The Getrag F23 Tutorial - By Emc209i (Page 12/28)
D_sensitized MAY 14, 03:50 PM
To measure the HTOB, I followed what mattwa had done in his thread, measured the distance from bellhousing face to pressure plate fingers on the engine, and from bellhousing face to HTOB at max and min extension on the trans. I don't remember the exact numbers, but i have enough room to account for clutch plate wear and not have to worry about overextending it either.

I think I remember capt fiero mentioning something about the 2 heights of plates, I'll ask him about it next time I see him, I don't know which one I have, just that it was the one built for a 88 fiero 5 speed w/ v6. Having the pedal stop doesn't bother me, it's just a block of wood under the carpet, so if i press the pedal to the floor, it's just the right amount of travel.

[This message has been edited by D_sensitized (edited 05-14-2012).]

mattwa MAY 14, 04:19 PM
Yep, that is the correct way to measure for HTOB travel. I got this info from Fieroguru, who also suggested that 2/3 of the travel should be for disengagement, while 1/3 should be left for clutch wear.

I had to use the spacer because of PP fingers on the stock Getrag replacement PP are almost flush with the PP after it is installed, and I decided to use that instead of the SPEC PP because I didn't want to take a big chunk out of the inside of the case. The SPEC PP fingers stuck out a good bit farther when installed.

Because of this, I bought Rodney Dickman's adjustable clutch banjo, and I adjusted it as short as it could go, to make the pedal travel very short compared to what it normally is. And it works perfect, very little pedal travel is needed to disengage it. Sadly, even with an N/A 3800, I have found my SPEC Stage 2+ clutch slips If i'm not careful. :/

Just to give a visual, my clutch pedal is now about 2 inches lower then the brake pedal. I'm waiting for the moment when some Fiero guy looks at it and says "Dude, look at your clutch pedal, it's incredibly bent!" Haha.

[This message has been edited by mattwa (edited 05-14-2012).]

katore8105 AUG 04, 12:57 PM
Bump for a good thread. Maybe even a good candidate for "FAQs & HowTos" for easy finding. Wish I could give him another + to get him back.
aaronkoch AUG 04, 03:35 PM

quote
Originally posted by mattwa:

Yep, that is the correct way to measure for HTOB travel. I got this info from Fieroguru, who also suggested that 2/3 of the travel should be for disengagement, while 1/3 should be left for clutch wear.






I'm 99% sure that as the clutch wears, the fingers move CLOSER to the T/O bearing, not further away. This is also a non-issue with hydraulic clutches (assuming the master is good) as when the pedal is released, pressure is equalized to prevent requiring any adjustment of the clutch.

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Currently in the middle of my 88 + 3800NA swap

fieroguru AUG 04, 04:04 PM

quote
Originally posted by aaronkoch:

I'm 99% sure that as the clutch wears, the fingers move CLOSER to the T/O bearing, not further away.



It does. Take the total range of motion of the HTOB (say it is 1.5") and you want it setup with 2/3's (or 1") of the available travel to the front for disengagement, and 1/3 (1/2") for it to retract backwards as the clutch disk wears.
BlownFiero86 AUG 28, 04:06 AM
I found a video on youtube that helped me with the dissassembly of the f23 for a bell housing swap from cobalt to cavalier for my 3800sc. I could not understand the language being spoke the being able to watch the steps being done was good enough to give me better idea on what to do. Hope it helps someone else.

http://www.youtube.com/watch?v=x6ulVQsiknY

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86GT, 3800SC, GETRAG, true duals, 3.4 pulley, comp VS cam, zzp match flow injectors, zzp power log, WCF air intake, ARP bolts, comp lifters and push rods, 90# springs, SI stainless valves, aero-force scantech meter.
Here is my build thread http://www.fiero.nl/forum/Forum2/HTML/122548.html

mcguiver3 AUG 29, 07:24 AM
Questions?
It doesn't look like the input shaft is long enough to engage the crankshaft in a 2.8 V6?
Is this correct?
Are there any problems with mating this to the V6 except for the cables, TOB and mounts?
Can a stock clutch be used?
Will AUG 29, 09:13 AM

quote
Originally posted by mcguiver3:
It doesn't look like the input shaft is long enough to engage the crankshaft in a 2.8 V6?




FWD transmissions don't use pilot bushings
mcguiver3 AUG 29, 10:51 AM
I know we don't have pilot bearings but the stock Getrag input shaft does engage the
Engine crank shaft, right? even though there is no bearing.
Will AUG 29, 11:01 AM
There is overlap between an unsplined portion of the input shaft and the bore in the crank into which pilot bearing would be installed, but there is no contact. There is no engagement.

[This message has been edited by Will (edited 08-29-2012).]