Moparts

tell me about blowers

Posted By: sixpackgut

tell me about blowers - 08/05/11 04:14 AM

as the Cuda project nears the end, i want to start my research for the next project, blown 426 gen 3 hemi for the challenger

i have been eyeing BDS and the stuff they have for bolting on a blower. is BDS any good? should i go 6-71 or 8-71? should my crank have 2 key ways? can a machine shop cut a crank for another key? tell me what else i need to know

Attached picture 6763718-hemi426-thumb.jpg
Posted By: MR_P_BODY

Re: tell me about blowers - 08/05/11 04:23 AM

Race or street... yes the crank can be cut for another
key... tell you what else you need to know.... well
it would be the big shiny thing on the top of the engine
Posted By: sixpackgut

Re: tell me about blowers - 08/05/11 04:29 AM

Quote:

Race or street... yes the crank can be cut for another
key... tell you what else you need to know.... well
it would be the big shiny thing on the top of the engine




street cruiser. i have heard or read that there would be less heat useing the bigger 8-71.

also, this wont be right away. i'm thinking i need to get the crank takin care of. probably put a mod man intake on it with 2 carbs for now. later when i have the cash i could just slap the blower right on the mod man

does this remotely sound like a plan of attack? i have to spend my money wisely
Posted By: MR_P_BODY

Re: tell me about blowers - 08/05/11 04:46 AM

Being that its a street cruiser you dont care about
the low compression till you put the blower on...I
have a 8-71 that I was going to put on the Rampage but
its sort of a PITA to look around on the street(JMO)
Posted By: Cab_Burge

Re: tell me about blowers - 08/05/11 05:55 AM

Stay as far away as you can from BDS , Hampton, Weiand, Littlefield and a bunch of others are a lot better From personel experiences on three BDS street and strip blowers As far as the size I wouuld look at a 8:71 or even a 10:71, if it will fit, the bigger blower will make more pressure at a lower RPM, you won't have to spin the blower real fast to make boost in other words 7 lbs at 150 F at 3000 RPM is way better than 10 lbs at 190 F at 3000 RPM The faster you spin a roots type blower the more heat it will make, added heat makes detonation under boost There are coolers that can placed between the blower and the intake but most of them restrict the air flow and end up making less power at the same boost, a big interference in the middle IHTHs
Posted By: Performance Only

Re: tell me about blowers - 08/05/11 11:51 AM

HAPPY BIRTHDAY
Posted By: sixpackgut

Re: tell me about blowers - 08/05/11 01:15 PM

Quote:

HAPPY BIRTHDAY



Thanks. you buying me a 8-71?
Posted By: sixpackgut

Re: tell me about blowers - 08/05/11 01:19 PM

Quote:

Stay as far away as you can from BDS, Hampton, Weiand, Littlefield and a bunch of others are a lot better From personel expereinces on three BDS street and strip blowers As far as the size I wouuld look at a 8:71 or even a 10:71, if it will fit, the bigger blower will make more pressure at a lower RPM, you won't have to spin the blower real fast to make boost in other words 7 lbs at 150 F at 3000 RPM is way better than 10 lbs at 190 F at 3000 RPM The faster you spin a roots type blower the more heat it will make, added heat makes detonatioon under boost There are coolers tp place between the blower and the intake but most of them restrict the air flow and end up making less power at the same boost, a big interference in the middle IHTHs




your 1st sentence is confusing. do just the BDS blower suck or what?
Posted By: Dragula

Re: tell me about blowers - 08/05/11 01:42 PM

I have had good luck with Craig at BDS on three seperate blowers. 1-was a 6-71, an 8-71, and lastly a 10-71, and none gave us any issues. I also purchased my FAST efi thru them way back when and they were great at supporting it. Can you be more specific about what was wrong with them?

Also to 6packgut, the modman intakes will support roots blowers, but I would look at a whipple and mount it on one of those intakes. Less heat, more boost, and just sick instant torque. They have one that is a direct replacement for a 6-71, but it might make a little too much boost for street. Also, there are you tube vids by a company that has been putting BDS blowers on these new Hemis and making 900hp on pump gas CMN motorsports I think...
Posted By: jim sciortino

Re: tell me about blowers - 08/05/11 01:57 PM

Save up and call Roger at PSI. They have gas style screws that adapt nicely to carbs. Cooler charge and more power everywhere.

Miles ahead of a roots.
Posted By: MR_P_BODY

Re: tell me about blowers - 08/05/11 01:58 PM

I have a Dyers 8-71... I want to send it back to them
for a freshen up and a polish job... I talked to them
a while back and it was pretty cheap for what I wanted done
Posted By: Dragula

Re: tell me about blowers - 08/05/11 03:18 PM

These!!

http://www.whipplesuperchargers.com/product.asp?ProdID=1232
Posted By: sixpackgut

Re: tell me about blowers - 08/05/11 03:20 PM

Quote:

Save up and call Roger at PSI. They have gas style screws that adapt nicely to carbs. Cooler charge and more power everywhere.

