Nics & Eccs Whats The Difference?

[rbz31]

G'daY guys,

well i was just wondering whether anyone would be able to outline the key differences between the NICS system on the 86' to i think 88' RB20DET's and the ECCS system that started in 89'. I've heard about the differences in the size of the turbo (NICS has an extremely small turbo) and i was wondering what other differences there are?

Is it just a matter of the different ECU's being used?

Are the internals the same?

The stroke, crank and bore dimensions??

Any help would be greatly appreciated.

I have tried to search this question but there seems to be nothing in any otha the threads..

cheers

JT

[R31Heaven]

Turbo and intake manifold are about the only diff. When I got my GTS-X I could not work why everyone use to bag the nics as mine went fine, later found out mine had a R32 turbs on it

[rbz31]

hey...

fanx heaps for dat bro.... but what are you sure dats it??

cause i was havin a chat to sum guy from SSS and he was tryin to tell me dat da NICS has totally different internals and stuff.... i'm not sure whether or not he was jus tryin to get me to try n buy a silver top but he sure sounded like he knew what he was talkin bout....

anyone else have a clue....

[rbz31]

And yeah.... "R31Heaven" how did ur NICS engine go???

did u do much to it???

how much power was it good for??

Cheers

[R31Nismoid]

ECU's are also different

[R31Heaven]

With the R32 turbs 3" system standard intercooler and a SAFC i got 134rwkw. I have just put on a RB25 Turbs and FMIC, but havnt got it tuned properley. Hoping for around 170rwkw

[R31Heaven]

Arh Ok your talkin about the silver top ECCS not the redtop ECCS thats a different kettle of fish. I cant comment on the Silvertop. I do know they had a way better inlet plenum and may have differnet cams etc, so he may be right if they are talkin about the Silvertop. there is about a 20fwkw difference over a stock standard NICS. But as said above I got 134rwkw out my nics with just a R32 turbs and a good tune with a SAFC, so you can get some good power out of one. Their downfall is the pissy little turbo they run stock

[discopotato03]

Very small turbo and 12 runner inlet manifold - 2 feeding each pot and one with a throttle plate in it so that one could be closed at low engine speeds . At the time Nissan was trying to get some low speed torque out of a six with small 330 odd cc cylinders and low tech (ceramic turbine bush bearing) turbos .

The R32 RB20DET is the pick as they're not that expensive and all the goodies come std . You may also be able to put the late head/manifolds/turbo on an R31 donk if you don't want to change the lot .

What worked in the end was ball bearing Hitachi turbos with better response / better porting and inlet manifold design / more modern electronics ie ECU sensors and AFM . The later turbo for the early engine would be the best and easiest mod .

[R31Nismoid]

RB20 silver and red top heads are of different design also.

Can be a headache due to crank angle sensors among other things trying this.

I know, been down that alley twice on my old car

[rbz31]

well i'm asking all this because i was kind of forced to buy a NICS....

U see i have a 300zx and i wanted to get an RB into it.... searched for a frontcut for ages and i finally found a 200zr series 1 frontcut and bought it... I was jus wondering if now that i have the mounts the r32 rb20 should jus drop straight in and whether the gearbox that comes with this early model RB20DET is any good??

Anyone have a clue about this???

Fanx heaps guys u been heaps of help...

[rbz31]

Hey R31 Heaven.... How much boost were u running for 135rwkw??

R31 Nismoid how different are the heads and how hard are they to change??

cheers guys..

[R31Heaven]

RBZ31 I was running 10 psi

[rbz31]

Thanx

[discopotato03]

I did buy an R32 box ages ago , I think the only difference is extra ribs on the bell housing . All else looked identical .

Cheers A .

[Jago]

NICS also has butterfly plates between the intake manifold and the head, or somewhere in that region, supposedly they can cause problems with getting jammed etc.

Standard ecu also craps itself after 11psi and starts running all funny and keeps cutting out too. Pretty much gets stuck in "high rpm mode" or something, i can't remember all the nitty gritties but it has something to do with valve operation etc. I got rid of my nics quick smart, so quick that it was gone before i even first drove the car...

[R31Nismoid]

Hey R31 Heaven.... How much boost were u running for 135rwkw??

R31 Nismoid how different are the heads and how hard are they to change??

cheers guys..

as in they are not interchangeable easily, if at all.

Well... they "might" be able to but that means adapting the silver-top ECU to the red-top loom etc etc.

Its a mission

[degeko]

the r31 came out with 3 different rb20's the 2 redtops (nics and eccs) both 12 port head, and also came out with a silvertop in mid 89 only 400 odd made and were the experimental motor to be used in the r32 but still used the redtop ecu and wiring/CAS but had the 6 port head and the same 'o' injectors used in the newer silvertops, the nics had problems with the actuator that controls the butterflies in the runners, the bottom ends in all rb20's are the same just the heads are different, the redtop had more aggresive cams than the silvertop and are interchangeable

[rbz31]

Mate...

R u sayin dat if the bottom end of all RB20's is the same then it would be easy to change the heads on these blocks from the NICS to the ECCS and the only problem would be the loom???

Am i right??

Also is a r32 Turbo a direct bolt on for the NICS engine?? It should be just makin sure... Does it use the same manifold 2??

Anyone noe of some1 sellin a good R32 turbo cheap??

Fanx heaps guys.... Will post as ma 300zx enters the RB world...

Cheers

[R31Nismoid]

Also is a r32 Turbo a direct bolt on for the NICS engine?? It should be just makin sure... Does it use the same manifold 2??

use the search button, been done many times before.

[degeko]

yeah all rb20det blocks are the same except the GTS4 ive been told its a bit taller or something