Jump to content
SAU Community

Recommended Posts

has anyone here tried to upgrade the old stock dump/front with a new 3" dump/front combo from BATMBL ??

im having major dramas, everything should be fine but did anyone have any problems bolting it on ??

I cannot seem to get the frigging nuts on, they just wont fit. I dont know how nissan ever got these things on the nuts keep hitting the exhaust housing of the turbo !!

Link to comment
https://www.sau.com.au/forums/topic/87730-rb20-dump-pipe-change/
Share on other sites

well if they are anything like the rb25 turbo ... there should be 2 studs out of the turbo adn 3 bolts that go into the housing ... there should only be the 2 nuts and they are on the back side of the exhaust dump.

Yes it's the same as the RB25DET - and it is Damn fiddly. I ended up shearing a bolt off - and one bolt wouldn't go in the whole way - I ended up just leaving it - Seems to work fine with 2 less bolts ;):)

get under the car to get the 2x nuts off ..

top ones just socket them or use a ring spanner if needed.

I didn't find it too hard, other than 2 snapped bolts, but they were the original bolts and nearly 15 years old.

I didn't really notice too much difference with the dump at all, but there might be a bit more power there. Haven't got it dynoed so don't know.

yea getting the old dump off was a bitch, especially the 2 nuts off the bottom. In the end i have the top 2 and middle 2 bolt screwed in real tight with no nuts on them at all and just the bottom two bolts with nuts on them. I don't even understand how nuts would ever fit on those other 4 bolts, unless they faced the other way which they wont do. Currently the bottom 2 have the head of the bolt (if there was a head) facing the exhaust housing whereas the other 4 have the head facing the dump pipe end. Does this sound right to you guys ?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hope you aren't too sore after that one, might take a day or 2 to notice yet and I guess it is a loooooong drive home. On the bright side, tube frame front end is a thing at superlap, right?
    • https://www.facebook.com/share/p/18rmVb1SKB/ 
    • The chart of front pressure to rear pressure (with one being on the x axis and the other being on the y axis) is not a straight line on a typical proportioning valve. At lower pressures there is a straight line with one slope, and at higher pressures that changes to a lower slope. That creates a bend in the line at that pressure, called the knee point. If you do not change the proportionng as the pressure gets higher, you will suffer excessive pressure (at one end of the car or the other, depending on which way you look at the proportioning action) and then get lockups at that end. The HFM BM57, from my memory of previous discussions, is based on the BM57 from a different car (to a Skyline), with a different requirement for the location of the knee point and the distribution of pressure front to rear, and so is not a good choice for an upgrade on a Skyline. Here's a couple of links to some old posts, one from here, one from elsewhere. A lot of it pertains to adjustable prop valves, but the idea is the same. There are plenty of discussions on here about this issue from al the many years of people wanting a cheap/accessible option. https://grassrootsmotorsports.com/forum/grm/learn-me-brake-proportioning-valves/236880/page1/ https://grassrootsmotorsports.com/forum/grm/learn-me-brake-proportioning-valves/236880/page1/  
    • Yeah dunno why johhny posted that here with no context, just post on FB/insta bro where he put it up?  Laine had an off at T4 during Thurs prac, he's ok, car is less than perfect, they are done for the weekend, he can fill in the rest. Bando also binned it like 100m up the road.   
    • I feel there must have been a FB/insta post and the weekend did not start well at all I hope everyone is all okay
×
×
  • Create New...