335 Posted March 19, 2012 Share Posted March 19, 2012 Hello I am deciding what to do with the parts I have. I have a R32 GTS-T with these mods, twin front pipe, cat back exhaust, fmic, pod. Will buy a boost controller soon and I have a RB25 turbo. For now I am happy to put on the RB25 Turbo, find a computer and maybe even get aftermarket cam gears and maybe Tomei Pon Cams. Later I want to have 350 hp, but for now the power from the RB25 turbo and later a ecu tune will be ok. But I have access to a 5 year old, R33 RB25 s1 engine. It was ordered new from Nissan about 5 years ago by someone who used it in their R33. The engine has less than 10,000km on it. The engine has now a aftermarket head gasket, (not sure the thickness the man who owned it is gone), a GReddy forward facing penum, and no throttle body. I forget if the injectors are aftermarket or not. I also have access to a PFC for the engine and a Nissan stock RB25 ecu. I do not have a engine loom. Should I use my money only for fixing the rest of the RB25 engine or do the light upgrades to my RB20 first(boost controller, maybe ecu, maybe cam gears, maybe Poncams) and than work on the RB25 engine? The RB25 is from my friend who is willing to sell me the engine, PFC and front penum for cheap. Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/ Share on other sites More sharing options...
The Mafia Posted March 19, 2012 Share Posted March 19, 2012 The RB20 is what you scientifically call a "Boat-ius-anchor-ous" Throw it away and put the RB25 in there.Cheaper power and much more torque. That is where your money is better spent, guaranteed. The RB20 loom can be adapted to the RB25 fairly easily I think. There are plenty of people that have done it around here. Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6280264 Share on other sites More sharing options...
bubba Posted March 19, 2012 Share Posted March 19, 2012 ^^ what he said Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6280372 Share on other sites More sharing options...
GTScotT Posted March 19, 2012 Share Posted March 19, 2012 You have access to this new RB25 and you even ask? lol RB25 UP!! Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6280379 Share on other sites More sharing options...
R32Abuser Posted March 19, 2012 Share Posted March 19, 2012 Don't bother with RB20. Get RB25DET...Wire RB20 gear to the new motor...stick the stocker RB25 turbo on it and drive the thing! Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6280399 Share on other sites More sharing options...
GH05T Posted March 19, 2012 Share Posted March 19, 2012 Can it become legal in anyway? As in insurable? Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6280404 Share on other sites More sharing options...
DVS JEZ Posted March 19, 2012 Share Posted March 19, 2012 Hey Mafia, im telling Roy u said that Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6280411 Share on other sites More sharing options...
The Mafia Posted March 19, 2012 Share Posted March 19, 2012 Hey Mafia, im telling Roy u said that Lol, well, it's not a lie Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6281180 Share on other sites More sharing options...
R32Abuser Posted March 21, 2012 Share Posted March 21, 2012 (edited) Can it become legal in anyway? As in insurable? Here in SA it can be, and has been done. Since an RB25DE was offered in the R32 GTST, correct me if I'm wrong, but any engine with the same engine code as an RB25 can then be installed into that car legally if the following is carried out: Emissions Test (forgotten the test number). Maintain the stock RB25DET intake side (plenum, injectors etc.) and exhaust side (turbo etc.) and you are fine. Obviously there are extenuating circumstances to allow for where worn components will cause a motor to fail an emissions test Upgrading of brakes to suit increased power. Upgrade to R33 brakes and you are fine. Bare in mind, this is working on SA's rules and regulations. Edited March 21, 2012 by R32Abuser Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6283233 Share on other sites More sharing options...
KiwiRS4T Posted March 21, 2012 Share Posted March 21, 2012 If you search you will find pages of argument on "should I do up my RB20 or get an RB25" but in your case its more shall I do up this old rb20 v install a near new RB25 that comes with a load of goodies - there's no contest! Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6283290 Share on other sites More sharing options...
toffy Posted March 21, 2012 Share Posted March 21, 2012 (edited) I'm nearly as big of a fan of the little 20 as Roy , but honestly , if i had the choice to buy a low klm rb25 in good condition , id put the 25 in , sell the 20 to make back as much as i can and enjoy the slight increase in torque . Note : the best part about the lil 20 is the way it revs all day if in good condition , 25 won't take stupid limiters set at 8500rpm for very long from my experience . If the 25 was just another wrecker motor that you didn't know the condition of , i would suggest the 20 all day Edited March 21, 2012 by toffy Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6284369 Share on other sites More sharing options...
discopotato03 Posted March 21, 2012 Share Posted March 21, 2012 Possibly the easiest option is just to sell the R32 and buy an R33 . You can spend a lot of time and money building an R32 GTS25T - or you can buy one with all the factory parts supplied in an R33 . And its complied and insurable and legal . I know everyone likes to turn cars into projects but theres nothing wrong with starting out with the closest basis to what you aim to end up with . The R32 wont have the right gearbox , diff I don't know and etc etc etc . The complete conversion (everything the 33 has) would cost a bit and its doubtfull your going to get it back later . Anyway your call , I went with a 33 because it was the simplest most problem free option . A . Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6284532 Share on other sites More sharing options...
GTScotT Posted March 21, 2012 Share Posted March 21, 2012 I do agree with Disco but in this case having ready access to a fresh RB25, I would just roll with it You wont need much just a minor rewire, intake bits and a window switch for the VCT. Leave all the R32 wiring in place and just put the thing in there. Harmless! Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6284535 Share on other sites More sharing options...
DVS JEZ Posted March 21, 2012 Share Posted March 21, 2012 Hell no. Dont buy an r33. Ugly things Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6284575 Share on other sites More sharing options...
On Edge Posted March 22, 2012 Share Posted March 22, 2012 rb25, its better Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6284733 Share on other sites More sharing options...
Rolls Posted March 23, 2012 Share Posted March 23, 2012 Can it become legal in anyway? As in insurable? Yes do an application to modify vehicle, go through a full inspection with R33 brakes installed and voila, legally registered r32 with an rb25det. Do it and don't look back, the rb20 sucks, lower compression, no vct and half a litre less capacity. Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6286531 Share on other sites More sharing options...
cherring Posted March 23, 2012 Share Posted March 23, 2012 Hell no. Dont buy an r33. Ugly things What he said. Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6286674 Share on other sites More sharing options...
GH05T Posted March 24, 2012 Share Posted March 24, 2012 how does the 20box handle a 25 even if its just for a while? Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6288078 Share on other sites More sharing options...
Rolls Posted March 24, 2012 Share Posted March 24, 2012 how does the 20box handle a 25 even if its just for a while? depends how you drive, mine has been fine with 240kw for ~2.5 years Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6288088 Share on other sites More sharing options...
DVS JEZ Posted March 24, 2012 Share Posted March 24, 2012 Depends on clutch and driver abuse Link to comment https://www.sau.com.au/forums/topic/395181-sense-spend-money-on-rb20-or-rb25/#findComment-6288089 Share on other sites More sharing options...
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