throttle body upgrade/swap? - SaabCentral Forums
*
Home Saab Pictures Saab Classifieds Saab Dealer Listings Saab Forum Saab Forum


Go Back   SaabCentral Forums > Saab C900, 1979-1993 & '94 Convertible (C=classic) > C900 Performance, Mods & Tuning

C900 Performance, Mods & Tuning Covers Tuning & Performance modifications for the Classic 900 (C900)

SaabCentral.com is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 22nd September 2006
kilo_tech17 kilo_tech17 is offline
Junior Member
 
Join Date: Oct 2005                                                
Location: sedro-woolley washington
My Saabs: 1979 900 turbo 2 door hatch
Posts: 8
Question throttle body upgrade/swap?

i was wondering if i would be able to swap my throttle body for a slightly larger one that would fit or would be able to fab fit? i have a 79 900 turbo. if i could get one that is larger that would fit and work would it effect the fuel injection system on the car? or would it not be worth it all the while. i plan to auto-x it this coming jan-march when the next season starts. i'm trying to think of future upgrades that i will be able to do on the car. thanks
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 22nd September 2006
Squaab99t's Avatar
Squaab99t Squaab99t is offline
Saab Lunatic
 
Join Date: Jul 2005                                                
Location: Shoreline Wa USA
My Saabs: '89 900t 4dr'78 99t'76 99 16vt'11 9-3
Posts: 1,030
Default

Welcome. Looks like you have a B motor in your 79. Every so often on Ebay a Weber TB will show up. $s. Said to be a larger dia. I have never seen one to measure. I'm pertty sure 16v TB will fit, not positive. Not sure what class you will be auto X, check the rule book on what you can change for what class. I would look for the 6 port fuel dist (2 are blanked off). adjust the boost, disable the fuel pump over boost, but remember the B head is getting very hard to find. so not too much boost Cleaning the injectors, KN drop in filter, general tune up stuff. There is a bunch to do you just need to know how to tailor it to fit the class.
Reply With Quote Quick reply to this message
  #3  
Old 22nd September 2006
sonett1 sonett1 is offline
Saab Lunatic
 
Join Date: Dec 2003                                                
Location: ?
My Saabs: ?
Posts: 1,103
Default

i am sure Group 9 or similar over there in the US used to offer throttle bodies with a larger diameter/throttle plate on an exchange basis?
Reply With Quote Quick reply to this message
  #4  
Old 22nd September 2006
ejenner's Avatar
ejenner ejenner is offline
Banned
 
Join Date: Nov 2003                                                
Location: www.saabsforum.com
My Saabs: 900 Carlsson, 99t, 99 T16, 900 t16 vert
Posts: 7,270
Default

IMO with forced induction you needn't bother enlarging anything unless your looking for serious power.

Should have a nice low compression ratio on that early motor so just up the boost, keep an eye on the knock situation and consider water injection.

Handling, suspension, brakes and tyres are probably more important.
Reply With Quote Quick reply to this message
  #5  
Old 22nd September 2006
sonett1 sonett1 is offline
Saab Lunatic
 
Join Date: Dec 2003                                                
Location: ?
My Saabs: ?
Posts: 1,103
Default

Regardless of whether your engine is N/A ot turbo, the big gains are when you get more air into the engine.
Reply With Quote Quick reply to this message
  #6  
Old 22nd September 2006
ejenner's Avatar
ejenner ejenner is offline
Banned
 
Join Date: Nov 2003                                                
Location: www.saabsforum.com
My Saabs: 900 Carlsson, 99t, 99 T16, 900 t16 vert
Posts: 7,270
Default

No doubt. but when you got a big air pump pressurising the inlet manifold you're off to a flying start. A larger throttle body is quite insignificant and so is a lot of the inlet tract. Just bump up the pressure so when the valves open air is crammed into the combustion chamber. Turbocharging is a shortcut to high performance and stock system can be tweaked. It's true that bigger spaces everywhere will allow more air through the head but higher pressure can compensate for a lack of space.
Reply With Quote Quick reply to this message
  #7  
Old 23rd September 2006
sonett1 sonett1 is offline
Saab Lunatic
 
Join Date: Dec 2003                                                
Location: ?
My Saabs: ?
Posts: 1,103
Default

All things being equal, either N/A or turbo, there still comes the point when the engine can only flow so much air, have a look at this to get an idea what i am getting at............... http://www.pumaracing.co.uk/turbo.htmMy approach to performance tuning is that with 4 stroke engines, the starting point should be with the cylinder head, without getting the head done first any other modifications relating to the engine will not be at their full potential.
Reply With Quote Quick reply to this message
  #8  
Old 23rd September 2006
ejenner's Avatar
ejenner ejenner is offline
Banned
 
Join Date: Nov 2003                                                
Location: www.saabsforum.com
My Saabs: 900 Carlsson, 99t, 99 T16, 900 t16 vert
Posts: 7,270
Default

totally agree. But an extra 50bhp above stock is no trouble at all on a forced induction system. It is important for hopeful tuners to know that it does get to a point when extra pressure in the manifold isn't producing more power. Couldn't say what that figure is but when you hear all that talk of "wow - look how high my pressue gauge reads now" that is probably the time when those extra psi's aren't doing anything.

