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tell me about blowers
#1047362
08/05/11 12:14 AM
08/05/11 12:14 AM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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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
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: tell me about blowers
[Re: sixpackgut]
#1047365
08/05/11 12:46 AM
08/05/11 12:46 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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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) 
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Re: tell me about blowers
[Re: sixpackgut]
#1047366
08/05/11 01:55 AM
08/05/11 01:55 AM
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Joined: Aug 2003
Posts: 43,127
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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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
Last edited by Cab_Burge; 08/05/11 01:36 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: tell me about blowers
[Re: Cab_Burge]
#1047369
08/05/11 09:19 AM
08/05/11 09:19 AM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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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?
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: tell me about blowers
[Re: sixpackgut]
#1047370
08/05/11 09:42 AM
08/05/11 09:42 AM
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Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
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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...
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Re: tell me about blowers
[Re: Dragula]
#1047372
08/05/11 09:58 AM
08/05/11 09:58 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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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
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Re: tell me about blowers
[Re: sixpackgut]
#1047377
08/05/11 11:34 AM
08/05/11 11:34 AM
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Joined: Apr 2004
Posts: 12,339
somwhere
smokinwoody
I Live Here
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I Live Here
Joined: Apr 2004
Posts: 12,339
somwhere
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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?
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Re: tell me about blowers
[Re: smokinwoody]
#1047378
08/05/11 11:58 AM
08/05/11 11:58 AM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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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
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: tell me about blowers
[Re: 1Fast340]
#1047380
08/05/11 01:27 PM
08/05/11 01:27 PM
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Joined: Jan 2003
Posts: 4,152
SO. CAL.
70blackfish
master
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master
Joined: Jan 2003
Posts: 4,152
SO. CAL.
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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.
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Re: tell me about blowers
[Re: sixpackgut]
#1047381
08/05/11 01:45 PM
08/05/11 01:45 PM
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Joined: Aug 2003
Posts: 43,127
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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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
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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