Shouldn't you be able to monitor the spread between MAP and EBP. If the ebpv is closed then that spread would be excessive right?

 

First - I wouldn't tow a Fisher Price Corn Popper with a 80HP tune. With the factory injectors and factory tune, there is about 60-65HP worth of fuel left in reserve in the injectors. Going for more than what's left tanks the ICP... it usually lands somewhere between 1800 and 2200 PSI ICP at WOT. This drives the EGTs up without towing - where pulling a load like this make lava. I have injectors that can speed-feed fuel into the engine to keep the EGTs down, and a turbo that can blow those candles down - giving me 160HP over stock at my disposal. However... I use a 45HP tune to tow a moderate load. If I towed heavy, I might go stock-ish power or maybe a 20HP tow tune.

Your woosh at shift is the turbo stall. I get that myself every time I'm making good boost and I let up on the accelerator.

Yes... one of the clues the OP gave me was the spread between MAP and EBP was so great. This can sometimes imply something is impeding the exhaust. Couple that with a steady whoosh out the exhaust and it sure sounded like a closed EBPV to me.

I use Torque Pro, which allows me to make virtual gauges. One of the virtual gauges I "invented" was Turbo Pressure Delta. This is a direct reading of EBP minus MAP, and the gauge shows the difference between drive pressure and boost. On my GTP38R, it's pretty much 1:1 all the way up the sensor limit. When I have a cold engine and the EBPV engages at idle, I get about 15 PSI Turbo Pressure Delta.

 

First - I wouldn't tow a Fisher Price Corn Popper with a 80HP tune. With the factory injectors and factory tune, there is about 60-65HP worth of fuel left in reserve in the injectors. Going for more than what's left tanks the ICP... it usually lands somewhere between 1800 and 2200 PSI ICP at WOT. This drives the EGTs up without towing - where pulling a load like this make lava. I have injectors that can speed-feed fuel into the engine to keep the EGTs down, and a turbo that can blow those candles down - giving me 160HP over stock at my disposal. However... I use a 45HP tune to tow a moderate load. If I towed heavy, I might go stock-ish power or maybe a 20HP tow tune.

im not sure what your saying. i also have a 60 hp tune as well. it seems to pull best with the 80 hp. just have to watch egts on bridges (florida) . 60 hp is ok and in stock its just a pig.

 

Generally speaking the lower HP tune will run lower EGTs. A high HP tune seems like the obvious choice to pull a load, but only so long as the EGTs stay in check. So generally a high HP tune is worse. If the EGTs are too high, use a lower HP tune and keep the revs up.

OP - thanks for the pics. Never seen a broken EBPV rod before. Also, another vote for keeping it if you live in a cold place or plan to use a decel tune someday.

 

ok thanks clearing that up for me, being that I live in Florida egt's aren't usually a problem until I hit a steep Bridge. Then I just back off the throttle and lug up the bridge

 

Absolutely, its amazing how something so simple can absolutely rob power and mileage and im betting the previous owner had no clue. im worried ill be doing injectors soon im not sure how adversely affected the engine as a whole was from being ran as it was for who knows how long. Thanks all
Andrew