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Old 02-08-2013, 01:07 PM   #1
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Smile Getting the most power NA out of a 20e?

Probably dumbest question and someone will complain.

But any ways of just getting that little bit more power out of the motor?
Shes my daily and I'll be taking her for a couple track days soon, just a curious question.
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Old 02-08-2013, 01:21 PM   #2
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how deep are your pockets mate?


i mean the obvious is air filter exhaust etc
BUT theres quite a lot you can do to NA motors to get more power from them look what the Honda boys do innit
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Old 02-08-2013, 01:25 PM   #3
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Yeah I've changed my exhaust, only has a pod filter so no gain from that.

Bigger throttle body make much difference?
I know extractors aswell will
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Old 02-08-2013, 02:03 PM   #4
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Check the threads I've made, there is one about making a cold air box and intake - a mod that should be done after fitting a pod filter

...but to be blunt, a 20E is the entry level engine in the RB range, it was never designed to make any real power. From the port sizes, to the ECU tune etc.
If done right, an exhaust may give you a gain. Same with the intake side - cold air box and a free flowing intake pipe may give a small gain.
There isn't a whole lot you can do that's worth the money for the power gained. If you want to modify an RB n/a, go with a 25DE or even a 30E (or convert it to a 30DE).
Just my 2c
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Old 02-08-2013, 02:08 PM   #5
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Also, you will probably have serious brake fade on the track... the brake set up that comes with a 20E engine just isn't designed for the track. The diff and suspension will not exactly help either if they're factory
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Old 02-08-2013, 02:08 PM   #6
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Taking out weight and improving handling may give better 'bang for buck'...
You are into old school tuning otherwise - as above posts plus maybe aftermarket cams. Last straight six I tuned was 20 years ago (Triumph TR) and I did increased compression, polished head (not considered best practice now) open velocity stacks, tubular exhaust manifold etc but one of the best mods I did was to lighten the flywheel. Motor just felt more responsive.
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Old 02-08-2013, 02:58 PM   #7
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Easiest and cheapest option is to fit the RB25DET lump, other than that as said drop as much weight as possible, as far as the engine goes a decent intake setup and carefully selected exhaust will maybe gain you 5bhp, cams and a porting job possibly 8-10 bhp, raise compression and rev limit possible 5-10bhp with a remap, you can always drop the final drive ratio for better acceleration.
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Old 04-08-2013, 01:37 PM   #8
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NA straight 6's are for light cars, old retro datsuns etc. and they can perform very well in such vehicles, but once you're getting into heavy cars like the R33/soarer etc. even 3.0 na motors dont offer much in the way of thrills.. Alfa have a nice 3.0 V6 saying that which performs well in the gtv, but its a tuned engine, and a very light chassis. Even a highly tuned engine like the BMW's vanos lump doesnt go that well.

For some sideways action it might suffice, with the right suspension setup - so concentrate on that, money aimed at performance is money wasted. Better saved and going turbo when you can afford it. An RB26 swap will probably prove cheaper than gaining a genuine 40hp more out of your n/a 2.0.

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Old 05-08-2013, 01:45 AM   #9
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You could bump the timing a bit. Easy to do and free. It won't exactly make it lose traction in 3rd or anything but better than nothing.

I have one of these as a daily. Could use another 20-30 bhp and an extra cam. They shouldn't have dropped the 20DE for the R33.
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Old 05-08-2013, 09:25 AM   #10
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it'll only be on a basic drift practice pad. Its my daily so I would only be stripping the rear for the day.
Just wanted that little extra for her going sideways aswel as daily driving.
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Old 05-08-2013, 09:56 AM   #11
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Meth injection can add a little bit of power and its a modification that can be used on the next engine after an engine swap or even moved to another car which is handy.
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Old 05-08-2013, 08:51 PM   #12
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Some inspiration for you!

http://youtu.be/QasN4627pKs
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Old 19-08-2013, 08:33 AM   #13
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Question RB20E - WHAT FILTER DO YOU HAVE ??

My bad posted in the wrong place :/ - Martin..

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Old 17-09-2013, 04:17 PM   #14
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Stick a 100bhp shot of a fogger nos kit on it works wonder's ;)
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Old 17-09-2013, 05:29 PM   #15
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Stick a 100bhp shot of a fogger nos kit on it works wonder's ;)
This man speaks the troof!
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