Jump to content
SAU Community

My R31

schmenz

By schmenz,
in Classic & Vintage (1950's-1980's)

 Share

Recommended Posts

Simon-S14 Grand Master

Simon-S14

Posted
Posted

Hey Liz, thanks for a positive reply. (just realised i keep posting under my b/fs login, lol)

At the moment the car is getting another gearbox put in as the other was rooted... hopefully getting replacement boot and cd player today also.

No drift for me at the moment, but will be learning as soon as there is a prac day at Mallala im sure.. however i know that my car is horrid to drift, no angle at all, needs better handbrake and diff.

Link to comment
https://www.sau.com.au/forums/topic/140325-my-r31/page/2/#findComment-2642567
Share on other sites
discopotato03 Grand Master

discopotato03

Posted
Posted

If your going to transplant any RB I would start with an RB25DET , they make a lot more torque than an RB20DET and are dimensionally almost the same . If you want to build hybrid RB30DET's thats fine but to do it properly is expensive mainly because the compression ratio is a bit low at ~ 8.3 to 1 . Also there are limits to how much you can get out of NA RB30E pistons .

I'd forget about the RB20DET in a car as heavy as an R31 . Unfortunately you will also come up against handling limitations with strut front and unequal length trailing arm/panhard rod controlled live axle rear suspension . Without major mods you cannot stop the rear steer effect and even if you get around that the unsprung mass makes axle tramp an issue - thats without very expensive competition grade dampers .

Power beyond handling limitations and traction is a waste - a hard and expensive lesson to learn . Thinking about it I would try to enhance the RB30E with the GTS cam/computer/Nismo extractors and have a bash at driving the thing rather that doing major feats of re engineering . You may get to have a lot of fun without spending all your money and time working on it .

Cheers A .

Link to comment
https://www.sau.com.au/forums/topic/140325-my-r31/page/2/#findComment-2647347
Share on other sites
Matty 31 Grand Master

Matty 31

Posted
Posted

isnt it funny how everyone bags the 20

im on my 3rd (yes read it 3rd) rb20, and ive never thought otherwise. first one was a clapped out redtop nics mated to my auto, then i had a silvertop (which abruptly died too :laugh: ). 3rd time lucky, got a silvertop, mated it to a gtst auto till i blew the auto. gone manual and never looked back. you learn to drive around the lack of torque, and i do tow loaded trailers with my car too (hence the big f**koff towbar i have). since gettin the minispool ive noticed the axle tramp more, but thats easily cured for me with some new rear suspension bushes.

Plus in SA a 20 is now classified as a "Bolt In" engine swap, which just requires an engine number change. No ID check, no Regency inspection and no engineers report needed. 25 requires minimum of 33 GTST brakes and booster (straight away engineers report needed because you change the booster). To do a VLT setup (when i checked the specs) technically you're supposed to hav GTS front brakes as minimum, but i havent seen anyone go thru dramas with stock brakes.

Just my 2c, from someone who sticks up for the 20s amongst us. Plus if 20s are so torqueless, how come a 31 with a silvertop, stock turbo, stock boost, sidemount and 3" exhaust can beat a 33 with front mount, 3" exhaust and essentially a better turbo?

Link to comment
https://www.sau.com.au/forums/topic/140325-my-r31/page/2/#findComment-2665697
Share on other sites
SKY031 Grand Master

SKY031

Posted
Posted
there are limits to how much you can get out of NA RB30E pistons .

There are limits to how much you can get out of anything.

The stock pistons are quite capable of handling 250+kw

If you're aiming for anything higher than that, you'd probably replace them anyway.

Link to comment
https://www.sau.com.au/forums/topic/140325-my-r31/page/2/#findComment-2665918
Share on other sites
Simon-S14 Grand Master

Simon-S14

Posted
Posted

Matt, saw your car out at Lala on the weekend.. looks great, the white wheels really made it look good.

Simon is claiming my radiator since he has some weird dodgy one in his 32.. so we'll probably swap, but since im not drifting (yet) it shouldn't matter.

Link to comment
https://www.sau.com.au/forums/topic/140325-my-r31/page/2/#findComment-2670263
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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • soviet_merlin
      Duncan's V37.......race car?

      By soviet_merlin · Posted

      Thanks for doing that Duncan! Makes you a good person in my books. We don't get kangaroos or wombats here. But we have bats and it's similar. AFAIK it's often the mums with a baby attached that get hit because they drop lower when starting from a tree. If you hit an animal, check on it. https://www.ifaw.org/au/resources/wildlife-rescue-app An app to get the closest wildlife rescue contact.
    • Murray_Calavera
      Jacks that fit under GTR lips that can reach the subframe?

      By Murray_Calavera · Posted

      My dream is also to have a proper hoist, but I don't think it will ever happen. My quickjack is probably as close as I'll ever get, it really is very good though. 
    • Duncan
      Duncan's V37.......race car?

      By Duncan · Posted

      Yeah we keep on in the dailies, it is pretty poor how many animals get hit and the driver leaves without checking....have saved a couple of little ones over the years. Bit of a gruesome job though, pouches generally need to be cut open because they are so tight and often the joey doesn't realise mum is gone so they are still locked onto the teat. I checked the modules in front of the DS wheel where an oil cooler should go.... There is the radar unit - that can go for race use) One of the 2 HX water pumps, the silver cylinder. That needs to be kept but might be able to be relocated But the bad news, the big computer mounted vertically in front of the wheel (blocking any potential air exit) is the electric steering computer. That is required until/unless i do a hydraulic steering conversion, and in CAD based modern car design it is not like I can just pop a big unit like that somewhere else (plus the loom would be too short anywhere else too). So, the passenger side is OK to clear out (just use a smaller washer reservoir, potentially elsewhere), but the DS no beuno
    • Duncan
      Chris' Toyota Mark ii JZX110

      By Duncan · Posted

      Well, all the best with the new camry It was interesting to hear about the UK process, it is generally a lot more streamlined here with a shipping agent looking after all the import side (noting the exact final price can still be a surprise.....) and I've used a few different brokers on the japan (or US) side, and never had any trouble with any of them....luck of the draw I guess. You mentioned you didn't get the auction sheet (understandable since you bought it from a dealer, not auction), but I always try and get hold of that because they are pretty thorough. I've imported 2x R grade vehicles over the years and both were fine, repairs in Japan are pretty thorough compared to here in Oz.
    • Duncan
      Jacks that fit under GTR lips that can reach the subframe?

      By Duncan · Posted

      BTW I measured the jack I have, it is 70mm at the saddle but you only have about 700 until it returns to 150mm high at the cylinder so it is good but no magic bullet.
×
×
  • Create New...