Forced Induction Superchargers | Turbochargers | Intercoolers

S91 vs. GT55-91

Thread Tools
 
Search this Thread
 
Old 01-01-2007, 12:47 PM
  #21  
LS1TECH Sponsor
iTrader: (3)
 
DrTurbo's Avatar
 
Join Date: Mar 2006
Posts: 3,966
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by 509TURBOFIREHAWK
Dr T, what backing plate are you guys using on the S95, is it the steel on like the Garrett's or can you put an aluminum on there to save a little weight?
The backing plates are steel since the center section is one piece. Unit weighs about the same as a standard thumper.

Also an S95 will make 200-300hp more then a GT55.
Old 01-02-2007, 11:28 AM
  #22  
Teching In
Thread Starter
 
509TURBOFIREHAWK's Avatar
 
Join Date: Dec 2006
Posts: 32
Likes: 0
Received 0 Likes on 0 Posts
Default

Dr T, What is the weight of the S95's?
Old 01-02-2007, 12:05 PM
  #23  
LS1TECH Sponsor
iTrader: (3)
 
DrTurbo's Avatar
 
Join Date: Mar 2006
Posts: 3,966
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by 509TURBOFIREHAWK
Dr T, What is the weight of the S95's?
Same basic weight of a thumper. Most are about 70lbs or so.
Old 01-02-2007, 02:15 PM
  #24  
TECH Senior Member
iTrader: (15)
 
V6 Bird's Avatar
 
Join Date: Nov 2001
Location: Grand Prairie, TX
Posts: 5,109
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by DrTurbo
Same basic weight of a thumper. Most are about 70lbs or so.
so ideally a 370-388 would put a 370 ci in its efficiency range spinning it to 7500 shift points?
Old 01-02-2007, 06:52 PM
  #25  
LS1TECH Sponsor
iTrader: (3)
 
DrTurbo's Avatar
 
Join Date: Mar 2006
Posts: 3,966
Likes: 0
Received 2 Likes on 2 Posts
Default

With a turbo that big, yes you will need some RPM's to get things efficient.
Old 01-03-2007, 09:14 AM
  #26  
TECH Senior Member
iTrader: (15)
 
V6 Bird's Avatar
 
Join Date: Nov 2001
Location: Grand Prairie, TX
Posts: 5,109
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by DrTurbo
With a turbo that big, yes you will need some RPM's to get things efficient.
I dont want a 400 CI motor. So with out too much RPM what CI would be ideal 7500 - 8000 rpm is all i want to spin and still be able to drive it on the street every once and awhile.
Old 01-03-2007, 09:58 AM
  #27  
TECH Resident
iTrader: (20)
 
FormulaFire's Avatar
 
Join Date: Sep 2004
Posts: 988
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by V6 Bird
I dont want a 400 CI motor. So with out too much RPM what CI would be ideal 7500 - 8000 rpm is all i want to spin and still be able to drive it on the street every once and awhile.

You could do it with a well built 391.. I'd say.. atleast I'm thinking about trying it with one
Old 01-03-2007, 11:06 AM
  #28  
LS1TECH Sponsor
iTrader: (3)
 
DrTurbo's Avatar
 
Join Date: Mar 2006
Posts: 3,966
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by V6 Bird
I dont want a 400 CI motor. So with out too much RPM what CI would be ideal 7500 - 8000 rpm is all i want to spin and still be able to drive it on the street every once and awhile.

A very good high flowing 370-380ci engine would work well. The heads will be the key. With an efficient enough head you will be able to move more air at a lower RPM.
Old 01-03-2007, 11:25 AM
  #29  
TECH Senior Member
iTrader: (15)
 
V6 Bird's Avatar
 
Join Date: Nov 2001
Location: Grand Prairie, TX
Posts: 5,109
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by FormulaFire
You could do it with a well built 391.. I'd say.. atleast I'm thinking about trying it with one
It will flow very well in the head dept.

So im still likeing the 370ci basement.
Old 01-03-2007, 11:33 AM
  #30  
LS1TECH Sponsor
iTrader: (3)
 
DrTurbo's Avatar
 
Join Date: Mar 2006
Posts: 3,966
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by V6 Bird
It will flow very well in the head dept.

So im still likeing the 370ci basement.

Sounds like a good setup then
Old 01-03-2007, 11:56 AM
  #31  
TECH Enthusiast
iTrader: (13)
 
PHIL H's Avatar
 
Join Date: Nov 2001
Location: KS
Posts: 565
Likes: 0
Received 0 Likes on 0 Posts

Default

Have there been many failures of GT55-91's in twin applications? I know i havent heard of Lynch having any problems with his so far..
Old 01-03-2007, 01:04 PM
  #32  
LS1TECH Sponsor
iTrader: (3)
 
DrTurbo's Avatar
 
Join Date: Mar 2006
Posts: 3,966
Likes: 0
Received 2 Likes on 2 Posts
Default

The GT55's are not going to hold up under extended abuse. The bearing structure on them is a little small for the size. That is why you see some of the DR cars not running them anymore. Pedaling it will kill the thrust.
Old 01-03-2007, 01:56 PM
  #33  
Teching In
Thread Starter
 
