Project: Drag Classic 900 [Archive] - SaabCentral Forums

: Project: Drag Classic 900

7th July 2009, 03:20 PM
hello everyone! i dont generally surf this forum but i thought i would start a project tread of my C900 that's making a transformation into a drag car. the car started off as a 1990 C900 SPG Talladaga red that i picked up for $300. the car is not perfect but it doesn't have to be. the car has been an on going project that has just been slowed due to the birth of my beautiful baby girl. but its not big of a deal... i guess but heres some pics of the current transformation.

pics of when i first got it home

Ya! standalone Ecu MegaSquirt V2.2 MSnS Extra fuel only for the moment

ok time for some more power...

Time for Ignition, at first i was going to do EDIS control ignition then i found out that you cant run all that fun stuff like launch control of flat shift with EDIS. so i decided to go the wastespark MS controlled route witch is more difficult but in my case its worth it..

7th July 2009, 03:23 PM
heres some other fun bits..

right now iam concentrating on making the car lighter..

Earth Brown
7th July 2009, 04:12 PM
I love the car, but why on earth was there a "Natural Ice" can in your possession?


7th July 2009, 05:40 PM
You're gearbox is gonna explode into soooo many pieces! :o

I would seriously suggest beefing that up as the abolsute first port of call if you are drag racing, everything else is a waste of time if you shred the cogbox coming off the line (which you will!)

Not to dampen you spirits or anything, you clearly look like your getting well into the job, which is great, but honestly the Saab gearboxes are made of swiss cheese and thrashing off the line in 1st and 2nd is a guaranteed way to end them (particularly with a turbo that big)

The Saab Gearbox shifts like crap as well, you can't rush the gearchanges which again isn't really handy for drag racing.

If you have the engine out and turn it round 180 degrees I understand an Audi gearbox can be made to fit the flywheel end, get one from a quattro and you could have 4 wheel drive like this guy..

8th July 2009, 07:29 AM
yes i realize the gear box issue but my next project will like be an audi 90 quattro drive train or a T5 trans, half backed ford 9" rear end both saab powered

8th July 2009, 02:08 PM
Great to see someone with a holset.:cool:

Heres some inspiration for ya.

8th July 2009, 02:20 PM
Great to see someone with a holset.:cool:

Heres some inspiration for ya.

ive seen that video i wish i could find out more about the car..... that will be me hopefully haha even if its just one run haha

18th August 2009, 09:04 AM
got my launch control and flat shift option up and running here a couple videos

in car

out side of the car

23rd August 2009, 06:41 PM
You are a sick man and I love it.
Just take it easy on first gear......but you have already heard careful.

24th August 2009, 10:18 AM
i have some #6 primarys so iam thinking if i can put those in and launch it in 2cd gear. with a TON of slipping the clutch i'll have to see how it works out

17th September 2009, 08:40 AM
more weight loss

now i got to make mounts for the gauges and stuff

6th October 2009, 07:32 PM
Is your turbo oil cooled or water cooled?

just curious as my car is still smoking (it went away, but then came back after a short 5 min drive, going easy on it) and i have an oil cooled turbo.

7th October 2009, 07:43 AM
its just oil cooled. if i do some hard pulls i just give the turbo some time to cool down

7th October 2009, 11:17 AM
I always thought the best option for running drag type races was an automatic? It's been forever since I've looked at all, but i could've sworn a 3 speed auto was the preferred choice.

9th November 2009, 09:05 PM
set up the rear suspention

11th November 2009, 11:51 PM
I wish i had as many cut up logs as you have

12th November 2009, 07:10 AM
I wish i had as many cut up logs as you have

hahaha thats nothing... theres more...

12th November 2009, 11:31 AM
you dont need those SPG vent covers....send them my way man!!!!

13th November 2009, 08:30 AM
1: Love the car! cant wait to see more

2: Anyone got any info on the audi gearbox swap?

4th January 2010, 08:32 AM
got the FMIC installed its a 9-5 intercooler its not the best route, but it will do what i need it to do.

4th January 2010, 10:36 AM
Lookin good......I wondered where this went.

4th January 2010, 11:51 AM
Lookin good......I wondered where this went.

thank you!
haha still in my drive way just limited on time so it takes a while to get stuff done :cry:

5th January 2010, 12:10 AM
Nice job on the intercooler. Do you have any plans to beef up the tranny?

5th January 2010, 07:08 AM
thats actually exactly what i want to do to the trans! do you have any more info on that trans?

5th January 2010, 08:44 PM
Can a transmission really be reinforced like this??? If so, a welding I will go!

