Rotary Car Performance General Rotary Car and Engine modification discussions.

Combining Two to Make One

Old 06-09-19, 09:53 PM
  #1  
HDP
A Fistfull of Dollars!
Thread Starter
iTrader: (2)
 
HDP's Avatar
 
Join Date: Nov 2002
Location: HuntsVEGAS, AL
Posts: 5,317
Received 0 Likes on 0 Posts
Question Combining Two to Make One

I have three S4 T2 engines and one S5 NA. Is it possible to use a S4 T2 to build a S5 T2?
HDP is offline  
Old 06-10-19, 10:18 AM
  #2  
Armchair engineer
iTrader: (2)
 
j9fd3s's Avatar
 
Join Date: Mar 2001
Location: http://www.k2rd.com
Posts: 24,606
Likes: 0
Received 124 Likes on 113 Posts
no, but just built a nice S4 T2 engine, its almost the same thing...
j9fd3s is offline  
Old 06-10-19, 12:10 PM
  #3  
HDP
A Fistfull of Dollars!
Thread Starter
iTrader: (2)
 
HDP's Avatar
 
Join Date: Nov 2002
Location: HuntsVEGAS, AL
Posts: 5,317
Received 0 Likes on 0 Posts
Originally Posted by j9fd3s View Post
no, but just built a nice S4 T2 engine, its almost the same thing...
Almost? Can you explain?
HDP is offline  
Old 06-11-19, 01:31 PM
  #4  
32psi+
iTrader: (42)
 
Copeland's Avatar
 
Join Date: Sep 2006
Location: Raleigh, NC
Posts: 1,219
Received 7 Likes on 7 Posts
Some of the components could be swapped between the motors, but you would not have a S5 T2 motor with this combination of parts.

A better use of time and money would be to run more boost on a nice S4 T2 motor. The power difference between the factory S5 T2 and S4 T2 is very minimal in the grand scheme of things and could almost be attributed to the difference in factory boost.

Last edited by Copeland; 06-11-19 at 01:34 PM.
Copeland is offline  
Old 06-12-19, 01:12 PM
  #5  
Dak
Information Regurgitator
 
Join Date: Feb 2001
Location: Sparta TN. United States
Posts: 1,287
Received 15 Likes on 12 Posts
Riddle me this? Eventually a person will reach a point power wise that the stock turbo needs to be modified( say BNR stage 1 or 2 for example) or replaced by a different turbo and moving to a standalone ecu. At this point does starting with a S5 really matter as much anymore?
Dak is offline  
Old 06-12-19, 03:30 PM
  #6  
malignant narcissist
iTrader: (2)
 
diabolical1's Avatar
 
Join Date: Feb 2002
Location: FL
Posts: 9,495
Received 59 Likes on 55 Posts
Originally Posted by HDP View Post
Almost? Can you explain?
meaning it's was built for turbocharging, and all things being equal, you will likely make roughly the same power with the S4. taking everything else out of the equation, your main differences are the rotors (compression and weight), spark plug locations and some block reinforcements from the factory.

Originally Posted by Dak View Post
Riddle me this? Eventually a person will reach a point power wise that the stock turbo needs to be modified( say BNR stage 1 or 2 for example) or replaced by a different turbo and moving to a standalone ecu. At this point does starting with a S5 really matter as much anymore?
i have a hankering feeling that this was all rhetorical, but i will offer my input anyway.

in theory, it does/should matter, but not much beyond your confidence in the parts you've chosen to build the car (as a whole) with, said factory reinforcements and the tuner's abilities. to put it another way, if you're just building a nice, fast car for the street, i honestly don't think it matters much which block you use. however, if you start out with specific goals in mind though (power, abuse, etc.) then it only makes sense to start with the latest series block you can get your hands on.
diabolical1 is offline  
Old 06-12-19, 10:54 PM
  #7  
Dak
Information Regurgitator
 
Join Date: Feb 2001
Location: Sparta TN. United States
Posts: 1,287
Received 15 Likes on 12 Posts
Originally Posted by diabolical1 View Post
i have a hankering feeling that this was all rhetorical, but i will offer my input anyway.

in theory, it does/should matter, but not much beyond your confidence in the parts you've chosen to build the car (as a whole) with, said factory reinforcements and the tuner's abilities. to put it another way, if you're just building a nice, fast car for the street, i honestly don't think it matters much which block you use. however, if you start out with specific goals in mind though (power, abuse, etc.) then it only makes sense to start with the latest series block you can get your hands on.
Somewhat rhetorical but looking for confirmation my thinking is correct in that if he builds a S4 because that's what he's got, when/if he upgrades the turbo and does supporting mods later it won't really matter that he didn't start with a S5. Spend some of the money that would've been spent on a S5 having the wastegate ported since that seems to be one of the benefits to the S5 turbo.

On a side note: how much more hp does the extra reinforcement on the S5 allow?
Dak is offline  
Old 06-19-19, 09:24 PM
  #8  
malignant narcissist
iTrader: (2)
 
diabolical1's Avatar
 
Join Date: Feb 2002
Location: FL
Posts: 9,495
Received 59 Likes on 55 Posts
Originally Posted by Dak View Post
On a side note: how much more hp does the extra reinforcement on the S5 allow?
it doesn't seem to be as cut and dry as your question, but the number/range i would feel comfortable accepting is 100 to 150, stock for stock, at the wheels.

S4 Limit Thread

S5 Limit Thread
diabolical1 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
HDP
Other Engine Conversions - non V-8
0
06-09-19 09:49 PM
kensin
3rd Generation Specific (1993-2002)
5
10-26-17 04:21 PM
jacobcartmill
Build Threads
155
10-16-17 07:09 PM
John Huijben
Rotary Car Performance
31
02-16-12 05:02 PM
Bryon
2nd Generation Specific (1986-1992)
1
10-19-05 03:58 PM


Thread Tools
Search this Thread
Quick Reply: Combining Two to Make One


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: