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Old 02-17-2006, 09:44 AM   #1
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Swapping a V6 for a 4 cyl?

Anybody know if this is an easy swap? Or will I need to change trannys too?
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Old 02-17-2006, 09:53 AM   #2
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pretty sure the trannys will need to be swapped. What type of tran is in thier now. I want to say the V6 used the f28 5spd and the 4cyls used the F25...but I am not 100 percent sure.

Probably just have to change the engine wiring harness, and the ECU as well as getting all the engine mounts for the 4cyl and the accesories as well just to minimize hassle.

What are you scheming anyway?
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Old 02-17-2006, 10:06 AM   #3
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Twin turbo Saab? Mmmmm that would be pure sex.
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Old 02-17-2006, 10:07 AM   #4
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Quote:
Originally Posted by WyldSaabMan
pretty sure the trannys will need to be swapped. What type of tran is in thier now. I want to say the V6 used the f28 5spd and the 4cyls used the F25...but I am not 100 percent sure.

Probably just have to change the engine wiring harness, and the ECU as well as getting all the engine mounts for the 4cyl and the accesories as well just to minimize hassle.

What are you scheming anyway?
Dont both the F28 and F25 use standard GM FWD mounting though?
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Old 02-17-2006, 10:17 AM   #5
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Twin turbo Saab? Mmmmm that would be pure sex.
LMAO - get real - not with the 2.5 or those 3.0 hunks of crap. The 2.8 is the ideal engine for twin turbo - especially since GM has everything you need to bolt on to build your own 9 second "race car." I have a GM performance book with ALL the options the GM engine line up's have for upgrade factory bolt ons. (ECOTECH MODS)

I wanna find a 9-5 with a blown engine and do a powertrain swap - same frame and mounts! (cept the upper)
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Old 02-17-2006, 10:19 AM   #6
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Quote:
Originally Posted by mattlach
Dont both the F28 and F25 use standard GM FWD mounting though?
hmm I think your right lol...I didnt really thiink of that when I typed it out. But I am sure gear ratios are probably differnt, or atleast the final drive ratio
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Old 02-17-2006, 10:19 AM   #7
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Originally Posted by BurnsSide42
I wanna find a 9-5 with a blown engine and do a powertrain swap - same frame and mounts! (cept the upper)
A 9 second car...

with FWD...


Might was well replace the entire drivetrain and put a RWD IRS setup in it.
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Old 02-17-2006, 10:20 AM   #8
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Originally Posted by WyldSaabMan
hmm I think your right lol...I didnt really thiink of that when I typed it out. But I am sure gear ratios are probably differnt, or atleast the final drive ratio

You are probably right about that...

Tell us more about your plans tweek!
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Old 02-17-2006, 10:22 AM   #9
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Originally Posted by mattlach
A 9 second car...

with FWD...


Might was well replace the entire drivetrain and put a RWD IRS setup in it.
All bolt on shit from GM dude - that includes a mean limited slip for the transaxle unit - and serious slicks. The 4 banger ecotech was running 9.6's with all GM factory bolt on crap man - i am dead serious. (all internals stay the same - good up to about 800hp) so they say...
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Old 02-17-2006, 10:29 AM   #10
 
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Quote:
Originally Posted by mattlach
A 9 second car...

with FWD...

You mean like these FWD cars running close to it? http://www.nordictuning.com/main.php...port=m_gallery
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Old 02-17-2006, 10:34 AM   #11
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You mean like these FWD cars running close to it? http://www.nordictuning.com/main.php...port=m_gallery
It's physically possible but its a scary ride...

A FWD chassis just isnt set up for that...
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Old 02-17-2006, 10:51 AM   #12
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Do you think it might be possible that he wants to set up a six cylinder and drive train to power all four wheels?
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Old 02-17-2006, 10:58 AM   #13
 
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Going straight and fast really isn't that much of an issue...

FWD is really only sketchy when you're heading into a corner fast, braking, turning, and accelerating out of it. FWD just asks a lot of the front wheels all at the same time and basically makes the driver work a lot harder. A really good driver can make a FWD equal or outperform a lot of RWD/AWD cars (Examples: various European touring car races; MTAERO on Saabnet is a driving instructor who often uses his 9000 Aero or Viggen at track events to show Porsche drivers how to really drive; Paul Kalinoski of Automotion in Billerica races his 9000 regularly in NEw England. Last year, he took second in his division, with first taken by a specially prepped BMW M3)

You need to brake slightly earlier to anticipate the turn-in point, then ensure you get the car settled before powering out of the corner. You can be a lot less precise with RWD because you can throttle steer, and sloppier still with AWD....

With FWD, a limited-slip differential helps ENORMOUSLY by limiting wheel spin by applying torque to the wheel with the most traction. It makes the car really track when existing corners.

If you want a quick demonstration, experiment with an accurate driving sim like GT4 or Forza Motorsport. The cars are programmed with the stock weight and handling characteristics.
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Old 02-25-2006, 08:39 AM   #14
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fwd is fine to go any speedyou want, just set it up correctly.
I have personally seen some fwd running low 10s in person at the strip. Its not hard with a good car and a good setup. BTW it was a civic that i saw at the track run this with boost over and over.
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Old 02-25-2006, 08:54 AM   #15
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Actually a buddy at work and I was going to try and snag a 95 SE with bend valves so I assumed it was V6.

We were going to try and put in a used engine and re-sell it but they never called back. They only wanted like $700 for the car.
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