June 17, 2019, 09:30:19 PM

Author Topic: Low profile roots blower options LS3  (Read 880 times)

Offline ZekeO

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Low profile roots blower options LS3
« on: March 03, 2019, 11:09:16 AM »
What are some options for a roots blower? Using the samberg k-member/cradle and stock hood.

Prefer not to get a cowl hood if possible.

Also read the dodge demon are breaking diffs. Does the diff brace make that much of a difference?
'93 RX-7
'04 M3 Convertible

Online sciff5

Re: Low profile roots blower options LS3
« Reply #1 on: March 03, 2019, 04:44:27 PM »
The TVS blowers are about the lowest profile available. Height also depends on how large the heat exchanger is, either way you're going to need a cowl. Even the corvette it came from had a cowl.

Offline ZekeO

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Re: Low profile roots blower options LS3
« Reply #2 on: March 03, 2019, 06:06:37 PM »
Dang. I like the sleek look of the one hood.
'93 RX-7
'04 M3 Convertible

Offline Exidous

Re: Low profile roots blower options LS3
« Reply #3 on: March 03, 2019, 06:27:45 PM »
There isn't one that fits under the stock hood otherwise I'd have one.

The closest you get is the magna heartbeat. I think it's about an inch taller than a fast102 which means 7/8" of it is sticking out of the hood. The fast is a couple pieces of thick paper from touching.

Even if you ran without motor mounts and moved the rack down I think you'd still come up a hair short.
94 BB SBE LS1 Full Mamo top, MS3ProU with TC, RONIN 8.8 and another custom dual 2.5" stainless exhaust. Too loud, need bigger muffler....

Offline sonicgroove

Re: Low profile roots blower options LS3
« Reply #4 on: March 04, 2019, 04:15:12 PM »
I've been thinking about this as well and having a hard time finding a way to SC the motor with a roots setup while maintaining the stock hood. Right now I'm thinking GM's solution  for the new vettes might be the best option and that is to create a shaker hood for the FD. Designing one that doesnt ruin the sleek curves of the car would be difficult though.

-groovin
1987 MAZDA RX-7 LS1 T56 | 1995 MAZDA RX-7 ST PORT BOLT-ON'S ADAPTRONIC PNP | 1994 MAZDA RX-7 TSP 416 LS3 T56 MAGNUM E40 ECM

Offline ZekeO

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Re: Low profile roots blower options LS3
« Reply #5 on: March 04, 2019, 07:17:19 PM »
Keep me posted on what you find on hood please
'93 RX-7
'04 M3 Convertible

Offline MPbdy

Re: Low profile roots blower options LS3
« Reply #6 on: March 04, 2019, 07:20:29 PM »
What if you could relocate the supercharger to the front of the engine?  Would take care of all the hood clearance issues!

Offline ZekeO

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Re: Low profile roots blower options LS3
« Reply #7 on: March 05, 2019, 08:13:15 AM »
You mean a centrifugal style?

I kinda like the low end character of the roots style
'93 RX-7
'04 M3 Convertible

Online sciff5

Re: Low profile roots blower options LS3
« Reply #8 on: March 05, 2019, 10:19:55 PM »
You mean a centrifugal style?

I kinda like the low end character of the roots style

Save money on the blower and get the most CI you can afford

Offline Exidous

Re: Low profile roots blower options LS3
« Reply #9 on: March 09, 2019, 02:12:38 AM »
I picked up an LS7 rotating assembly with billet mains for $1100. Just need a block now. My only fear is when I pick up a sleeved block, will I regret having not gone to a 440 or something. MOAR CUBES....!!!

Anyone need some really good sub 400ci heads? :-)
94 BB SBE LS1 Full Mamo top, MS3ProU with TC, RONIN 8.8 and another custom dual 2.5" stainless exhaust. Too loud, need bigger muffler....

Offline paul_3rdgen

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Re: Low profile roots blower options LS3
« Reply #10 on: March 09, 2019, 02:53:19 PM »
^ thatís a good deal!!  I think thatís where Iím heading next.  7.0l or more.  Forced induction is great but too many headaches. 


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93 RX7 R1 500rwhp
LS2, H/C combo... ARE drysump
Race Logic traction Control and 4 wheel Stoptech BBK
3.73 gears installed in the stock diff  :o

Offline gnx7

Re: Low profile roots blower options LS3
« Reply #11 on: March 29, 2019, 01:41:19 PM »
You mean a centrifugal style?

Save money on the blower and get the most CI you can afford

Agreed
425-440rwhp will put any FD into the high 10's with traction and 6speed (heads/cam/headers LS1/2)
525-550rwhp will put any FD into the high 9's with traction and 6speed (402ci+ setup with good heads/intake)

Remember that pretty much any blower with bracketry/intercooler/cooling upgrades will add 80-100lbs on the front end.... The beauty of our RX-7 swaps is the lightweight... don't really need all that power.  Mike (LS1-FD who used to frequent on here) had a 402ci setup with FAST90, ported heads/headers and a 75hp nitrous shot and it was beating our buddies 1000rwhp twin turbo '97 GTS Viper on highway pulls repeatedly without issue.

Also plan to overbuild your current cooling system as it will be inadequate if you have the Samberg radiator.

'93 FD: 441ci/AllPro LS7 heads/intake en route, T56 Mag, 8.8" IRS, HolleyHP, DavisTechTC 10.32@137mph cats/full exhaust. 165mph 1/2 mile (old LS7)
'93 FD LS9 turbo, T56 Mag, Samberg 8.8" solid axle, 9.35@163mph 197mph 1/2 mile
`69 Chevelle: alum 5.3, GTS76 turbo, ChiseledPerf A/W, T56 Magnum,Ford 35 spline 9".CTS-V interior http://www.norotors.com/index.php?topic=18234.0
old yellar....440rwhp/FD sold but not forgotten: http://www.ponycars.net/scc.htm
I sell new T56 Magnums/McLeod clutch/T56 rebuild kits/Holley EFI/FIC injectors and all BrianTooleyRacing parts.  norcalmotorsport@gmail.com

Offline Exidous

Re: Low profile roots blower options LS3
« Reply #12 on: March 29, 2019, 04:18:18 PM »
I'd be really disappointed if I owned that viper although I'd imagine there were traction issues.
94 BB SBE LS1 Full Mamo top, MS3ProU with TC, RONIN 8.8 and another custom dual 2.5" stainless exhaust. Too loud, need bigger muffler....