Running the numbers I see first gear is similar to my Getrag with the 3.94 final ratio gear. Somewhat low. OK when I had just the 2.8 but now that I have the Stage II turbo I wish I had the 3.61. The more horse power you have the taller you want the gears.
maybe true maybe false. Depends on if the red line stays the same. The DOHC engines with 7,000+ RPM red lines would LOVE a first gear like that. If you have a high HP engine and don't raise the red line.........well then you are screwed with a first gear like that.
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10:42 PM
Sep 30th, 2005
Capt Fiero Member
Posts: 7657 From: British Columbia, Canada Registered: Feb 2000
If it can handle more power than the Getrag this might be a good thing for the guys that want to kill the wheel gap. You could stuff in some rather tall tires, like 225/60/16 or up to 225/30/22's which will give you pretty much no wheel gap and extend each gear out.
(yes you can fit a 22" rim on a fiero just need to use an ultra low pro tire)
Even with a dumb low 1st I am sure with a large enough tire you can make up for it.
------------------ 85GT 5spd MSD Everything,4.9 With Nitrous. www.captfiero.com
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01:37 AM
Rickady88GT Member
Posts: 10648 From: Central CA Registered: Dec 2002
If it can handle more power than the Getrag this might be a good thing for the guys that want to kill the wheel gap. You could stuff in some rather tall tires, like 225/60/16 or up to 225/30/22's which will give you pretty much no wheel gap and extend each gear out.
(yes you can fit a 22" rim on a fiero just need to use an ultra low pro tire)
Even with a dumb low 1st I am sure with a large enough tire you can make up for it.
maybe true maybe false. The first to second shift could lower the RPM's to low if you try to make up the difference with tire diameter. In the end you could still be just as "slow" 0 to 60. The low first gear is made for heavy cars so they feel quick off the line. A very low first gear will get the car moving quickly, and that might sell cars after test drives. It is more of a "gimmick" than a real performance gear ratio.
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01:56 AM
Madess Member
Posts: 2040 From: Cincinnati, OH Registered: Feb 2004
I think the low gear ratio works fine for at least the 3.9 - now other engines I don't know. When I drove it, it seems to work well because unlike a lot of the motors we use - 350, 2.8, 3.4 pushrod, this motor has nice torque and it ran its power up into the higher rmps nicely by breathing well.
speed wise first gear could have been a little better, because it topped out at about 25, 26 miles an hour, though second was nice, because I hit the rev limiter and got it a little over 60.
[This message has been edited by Madess (edited 09-30-2005).]
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08:25 AM
Rickady88GT Member
Posts: 10648 From: Central CA Registered: Dec 2002
I think the low gear ratio works fine for at least the 3.9 - now other engines I don't know. When I drove it, it seems to work well because unlike a lot of the motors we use - 350, 2.8, 3.4 pushrod, this motor has nice torque and it ran its power up into the higher rmps nicely by breathing well.
speed wise first gear could have been a little better, because it topped out at about 25, 26 miles an hour, though second was nice, because I hit the rev limiter and got it a little over 60.
For a contrast, my 3.5 Short Star has a 4 speed auto 4T65E. It's first gear is good for about 55mph. Second gear is good for 112mph (verified). The gearing is WAY to high for my taste. I would love a manual tranny with the first to second gear shift at about 35mph.
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12:41 PM
Alex4mula Member
Posts: 7403 From: Canton, MI US Registered: Dec 1999
Pardon my ignorance. How can we make this setup to work in our cars?
It will probably be very close to the hydraulic throwout bearing setup that has already been used several of the FWD Getrags. Here is a 93 Getrag setup in a SBC fiero:
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10:06 PM
Oct 1st, 2005
Formula88 Member
Posts: 53788 From: Raleigh NC Registered: Jan 2001
It will probably be very close to the hydraulic throwout bearing setup that has already been used several of the FWD Getrags. Here is a 93 Getrag setup in a SBC fiero:
interesting, I have never seen this setup before. Pardon my ignorance as well, but out of what car did this tranny come? Also, how do you bleed the clutch?
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08:12 AM
fieroguru Member
Posts: 12299 From: Champaign, IL Registered: Aug 2003
interesting, I have never seen this setup before. Pardon my ignorance as well, but out of what car did this tranny come? Also, how do you bleed the clutch?
It came from a 93 Cavalier with 3.1. This particular tranny was offered from 92-94 and there is an even newer version with the hydraulic throwout bearing setup as well. I know of two SBC fieros running this setup. Mine is one, and John Lucas (not on Forum) from Lafette IN is the other and he is running the later model setup.
To bleed it, there is a bleeder screw on the end of the 2nd line in the pic (the one on the right).
To hook it up to the fiero hard line, the bullbe flare must be cut off and the hard line reflared like a brake line. Then a flare to flare coupler connects the old fiero line to the hydraulic throwout bearing.
[This message has been edited by fieroguru (edited 10-01-2005).]
