Jump to content
SAU Community

Recommended Posts

Could those that have actually put rb20de cams into a rb20det please reply,

I know there are lots of speculation, but i would like facts only please.

i have some de cams ready to put into my det, just wondering if i can find someone who has done it.

i know the de cam specs look less impressive but what do they do in real life, ultimately i'm looking for more midrange power, as i'm driftin my car, so more wide usable power is good for me.

please reply if you have done this, and with what type of result, and did you do any other mod at the same time.

Thanks

Dayna

http://www.tomei-p.co.jp/_2003web-catalogu...haft-specs.html

The DE cams have a smaller inlet duration compared to the DET cams.

If anything it would only increase bottom end torque.

How much it would pull from the top end I wouldn't know. :D

that 'guy' is me! and i have finally changed them. I was just wondering if you Australians had some more info before i did do it.

heres a copy of the post, more info coming....

well, finally did it today!

done only a couple of g-tech runs,

166hp

15.58 quarter

7.54 0-60mph

car 'feels' better down low,

deffently no huge loss or gain of power,

i would personally say at the moment that the car is running better, more drive-able, power feels smoother/stronger down low.

boost is running low (10-11psi) and the g-tech runs were reasonable, considering i have done more runs of original setup since original post... and i was running quarters of up to 16.5!, i am finding the HP figure to be a good indicator tho.

I will hopefully tomorrow fiddle with the timing some, and tweek boost slightly and get back to ya some more.

Dayna

Peak power means jack.. If you have more power to get to that peak power even if it is slightly less then the car will obviously accelerate quicker. :D

Good to hear some positive results from the smaller duration/lift NA inlet cam on the T.

Dyno2003 (software sim) showed that with the smaller inlet cam only a couple of hp was lost up top however bottom end & mid had picked up quite a bit.

Give it a couple of weeks and you will get used to it.. Then you will be wondering if it really did make any difference. :D

SO is that the RB20DE Cams or wat? THanks

that 'guy' is me! and i have finally changed them.  I was just wondering if you Australians had some more info before i did do it.

heres a copy of the post, more info coming....

well, finally did it today!  

done only a couple of g-tech runs,  

166hp  

15.58 quarter  

7.54 0-60mph  

car 'feels' better down low,  

deffently no huge loss or gain of power,  

i would personally say at the moment that the car is running better, more drive-able, power feels smoother/stronger down low.

boost is running low (10-11psi) and the g-tech runs were reasonable, considering i have done more runs of original setup since original post... and i was running quarters of up to 16.5!, i am finding the HP figure to be a good indicator tho.  

I will hopefully tomorrow fiddle with the timing some, and tweek boost slightly and get back to ya some more.  

Dayna

Joel,

i agree with your software analyses and peak power thoughts!

The cams have made a very noticable difference down low-mid, previous setup i would say that boost started to build up around the 3,000rpm mark. Now with the NA cams boost is at 5psi at 2,500 and peaking around 2700-2800rpm. Car is more responsive and feels alot more pleasurable to drive and each gear change is into a good power band!

Being that my car is purpose built for drifting it is an avantage to have a fatter power curve and more usuable down low power.

I give it the THUMBS UP!

yes RB20DE cams 93RPS13

Dayna

(more info check out my post on SDU forum)

Dayna,

I read your thread on SAU and found it interesting. Good work. I am considering the the NA cams as I have a VG30 roller bearing (not high flowed) which is great when it comes on boost, but has left a bit of a hole down low.

Did you change both cams or just the cam on the intake side? What pressure (torque) did you tighten the bolts that holds the cams down with?

Has there been anyone else who has actually made this change given you any feedback?

how much did you pick up an rb20de intake cam for? and what else was required to buy to make it all work? or was it just a case of slap her in there and drive away?

also, do you have an 'before' performance figures to compare to the 'after' figures that you posted?

cheers,

Warren.

WazR32GTSt

i scored the cams for NUDDA!, and it was just a matter of unbolting them (apart from all the work to take the cam belt off etc etc), and swapping them over, I changed both the intake and exhaust to the DE cams. it took me a cruisy 5-6 hours to do, i changed the cambelt and front oil seals at the same time.

I wish i had a super accurate dyno graph of before and after but alas i don't, but i did do alot of runs using a g-tech meter and before and after times are virtualy identical, BUT here comes the major difference....

Boost starts to rise from 0psi approx 1900RPM! and will max(12psi) at approx 2500RPM. this is 500-600RPM lower than standard. torque down low is increased considerably even when off boost and just cruising. Top end power has not changed enough to notice. obviously it has but i believe not very significantly.

I'm a drifter, thats what my car is built for, and now it has a better motor for driftin, but i have not lost outright drag performance...if anything it could be faster but i feel it is equal.

it cost me nothin but time to do and i had to change my cam belt and fix the oil leaks anyhow so didn't take much extra to pop the covers off and swap cams over.

it is more drive-able and cruisy and feels like it actually is a 6-cylinder now it skids up alot easier now thats for sure!

hope this info helps

Dayna

  • 1 year later...