Miles ahead of a roots.



that sounds interesting

i would love a wipple but i dont want to mess with fuel injection
Posted By: sixpackgut

Re: tell me about blowers - 08/05/11 03:21 PM

Quote:

These!!

http://www.whipplesuperchargers.com/product.asp?ProdID=1232



oh snap. i like that!!

thanks for the link
Posted By: sixpackgut

Re: tell me about blowers - 08/05/11 03:23 PM

Quote:

Quote:

These!!

http://www.whipplesuperchargers.com/product.asp?ProdID=1232



oh snap. i like that!!

thanks for the link



holy crap, the prices
Posted By: smokinwoody

Re: tell me about blowers - 08/05/11 03:34 PM

Quote:

Quote:

Quote:

These!!

http://www.whipplesuperchargers.com/product.asp?ProdID=1232



oh snap. i like that!!

thanks for the link



holy crap, the prices



Happy Belated Birthday Ray...

I saw those prices too!!..

I have a small roots type blower, Weiand, on my SB chevy...its a good street blower but makes a lot of heat...if its a wow factor that you are looking for, then all means go for that chunk sticking out of the hood...if not then a centrifugal type like a pro-charger with an inter cooler would be a great way to go...also have you thought about Turbos?
Posted By: sixpackgut

Re: tell me about blowers - 08/05/11 03:58 PM

Quote:

Quote:

Quote:

Quote:

These!!

http://www.whipplesuperchargers.com/product.asp?ProdID=1232



oh snap. i like that!!

thanks for the link



holy crap, the prices



Happy Belated Birthday Ray...

I saw those prices too!!..

I have a small roots type blower, Weiand, on my SB chevy...its a good street blower but makes a lot of heat...if its a wow factor that you are looking for, then all means go for that chunk sticking out of the hood...if not then a centrifugal type like a pro-charger with an inter cooler would be a great way to go...also have you thought about Turbos?



thanks. your not belated. i'm 41 today

my friend in alabama wants to do twin turbos with the new holley management system. but it is more for the wow factor. the whole reason i built a guard rail car was to stop taking the challenger to the track. so 1000 hp isnt a priority but i guess it would be fun
Posted By: 1Fast340

Re: tell me about blowers - 08/05/11 05:04 PM

just thought i would add on the prices on twinscrews,they are expensive for a reason,the precision required machining the screws and housings are out of this world,they are incredibly tight without any parts touching mechanicly. just very slowly turning a twinscrew with the originalseals on the inlet and outlet will suck the inlet seal in and push the outlet seal out. not made in china is and understatement.

there is twinscrews available for singlecarb applications aswell as dualcarb applications (dont realy know what the front carb does on those,it cant work to its full use.) and injection.
Posted By: 70blackfish

Re: tell me about blowers - 08/05/11 05:27 PM

I have heard nothing but Good things about BDS, there is another blower Company, the blower shop, billet cases. and there about the same price as others,
http://www.theblowershop.com/

lets see some pictures of the cuda.
Posted By: Cab_Burge

Re: tell me about blowers - 08/05/11 05:45 PM

Quote:

Quote:

Stay as far away as you can from BDS, Hampton, Weiand, Littlefield and a bunch of others are a lot better From personel expereinces on three BDS street and strip blowers As far as the size I wouuld look at a 8:71 or even a 10:71, if it will fit, the bigger blower will make more pressure at a lower RPM, you won't have to spin the blower real fast to make boost in other words 7 lbs at 150 F at 3000 RPM is way better than 10 lbs at 190 F at 3000 RPM The faster you spin a roots type blower the more heat it will make, added heat makes detonatioon under boost There are coolers tp place between the blower and the intake but most of them restrict the air flow and end up making less power at the same boost, a big interference in the middle IHTHs




your 1st sentence is confusing. do just the BDS blower suck or what?

I edited my first post, I was not clear The first BDS blower leaked grease from the front seals, twice the second one siezed up on the dyno and he redid it saying it was a brand new blower when he brought it back I could see damage to the case and rotors when mounting the injector hat, it lost 5 lbs of boost in 15 minutes of operating it on the dyno while he was trying to dial in the EFI mapping I was pulled off of the project after that and the motor ended up with a Littlefiled 10:71 and ]Motech EFI No problems with Littlefields blowers I put another Littlefield 10:71 on a street and strip 426 hemi two years later and had absolutely zero issues That motor made 925 HP at 7300 RPM with 7 lbs. boost on CA pump gas
Posted By: jim sciortino

Re: tell me about blowers - 08/05/11 06:17 PM

Quote:

Quote:

Save up and call Roger at PSI. They have gas style screws that adapt nicely to carbs. Cooler charge and more power everywhere.

Miles ahead of a roots.



that sounds interesting

i would love a wipple but i dont want to mess with fuel injection

No injection needed for a PSI unless you want it. I have a couple doms on mine. "B" rotor for gas is about 7K, but ya only live once.

