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RB20DE CAMS INTO RB20DET who has done it?

Dayna

By Dayna,
in Engines & Forced Induction

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Dayna Explorer

Dayna

Posted
Posted

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

Cubes Grand Master

Cubes

Posted
Posted

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

Dayna Explorer

Dayna

Posted
  • Author
Posted

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

Cubes Grand Master

Cubes

Posted
Posted

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

93RPS13 Enthusiast

93RPS13

Posted
Posted

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

Dayna Explorer

Dayna

Posted
  • Author
Posted

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)

armbrusb Proficient

armbrusb

Posted
Posted

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?

WazR32GTSt Grand Master

WazR32GTSt

Posted
Posted

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.

Dayna Explorer

Dayna

Posted
  • Author
Posted

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...
armbrusb Proficient

armbrusb

Posted
Posted

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 : )

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