Drivlinje e21

[Gjest]

Noen som vet om drivlinjen på e21 er svakere enn på e30? Tenker først og fremst på mellomaksling, diff og drivaksler da jeg vurderer å bygge banebil med m20 motor/gear i en e21 i stedenfor e30 grunnet lavere vekt.

[propan]

Ja. De tåler ingenting orginalt.

Det er ombygging til e30 som holder. Mellomaksel er ikke noe problem,kun diffen.

[Gjest]

Ja. De tåler ingenting orginalt.

Det er ombygging til e30 som holder. Mellomaksel er ikke noe problem,kun diffen.

Passer diff og bakstilling om hverandre på e21 og e30, eller er det mye arbeid å få til?

[Rotty]

fant dette en plass:

320I E21 Road Race / Auto-X Suspension

Doing an E21 properly is quite a bit more work than doing a 2002. There are inherent problems with your chassis that the extra weight only makes worse when it gets on a race track. Fortunately we have raced a 320I for 3 years and have figured all this stuff out. Here is exactly how we have set up the last 10+ cars we have built. All are competitive in their respective groups and have been very consistent top 5 and occasionally winning cars. As the drivers dial them in I am certain they will have even better success. These are the components you will need and the work either yourself or someone you trust will have to do. It is assumed that you will make sure all the standard parts ( Ball joints, wheel bearings, brakes, Etc, are up to par )

Front: Parts

Complete coil-over conversion with adjustable camber plates $525.00

Camber Plates, Upper and Lower Perches, Springs, Threaded Collars

Spring rates vary from 300 lb to 500 lb depending on the car and the track. We

Start with 400 lb for I.T use and 350 lb for Auto-X

Camber should be set at about 2.5 negative for Auto-X and 3.5-4 negative for

Road race. Toe should be at 1/6" IN total.

Bilstein Sport Strut inserts for short strut housings $129.00 ea

25mm sway bar with urethane bushings. ( Priced as pair with 19mm rear ) $325.00 pr.

Camber adjustable Delrin and aluminum control arm bushes $89.00

New lower control arms with ball joints and H/D bushes installed $79.00 ea

Aluminum Sway-Bar to frame mounts $98.00

Upper Strut Tower Brace $159.00

Engine Torque Brace option for Strut Tower Brace. (Add to cost of brace) $85.00

Urethane Steering Rack Bushings $49.95

Rear: Parts

Bilstein Sport Shocks $139.00 ea

Coil-Over Conversion for Bilsteins. ( Includes mods to Bilsteins ) $298.00

Rear spring rates should be from 150-280 lbs. We always start with 200 lb and they

Work well about 80% of the time.

1.75-2 negative camber in the rear and 1/8 per side toe-in.

Solid Rear Sub-Frame mounts $100.00 pr

19mm Adjustable rear sway bar ( See 25mm front bar for pair pricing ) $195.00

and / or

17mm Adjustable rear sway bar. $250.00

Rear Urethane trailing arm bushings ( set of 4 ) $69.00

Rear shock tower brace with battery re-location kit ( 77-83) $169.00

Front K&N Filter conversion with pipe. For use after battery has been moved. (81-83 ) $135.00

Package with rear brace and Air Filter kit $279.00

K&N Air filter for Stock Air Box (81-83) $55.00

K&N Air filter for Stock Air Box (77-80) $59.00

When doing an early E21 with the funky fuel injection the best thing to do with the filter

Is to put a K&N element into the stock box and drill a bunch of holes in the lid. ( Or just

Cut out the center and just leave the lip to hold the filter. )

Labor:

Shorten front strut housings and install struts and threaded collars $90.00 pair

Slot rear subframe for camber and toe adjustment $100.00 Using your subframe

After setting alignment weld washers in place. Do Not Leave Adjustable. It Will Move. I Promise.

Re-Enforce rear subframe arms and diff carrier. $275.00 Using your subframe

This is critical to do. I know it says it is not legal but if you do not do it you will be replacing subframes at a tremendous rate and your camber and toe will change during the race from the amount of flex. No one will notice if you do it discreetly and you can always argue it is a safety issue, besides, everyone laughs at a 320I race car anyway. They certainly don't look for cheating in the rear subframe.

Good used Subframe with slotting and re-enforcement done. $550.00 Outright

Brakes:

R4 Carbon Kevlar Racing Pads $139.00

Steel Braided Brake Line Kit $120.00

R4 Carbon Kevlar Racing Brake Shoes $189.00

81-83 Big Front Brake Conversion:

Bolt on kit with Vented Rotors, 4 Piston Calipers, Metal Master Brake Pads

Steel Braided brake line set and hardware. $450.00

[propan]

Det der gjelder alt rundt.

En E21 diff uansett om det er alpina eller hva det er tåler ikke pådrag ut av en sving med litt effekt under panseret.

Det racetep beskriver over her som Rotty har funnet er hovedsaklig for å få bilen til å komme greit gjennom en sving.

De passer ikke om hverandre,og det er litt jobb å bygge om ja.

Det er endel svising,dreiing og tilpassing for å få det til. Eksosen må også bygges om.

[Gjest]

Ok, takker for svar. Spørs om jeg får holde meg til e30 da...