Blower Question

[Incognegro]

Im getting a great deal on a B&M 140 series blower with the manifold and demon carb. manifold is brand new,carb is new and blower was rebuilt by Holley, none of it was ever installed on his car, he scrapped the project. My question is this:

I have a built 355 sbc with the following build
Machine work
Bore & Hone with deck plate
vat degrease
cam bearings and installation
Deck
Balance

Parts
Pistons KB KB 112 + .040
Rings Childs Albert + .040
Rods Eagle 6" H-beam
Timin Chain Cloys, street Roller
Oil pump Melling high volume(no pick-up)
Main bearings Cleavite 77 "P" std
Rod bearings Cleavite 77 "P" std
Crankshaft Cast steel, Skat
Damper Powerbond HP
Head Gaskets Felpro 1003
Intake gaskets Felpro 1205
Intake manifold Weiland 17530
Solid lifters
3 Comp Cam pushrods
Mr Gasket Head bolts (From Pugh)
ARP 4 bolt main bolts
One World Sportsman II head,springs,locks& seals
Head bolt washers
5 Comp Cams pushrods 7972
cam:
Lunati cam-40146 Intake exhaust
duration 0.543 0.552
lift@50 249 254

Compression 10.18
world product sportmans heads 202



woul i be safe running the blower on this motor? Keep in mind I plan on running 100 Octane which I have readily available locally. Any input or thoughts?

[cncmotorsports]

100 octane yes, make sure you pay very close attention to the amount of boost. 4 - 6 pounds on 100 octane will be fine, any more than that will be border line for detonation ( KB pistons will not tolerate any ). Make sure your timing is 32 or 34 degrees and use a colder spart plug, such as a NGK - 8
I think the number is 5672-8 for the sportsman heads or AR133

[Incognegro]

100 octane yes, make sure you pay very close attention to the amount of boost. 4 - 6 pounds on 100 octane will be fine, any more than that will be border line for detonation ( KB pistons will not tolerate any ). Make sure your timing is 32 or 34 degrees and use a colder spart plug, such as a NGK - 8
I think the number is 5672-8 for the sportsman heads or AR133

I was using the AR132 or 133 I believe. Autolites. 32-34 timing is good? not too high? Also one more question..

Will a holly 750 boost referenced carb be enough flow for this particular Motor and blower combo?

Also, what kind of power will this put out?

[cncmotorsports]

Carb will be fine, combo should make 500 HP

[kwkracing]

In my opinion the only worse piston to use for that would be a stock one than a kb cast or hypreutectic in a boosted situation.

[Incognegro]

In my opinion the only worse piston to use for that would be a stock one than a kb cast or hypreutectic in a boosted situation.

Thats what everyone is saying. Dont think Im gonna risk it in this motor.

[curtisreed]

KB make forged piston also that are very nice and priced pretty good. I have them in my 383.

Curtis

[Incognegro]

KB make forged piston also that are very nice and priced pretty good. I have them in my 383.

Curtis
Got a part number or link? Also my cam is not optimal,would have to change that too.

[cncmotorsports]

KB make forged piston also that are very nice and priced pretty good. I have them in my 383.

Curtis
Got a part number or link? Also my cam is not optimal,would have to change that too.

If you change the pistons, here is a link to a New KB Icon.
They are very nice.

http://www.cnc-motorsports.com/product.asp?ProdID=12784&CtgID=12783

Agreed, Hyperutetic and boost not a great idea, but it does work if your a good tuner.

[Incognegro]

KB make forged piston also that are very nice and priced pretty good. I have them in my 383.

Curtis
Got a part number or link? Also my cam is not optimal,would have to change that too.

If you change the pistons, here is a link to a New KB Icon.
They are very nice.

http://www.cnc-motorsports.com/product.asp?ProdID=12784&CtgID=12783

Agreed, Hyperutetic and boost not a great idea, but it does work if your a good tuner.


Thats rods and pistons for that price?

[bjuice]

Is your motor together ? I personally would not run static compression that high if its gonna be a street driven machine..It limits the amount of boost you can run....I would drop it back to 9:1 static compression and be able to run a little more boost..while keeping the Bottom end Tq Respectable...I would also go with a cometic head gasket...Proper cam selection is gonna mean all the difference in the world...

what is your purpose with the engine,,Street or Strip ?....The Boost from a Blower motor is what the prize Treasure is all about...If you have a chance to look at a dyno sheet from one of these (smallest of blowers) I think you will find that the Tq Curve is what is so impressive about running a blower making boost...and why its most important to get the extra 3 or 4 Lbs of Boost from these blower set ups...
The HP increase is OK but you will appreciate the TQ the blower makes way more then the HP.

