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Roots Blown Smallblocks
#1445540
05/31/13 01:32 PM
05/31/13 01:32 PM
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Joined: Jan 2003
Posts: 2,533
Alexandria, LA
Blucuda413
OP
master
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OP
master
Joined: Jan 2003
Posts: 2,533
Alexandria, LA
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Give us your experience with roots blowers on smallblocks. Photos please!! Tell us about size engine, heads, manifold, size blower, boost level, induction system, and performance/horsepower. Thanks!!
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Re: Roots Blown Smallblocks
[Re: Dragula]
#1445542
05/31/13 03:31 PM
05/31/13 03:31 PM
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Joined: Feb 2007
Posts: 2,578
sweden
1Fast340
master
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master
Joined: Feb 2007
Posts: 2,578
sweden
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 Sorry not a Roots,its just a little Lysholm 3.3litre screw .030 over 340 with ancient TRW pistons 9.7:1 compression and Eagle H-beam rods. Small comp extreme energy solid roller 242/248 at .050 .570/.576lift ported Edelbrock rpm heads Billet intake manifold. Prosystems E85 dominator. its not running yet so i cant tell you much about performance or power,but it should make 550 or so HP at a sane level of boost and maybe alitle more at 14psi screws are lots more efficient than roots.
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Re: Roots Blown Smallblocks
[Re: Dragula]
#1445543
05/31/13 05:05 PM
05/31/13 05:05 PM
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Joined: May 2011
Posts: 4,489
northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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Quote:
I asked that question here....Didn't work out so well, and I won't be asking anyone anything on this site anymore.
Ya get that feeling around here sometimes don't ya!?Me tooooo!  
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Re: Roots Blown Smallblocks
[Re: Blucuda413]
#1445547
05/31/13 10:28 PM
05/31/13 10:28 PM
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Joined: Mar 2004
Posts: 702
OZ
CRIKEY
super gas
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super gas
Joined: Mar 2004
Posts: 702
OZ
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Here is 1 we done for a customer. OEM 340 cu 8.5:1 Ported Eddies 6/71 w/ street clearance 10% under 12psi Custom SMALL solid roller 2 x 750 DP Engine dyno 625HP - PULP 730HP - E85 
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Re: Roots Blown Smallblocks
[Re: CRIKEY]
#1445548
05/31/13 11:59 PM
05/31/13 11:59 PM
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Joined: May 2011
Posts: 4,489
northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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Quote:
Here is 1 we done for a customer.
OEM 340 cu 8.5:1
Ported Eddies
6/71 w/ street clearance 10% under 12psi
Custom SMALL solid roller
2 x 750 DP
Engine dyno
625HP - PULP
730HP - E85
Interesting double master cylinder for the brakes.Cool!
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Re: Roots Blown Smallblocks
[Re: radar]
#1445549
06/01/13 08:28 AM
06/01/13 08:28 AM
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Joined: Feb 2007
Posts: 2,578
sweden
1Fast340
master
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master
Joined: Feb 2007
Posts: 2,578
sweden
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Quote:
I have not seen a lot of stuff made for LA blowers. Those chevy guys can just call jegs or summit and drop 4k for a nice setup. I think you need deep pockets and or a mill and a tig welder to make a 6-71 or whatever happen on your 360 LA.
Too bad- I know ever since I saw my first one I wanted a roots blower with a big fat belt on it whining and loping away. I just don't have a hemi or bigblock. Really a bigblock is peanuts $ compared to setting up a blower isn't it?
I really enjoy seeing you guys with the holes in your hoods- somebody's gotta do it! Too bad you're not feeling the love around here- you're my heroes!!
its not all that hard,call your indydealer of choice and order the intakemanifold or maybe even a complete kit.
im sick of the bitching about no parts being available when they clearly are available. as for the chevy and ford stuff being cheaper well tough luck they are a much bigger market. parts are available and moparowners in general are whiny cheapskates.
