BOV problems

[rob77]

Anyone ever had any problems after blocking off the std BOV and plumbing in a atmo bov on a r33 skyline? There's been a small but noticable loss of power from when boost comes on through to the rev limiter and sometimes I cant even get to the rev limiter. Not all the time but occasionaly the car will get to somewhere between 6000-7000rpm and the engine wont rev anymore and the engine will start to retard and I have to shift to the next gear before it'll go anywhere. To start with the original BOV was left connected as well as the new apexi twin chamber bov and this was causing problems with the AFM, since then I've blocked off the std one and the pipe that returns the air back to the intake, but its still down on power... any ideas? or anyone else have a simular problem? I'm sure the BOV is stuffing up the AFM, as pretty much everything has been checked, the only other thing maybe the fuel pump, but there arnt any other problems (not stalling, or missing). Any help appreciated.

Rob

[KamikazeR33]

ive read of a prob like this b4 on here or on sdu

how did u block the standard one off?

someone did have the standard one and a venting one and they used a metal plate in the gasket that connects it. they drilled some holes in it, they sed it helped alot by doing this

if u do a search on here and sdu u might be able to find it, ill try a search myself to c if i can help u

cheers

[adam 32]

put a coke-bottle lid down the pipe from the std BOV

this may sound dodgey but is the only way i managed to successfully block off my BOV, as when it wasnt d/c my atmo BOV was very loud and the car stalled every time you stopped

so to block off use a coke bottle lid and make sure you do up all the connections from the std BOV tight

[rob77]

I've done that. I went to bunnings and bought a reticulation part that fitted into the large pipe off the std bov (I did mention in my original post that I had done this already) and use the hose clamp to secure it in place so that I wasnt losing any air and that the airflow would be right... either way I think atmo BOV's on AFM cars are a waste of time, sure the noise is nice, but at the end of the day if it means a power loss I'd rather have the std bov. When I replace my intercooler and I re-do the piping I'm going to leave the apexi off and reconnect the std bov and see what happens, in that case I'll have an apexi bov for sale... any takers? btw: that cruise you organised adam was pretty average to say the least, sorry but I'm being honest.

Rob

[adam 32]

thanks, im well aware of that

but it was the rain's fault not mine!!

and you need a aftermarket BOV when running high boost as the std leaks

[adam 32]

so i take it your gunah organise the next cruise then rob.....

lets see if you can do any better

[rob77]

Well, I'm getting a greddy profec b fitted this week and I'm going to play with the boost a little (probably leave the low setting at 7psi and set the high to 10psi) and see what happens. If problems persist when I fit a front mount intercooler and change the piping I'll leave the apexi off, hopefuly more boost will fix the problem more boost more boost! As for the cruise, I'm not a huge fan of cruises, especially all the stories I hear about the rollaboy cruises, I dont like being around a heap of moderately to highly modified cars on the road drawing attention to themselves as I dont want a yellow sticker or some tool to do something stupid and put me in a situation where my car is damaged. I only came along cos Gus was pestering me as I missed one earlier this year, but I dont think I'll be attending anymore. I had more fun taking the car down the drags... I'll be doing that again as soon as I drop the new intercooler in, turbo to cat pipe, high flow cat and I wind the boost up to 14psi (if possible) I'm hoping for mid 13's, the car ran a 14.82 with only a cat back system and the problems I mentioned in the first post, couldnt get the launch right either.

Rob

[adam 32]

well that wasnt a rollaboyz cruise, but fine if you dont like em stay at home

just dont bad-mouth something i spent alot of time organising for people to enjoy. but its opinions like yours that really make it all worthwhile