What your after with this blower is when getting it in High gear its still pulling your Nuts off at 80/100 mph

I too have a 144 B&M blower I have sitting in the shop.....also got The crank,rods and Pistons......

[Incognegro]

Is your motor together ? I personally would not run static compression that high if its gonna be a street driven machine..It limits the amount of boost you can run....I would drop it back to 9:1 static compression and be able to run a little more boost..while keeping the Bottom end Tq Respectable...I would also go with a cometic head gasket...Proper cam selection is gonna mean all the difference in the world...

what is your purpose with the engine,,Street or Strip ?....The Boost from a Blower motor is what the prize Treasure is all about...If you have a chance to look at a dyno sheet from one of these (smallest of blowers) I think you will find that the Tq Curve is what is so impressive about running a blower making boost...and why its most important to get the extra 3 or 4 Lbs of Boost from these blower set ups...
The HP increase is OK but you will appreciate the TQ the blower makes way more then the HP.

What your after with this blower is when getting it in High gear its still pulling your Nuts off at 80/100 mph

I too have a 144 B&M blower I have sitting in the shop.....also got The crank,rods and Pistons......

The motor is together and has about 30 pases and some street time on it in my old Camaro. I was thinking of dropping it in my pro street comet and then the blower deal came along which i could not pass up. So basically Im looking at pistons,rebalancing the assembly,changing the cam,and new head gasket to run this blower.

I plan on street cruising and just want more balls in my Comet, for the occasional trip to the track. But 95% driving will be street cruising.

[cncmotorsports]

KB make forged piston also that are very nice and priced pretty good. I have them in my 383.

Curtis
Got a part number or link? Also my cam is not optimal,would have to change that too.

If you change the pistons, here is a link to a New KB Icon.
They are very nice.

http://www.cnc-motorsports.com/product.asp?ProdID=12784&CtgID=12783

Agreed, Hyperutetic and boost not a great idea, but it does work if your a good tuner.


Thats rods and pistons for that price?

That's pistons only

[Incognegro]

I would need to change my cam also.

[THERATTLER]

I think I would just build a short block for the blower and leave my other motor together ,,JMO

[Incognegro]

I think I would just build a short block for the blower and leave my other motor together ,,JMO
i might just build a big block..lol..

[burnskustomz]

Heres a little cheaper selection of pistons maybe you can find some cheaper ones. This is towards the Icon pistons that you were talking about.
http://www.competitionproducts.com/Icon-FHR-Series-Pistons/products/1152/

[MEMRACING62]

welcome back seth....where ya been? :P

[Incognegro]

Heres a little cheaper selection of pistons maybe you can find some cheaper ones. This is towards the Icon pistons that you were talking about.
http://www.competitionproducts.com/Icon-FHR-Series-Pistons/products/1152/
There is no piston on that page that suits my needs.

[Tod74]

welcome back seth....where ya been? :P

detention....cleaning erasers. :lol:

[zipper06]

Heres a little cheaper selection of pistons maybe you can find some cheaper ones. This is towards the Icon pistons that you were talking about.
http://www.competitionproducts.com/Icon-FHR-Series-Pistons/products/1152/
There is no piston on that page that suits my needs.

Good thing, those pistons are not much better than hypereutetic piston, they both have about the same amount of silicon as forged 4032 mat'l pistons and will not live long with a blower or on nitrous. You need to stick to a 2618 alloy if you decide to go blown.
Here's the write up on the piston mentioned in the previous post.

Zip.

Speed-Pro POWERFORGED pistons
are offered in two patented highstrength
aluminum alloys – VMS-75
(for street use and many racing applications)
and 2618 (exclusively for
racing use). The VMS-75 alloy contains
approximately 11 percent silicon
which, as in selected hypereutectic
alloys, greatly increases surface
hardness, scuff resistance, and
reduces ring groove wear.
The stronger 2618 alloy, by contrast,
contains no silicon and is,
therefore, more susceptible to scuffing
and ring groove wear. This alloy
also requires increased bore clearance
and thorough engine warm-

[kwkracing]

a nice inexpensive set of speed pro (trw) forged pistons would do fine in this little blower motor.