I just stumbled accross this thread again and thought I woudl give out some feedback. I swapped the inlet cam on my RB20DET for an inlet cam on my RB20DE. At first I did not notice a real difference, but when you put you foot down - boy is it sh!t. This was a massive waste of time in my opinion and I was soooooo happy to put the stock cam back in. For anyone who would like to try this for themselves I paid $100 for the pair and ended up giving them away as it was too painful thinking about the time I had wasted rooting around with this. Maybe they just don't work as well in Australia as they do in NZ : )

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

    • Next on the to-do list was an oil and filter change. Nothing exciting to add here except the oil filter is in a really stupid place (facing the engine mount/subframe/steering rack). GReddy do a relocation kit which puts it towards the gearbox, I would have preferred towards the front but there's obviously a lot more stuff there. Something I'll have to look at for the next service perhaps. First time using Valvoline oil, although I can't see it being any different to most other brands Nice... The oil filter location... At least the subframe wont rust any time soon I picked up a genuine fuel filter, this is part of the fuel pump assembly inside the fuel tank. Access can be found underneath the rear seat, you'll see this triangular cover Remove the 3x plastic 10mm nuts and lift the cover up, pushing the rubber grommet through The yellow fuel line clips push out in opposite directions, remove these completely. The two moulded fuel lines can now pull upwards to disconnect, along with the wire electrical plug. There's 8x 8mm bolts that secure the black retaining ring. The fuel pump assembly is now ready to lift out. Be mindful of the fuel hose on the side, the hose clamp on mine was catching the hose preventing it from lifting up The fuel pump/filter has an upper and lower section held on by 4 pressure clips. These did take a little bit of force, it sounded like the plastic tabs were going to break but they didn't (don't worry!) The lower section helps mount the fuel pump, there's a circular rubber gasket/grommet/seal thing on the bottom where the sock is. Undo the hose clip on the short fuel hose on the side to disconnect it from the 3 way distribution pipe to be able to lift the upper half away. Don't forget to unplug the fuel pump too! There's a few rubber O rings that will need transferring to the new filter housing, I show these in the video at the bottom of this write up. Reassembly is the reverse Here's a photo of the new filter installed, you'll be able to see where the tabs are more clearing against the yellow OEM plastic Once the assembly is re-installed, I turned the engine over a few times to help build up fuel pressure. I did panic when the car stopped turning over but I could hear the fuel pump making a noise. It eventually started and has been fine since. Found my 'lucky' coin underneath the rear seat too The Youtube video can be seen here: https://www.youtube.com/watch?v=uLJ65pmQt44&t=6s
    • It was picked up on the MOT/Inspection that the offside front wheel bearing had excessive play along with the ball joint. It made sense to do both sides so I sourced a pair of spare IS200 hubs to do the swap. Unfortunately I don't have any photos of the strip down but here's a quick run down. On the back of the hub is a large circular dust cover, using a flat head screw driver and a mallet I prised it off. Underneath will reveal a 32mm hub nut (impact gun recommended). With the hub nut removed the ABS ring can be removed (I ended up using a magnetic pick up tool to help). Next up is to remove the stub axle, this was a little trickier due to limited tools. I tried a 3 leg puller but the gap between the hub and stub axle wasn't enough for the legs to get in and under. Next option was a lump hammer and someone pulling the stub axle at the same time. After a few heavy hits it released. The lower bearing race had seized itself onto the stub axle, which was fine because I was replacing them anyway. With the upper bearing race removed and the grease cleaned off they looked like this The left one looked pristine inside but gave us the most trouble. The right one had some surface rust but came apart in a single hit, figure that out?! I got a local garage to press the new wheel bearings in, reassemble was the opposite and didn't take long at all. Removing the hub itself was simple. Starting with removing the brake caliper, 2x 14mm bolts for the caliper slider and 2x 19mm? for the carrier > hub bolts. I used a cable tie to secure the caliper to the upper arm so it was out of the way, there's a 10mm bolt securing the ABS sensor on. With the brake disc removed from the hub next are the three castle nuts for the upper and lower ball joints and track rod end. Two of these had their own R clip and one split pin. A few hits with the hammer and they're released (I left the castle nuts on by a couple of turns), the track rod ends gave me the most grief and I may have nipped the boots (oops). Fitting is the reversal and is very quick and easy to do. The lower ball joints are held onto the hub by 2x 17mm bolts. The castle nut did increase in socket size to 22mm from memory (this may vary from supplier) The two front tyres weren't in great condition, so I had those replaced with some budget tyres for the time being. I'll be replacing the wheels and tyres in the future, this was to get me on the road without the worry of the police hassling me.
    • Yep, the closest base tune available was for the GTT, I went with that and made all the logical changes I could find to convert it to Naturally Aspirated. It will rev fine in Neutral to redline but it will be cutting nearly 50% fuel the whole way.  If I let it tune the fuel map to start with that much less fuel it wont run right and has a hard time applying corrections.  These 50% cuts are with a fuel map already about half of what the GTT tune had.  I was having a whole lot of bogging when applying any throttle but seem to have fixed that for no load situations with very aggressive transient throttle settings. I made the corrections to my injectors with data I found for them online, FBCJC100 flowing 306cc.  I'll have to look to see if I can find the Cam section. I have the Bosch 4.9 from Haltech. My manifold pressure when watching it live is always in -5.9 psi/inHg
    • Hi My Tokico BM50 Brake master cylinder has a leak from the hole between the two outlets (M10x1) for brake pipes, I have attached a photo. Can anyone tell me what that hole is and what has failed to allow brake fluid to escape from it, I have looked on line and asked questions on UK forums but can not find the answer, if anyone can enlighten me I would be most grateful.
    • It will be a software setting. I don't believe many on here ever used AEM. And they're now a discontinued product,that's really hard to find any easy answers on. If it were Link or Haltech, someone would be able to just send you a ECU file though.
×
×
  • Create New...