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11:01 AM
Madess Member
Posts: 2040 From: Cincinnati, OH Registered: Feb 2004
is it harder or easier to bleed than a normal Fiero clutch?
I think it is easier since the throwout bearing is much lower then the bleeder screw so it is almost impossible for air to get trapped during the bleeding process.
On the Fiero the slave is horizontal and air can get trapped while bleeding if the slave is not level or slightly higher on the drivers side.
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04:10 PM
helmet1978 Member
Posts: 743 From: Boise, Idaho, USA Registered: Nov 2001
Well, the winning bid was by someone going by "rchee"...sounds kind of familiar.
Let's hope he's paying airfreight for that engine and gets to work on it right away. Otherwise, I suspect many of us will be developing ulcers in anticipation.
Archie, is it in yet? Ha ha!
Beno
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12:47 AM
PFF
System Bot
v8fiero400 Member
Posts: 963 From: Houston,TX,USA Registered: Jan 2004
sheeze. I wonder how much a chung of aluminum large enough for a spacer/adaptor 2" thick will cost
It's good to see that you've got your thinking hat on right now. However, your a little Bass Ackwards in in your thinking. Remember, I'm mounting the transmission into a Fiero, not the engine. After all, I don't do no 6 bangers.
Archie
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11:16 PM
Russ544 Member
Posts: 2136 From: S.W. Oregon Registered: Jun 2003
It's good to see that you've got your thinking hat on right now. However, your a little Bass Ackwards in in your thinking. Remember, I'm mounting the transmission into a Fiero, not the engine. After all, I don't do no 6 bangers.
Archie
LOL... O ya.. I forgot................. it just that: "Archie does enging swaps into Fieros", so it is hard to think in terms of you doing a trans swap So I wonder how much a 2" thick flywheel for a SBC will cost A nice dual disk setup might work out well there however.
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11:38 PM
PFF
System Bot
Raydar Member
Posts: 40912 From: Carrollton GA. Out in the... country. Registered: Oct 1999
BTW Archie, does that trans require a pilot bushing in the crank? how many teeth on the 6 flywheel? how large is the hub/bolt circle on the 6 crank? possible to redrill the flywheel for the sbc or?
[This message has been edited by Russ544 (edited 10-08-2005).]
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12:22 AM
Fierobsessed Member
Posts: 4782 From: Las Vegas, NV Registered: Dec 2001
The big news of the day is that the 3.9 has a Dual-Mass Flywheel.
That's a very significant development, it will be an issue for engine or transmission swaps.
I'll give you some time to figure out if that's a good thing or bad thing & why.
Does anyone know if the 3.9 is internally balanced?
Archie
I see it as a good thing. There is more room for clutch and flywheel, that can only be good. However I could see it being an issue if that clutch/flywheel room is at an expense of additional overall transmission length. As far as you are conserned, since the SBC flywheel hub on the back of the crank already sticks out alittle, this is space gained just where you might need it, so you can fit something inside the bellhousing as opposed to adding thickness to the adaptor plate.
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12:32 AM
crash1369 Member
Posts: 326 From: Tobyhanna, PA, USA Registered: Sep 2005
this is getting to advanced for me so im just going to wait for the post that says fiero g6 tranny kit. archie just tell me how much of my money your going to take to get the g6 tranny hooked to a good v8
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12:42 PM
Formula88 Member
Posts: 53788 From: Raleigh NC Registered: Jan 2001
Dual Mass flywheel provides more depth within the tranny bellhousing. This is bad if it causes an overall engine/tranny width issue, but good (more clutch room) if it does not.
The Dual Mass Flywheel also means there are no springs in the clutch disk. So to swap with a standard non-dual mass flywheel (most Fiero engines - stock or otherwise) you would need a clutch with springs or go with a solid hub and loose some smoothness. Are the input shaft splines the same as anything else or are they a 1 off. Same is good, 1 off makes it more challanging.
The added depth is also a plus if you consider the possiblity of using a thinner adapter plate for the SBC which will make more room for those wanting to utilize the stock SBC water pump in its stock position, not to mention if there is enough room to fabricate a modified plate that will allow the tranny to fit flush against the engine bellhousing surface.
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03:08 PM
Russ544 Member
Posts: 2136 From: S.W. Oregon Registered: Jun 2003
The added depth is also a plus if you consider the possiblity of using a thinner adapter plate for the SBC which will make more room for those wanting to utilize the stock SBC water pump in its stock position, not to mention if there is enough room to fabricate a modified plate that will allow the tranny to fit flush against the engine bellhousing surface.
Ya... maybe a copy of the Zumalt style would work. The Toyota starter would be nice also
I've gone to hide where Archie can't find me now, Abdul
[This message has been edited by Russ544 (edited 10-08-2005).]
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05:30 PM
Oct 9th, 2005
crash1369 Member
Posts: 326 From: Tobyhanna, PA, USA Registered: Sep 2005
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