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Achieva hubs by mcguiver3
Started on: 10-07-2014 07:45 AM
Replies: 6 (251 views)
Last post by: sardonyx247 on 10-14-2014 03:37 AM
mcguiver3
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Report this Post10-07-2014 07:45 AM Click Here to See the Profile for mcguiver3Send a Private Message to mcguiver3Edit/Delete MessageReply w/QuoteDirect Link to This Post
I looked for any threads on this but came up empty.
Anyone make this swap on and 88?
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jaskispyder
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Report this Post10-07-2014 07:57 AM Click Here to See the Profile for jaskispyderSend a Private Message to jaskispyderEdit/Delete MessageReply w/QuoteDirect Link to This Post
Isn't this the same chassis as a Grand Am?
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fieroguru
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Report this Post10-07-2014 08:25 AM Click Here to See the Profile for fieroguruSend a Private Message to fieroguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
Mounting patterns to upright:
Achieva: 3.86"
88 Front: 3.74"
88 Rear: 4.02"

Flange offset from upright:
Achieva: 44.4mm
88 Front: 36mm
88 Rear: 42mm

To use the achieva bearing in an 88 front, you will have to bore the upright about .140" larger and slot the mounting holes in the flange inboard. You end up with the front rotors pushed out 8.4mm per side and might have issues with the caliper mounting on the uprights. You could mill the face of the upright to reduce the increased offset some.

To use the 88 rear wheel bearing on the 88 front, you will have to bore the upright about 0.040", do more slotting of the mounting holes inward, possibly clearance machine the bearing for the new bolt head location, and the flange will still be 6mm further out. Could mill the face of the upright to reduce this some.

To use the achieva bearing on the 88 rear, you will have to bore the rear upright about .100" and slot the mounting holes outward. The flange offset would only be 2.4mm
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ennored
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Report this Post10-13-2014 12:31 PM Click Here to See the Profile for ennoredSend a Private Message to ennoredEdit/Delete MessageReply w/QuoteDirect Link to This Post
1992-1998 Achievas were N bodies, Grand Am to this Pontiac-centric crowd.

What are the advantages of using this hub? Just the fact that you can still get them? Are they any "bigger"? Guys who raced Achievas swapped out their rear hubs for bigger ones I believe, making me wonder if the swap would be worth the work.
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mcguiver3
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Report this Post10-13-2014 12:38 PM Click Here to See the Profile for mcguiver3Send a Private Message to mcguiver3Edit/Delete MessageReply w/QuoteDirect Link to This Post
The goal is to use them in the rear to replace a unit that has not proven itself to be reliable under the extreme conditions of autocrossing and road racing.
The A.C.Delco unit looks to be the one to get.
Availability is a plus as not too many OEM bearings are available.
I just experienced a total failure of a bearing at Thompson Speedway road course a month ago.
It ultimately took out the transmission and caliper.
Not a fun time at the end of their long main strait at turn entry.
The front bearing issue is still to be solved.
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Dennis LaGrua
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Report this Post10-13-2014 06:58 PM Click Here to See the Profile for Dennis LaGruaClick Here to Email Dennis LaGruaSend a Private Message to Dennis LaGruaEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by mcguiver3:

The goal is to use them in the rear to replace a unit that has not proven itself to be reliable under the extreme conditions of autocrossing and road racing.
The A.C.Delco unit looks to be the one to get.
Availability is a plus as not too many OEM bearings are available.
I just experienced a total failure of a bearing at Thompson Speedway road course a month ago.
It ultimately took out the transmission and caliper.
Not a fun time at the end of their long main strait at turn entry.
The front bearing issue is still to be solved.


The FIero rear hubs should be very reliable if you are using quality Timken, Bauer, or SKF made bearings tightened with the axle nut to 200 ft lbs. AC Delco is usually a quality brand but who knows who makes them today? AC Delco is now mostly made in Communist China. We've seen 3800SC's give 12, 11 and 10 second quarter mile runs with high quality hubs without a problem. Drag racing would also appear to be extreme duty use. What is a problem are the cheap low quality Chinese made hubs. I've seen those hubs on other peoples cars fail in under a year of normal driving. They are made from high impurity recycled inferior scrap steel, and IMO complete garbage. Quality bearings are forged from pure iron ore, not recycled scrap steel.

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sardonyx247
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Report this Post10-14-2014 03:37 AM Click Here to See the Profile for sardonyx247Click Here to visit sardonyx247's HomePageClick Here to Email sardonyx247Send a Private Message to sardonyx247Edit/Delete MessageReply w/QuoteDirect Link to This Post
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