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Re: Roots Blown Smallblocks
[Re: Dragula]
#1445550
06/01/13 09:01 AM
06/01/13 09:01 AM
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Joined: Mar 2006
Posts: 9,871
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,871
MI, usa
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I've run mine for 28 years. It's a smaller 6V-71 mounted on a single 4 barrel intake. 8-1 comp,240@.050" cam, mildly ported 308 iron head, 2 carter 750. At 12psi it runs 11.0@122 at 3890lbs thru the mufflers. It's a fun street car. For my money if I was to do it again it would be a turbo. My sons Savoy has less cam (224@.050") and less gear (2.76 vs 4.30). Though he does have more cubes (366 vs 344) and probably 200 lbs less. It runs easy 10.70@127. Doug
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Re: Roots Blown Smallblocks
[Re: dvw]
#1445551
06/01/13 10:42 AM
06/01/13 10:42 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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Years ago I ran a SB with a roots style blower.. I made the intake out of a spare tunnel ram intake.. I milled it to the height I wanted and welded a 5/8" alum plate to the intake... worked fine... I set it up so the pulleys were in alignment and the pulleys were parallel.. I use to flip the upper and lower pulleys to go from over driven to under driven.. now days you can find the parts(they are out there) but back when I did it there wasnt much and I was cheap so I made most of my junk(sorta like I am now... LOL) 
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Re: Roots Blown Smallblocks
[Re: Clanton]
#1445553
06/02/13 04:09 AM
06/02/13 04:09 AM
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Joined: May 2012
Posts: 169
Finland, Europe
Ck[FIN]
member
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member
Joined: May 2012
Posts: 169
Finland, Europe
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Few years ago i built 360 with 6/71 blower
360 bored 0.030
Eddy heads
Stock crank,
Cat rods
Forged pistons
9.0:1 CR
purple cam from swap meet
6/71 9psi
dual 600cfm vacuum holley
520hp/530ftlbs
10.68s best run 1/4mile
-1965 Valiant 9.03s 358cu.in R5P7-
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Re: Roots Blown Smallblocks
[Re: dogdays]
#1445555
06/02/13 07:49 AM
06/02/13 07:49 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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Quote:
Dyers blowers still in business?
R.
Yes they are... I talked to them about a year ago
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Re: Roots Blown Smallblocks
[Re: Blucuda413]
#1445557
06/02/13 01:56 PM
06/02/13 01:56 PM
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Joined: Mar 2006
Posts: 9,871
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,871
MI, usa
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Quote:
Thanks guys for all the input but I'm sure there is more info out there. The unit for sale in the "craigslist" area is a 6V-71. Would probably make a nice street unit but it's not much of a competition unit probably not much better than a 4-71. I have looked at the manifold built in Aussie land and it is a nice looking piece, I would have designed it a little differently but it was probably designed for street use. The blower sits a lot to the rear which I believe would make it very difficult in selecting a distributor. Someone mentioned the Indy manifold but it looks to me like it is built for magnum heads. Some of the other companies make manifolds but they are very expensive. I was hopeing I could use a 12-71 that I have but it looks like it is too long. I will probably have to trade it for either a 6 or 8-71. Mr P's idea is probably the best betbecause you could place the blower exactly where you wanted it.
Please continue with the discussion there are always items to be learned from experience. Thanks, Max
Dyers is still in business. They are the only ones that ever used 6V-71. The stock distributor fits without issue. It has the same rotor diameter as a 4/71 or 6/71. The length of the rotors is half way between the two. It was originally designed for a GMC V6 diesel to scavenge exhaust. The 6/71 is for an inline diesel. How fast do you want to go? The larger the blower the slower you have to turn it to get the same boost, less intake temp. Running a roots on gas in competition is a loosing battle. Alcohol or E85 is the way to go. I'd still run a turbo.
Doug
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Re: Roots Blown Smallblocks
[Re: Blucuda413]
#1445558
06/02/13 02:42 PM
06/02/13 02:42 PM
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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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Quote:
Thanks guys for all the input but I'm sure there is more info out there. The unit for sale in the "craigslist" area is a 6V-71. Would probably make a nice street unit but it's not much of a competition unit probably not much better than a 4-71. I have looked at the manifold built in Aussie land and it is a nice looking piece, I would have designed it a little differently but it was probably designed for street use. The blower sits a lot to the rear which I believe would make it very difficult in selecting a distributor. Someone mentioned the Indy manifold but it looks to me like it is built for magnum heads. Some of the other companies make manifolds but they are very expensive. I was hopeing I could use a 12-71 that I have but it looks like it is too long. I will probably have to trade it for either a 6 or 8-71. Mr P's idea is probably the best betbecause you could place the blower exactly where you wanted it.
Please continue with the discussion there are always items to be learned from experience. Thanks, Max
You would be surprised at how much pressure you
can make with a 6/71... turn it harder but it will
still make heat... thats the problem with anything
that compresses air... it makes heat(just like your
home air compressor)... but a roots blower sticking
thru the hood will always be cool
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