If I wanted to use a test pipe on a subzero car which map would be better, the subzero map or the 0 map? I didnt see anything on the vishnu website about this.
Thanks for any replies

 

I have a 0 with cat less map if you need it? Email me and I can email you back the map this weekend. But I think you can run 0 with a cat delete.

Eric

 

I think your original map is the right choice

 

Could u please send me your Stage 1 catless map? Please? lockdesk@overlandwholesale.com

Thanks

Tony

 

Tony do you have cam gears. Because I don't have a catless cam gear map.

 

to think the original map is the right choice - whether or not you have a cat?

 

It would be the safest route. The base maps are very conservative for good reason. Evos are so diffrent from on to the other when mapping.

With gears, Maps are usally much leaner then cars with out gears because the gears raise the knock resistants.

Being cat less also rasies the knock resistants and also alows the turbo to breath free witch mean you have to adjust the boost so it would not spike to much.

Eric

 

I always thought that less backpressure would actually lower boost, rather than cause a spike. Wouldnt removing the cat reduce backpressure?

 

Reducing backpressure means less work for the engine to pump exhaust through the turbine and out the exhaust system. Yes, removing the cat will remove its contribution to backpressure (though I'd like to see how much backpressure a properly-sized high-flow cat actually does contribute). Reducing backpressure should only improve the rate at which boost builds, as well as the peak power and torque figures. It shouldn't lower boost.