Thread: sbc400 with a 144 blower

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i have a 71sbc 400 that is .30 over and i have a 144 weiand blower wanted 2 know if that was a good combo for street use in my 81 Z28 (the sled)and would it be 2 much 2 take it .40 over i will be using kb-30cc dish pistons 4 the lower compression and a 76cc head with steam holes also i have a built 350 turbo with a b&m holeshot 2400 and a eaton posi with 373 thanx

I would keep the block at .030 if I could, but you could go .040 if you had to. The B&M 144 would work but it is a little small for that many cubic inches. You would be better off with the larger version which I think is a 174. You want your compression ratio between 8.0:1 and 8.5:1. Otherwise you will not be able to run much boost which defeats the purpose of a blower. And make sure you run a blower cam which has a lobe center of around 114 degrees to minimize overlap which will bleed off boost.

thanx rumrumm 4 your piece of mind some1 told me i needed a 114 blower cam then i talk 2 a tech at lunati and he told me dont get a 114 but 2 get a 110 lobe and i thought it didnt sound rite since 5 or 6 other people told me the same thing you did

You are welcome. I set up a 355 sb in my previous street rod with a 144 blower, so I worked with B&M tech staff to get everything correct. With 6-7 lbs of boost, that 2200 lb. car ran like a scalded dog! I used the largest of the three CompCams blower grind cams and liked it a lot, but with your engine you would need something a little bigger. You don't need a big lumpy cam with a blower.

Originally Posted by rumrumm

You are welcome. I set up a 355 sb in my previous street rod with a 144 blower, so I worked with B&M tech staff to get everything correct. With 6-7 lbs of boost, that 2200 lb. car ran like a scalded dog! I used the largest of the three CompCams blower grind cams and liked it a lot, but with your engine you would need something a little bigger. You don't need a big lumpy cam with a blower.

do you have a cam in mind 4 me

Call CompCams, Crower, and Crane. See what they recommend and go with the middle one. It is a good practice to compare what different cam companies recommend. And by going with the middle one, you are probably making a good choice.

Blower Drive Service favors 110* LSA. Here are some of their offerings......
http://www.blowerdriveservice.com/bcamspecs.php

thanks guys ima check it out

is a c.a.l (cat) balancer ok 2 use on my motor,what about 1.5 earson roller rockers are they any good

I'm not certain, but I think that balancer is Chinese-made and I wouldn't trust it any further than I could throw it. If you don't need an aftermarket SFI 18.1 balancer for drag racing, then just get a good stock balancer and double-key it. Here's a good source....
http://www.damperdoctor.com/

If you mean Erson, it is now part of the Mr. Gasket conglomerate. I wouldn't hesitate to use any of their products.

Originally Posted by techinspector1

I'm not certain, but I think that balancer is Chinese-made and I wouldn't trust it any further than I could throw it. If you don't need an aftermarket SFI 18.1 balancer for drag racing, then just get a good stock balancer and double-key it. Here's a good source....
http://www.damperdoctor.com/

If you mean Erson, it is now part of the Mr. Gasket conglomerate. I wouldn't hesitate to use any of their products.

thanx i thought sumthin was wrong about it

Originally Posted by techinspector1

I'm not certain, but I think that balancer is Chinese-made and I wouldn't trust it any further than I could throw it. If you don't need an aftermarket SFI 18.1 balancer for drag racing, then just get a good stock balancer and double-key it. Here's a good source....
http://www.damperdoctor.com/

If you mean Erson, it is now part of the Mr. Gasket conglomerate. I wouldn't hesitate to use any of their products.

Over 99% of the time I agree with what Richard says but not this time.
I would never run a stock balancer with a roots style supercharger.
You will rip the outer ring right of the inner ring because the interia ring will break away.
Either buy a crank hub or buy the a very good ATI SFI approved supercharger balancer.
The lower priced Romac supercharger balancers will also work.

Originally Posted by erik erikson

Over 99% of the time I agree with what Richard says but not this time.
I would never run a stock balancer with a roots style supercharger.
You will rip the outer ring right of the inner ring because the interia ring will break away.
Either buy a crank hub or buy the a very good ATI SFI approved supercharger balancer.
The lower priced Romac supercharger balancers will also work.

Well Duh!!! The blower part of it went right over my head. Thanks Erik.

Originally Posted by techinspector1

Well Duh!!! The blower part of it went right over my head. Thanks Erik.

hey reguardless you both gave me good info i appreciate it

If you mean Erson, it is now part of the Mr. Gasket conglomerate. I wouldn't hesitate to use any of their products.[/quote] i am happy to say there not own by MR gasket . i am hopping for the better and now i can deal with them