Thinking about keeping stock exhaust.
#1
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Thinking about keeping stock exhaust.
I was just doing some thinking about my turbo setup. My question is how much spool up and response will I lose if I keep my stock exhaust with cat and use a begi downpipe? and if I ditch the catalytic?
I dont want to spend a lot of money on the whole kit initially and wouldnt mind swapping the rest of the exhaust out later.
Thanks
I dont want to spend a lot of money on the whole kit initially and wouldnt mind swapping the rest of the exhaust out later.
Thanks
#6
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Alright so I guess i'm going all out right from the start. Money isn't the issue here, its taking the smarter approach.
Heres a question. Do exhaust flanges differ depending on the diameter of the pipe used?
I ask because if I get a begi DP which is 2.5inch and thats bigger then the factory exhaust, doesnt the step down at the flange create a bottle neck? What happens if I want to upgrade the rest of it?
Heres a question. Do exhaust flanges differ depending on the diameter of the pipe used?
I ask because if I get a begi DP which is 2.5inch and thats bigger then the factory exhaust, doesnt the step down at the flange create a bottle neck? What happens if I want to upgrade the rest of it?
#13
I noticed HUGE gains in spool and power just by going from a stock exhaust to a $140 mandrel-bent 2¼" ebay special catback.
Quantitatively: I was at ~75%DC on NB injectors at my AFR targets with the stock exhaust, redline at 7.5-8psi . Retuned with the nex exhaust, and now I run out of injector (100DC) at about 6k rpm at wastegate pressure. I had to set the overboost protection down lower and have to stay way out of high boost until new injectors arrive and get cleaned.
Quantitatively: I was at ~75%DC on NB injectors at my AFR targets with the stock exhaust, redline at 7.5-8psi . Retuned with the nex exhaust, and now I run out of injector (100DC) at about 6k rpm at wastegate pressure. I had to set the overboost protection down lower and have to stay way out of high boost until new injectors arrive and get cleaned.
#18
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BEGI's DP is normally a 2.75", and they stepped it up right before the wastegate rejoins to a 3" for me for $30 extra. I then had a custom 3" midpipe w/ a 3" Magnaflow cat made to mate the 3" enthuza to the 3" BEGI DP.