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The BMW Range
3 Series
E30
E30 converted to M50 or M52 How much
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<blockquote data-quote="wanganstyle" data-source="post: 675321" data-attributes="member: 21946"><p><strong>One often seriously forgotten issue with DOHC 24V e30 swap is:</strong></p><p><strong></strong></p><p><strong>Suspension / footwork adjustment for 24V engine</strong></p><p></p><p>perhaps for street use it will not be noticed; but for full racing use the suspension setup for a M20 engine is NOT DESIGNED for M50 engine. The front weight of engine increases dramatically and needs more spring rate and damping, and rear spring rate needs to be adjusted for the less rear bias weight. </p><p></p><p>With M52b28 swap the car is very tail happy; the additional torque and weight is felt dramatically. The original M20b25 dyno'ed @ 154rwhp --></p><p>transition to 185rwhp of the DOHC 24v M52b28 engine required upgrading tire size/compound for traction. Larger front brakes also helped handle the additional velocity before corner turn in.</p><p></p><p>My experience is from racing a fully caged endurance racing E30. A street car will have much softer body and the added weight on the nose will be noticed at limit or in poor traction conditions very quickly.</p><p></p><p>a standard M52b28 E30 @ 185rwhp with ZF Sg320 gearbox and a 4,10 final drive is a sheer terror on the racetrack; @ 1125 KG weight its very rapid.</p><p>Street car will enjoy a 2,93-3.46 ratio with the ZF 5 speeder as any number higher will be very noisy at expressway speeds</p></blockquote><p></p>
[QUOTE="wanganstyle, post: 675321, member: 21946"] [B]One often seriously forgotten issue with DOHC 24V e30 swap is: Suspension / footwork adjustment for 24V engine[/B] perhaps for street use it will not be noticed; but for full racing use the suspension setup for a M20 engine is NOT DESIGNED for M50 engine. The front weight of engine increases dramatically and needs more spring rate and damping, and rear spring rate needs to be adjusted for the less rear bias weight. With M52b28 swap the car is very tail happy; the additional torque and weight is felt dramatically. The original M20b25 dyno'ed @ 154rwhp --> transition to 185rwhp of the DOHC 24v M52b28 engine required upgrading tire size/compound for traction. Larger front brakes also helped handle the additional velocity before corner turn in. My experience is from racing a fully caged endurance racing E30. A street car will have much softer body and the added weight on the nose will be noticed at limit or in poor traction conditions very quickly. a standard M52b28 E30 @ 185rwhp with ZF Sg320 gearbox and a 4,10 final drive is a sheer terror on the racetrack; @ 1125 KG weight its very rapid. Street car will enjoy a 2,93-3.46 ratio with the ZF 5 speeder as any number higher will be very noisy at expressway speeds [/QUOTE]
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The BMW Range
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E30
E30 converted to M50 or M52 How much
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