509TURBOFIREHAWK's Avatar
 
Join Date: Dec 2006
Posts: 32
Likes: 0
Received 0 Likes on 0 Posts
Default

Dr T, is there anything to the new bearing systems that Innovative has, there the Super Duplex and F2, Just curious as to what they are and how they compair to whats allready out there? I havent seen any info about them. Im not a big fan of the Innovative stuff, but it is interesting.
Old 01-03-2007, 02:01 PM
  #34  
TECH Enthusiast
iTrader: (13)
 
PHIL H's Avatar
 
Join Date: Nov 2001
Location: KS
Posts: 565
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by DrTurbo
The GT55's are not going to hold up under extended abuse. The bearing structure on them is a little small for the size. That is why you see some of the DR cars not running them anymore. Pedaling it will kill the thrust.
I also see Lynch not running a BOV. Is that hard on them also? What turbo do you offer with similar power levels and spooling capibillity?
Old 01-03-2007, 02:20 PM
  #35  
LS1TECH Sponsor
iTrader: (3)
 
DrTurbo's Avatar
 
Join Date: Mar 2006
Posts: 3,966
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by 509TURBOFIREHAWK
Dr T, is there anything to the new bearing systems that Innovative has, there the Super Duplex and F2, Just curious as to what they are and how they compair to whats allready out there? I havent seen any info about them. Im not a big fan of the Innovative stuff, but it is interesting.
As far as I know, the bearings are a little more durable, but that is pretty much it. They still use standard UTV garrett wheels.

Jose knows more about this then I do. Jose and Jason are working with some of the bearing companies to engineer some for the S-series.
Old 01-03-2007, 02:36 PM
  #36  
LS1TECH Sponsor
iTrader: (3)
 
DrTurbo's Avatar
 
Join Date: Mar 2006
Posts: 3,966
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by PHIL H
I also see Lynch not running a BOV. Is that hard on them also? What turbo do you offer with similar power levels and spooling capibillity?
He's running alky now


Running without BOV's is not a good idea, but since they are automatic cars they will live longer. Most guys run BOV's though, but they are hidden or on the inside of the car on the intercooler itself, which I think is where Lynch has his mounted.


Old 01-03-2007, 05:08 PM
  #37  
TECH Enthusiast
iTrader: (13)
 
PHIL H's Avatar
 
Join Date: Nov 2001
Location: KS
Posts: 565
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by DrTurbo
He's running alky now


Running without BOV's is not a good idea, but since they are automatic cars they will live longer. Most guys run BOV's though, but they are hidden or on the inside of the car on the intercooler itself, which I think is where Lynch has his mounted.


I keep hearing that he is switching to alky, but others close to him deny it..Must be top secret!!
Old 01-03-2007, 06:15 PM
  #38  
Teching In
Thread Starter
 
509TURBOFIREHAWK's Avatar
 
Join Date: Dec 2006
Posts: 32
Likes: 0
Received 0 Likes on 0 Posts
Default

I think in that picture, those are GT47's. Dont the GT47's have six blades, and the GT55's have 7 blades on the compressor wheel?

I wouldnt want to run any of the Innovative stuff, I was just curious about those bearing systems, as if you read on there site, you would think it the best thing since sliced bread.

I tell ya what as soon as I get these two Y2K's ive got for sale gone, Im going to ride over to you guys and pick me up a pair of those S95's as soon as I can.
Old 01-03-2007, 07:27 PM
  #39  
TECH Senior Member
iTrader: (21)
 
NA$TY-TA's Avatar
 
Join Date: Aug 2002
Location: San Antonio, TX
Posts: 10,333
Likes: 0
Received 1 Like on 1 Post

Default

Dr Turbo..... When ya get a chance ask JZ what the price will be to step up to the 91mm unit in my S88 i have now.......
Always gotta have a back-up.. LOL
Old 01-03-2007, 07:47 PM
  #40  
LS1TECH Sponsor
iTrader: (3)
 
DrTurbo's Avatar
 
Join Date: Mar 2006
Posts: 3,966
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by 509TURBOFIREHAWK
I think in that picture, those are GT47's. Dont the GT47's have six blades, and the GT55's have 7 blades on the compressor wheel?

I wouldnt want to run any of the Innovative stuff, I was just curious about those bearing systems, as if you read on there site, you would think it the best thing since sliced bread.

I tell ya what as soon as I get these two Y2K's ive got for sale gone, Im going to ride over to you guys and pick me up a pair of those S95's as soon as I can.
GT47's do have 6 blade comp wheels and GT55's have 7 blade comp wheels. S95's have the new 8 blade ETT design. Below is a picture of all 3 compressor wheels. You'll see why the S95 flows so much air.

Left to right..... GT55, GT47, S95
Attached Thumbnails S91 vs. GT55-91-gt55wheel.jpg   S91 vs. GT55-91-gt47wheel.jpg   S91 vs. GT55-91-s95.jpg  


Quick Reply: S91 vs. GT55-91



All times are GMT -5. The time now is 09:59 PM.