Test pipe or high flow cat (Turbo b18b)
#1
Test pipe or high flow cat (Turbo b18b)
I took my car to the dyno for tuning and with 9 psi I got a maximum of 200 whp and 177 tq. However, the torque is 177 lb-ft at 5000 rpm and goes all the way down to 120 lb-ft at 8100 rpm. My question is: is my high flow cat the cause of the dramatic loss of torque? Do you guys think it's worth putting a test pipe in instead?
#3
Re: Test pipe or high flow cat (Turbo b18b)
The turbo manifold is a log manifold from Spoolin performance. The turbo is a GT2871R with 0.63 AR. The intercooler piping is 2.5". The downpipe is 2.5" and the exhaust is 2.5". I don't have the dyno sheet. I'll post it if I can find it.
#4
Re: Test pipe or high flow cat (Turbo b18b)
You bring a great example of how log manifolds hurt performance in all rpm ranges exp in higher rpm'. Post a dyno sheet if available. I blame your log manifold for the tremendous drop in torque at the end of your powerband.
#5
Honda-Tech Member
Re: Test pipe or high flow cat (Turbo b18b)
Mine falls off like crazy, too. My numbers are in my sig, but I have that same mani and DP. Time for a ramhorn!
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