moving the map sensor with the supplied fitting will hide the boost from the ECU.

the thought of a slipping clutch didnt even occur to me until revenge mentioned it. thats probably the best answer yet. are you on a stock clutch?

 

that's new to me
Is there some sort of restrictor in that Greddy tube connecting the manifold to the MAP sensor?
If this is the case then we should put the map sensor back to where it was because we want the AEM 1052 to see the boost.

While we are on the topic of MAP sensor, could we be seeing the usual OEM MAP failure where the fix is a new map sensor or the screw driver tap trick? Also the stock MAP sensor only read up to 11-13psi. Some of you guys had the boost creep to 15psi. How does the car behave at that boost with the AEM?

It's hard to second guess what's going on while I am working interstate. Thanks for all the ideas guys. What else could you guys think of?

The car is still on stock clutch. I raised that issue of clutch slip to the tuner but he said from the sound of the engine, it's the engine not making power rather than a clutch slip.

Hmm it might be worthwhile to get a 2 Bar GM map sensor for a trial. It's cheap and measure higher boost. We have plan to use run higher boost and better fuel on this car when it's done.

 

No reason to be at 12:5 AFR's at full throttle on pump gas, your just asking for trouble.

 

Thanks for the suggestion Revenge.
So that's only 50-60hp gain with the stock exhaust?

 

Depending on the dyno and from others results I would say yes. The kit was set up with a large single or 70mm dual. Then turn up the boost to like 9psi and you should get close to 280-290hp. To get the number you see on the board almost all the people have upgraded the exhaust clutch and have some type of boost controller.

 

The MAP relocator doesn't hide boost from the ecu. The map clamp in the software does. The relocator slows down the boost changes to give the ecu time to catch up, and to remove smaller spikes.

 

Sorry to say but the stuffs that come out of our pump is a lot better than your
Just j/k we get 98 and 100 octane rating in our fuel. Our octane rating is also more knock resistant than the RON system over in the US. Having said that all of my cars' AF ratio are in the 11 from this same tuner. He's conservative.

Anyway I got a call this morning and somehow everything just worked on the dyno today. Nothing was changed since yesterday. Very weird. Here is the result after some more tuning





Not bad for some preliminary result. The mainline dyno usually reads less than the dyno dynamic. The torque is almost double at low rpm even with that fairly lazy boost curve. There will be more gain with a boost controller and high flow exhaust

 

You didn't state that the exhaust was taken off. I was under the assumption it was all stock.


Check all your connections and the Map sensor like others have said.