7.cranecams.com/SpecCard/D...1=Display+Card

Several degrees different on the cam timing.
I need to check with Crane to see if I can retain the stock lifters.

Tim T.

Canada Jeff,
Nice idea on the hole saw setup.
Using the 4" for a pilot, ehh!
Thanks, Russ

Crane has changed the printed specs for the 741 grind. Still the same cam. All the 741's are the same grind, just different cores to fit the different blocks. That is probably the best over-the-counter all purpose go-fast cam I know of. If your lifters are in good shape, I would re-use them. I have many times and had no problems. Be sure to use good springs.

Yeah, use the correct springs too!
And don't pay the builder in St. Louis to install new ones, only to have your old originals glass beaded and reinstalled with a bunch of shims under them. :mad:

Guess maybe by beading them, it makes them new, huh?! :rolleyes:

there are alot of ways( mech.water dumps Ect. ))to control pressure don't let that bother you ,The 741 is a killer cam ,you can pick upabout 45hp using a comp that 1500 has custom ground and I've used alot of ,contact him if interested

Jerry,

I'm all over that one! Got the shiny object in the downstairs garage, Dan and I are getting the jet and PV numbers. Just a came upstairs to get a pencil. Looks like 124's in front. I better start tossing 20's in the jar for gas! Did you happen to replace the top oil fill plug? The manual says that the fill plug has a small hole in it for a vent, the plug I am seeing has no hole. Oh well, it worked all this time.

Tim T.

Tim, I have already persued the plug conscern.
If you run the plug with the hole, I think it was around .020, you will get a nice film spray on the bottom of your hatch and all over the top of the blower. Ain't cool! I talked with The Blower Shop about this 2 yrs ago thinking the front oil seal was bad. They said it was from a slight pressureizing of the front housing when you get into the boost. The seal is a single lip orientated to keep the oil in, so naturally little pressure on the back side will blow past it. Holley/ B&M now recommended to use the solid plug and just change the gear oil at least once a yr, according to Blower Shop. You'll be fine as is.
I think all 4 corners have same jetting.

Jerry

OK, on the plug. Documentation was probably for automotive. My guess is that in a car there is enough air blowing around under the hood to carry it away. Checked the rear jets, they are 134's with blocked off PV. Did you ever consider installing the rear PV and boost referencing it? That would be a question for the blower shop I suppose.

By the way that was a really cool box of spares, already broke into it for a friends Holley.
Tim T.

Tim,
Nope, never considered anything else once it was done. It wasn't broke, and I couldn't see how it could have ran any better, so left it as you have it. Those jets do sound a tiny large, huh? :) Like I said before, my transom was always spotless. Maybe Blown and 1500 may have better thoughts. Getting out of my league as far as changes. The new red metering gaskets are for the carb as is, I just never installed them. They do have a couple of extra holes from the installed ones, but If you study the flow passages, you will notice they are more or less blind holes. The green gaskets are from when Bruce referenced it and installed the JER metering blocks. I thought the red would go with the powdercoating better. :) It's all about looks!

How do you guys chage the oil in these Blowers ? Suck it out the
bottom hole ?

Oh....Back to the tips.....
Any deals on 2 pair of clamp on switchables ?