m50 performance parts

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  • dpgrand
    Advanced Member
    • Sep 2008
    • 179
    #16
    Originally posted by rThor432
    A friend of mine has a 283whp US S50. He's on the forums, maybe he'll chime in. He's damn proud of it. (I dont blame him)
    :crazy::crazy::crazy:

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      • JGood
        R3V OG
        • Jan 2004
        • 7959
        #17
        Originally posted by dpgrand
        :crazy::crazy::crazy:
        There are a lot of people with 275-300whp s50's. There's one in an e30 M3 for sale in this forum.
        85 325e m60b44 6 speed / 89 535i
        e30 restoration and V8 swap
        24 Hours of Lemons e30 build

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          • dpgrand
            Advanced Member
            • Sep 2008
            • 179
            #18
            holdon - are they NA? I just assumed it was NA, if it's not NA, then it isn't that impressive.

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              • JGood
                R3V OG
                • Jan 2004
                • 7959
                #19
                Yes, N/A. Sunbelts, worked head, and if you want reliability build the bottom end. All the front running IP cars are up in that power range.
                85 325e m60b44 6 speed / 89 535i
                e30 restoration and V8 swap
                24 Hours of Lemons e30 build

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                  • e30polak
                    R3V OG
                    • Nov 2006
                    • 6136
                    #20
                    Originally posted by JGood
                    There are a lot of people with 275-300whp s50's with no usable power-band under 4 grand. There's one in an e30 M3 for sale in this forum.
                    Fixed.

                    I know you knew this already JGood, just further clarifying the numbers. For the OP though, to make that much NA power in any of the m/s 50/2 engines, there will be a sacrifice in a lower part of the power-band. :(

                    Evosport has fully built u.s s52 IP race engines making over 300whp with their crazy 290/290 cams. However, if you look at the dyno graph, there is a huge drop in torque below 4,500, then it explodes like you are hitting crazy boost! :shock:
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                      • PiercedE30
                        R3V Elite
                        • Apr 2005
                        • 4220
                        #21
                        To run the 290/290 cams you also need their special pistons with MASSIVE valve reliefs.
                        My 2.9L Build!

                        Originally posted by Ernest Hemingway
                        There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.

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                          • madjurgen
                            E30 Fanatic
                            • May 2005
                            • 1203
                            #22
                            Originally posted by PiercedE30
                            To run the 290/290 cams you also need their special pistons with MASSIVE valve reliefs.
                            That's a negative. These cams are IP legal. The lift on these isnt that much more than the sunbelts just longer duration.

                            From rulebook.
                            "All pistons must be factory replacement equivalent and match factory dome, dish, valve relief depth, ring grove placement, weight and wrist pin height, etc.; compression must meet factory specifications."

                            I may be going out on a limb here but I dont think Evosport wouldve labeled these cams as 'Prepared Legal' if they were blatantly illegal.
                            Last edited by madjurgen; 11-19-2008, 05:24 PM.

                            As time went on, the factory developed the car each year, making it faster, more comfortable, and capable of handling at higher speeds.
                            You don’t want this. You want the trickiest, most dangerous, oldest model you can find. Only then can you prove to the world that you’re a man.

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