DP Question

[Jay C]

Has anyone come across any Dyno tests of Recirculated DDP's? I want a new DP as my 3" still has the stock elbow and i have been looking at the BIC as it seems like a good deal with great feedback, the raptor racing one also looks good. I know that the vent to atmosphere DDP has a decent increase over the non divided as it removes some of the turbulence but I have never seen anything on the rerouted one which keeps all of the air flow but changes where in the pipe it is introduced. Any help would be appreciated.

 

[hvyman]

Bic did back to back dynO runs and made like a 30hp increase from a full dp to a open ddp.

 

[GrimJack]

Bic did back to back dynO runs and made like a 30hp increase from a full dp to a open ddp.

29 hp, to be exact. And the test was biased in favor of the stock system as well - he started with the stock system on the dyno, recorded the max power, then pulled the DP while it was still hot and put on the DDP, then ran it again. All run on the same day, same ambient pressures, temps, etc, however the IC system could have heat soaked some during the downtime.

 

[Turbo Habanero]

So with the divorced section being rerouted what was the HP increase over regular 3inch?

 

[Jay C]

Yes i know the DDP produces better then a regular DP but has anyone seen any numbers on a Rerouted DDP. I am trying to figure out which one i want a rerouted or a standard 3".

 

[GrimJack]

I don't think he was building the rerouted ones at the time, so he couldn't run the same test.