I posted a thread in the dyno section and have not got any replies yet so o thought I would post here with a link to my thread. Thanks in advance.

https://ls1tech.com/forums/dynamomet...s-results.html

 

Well depending on the kit it maybe rated at 150 flywheel so a 128 gain would be right. 150rwhp would be about a 180 shot. Plus pulling timing will decress ur HP but did u dyno before adjusting the timing and thats the 409 rwhp? Maybe valvetrain, injectors, sensors...many maybe's? Need to know the full breakdown of all thats involved, like wheels, gear ratio, tranny set-up, n20 system, mileage between 1st and 2nd dyno.

 

Approx 300miles between dyno sessions. The 409 pull was on the same tune as the original na tune. The kit is nx gm efi kit shark nozzle. They rate their jets by whp. Used the recommended 150whp jets 62/33. Same wheels same t56 same rear. I understand the jetting they give is conservative but we had the afr in the 11.70range so the fuel jet shouldn't have mattered too much.

 

Most 02 sensors read different so your 11.7 might be 11.2 on my sensor.

What do the plugs look like?
what Plugs?
timing?
Fuel?

11.7 is Rich to me.

 

Didn't read the plugs, will do that this weekend at the track. What should I shoot for as target afr on spray and 93octane? Afr was reading the same on the dyno sensor as it was on my personal sensor. Plugs are br7ef tapped at 30thou, timing was at either 19 or 20 degrees. Fuel was 93 octane.

 

Dont even look at the 02 sensor until the plugs look right.

When they do then look and see what the A/F says.

If your not good at plug reading yet then I would shoot for around 12.0ish
We run ours much leaner but you need to read plugs and tune off of the hottest one. (probably be 7 or8)

 

Thanks and I appreciate it!! I will see what the plugs look like next time the car is sprayed.

 

Are you using the stock fuel pump/ stock injectors? Only reason I ask is you haven't posted that you have better injectors or 255 Fuel pump. I know a good tuner would have seen this and said something if he saw this but just checking.

If so I wouldn't be taking the car to the track... My 100 shot was leaning out on the top end with the stock stuff.

You will need a better Fuel pump.

 

Car has a walbro 255 and corvette fpr for return. It is on stock 28.6 lb injectors though. We stopped originally on the na tune at 6750 due to injector. With the jetting we used on the nitrous we were able to pull some fuel out with injectors so it's safe. As far as the na pull 409, maybe with the intake being routed for colder air it has caused an issue on the na tune.