Jump to content
SAU Community

Recommended Posts

Please don't flame me im just a nub! :) Lol, But i was wondering if theres such a thing.. Im told there is.. But ive searched and haven't really found much on the subject. My gearbox is abit grindy as it goes in to third every now and again and i have tried Redline oil etc.. But im just wondering ( cause it come on after a day of hard driving ) Would i have done something to the gearbox? ( A mate suggested the sin chrome but then he said that doesn't just come on it progress's.. So would this be the start? ) If so why would the gearbox start to die under only 184rwkw.. I haven't grinded the gears or anything, But just now its starting to have a slight grind in to 3rd once every 10 changes.. But morel of the story is.. Does anyone know much about a dog box for a R33? And/Or a rough price? Cause im looking at putting alot more power in it once i have the money, So i would like to start with a strong base. Even though i was told Rb25 Drive line and engines are almost indestructible.

Link to comment
https://www.sau.com.au/forums/topic/220699-dogbox-in-a-33/
Share on other sites

dog box????? do u enjoy loud howling noises and crunching into everygear instead????

a gearset made by os giken will do the trick its a sychro set to btw. u could get it dont and fitted for about 3500 to 4000 would have to order gearset from japan tho.... good for 800 crank hp so ive been told

Link to comment
https://www.sau.com.au/forums/topic/220699-dogbox-in-a-33/#findComment-3891932
Share on other sites

the previous owner of the car before you could have thrashed the hell out of it, but then u'v babied it but the box is still on its way out.

bigger clutch will put a little more strain on the box (aswell as other things)

does it grind when upshifting or downshifting? (2nd to 3rd, or 4th to 3rd)

Link to comment
https://www.sau.com.au/forums/topic/220699-dogbox-in-a-33/#findComment-3894032
Share on other sites

To R33cruiser : I have only had the car for about 2 months.. and since then i only changed it last week to put the redline in it, But the oil was still really golden.

To hayden49 : If thats the case i don't mind, I have a 2way that grinds when its cold.. But im told thats normal for them.. And i mean if its a normal thing i don't care.. its just when its a bad thing then thats when i start to get worried about something going on me lol.

To StRyDeR: And no it seems to only been shifting up in to 3rd.. I mean with second and 4th its a little bit notchy and thats about it.

Link to comment
https://www.sau.com.au/forums/topic/220699-dogbox-in-a-33/#findComment-3894234
Share on other sites

I wouldn't personally worry too much with a dog box unless you're chasing power of well over 350-400rwkw and will give the car a punishing on a regular basis... Pretty expensive for those type of gearsets. Stick with the 25 gearbox. supposed to be strong as.

Link to comment
https://www.sau.com.au/forums/topic/220699-dogbox-in-a-33/#findComment-3901387
Share on other sites

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


  • Latest Posts

    • Ha! well, there's your problem!  Guess the last person in there didn't have great attention to detail....
    • It seems like you guys want to behave like rabid dogs, rather than gentlemen... Knowing one has jumped in on a fellow comrades near done deal, and sniped it at the last second, how can one sleep at night?
    • My wifes says we have a spare set.
    • Good news!!! Changed the O ring today and I’ve got the “pssshhhh” back when I open the fuel cap 😂🙌🏼🙌🏼 It was 100% the O ring because that bloody thing was inside the fuel tank 😂😂😂😂😂 Fitting new fuel pump was a pain as always since the DW is a bit longer than stock. But she’s running!!! ❤️
    • PWM quite literally just chops the ful 12V voltage on and off at whatever duty cycle you're running it at. If you're running it 100%, then it is on full voltage all the time, same as if there was no PWM. If you run it at 50% duty cycle, it is only seeing the full 12V half of the time. This is broadly equivalent to running it at 6V. But the crucial difference is that motors (and a lot of other loads) don't like being powered at low volts. They will either fail to start rotating, or draw a shit ton of current, or other undesirable things. But if you give them the full volt, and then a short period of no volts, and then some more full volts, then the times when they are seeing power they are seeing all the voltage, and they are happy. But you get the performance out of them as if they were only seeing that fraction of the full voltage. It is not really easy to answer your question about what flow you will get out of it at 50% duty cycle. I can tell you that it is not as simple as you think. For a start, that 460 L/h pump is not going to flow 460 when you're on boost. When you're on boost you will be somewhere down the sloping part of that red line. If you have 15 psi of boost, then the pump can only deliver about 95 gal/h, which is <380L/h. So your simple 50% on 460 = 230 wasn't going to work anyway. But also, it won't deliver 50% of 380 either, because when you devolt or PWM trim th epower being fed to the pump, it is not able to deliver flow or pressure in the same way. 50% duty cycle will probably produce <50% of the full voltage flow. The way to find out what duty cycle you need to run it at at low load (ie, at idle) is to idle it and turn the DC down until you start to lose fuel pressure, then turn it back up above that with some extra for safety. And then you do the same thing at full load, in case it doesn't need anywhere near 100% DC. And if you're careful/caution/prudent, you will also do it at a couple of loads in between so you can shape the DC map against load. It might not be linear between the two end points.
×
×
  • Create New...