9th January 2010, 12:08 AM
spgeebee88 Thats actually exactly what i want to do to the trans! do you have any more info on that trans? I found this picture a while ago (I think on saab turbo club of sweden) and besides the mods you can see like; steel side panel cover and steel inner drivers; I'm not sure what was done. Sorry.

Tailspin Can a transmission really be reinforced like this??? If so, a welding I will go! I really don't know anything about welding, but one time I was given some advice on welding cast aluminum (c900 tranny cases are made of) and what he said is that it is important to pre-heat the aluminum possibly putting into a stove. Then weld it while it's hot and after your done welding put it back in the oven and slowly turn down the oven until off.

10th January 2010, 02:14 AM
I'd use an oxy acetylene rig and just preheat with the torch. Gotta be really careful not to spend too much time on one spot or another spot will cool off and the metal will warp! That would be my main concern if I were putting that much heat onto a casing of very tight tolerance parts. Its sort of like spinning plates, you gotta put more plates up while still going back to tend to the ones that are wobbling off.

4th February 2010, 11:09 AM
realy nice
i hope one day i go so fast like u :)

5th February 2010, 08:33 AM
got the FMIC on with the bumper gutted and fitted shes getting there....

12th February 2010, 11:38 AM
picked up a Alicohol injection kit should be installing that soon

27th October 2010, 11:26 AM

6th November 2010, 08:38 AM
The ideal setup for drag is what I have on my 99.

I've got type-7 primary drive combined with a 4-speed gearbox. You could go more extreme and fit type-8 primaries. It is the same reason why someone else mentioned the 3-speed auto earlier. If you are trying to do a quick quarter mile then having to change gear often will wreck your time. The type-7's are a strain on my clutch but I've got a light car and the 2.3t clutch from the 1992 Saab 9000 2.3 turbo which is the biggest you can get with standard saab parts. To get off the line fast you need to keep the revs high and slip the clutch slightly. You wouldn't do that for every pull-away but if you are racing off the lights or whatever then a bit of slip helps you get moving quickly but you will smell the clutch burning so not the best thing to do for every day driving. You could use type-8 primaries and I think from the way it feels with type-7's it would probably work alright. With the type 8's you should be able to get just over 60mph in first.

The next useful thing is to increase the rev limit. That is not as simple as it sounds however. You need to do something to keep the power going to the new red line. I've only just changed to the correct turbo cam for my car (I was using n/a cam and it was rubbish) so not sure exactly what's required just yet. The further you can increase the useful rev range the longer you can stay in each gear. If you didn't change past 2nd before you crossed the line then that would be just one gear change... but unlikely to be that long-legged. More likely you will be in 3rd as you cross the line. The 11sec car in the video earlier was doing 120mph as it crossed the line.

If you are only using the gearbox for a few runs then it should be alright without too much extra strengthening. Especially if the gearbox does not heat up too much, you are minimising wheelspin (because obviously the time will be slower if you spin the wheels) and if the car is only going in a straight line. Under those controlled conditions the gearbox should last for quite a while. A rebuilt one would last even longer. Especially if you do new bearings. Syncromesh would be the first problem I think. Then probably flexing and eventually the actual strength of the gears themselves.

9th November 2010, 11:08 AM
hey guys!

thought i would stop by for an update, i abandoned the idea of drag racing a C900 for obvious reasons, and also over the past year ive been Autoxing alot and ive fallen in love with it! so i decided to make her a dedicated Autox'er. i got the car on the road and have been trying to work out the bugs. i've also got a ton of parts that got to go on the car, Koni's, powerflex bushings, ball joints, EWG, and some other stuff

9th November 2010, 01:32 PM
Well drag racing is very expensive. Not to say other forms of motorsport can't be the same or more... but with drag racing because there are so few variables in order to be competitive it is a lot more about money and a lot less about driving skill or luck. With the autocross someone with all the money in the world and the best car on the day loaded up with all the best gear could roll it on the first corner and end up out of the competition straight away. With drag racing that is much less likely to happen so it becomes an all-out spend-fest instead. More money on stronger parts and better technology will get you a better time.

9th November 2010, 01:57 PM
i think thats what brought me to Autox that come to love 90% driver 10% car, and i dont have all the money in the world haha

29th November 2010, 07:50 AM
got any close-ups of the bonnet vents?

21st December 2010, 11:29 AM
freshening up the front end,

Afco racing springs

some rust repair

21st December 2010, 02:52 PM
!!!! good luck !

If you want some preformed steel part