What kind of boost patterns do you have with stock twins and a open exhaust?
#1
What kind of boost patterns do you have with stock twins and a open exhaust?
This is a question directed towards people who have the stock twins but a open exhaust (IE: no cat) I have a hi-flow cat now and was curious to see what kind of boost patterns you get with a open exhaust (so that I can simplify my engine bay and remove a lot of emissions systems.)
Thanks
I've ported my stock w/g and have a 10-11-10 pattern with a mostly open exhaust(somewhat trashed hi-flow).
Thanks
I've ported my stock w/g and have a 10-11-10 pattern with a mostly open exhaust(somewhat trashed hi-flow).
#3
Lives on the Forum
iTrader: (4)
The first day I got my mid-pipe and replaced my high-flow cat, I got crazy boost spikes. I had an autometer boost gauge and I'm not lying, sometimes it would peg the 20psi mark at the end of the gauge. If I were you, I'd make sure you have a better fuel management system, along with a boost controller to help prevent this. IE: power FC, bigger secondary injectors, profec B, and if you don't already have it, I'd also upgrade the intercooler.
Honestly, I didn't really like the midpipe. To run it I knew I had to drop a good amount of money in the fuel management and tuning. So after figuring in all of that, I would always run my high flow cat. Not only was it more reliable with it on, but I would run a solid 12psi with no spikes. It was plenty fast and it would pass smog.
Honestly, I didn't really like the midpipe. To run it I knew I had to drop a good amount of money in the fuel management and tuning. So after figuring in all of that, I would always run my high flow cat. Not only was it more reliable with it on, but I would run a solid 12psi with no spikes. It was plenty fast and it would pass smog.
#6
needs more track time
iTrader: (16)
When ambient temps are above ~65, my boost pattern is 10-8-10 throughout the rev band using my Profec B Type S to control it. Even with the Profec, the transition is difficult to tune and it fluctuates up/down 2-3 times during the transition.
When temps are cooler (especially winter), the transition fluctuation occurs more often and I creep badly after 5500 RPM.
Air flow mods are: Greddy intake + FMIC, down pipe, resonated mid pipe, rb cat back.
When temps are cooler (especially winter), the transition fluctuation occurs more often and I creep badly after 5500 RPM.
Air flow mods are: Greddy intake + FMIC, down pipe, resonated mid pipe, rb cat back.
#7
Nope, sure didn't.
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