Those Whipples are nice too.
Posted By: sixpackgut

Re: tell me about blowers - 08/05/11 06:27 PM

Quote:

I have heard nothing but Good things about BDS, there is another blower Company, the blower shop, billet cases. and there about the same price as others,
http://www.theblowershop.com/

lets see some pictures of the cuda.



i guess i'm really going to need to research all these different blowers.

here is a pic of the cuda. hasnt made it out of the garage yet though. its just a bunch of free or cheap junk thrown together. when i scaled my challenger, i weighed the cuda and it was 900 lb lighter but was missing a bunch of stuff like windows, seats, driveshaft and exhaust

Attached picture 6764505-movie003.jpg
Posted By: Dragula

Re: tell me about blowers - 08/05/11 06:47 PM

Quote:

Quote:

I have heard nothing but Good things about BDS, there is another blower Company, the blower shop, billet cases. and there about the same price as others,
http://www.theblowershop.com/

lets see some pictures of the cuda.



i guess i'm really going to need to research all these different blowers.

here is a pic of the cuda. hasnt made it out of the garage yet though. its just a bunch of free or cheap junk thrown together. when i scaled my challenger, i weighed the cuda and it was 900 lb lighter but was missing a bunch of stuff like windows, seats, driveshaft and exhaust



Honestly, best bang for the buck is "www.thesuperchargerstore.com" and one of their Procharger kits. They make more hp than a 6-71 even on a mild tune, and they are easier to fit in the engine bay and under a hood. I love the SMRE reverse mount system they make for them on the big blocks...
Posted By: sixpackgut

Re: tell me about blowers - 08/05/11 06:53 PM

Quote:

Quote:

Quote:

I have heard nothing but Good things about BDS, there is another blower Company, the blower shop, billet cases. and there about the same price as others,
http://www.theblowershop.com/

lets see some pictures of the cuda.



i guess i'm really going to need to research all these different blowers.

here is a pic of the cuda. hasnt made it out of the garage yet though. its just a bunch of free or cheap junk thrown together. when i scaled my challenger, i weighed the cuda and it was 900 lb lighter but was missing a bunch of stuff like windows, seats, driveshaft and exhaust



Honestly, best bang for the buck is "www.thesuperchargerstore.com" and one of their Procharger kits. They make more hp than a 6-71 even on a mild tune, and they are easier to fit in the engine bay and under a hood. I love the SMRE reverse mount system they make for them on the big blocks...



the problem there is i think FI is better suited for prochargers and turbos and that adds alot o the cost. so much so that i may as well buy a 10k wipple
Posted By: DusterDave

Re: tell me about blowers - 08/05/11 06:55 PM

Just to add some balance to the conversation, I never had any problems with my BDS 8-71. It was just an unstripped stage 2 blower. Trust me, it will make way more power than you can handle on the street.
Posted By: VZCharger

Re: tell me about blowers - 08/06/11 12:35 AM

Just picked my motor up yesterday from Bartons.
Has an 8-71 stepped up from a 6-71 a few years ago; did spin slower and made less heat.
Also when I spoke to Indy about their Modman intake they told me that it would be the limiting factor in my motor; and that I was better off using their dedicated blower manifold and porting my Indy SR heads to match. Needed an intake that could accept injectors for my Fast XFI system on this motor.

Attached picture 6765022-DSC05212copy.jpg
Posted By: 70blackfish

Re: tell me about blowers - 08/06/11 07:26 AM

Quote:

Just picked my motor up yesterday from Bartons.
Has an 8-71 stepped up from a 6-71 a few years ago; did spin slower and made less heat.
Also when I spoke to Indy about their Modman intake they told me that it would be the limiting factor in my motor; and that I was better off using their dedicated blower manifold and porting my Indy SR heads to match. Needed an intake that could accept injectors for my Fast XFI system on this motor.



What kind of power is this motor making? looks good!
Posted By: SV_MOPARS

Re: tell me about blowers - 08/07/11 04:25 PM

i agree stay away from bds, they are jokers who don't stand behind there over priced junk, go with "the blower shop", excellent products and great customer service and they stand behind there product.
Posted By: sixpackgut

Re: tell me about blowers - 08/07/11 05:01 PM

Quote:

Just picked my motor up yesterday from Bartons.
Has an 8-71 stepped up from a 6-71 a few years ago; did spin slower and made less heat.
Also when I spoke to Indy about their Modman intake they told me that it would be the limiting factor in my motor; and that I was better off using their dedicated blower manifold and porting my Indy SR heads to match. Needed an intake that could accept injectors for my Fast XFI system on this motor.



that motor looks nasty.
Posted By: BDS871Cuda

Re: tell me about blowers - 08/07/11 07:24 PM

Quote:

Just to add some balance to the conversation, I never had any problems with my BDS 8-71. It was just an unstripped stage 2 blower. Trust me, it will make way more power than you can handle on the street.




Maybe I can add a little info about a stage II.
I bought mine from Herb Stotler racing out of
Miami FL. The BDS 8-71 stage II on mine was
a Teflon coated inner case instead of the Teflon
striped roaters. Way less maintance and still
good blower psi at a lower blower speed.

Attached picture 6767856-Cudastuff022.jpg
© 2024 Moparts Forums