I never could get the engine to run right with MS2. Forum tried to help, but nothing anybody suggested did anything helpful. It randomly skipped, missed, popped, backfired, you name it. Butt dyno showed it lacking in power, and it wouldn't rev past about 5k.
I installed the holley and it ran great right out of the box. I did have an issue with the holley ecu which necessitated replacing it (it stopped being able to read/operate the wide band sensor). It took some argument with support, but they finally sent me a new one.
The difference in price between the two is the support (and maybe warranty?). Well worth it to me. I didn't need any extra I/O, so that was never a consideration in my case. I think I had the fan and fuel pump running off ignition switched relays. Fan was on high speed at all times.
Its supposed to be possible to keep the cluster with a holley system; I just haven't seen anyone saying much about how to do it.
I installed the holley and it ran great right out of the box. I did have an issue with the holley ecu which necessitated replacing it (it stopped being able to read/operate the wide band sensor). It took some argument with support, but they finally sent me a new one.
The difference in price between the two is the support (and maybe warranty?). Well worth it to me. I didn't need any extra I/O, so that was never a consideration in my case. I think I had the fan and fuel pump running off ignition switched relays. Fan was on high speed at all times.
Its supposed to be possible to keep the cluster with a holley system; I just haven't seen anyone saying much about how to do it.