Riding down the straight at Bruntingthorpe in the Noble M12 watching the boost gauge proved to me that pressure is pretty un-important. When I pointed out that the Noble requires something like stock T16 pressure to produce all it's power Matt Faulks said "high pressure is a sign of a restriction" which I thought was spot-on.
Reply With Quote Quick reply to this message
  #9  
Old 24th September 2006
kilo_tech17 kilo_tech17 is offline
Junior Member
 
Join Date: Oct 2005                                                
Location: sedro-woolley washington
My Saabs: 1979 900 turbo 2 door hatch
Posts: 8
Default

i have been to a couple of events and have talked to some of the managers of the chuckanut sports car club and they said i would be able to race it in the novice class, being able to upgrade suspension, shocks, intake filter, sway bars, etc but all to stock design. i already have a k&n drop filter in, i have intrax springs with newer kyb's that came on the car. one thing that i am slightly worried about is i have a 2.25 exhaust on it that isnt stock. i just hope that doesnt put me in a higher class. the water pump shaft also has broken on it that i was goin to replace with an electric pump. untill recently i found a full kit with the new shaft+impeller+seals and all. i am unsure of how far into the classes i will go with this car but i am goin to start off with it and go up utill it is more practical to change cars. i have read a bit on the puma racing site and that is a big help, thanks for that link sonett1. i will try and get pics of progress on the car and i will keep you guys informed on how i do with auto-x, thanks again
Reply With Quote Quick reply to this message
  #10  
Old 24th September 2006
ejenner's Avatar
ejenner ejenner is offline
Banned
 
Join Date: Nov 2003                                                
Location: www.saabsforum.com
My Saabs: 900 Carlsson, 99t, 99 T16, 900 t16 vert
Posts: 7,270
Default

In its day the 99 was able to win races so should be competitive for a while.

VinceT from this site competes with a 99' so you might do well to check out his website and maybe ask him some questions: http://members.shaw.ca/saaboteur

Also James from Team SaabWorks who races 99's and 900's knows a lot about competitive Saabs. His username is rally900 and his website is: http://www.saabworks.com
Reply With Quote Quick reply to this message
  #11  
Old 25th September 2006
kilo_tech17 kilo_tech17 is offline
Junior Member
 
Join Date: Oct 2005                                                
Location: sedro-woolley washington
My Saabs: 1979 900 turbo 2 door hatch
Posts: 8
Default

as far as installing a 900t intercooler, that i have with original hoses and piping, is the mechanical fuel injection able to compinsate for the cooler charge? i also saw an "upgrade" kit for the stock intercooler, the one that fits behind the driver headlight, that had new samco hoses and larger diameter piping like 2.25 or 2.5. would that also be a decient upgrade? i just dont know how it will all act with the fuel system.
Reply With Quote Quick reply to this message
  #12  
Old 26th September 2006
Saab-Daniel's Avatar
Saab-Daniel Saab-Daniel is offline
Saab Lunatic
 
Join Date: Jul 2003                                                
Location: Orlando, Florida
My Saabs: '91 Monte Carlo 'vert
Posts: 2,876
Default

No problem, an intercooler will work fine on a t8 like yours (and mine). A 9000 intercooler is a even better solution, stick it in front of the radiator, and will give you quite a nice power-upgrade.

Daniel.
__________________
Still preaching MS...!
They call him... "The Reverend"....

Now with C900 Monte Carlo Convertible, weekend-cruiser :-)
Reply With Quote Quick reply to this message
  #13  
Old 26th September 2006
ejenner's Avatar
ejenner ejenner is offline
Banned
 
Join Date: Nov 2003                                                
Location: www.saabsforum.com
My Saabs: 900 Carlsson, 99t, 99 T16, 900 t16 vert
Posts: 7,270
Default

Maybe an original 900 IC stuck in front is better than a 9k IC?
Reply With Quote Quick reply to this message
  #14  
Old 26th September 2006
Saab-Daniel's Avatar
Saab-Daniel Saab-Daniel is offline
Saab Lunatic
 
Join Date: Jul 2003                                                
Location: Orlando, Florida
My Saabs: '91 Monte Carlo 'vert
Posts: 2,876
Default

It might be, but piping is more difficult...

Daniel.
__________________
Still preaching MS...!
They call him... "The Reverend"....

Now with C900 Monte Carlo Convertible, weekend-cruiser :-)
Reply With Quote Quick reply to this message
  #15  
Old 26th September 2006
Eric van Spelde Eric van Spelde is offline
Saab Crazy
 
Join Date: Feb 2002                                                
Location: The Netherlands
Posts: 520
Default

Two 900 IC's side-to-side with custom top and bottom end tanks should be good - in all cases, be prepared to do some metal cutting. Personally I'd sooner go for a liquid/air IC system, but that's just my liking for short, simple intake tracts and dislike for structural changes...
__________________
Eric van Spelde
Turbo! Team Europe
http://geocities.com/turboteameurope

'85 900T16 "R21" conversion "Saabine"
Reply With Quote Quick reply to this message
  #16  
Old 26th September 2006
Si's Avatar
Si Si is offline
Saab on the Brain!
 
Join Date: Jan 2003                                                
Location: 5225′34″N 00152′19″W
My Saabs: Sensonic NG900T, a gagle of rusty c900's
Posts: 5,975
Default

Quote:
Two 900 IC's side-to-side with custom top and bottom end tanks should be good - in all cases, be prepared to do some metal cutting
No metal cutting nessesary, just remount the radiator




__________________
Psytuned 1997 900 Sensonic coupe turbo
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the SaabCentral Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:51 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

top of page | sitemap | email us



copyright © 2003 - 2011 saabcentral.com, All rights reserved http://www.whiter.co.uk - valid xhtml - valid css
SaabCentral is an independently run website and is not affiliated in any way to Saab Automobile AB.


Garage Plus vBulletin Plugins by Drive Thru Online, Inc.