Dyno prep

[white92frankn]

Hey guys hope everyone is staying safe!! I'm thinking of throwing my car on the dyno for a simple baseline tune. Nothing crazy. But before I go, what parts are recommended? As of right now everything is stock minus a cold air intake. It's a h23a1block and internals with h22 p13 head with accord 5spd. Thank you for your input everyone!! Btw, if you're going to ask why? Is because anytime after 5k, the motor sounds and feels "flat". If this makes any sense.. The motor has just under 8k miles on the rebuild.

['93CB7Ex]

big tube header/exhaust, euro r intake

[Raf99]

big tube header/exhaust, euro r intake

Yep. She needs to breath.

[white92frankn]

big tube header/exhaust, euro r intake

What would be considered a big tube header??

[sonikaccord]

Properly set your ignition timing.

PLM RMF or Hytech rep headers seem to do well on the H's.

[deevergote]

Falling flat after 5k makes me think vtec isn't engaging.
What engine management are you using? If you don't have something tunable, the dyno will be pointless. I would suggest calling the shop and asking what their tuner prefers to use, unless you're bringing your own expert.
You'll want a wideband o2 sensor at the very least.

[white92frankn]

Falling flat after 5k makes me think vtec isn't engaging.
What engine management are you using? If you don't have something tunable, the dyno will be pointless. I would suggest calling the shop and asking what their tuner prefers to use, unless you're bringing your own expert.
You'll want a wideband o2 sensor at the very least.

I'm using a chipped p72 I think. If vtec isn't engaging will a harness from rywire or monotech work? As I get the feeling the harness isn't spliced right. Also the vtec wire is going straight to ecu

[Rilas]

You can get a harness from Rywire, I'm not sure about Motec. There should be 2 wires going into the ecu, and 1 wire going to ground. There are multiple write ups on the forums. Just take some time to search them with google. You'll get much better results.

[white92frankn]

You can get a harness from Rywire, I'm not sure about Motec. There should be 2 wires going into the ecu, and 1 wire going to ground. There are multiple write ups on the forums. Just take some time to search them with google. You'll get much better results.

Cool so two wires from vtec solenoid to ecu and a third to a ground?

[deevergote]

Is your check engine light on for any reason?

[white92frankn]

Is your check engine light on for any reason?

Map sensor cel code. When I plug in map it won't start. When car is running, I plug in map it kills the motor and shuts off??

[deevergote]

Yeah, it's in limp mode. Get it running right before you even think about putting it on a dyno.

[white92frankn]

Yeah, it's in limp mode. Get it running right before you even think about putting it on a dyno.

That's where I'm stuck deev. Should I start with having a for sure 100% functioning harness?

[deevergote]

That would be a good idea. Getting a p13 might be good as well. Not totally correct, as there is no such thing for what you have, but as close as you'll be able to get. Troubleshooting an engine with a chipped ecu only adds to the headache.

[white92frankn]

That would be a good idea. Getting a p13 might be good as well. Not totally correct, as there is no such thing for what you have, but as close as you'll be able to get. Troubleshooting an engine with a chipped ecu only adds to the headache.

The ecu is fairly priced. But I'd love to invest in one of the rywire or nanotech harnesses but pricey AF!!