S65 4.0L Racing Engine Rebuild Kit with Stock Rods

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$4,999.00$7,999.00

The CarBahn Autoworks S65 4.0L racing engine rebuild kit with stock rods includes CarBahn Autoworks valve springs, centered pin low friction forged pistons.

Optionally, you may choose to further enhance performance with our very high lift and duration camshaft kit, specifically designed in accordance with SCCA GT2 and Trans TA3 rules. This camshaft kit also includes a conversion to solid lifters and high performance valve springs with titanium retainers.

 

 

Additional Information

Steve Dinan has been building high performance and racing engines for BMW’s since 1977, winning 11 racing championships including 3 prototype championships and two 24 Hours of Daytona. The same engine shop that builds the racing engines also builds the street car engines; these talented engineers, machinists, and builders have built hundreds of engines from OEM street rebuilds to full-blown racing engines.

The CarBahn Autoworks S65 4.0L racing engine rebuild kit with stock rods includes CarBahn Autoworks valve springs, centered pin low friction forged pistons. This engine is excellent for BMW, SCCA or NASA club racing.

Refer to the graph below for the power results of the wet sump 4.0L Racing S65 with stock cams, without catalytic converters, on 100 octane race gas, using SAE J607 (the typical aftermarket correction).

S65 4.0L Wet Sump:

RPMTRQHP
3500313.7209.1
4000330.3251.6
4500331.6284.1
5000323.2307.7
5500324.4339.7
5800324.1357.9
6000318.3363.6
6500315.8390.8
7000314.1418.6
7500301.9431.1
8000294.6448.7

No cats, 100 octane unleaded, J607

Optionally, you may choose to further enhance performance with our very high lift and duration camshaft kit, specifically designed in accordance with SCCA GT2 and Trans TA3 rules. This camshaft kit also includes a conversion to solid lifters, high performance valve springs with titanium retainers, and racing valves.

Refer to the graph below for the power results of the wet sump 4.0L Racing S65 with racing camshafts, without catalytic converters, on 100 octane race gas, using SAE J607 (the typical aftermarket correction).

S65 4.0L Wet Sump with Race Cams:

RPMTRQHP
3500278.2185.4
4000289.4220.4
4500315.2270.1
5000318.8303.5
5500325.0340.3
6000316.7361.8
6500312.5386.8
7000323.9431.7
7100324.9439.2
7500315.7450.8
8000310.9473.6
8200307.9480.7

No cats, 100 octane unleaded, J607

These engines can run with the stock oiling system and wet sump, but for even more power and increased reliability, Carbahn Autoworks recommends the use of our dry sump kit. This kit includes a Dailey Engineering billet oil pan and oil pump, plus additional pulleys and a drive belt.

Refer to the graphs below for the power results of the dry sump 4.0L Racing S65 with and without race cams, without catalytic converters, on 100 octane race gas, using SAE J607 (the typical aftermarket correction).

S65 4.0L Dry Sump:

RPMTRQHP
3500311.9207.9
4000323.3246.2
4500328.9281.8
5000328.8313.0
5500328.6344.1
5800330.7365.2
6000329.1375.9
6500325.7403.1
7000321.8428.9
7500312.9446.8
8000306.6467.0
8200301.6471.0

No cats, 100 octane unleaded, J607

S65 4.0L Dry Sump with Race Cams:

RPMTRQHP
3500276.0183.9
4000286.2217.9
4500312.5267.7
5000324.4308.8
5500329.2344.7
6000327.5374.1
6500322.4399.0
7000331.6441.9
7100332.6441.9
7500326.7466.5
8000322.9491.8
8200320.4500.2

No cats, 100 octane unleaded, J607

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