Hartge dyno results, done a dyno test today on the e34 535i
did a dyno run on my 1990 535i , that i have recently fitted a semi rebuilt hartge engine in .
i built this engine up with a hartge tunned head ( bigger valves and porting) head is dated back to 1984 came from a 87/88 635i from japan .
i used block from a approx 89 535i or 735i , fitted 10:1 cr pistons from e23 86 735i , had new riings and bearings fitted , valave grind , both head head and block where skimmed .new chains and sprockets etc .
fitted it along with a 5 speed manual box into this 90 535ia 3.45 diff.
was a bit disapointed with the proformance when i got it all going , found a bit more power after changing fuel filter and also swapping ecu from a motronic 1.3(original one in car) for a modified 1.1 from a 87 735 e32, seamed a little better , still enquiring with enginer and parts people why is seams ro be down on power , decided to reset tappets a little loser after doing compression test and only coming up to 150psi ( should be 180+) .also rechecking cam timming noticed it looked at by one tooth , reset to true .
and all seams to be good now .
dyno results show 4 different ecu's we tried , first run was the lowest with the modified unit from a e32 735i about 126kw at the wheels ,
then nest run with the original ecu that came with hartge engine came up to 132.9kw then 2 more goes with std 1.3 motronic ecu and 1.1 motronic ecu both better than the 735i one but not as high as the orginal one .
a friend of mine had his 86 M535i 5psd 3.07diff ,there on friday came up as 123kw (shrick cam and e34 head ) and another guy there witha 90 535is had 112kw (map sensor afm fited).
gavin who owns the place use to have a alpina B10 e34 that did 141kw , and also ahas a e30 335ia with fully worked engine with auto and 4.11 diff doing 158kw .
he said we could tune the ecu a little more to get the power to carry on andn maybe even up a little .
still have std exhaust and intake system ,
first pic is a few of the runs with different ecu's
second pic is the power and the torque
third pic is the fuel and power curves
132.9kw equals about 181hp at the wheels , add about 25% for flywheel rating 226hp .
std e34 is 211hp 305Nm std e28 is 218hp 310Nm .
mine was about 325Nm pretty flat
full hartge spec engine about 240Hp and alpina about 250hp
hope you can see these pics this time
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