R31 Skylines

[Ryanrb25]

thats what mine was too...planned on keepin the car for like 6 months till i found something i liked...lol ended up keeping it for 6 years and spend a dick load of cash on it lol. rb25det in R31 FTW! all this talk makes me wanna get another and do the same thing.

[cruzin33]

^^^^What diff did you use in your r31

[KISIN]

thats what mine was too...planned on keepin the car for like 6 months till i found something i liked...lol ended up keeping it for 6 years and spend a dick load of cash on it lol. rb25det in R31 FTW! all this talk makes me wanna get another and do the same thing.

Unfortunately for my wallet, the 25 idea is looking better at this stage then rb20...and you are not helping my wallet by saying "rb25 ftw" either

[KISIN]

only a series 1-2 but a front end conversion fixes that prob

http://forum.r31skylineclub.com/index.php/topic,84809.0.html

hmm looks tempting lol

[Ryanrb25]

i used a number of diffs...hehe. Maily consisted of auto R31 diffs with 3.899 gears with minispools. i did use a R31 pintara diff which has 4.11 gears but only 25 spline axels and not 28 like the skylines. There are alternatives like the ea-ef xr6 diff centres fit into the borg warner housing. The silhouette LSD's aren't the best but once rebuilt they are pretty good. i went though about 4 diffs in about 3 years, my driving style wasn't the most friendliest tho.

[cruzin33]

Iv been told the same about the pintara diffs. I might just keep my auto diff and weld it up at first and have some fun with that. What brakes did you use i was going to go with the z31 set up but not sure if regency will like that so might have to go with the jep spec brakes.

[KISIN]

im really stuck between rb20 and 25...which 1 should i do for a daily car (taking petrol into account). Would the 25 eat up lot more petrol with same mods/boost/driving style as rb20?

Not to mention the rb20 u can pick up for a lot less then rb25...

[barricade]

RB25 is not going to much worse for fuel than an rb20. It still comes down to how hard you drive it.

The RB20 might seem like a cheaper option now, but when you start modding it (don't lie you will) you will have to spend more money just to get what the RB25 will get for a lot less money.

Also the RB20 relies a lot on the turbo to get its power, but the RB25 will have low down torque to get everything moving.

[ISC-Performance]

As above^^ and the price difference isnt really that much if you shop around a little and considering the power torque gains.....although for reliability Ild choose rb20det :PBJ:

Ryan

[barricade]

Bah, you and your RB20's.

Put a trust head gasket on it (ISC can get them for you), to lower the compression and get a steel wheel turbo (if you want to go over 12psi on a regular basis) and it will last longer than an RB20.

[KISIN]

As above^^ and the price difference isnt really that much if you shop around a little and considering the power torque gains.....although for reliability Ild choose rb20det :PBJ:

Ryan

Ive seen some very different prices... What is a reasonable price for an rb20 and rb25 package (engine,manual box,ecu loom etc) ?

I just need a rough idea...

[barricade]

There is a full engine package (no gearbox) series 2 RB25DET at D1 Garage for $2400. If you want to save some more money you can put an RB20 box behind the RB25DET and just play a little nicer than you would an RB25 box.

If your buying an RB25DET though you need to factor in a head gasket before you put the engine in and consider that part of buying a 25, its cheaper to have the headgasket put in before you have the engine in the car. Send ISC a PM he has Trust/Greddy Head Gaskets.

[KISIN]

There is a full engine package (no gearbox) series 2 RB25DET at D1 Garage for $2400. If you want to save some more money you can put an RB20 box behind the RB25DET and just play a little nicer than you would an RB25 box.

If your buying an RB25DET though you need to factor in a head gasket before you put the engine in and consider that part of buying a 25, its cheaper to have the headgasket put in before you have the engine in the car. Send ISC a PM he has Trust/Greddy Head Gaskets.

lol...no way in hell am i putting a 20 box on a 25. Why ? Because i know its waste of money and wouldnt last me long at all (daily thrasher remeber)

Whichever engine i go, ill try and get a 25 box.

[barricade]

It was just a suggestion if your doing it on a budget, thats all. Good to hear you are going to do it right the first time.

[KISIN]

It was just a suggestion if your doing it on a budget, thats all. Good to hear you are going to do it right the first time.

Sorry now that i read what i wrote, it sounds a bit rude. Apologies.

I was just trying to enphasise how much i hate the 20 box especially on a 25 motor.

Also, do any of your guys know which series front do the projector headlights fit straight into ? Series 3 ?

[barricade]

No worries

Yeah I can understand the hate of the 20 box lol

[Ryanrb25]

i daily thrashed my rb25det....it was fine on fuel. I was hummin and harrin when i did my conversion...and dam am i glad i went for the 25...so much more bang for your buck...drove a few 31's with 20s in them and not as fun. 25's are great all round motors. younger, torquer and more responsive to mods etc. If i granny my 25 it gets around 450-475 outta a tank. no disrespect to 20's (great motor and all) but youll regret it.

[KISIN]

i daily thrashed my rb25det....it was fine on fuel. I was hummin and harrin when i did my conversion...and dam am i glad i went for the 25...so much more bang for your buck...drove a few 31's with 20s in them and not as fun. 25's are great all round motors. younger, torquer and more responsive to mods etc. If i granny my 25 it gets around 450-475 outta a tank. no disrespect to 20's (great motor and all) but youll regret it.

25ftw! lol. Just replace the head gasket and drop it in with a full zorst and fmic and im set ...until new ful pump/injectors, bigger turbo...5 stud...rims.............i hate cars. too much money lol

edit: did i mention that if i do this...this 31 would have the loudest mofo. flutter

Edited September 4, 2007 by KISIN

[Ryanrb25]

think about it...for 10psi, fmic, and a zorst you come close to 200rwkw with a rb25det. By the sounds of things your on a budget so you wont be lookin at too much boost in the near future so why bother changing the head gasket...Its not a big deal to pull the head off and wack a new head gasket while its in the car later on. i can't emphasis how much i KAINed the crap outta my first rb25det...for 4 years it had a consistant 200-205rwkw. never missed a beat. ever! stock head gasket. Im not sayin it not necessary.

im not trying to sound negative just trying to save ya time and money

Edited September 4, 2007 by Ryanrb25

[KISIN]

think about it...for 10psi, fmic, and a zorst you come close to 200rwkw with a rb25det. By the sounds of things your on a budget so you wont be lookin at too much boost in the near future so why bother changing the head gasket...Its not a big deal to pull the head off and wack a new head gasket while its in the car later on. i can't emphasis how much i KAINed the crap outta my first rb25det...for 4 years it had a consistant 200-205rwkw. never missed a beat. ever! stock head gasket. Im not sayin it not necessary.

im not trying to sound negative just trying to save ya time and money

Much appreciated

Its good to actually hear from someone with past experiences, then to sum1 crapping on what their friend of a friend of a friend said.

Also, my neighbour has a blue 31 and a white r31 s3 parked in front of his house...you on here ?? I want your white r31 lol....might have to walk down to his house and check it out

Edited September 4, 2007 by KISIN