Plazmaman Plenum On Rb20 Worth It?

[Justa32]

looking at gettin a new plenum but ive had mixed views on it... some ppl say its a downgrade sum ppl say that its worth it.. little help?

[VB-]

i think its more the fact is an RB20, sure you might see gains but are they really worth the expense of a plazamaman plenum? not 20 bashing here, just my opinion

[Justa32]

fair enuff, im still very keen on it and if it help me join the 400 club then ill b gettin 1 ive just heard that it could b a down grade

[VB-]

downgrade as in power/flow? never heard of em on RB20's but only ever heard good things from his work on other cars

[bumble_bee]

gota a pic of this manifold?

i heard and believe that Greddy makes a manifold like this or use too...,

but stop making it becoz it starves the 5 & 6 Cylinder of air...

(i believe its unavailable anymore) correct me if im wrong....

so since the throttle body being at the front....

air would go from Cylinder 1....to...6

6 getting less air...

so really its not really worth an upgrade...

dont get me wrong....

i too was looking at a forward facing manifold too..

but not if its gonna cause problems or starvation on other cylinders...

plus if think about.................................

nissan Japan put alot of money into developing these engines....

SR's and the RB's..

but esp. the RB26

thats why they got independent throttle-body cables and a front facing manifold...plus for better response...

and thats why the rb20 and 25 have top-side facing manifolds...so air would be divided equally...

and SR have front facing manifold..but only coz they only got 4 cylinder..not 6!!! so 5 and 6 would get starved...

so the manifold would have bein tested & designed perfectly for ur engine...

but doing modifications to the engine would change the basic of these designs..but still....

id stay with the stock manifold..!!!!!!!!!!!!

or try fitting an rb26 manifold..!!!!!!!!!!!

the extra independent throttle-body cables would make a hell of a difference and and a better upgraded!!!!

i believe a few people on SAU have done this upgrade....

but thats just me....

Edited July 19, 2008 by bumble_bee

[Justa32]

ive spoken to sum1 who has actualy done the upgrade do a plazmaman and it was totaly worth it got an xtra 25rwhp without changing boost or anything + better mid range i think this will be on the cards for me

[ZILR-34]

well i have one on my R32 and i think its a good upgrade. i gained 30kw after i have my tune to get it running right. i say if u got the money go for it. but other people will say spend ur money on other things. have a look at my dyno sheet attached

cheers

bill

[R31Nismoid]

25rwhp and minor midrange for that cost? ... Not worth it in a million years for a street car or mild application IMO.

You'd barely notice that increase after a week, if at all.

You'd have far better gain by saving the money to put an RB25 in there or better parts elsewhere on the car

[Justa32]

well... as for me ive kinda ran out of things to do without opening the engine and going 4 another rebuild so this 30kw gain from the manifold looks like a great idea for me as i dont care much for the rb25 rite now and like to b diferent. Thanks 4 the post Jet ill definatly b putting one on in the next few weeks

[Adz]

Mmm id look and cam gears and a td06. Should get you to 260kw at the wheels. Anything above that on a 20 is a bit hard. ie lots of cash minimal returns.

[Adriano]

Agreed, or a .63 gt3071/76. I would only fit a plenum if your shooting for above 300rwkw, in which case you dont really need the additional top end power for an r32 gtst street car, as it will be wheelspinning well before the plenum will start to come into effect.

[Justa32]

i have cam gears and a gt3037s

[subie]

well i have one on my R32 and i think its a good upgrade. i gained 30kw after i have my tune to get it running right. i say if u got the money go for it. but other people will say spend ur money on other things. have a look at my dyno sheet attached

cheers

bill

Hi mate,

did u have an after market ecu or just the remapped stock ecu?

anyone know if we need any computer upgrade to work with this front facing plenum?

cheers

[The Dan]

25rwhp and minor midrange for that cost? ... Not worth it in a million years for a street car or mild application IMO.

You'd barely notice that increase after a week, if at all.

You'd have far better gain by saving the money to put an RB25 in there or better parts elsewhere on the car

You could have saved up some more money and bought a half decent car instead of that POS R31 too.

There is nothing wrong with RB20's you can still make 300rwkw quite easily and they rev a lot harder than 25's and 26's.

I'm sick of hearing everyone talk them down. It's an RB and a damn fine creation.

[Justa32]

id rather push my 32 than drive a whale

[The Dan]

id rather push my 32 than drive a whale

Now now, no need to be mean to the ugly kids!

[Nismo_Boy]

You could have saved up some more money and bought a half decent car instead of that POS R31 too.

There is nothing wrong with RB20's you can still make 300rwkw quite easily and they rev a lot harder than 25's and 26's.

I'm sick of hearing everyone talk them down. It's an RB and a damn fine creation.

I find it funny when some people on this site can disapprove of other people’s cars/motors, but if it were anyone else they would receive a warning.

To the thread starter, any power gain is a power gain. So if it makes you more power I can’t see it as a downgrade. Plus the standard rb20/rb25 plenum and cross over pipe looks damn right ugly.

If you have the money to buy the plenum and take full advantage of it by getting a tune, by all means go for it.

[The Dan]

I find it funny when some people on this site can disapprove of other people’s cars/motors, but if it were anyone else they would receive a warning.

To the thread starter, any power gain is a power gain. So if it makes you more power I can’t see it as a downgrade. Plus the standard rb20/rb25 plenum and cross over pipe looks damn right ugly.

If you have the money to buy the plenum and take full advantage of it by getting a tune, by all means go for it.

Not only that but if you were to upgrade even further, the plenum would/could be an even greater asset.

If you love your 20 and want to mod it, do it. I was told to not bother also when I was doing mine but I persisted with it and ended up enjoying the car even more because it could still dust a 600cc motorcycle.

Do what you love, stick with what you got.

[202.3rwkw]

hey mate,

I had one of the plazmamann plenums on my car. It was a RB25 and i have a mate with one on a RB20. we saw good gains out of both and while i cant quote his power increase post manifold, i can tell u i picked up 20rwkw and some nice throttle response.......... here is my graph.....

done on stock injectors and turbo too......

cheers

gc

[Justa32]

well its the last upgrade i can c my self gettin power out of, cams are done its been bored out computer turbo blaH blah blah i think the plenum is the best way to go if i can gain 30more kw @ the wheels that will definatly get me over the 300rwkw mark