johnny89345

is this kit worth the money to swap to speed density. will i need anything else to install and notice any gains right off the bat. also how hard is it to install and tune. do you guys suggest this kit.

btw i currently have a high flow tpi setup with a mild lunati and wp torquer heads and going to afr195s and zz409 soon.

Ronny

iTrader: (1)

I read the current models are vastly improved over latter models. FYI.

check out holley ECU forum site?

ttypecamaro

iTrader: (2)

I put the 950-101 on my car like 5 years ago. The ecu is easy to tune and runs the engine well, but it ends up being a ton of wires under the hood with all the factory wires that you still need in addition to the holley harness. I ended up installing a SD TPI engine harness and built an adapter to plug the holley ecu into the gm wiring harness. If I were you I would use the money I would have spent on the kit to buy a SD TPI harness and ecm, WB O2 sensor, datalogging cable, a chip and adapter, and chip burner. All this would be cheaper and just as good as the holley kit. The holley tuning software is a little more user friendly, but the cost difference is worth it to me.

johnny89345

i thought they give you a complete new harness with the kit. how much extra wiring. was the install hard and for a first time tuner are the directions easy enough to understand and figure out with installing and tuning.

ttypecamaro

iTrader: (2)

you get a harness with the kit. after finding a way to route the harness you have to wire battery power, accessory power, and grounds. then you have to tap into the fuel pump relay, knock module wire and maybe fans, its been a while. I was a first time tuner and figured it out after a while. I don't recommend attempting tuning without a wide band lambda sensor (WBO2). I remember I had to extend a few wires here and there. Some wires you have to leave from the stock harness are the gauges (oil pressure, coolant temp, fan switch, ign coil power, tach signal, knock module, headlights, a/c if equipped, speed sensor and buffer, and there may be others I forgot about). The charcol canister, EGR, and AIR stuff won't work with the 950-101, neither will torque convertor lock-up. Having done it both ways, I'm strongly opinionated towards burning chips for the gm ecu's for significantly reduced cost, less modification, better reliability, and zero factory feature sacrifices. The 950-101 is easier to tune because the tuning and datalogging software is real-time and well-integrated (which can be achieved with a chip emulator).