I sounds to me like he knows his stuff. On that point of overboosting I agree with your builder. Your running a completely open exhaust and that WILL cause boost creep. It has nothing directly to do with a dyno sheet. And the only way to cure it is to add restriction back into the exahuast (ala: cat) or port the wastegate.

I was told by 7 different tuners that unless your running at least 100hp more than what you are you shouldnt have that problem...???



But then in that case shouldnt he have ported it in the first place because he knew the car was going to be running that much power...and nothing has been changed since he built & mapped it...

Probably. But it doesn't hurt to be an informed consumer either.

Rixio, I agree with Singal 2 about boost creep. It has nothing to do with HP... well, before I say that, most of the time more boost means more HP.. but regarding creep, its what he said, too free flowing exhaust system.



If your not shooting for 400HP I would put your cat back on. That will help from creep. Or get the waste gate ported (for stockers).



Regarding your builder.. well, For 2 years, I was shopping around for builders. Its not about how long they have been building but how well can they build. I've met some builder who was cocky and told me he's been building engines for 10 years and he doesn't have to spec parts because he could just feel it and know... Complete BS! And there are builders who just started and knows the ins and out and takes their time. That's the kind of builder you want. To take the rotary apart only takes an hour. To assemble it, maybe 2-3 hours... But cleaning and spec'ing all the little parts is where it takes time. My builder specs everything, assemble it, crank it on a table, break it in by going thru heat cycles, etc.. Costs little bit more but when i get it, I know its good!



Like I said earlier, make sure your builder has a lapper. Very few builders in US has one. And some say they send it off and its not lapped. I saw a pic of someone who send it off to some place to get it lapped and it was just put on a circular sander. Not the same.

Hmm...ok...abit confused now but nm...



Well thx for all the advice guys, i really do appreciate it...if he doesnt honor the warranty then im gona end up rebuild it myself because i just cant afford another £8k...i will send the parts off to another builder who i do trust but whos very expensive to rebuild & heavily port the block...if im taking the engine out i may aswell go single...To4Z i was thinking...or maybe GT3540R...



Thanks Again...will keep everybody informed https://www.nopistons.com/forums/pub...IR#>/smile.png