do's and donts of the legend sr20det

jimmy crowley

jimmy crowley

Rouge Dori s15
ok,

im looking for everybodys 10 cents worth with the do's and dont's to a healthy sr20det engine

example

running 1.5 bar boost on a complete stock motor is not going to end well

fitting a z32 afm,am injectors,nistune ecu(remap) and a lil extra boost is ok.

baffled sump good/bad/unnecessary

quality oil cooler vs non branded cooler good/bad/unnecessary

:thumbs:
 
depends on the oil and the kind of use the car gets. Im not too sure about the ins and outs of the oil pump on the SR's (despite owning one) - but the way I imagine it :

1.car gets used as a daily and needs to be on the move from when its started

- Oil cooler with thermostatic valve required: extra pressure of putting cold, decent oil (15w50) through the larger loop + cooler under normal driving conditions may result in higher load on the oil pump which could cause problems.

2.car is a track bitch and gets warmed up to operating temp on idle before moving

-Oil cooler with filter relocation fine, no thermostatic valve required because oil pump is capable of running operating temp oil through loop comfortably.

It is recommended to either increase the capacity of the sump, or change the oil pickup from the restrictive S13 pickup (the mouth on the funnel itself can be blocked by a very smal dent in the sump) to an S14/15 pickup, which has a widened mouth, less likely to become blocked and starve the engine of oil.
 
jimmy crowley said:
ok,


example

running 1.5 bar boost on a complete stock motor is not going to end well


:thumbs:
Click to expand...

Im running 1.5 bar through my gt2871r 0.86 on a totally standard unopened engine and have been for 2500 miles now with no problems:nod: all down to the mapping and maintenance imo.
 
jimmy crowley said:
stock as in no ecu etc
Click to expand...

No mate,stock as in an unopened engine,just bolt on parts.Im running mine with a power FC:thumbs:

Hudson. said:
How do you guys find the 2871R's? Been thinking of getting one.

What power are you running, responsive?
Click to expand...

I have the gt2871r with .86 housing,on my sr it doesnt hit until 3900 rpm but when it does it hits pretty hard:D the .64 version would spool quicker but I prefer a little lag but a harder "punch" if you know what I mean:) Im hoping to get an apex 2.2 stroker kit soon and a decent head set up though which should hopefully help me spool a little quicker, but still flow better at the top end and have a decent punch:thumbs:Although Il probably just end up getting a 3076 .64:wack:
 
so how many people use a different sump? Is oil surge ever a problem?

I would of thought its not too bad as it has the plate between lower sump and upper sump which would help to stop oil running about everywhere.

Think I will get one just for the extra 1 litre oil capacity.
 
kingj said:
No mate,stock as in an unopened engine,just bolt on parts.Im running mine with a power FC:thumbs:



I have the gt2871r with .86 housing,on my sr it doesnt hit until 3900 rpm but when it does it hits pretty hard:D the .64 version would spool quicker but I prefer a little lag but a harder "punch" if you know what I mean:) Im hoping to get an apex 2.2 stroker kit soon and a decent head set up though which should hopefully help me spool a little quicker, but still flow better at the top end and have a decent punch:thumbs:Although Il probably just end up getting a 3076 .64:wack:
Click to expand...

Mine has the .64 housing and is great, responsive and pulling hard from 3k ish.
 
I've got the redtop sr and I've heard about problems with the oil pickup. Would you guys recommend changing it to the s14 one? Is it worth pulling the lump out for or can it be done in situ? Cheers
 
If the engine and it's surrounding components are in good health and maintained well, then like most Japanese 2.0 twin cam engines it will handle 1.5 bar (21/22 pounds of boost pressure) no problem fella.

Some will produce around 350-400 depending on FMIC setup, turbine/compressor housing, ignition system health as well as general engine compression health

I've tuned several (see my site by clucking the link below and then scrolling right down and clicking my new TAG words GT2871R which will display a small sample tunes of what to expect ). This will give you a very good idea as to what that popular Garret blower will do on performance wise on a twin cam 4 pot lump.

It's a nice turbo well matched to the CA18&SR20 and very popular on the street/fast road/drift application and good value for money

I've even had a few b18 turbo Honda guys now opting for this on their high compression turbo conversions and their all seeing over 400@just 1.25bar (around 17/18 pounds of boost),

One things for sure you won't be disappointed with the performance
:)

Z32 n 740cc injectors are a must though ;) along with a propa clutch
 
jimmy crowley said:
i heard if the engine is running right and tuned right these are not needed and in turn can harm something else when the rocker cant give way??
Click to expand...

thats not entirely true, rocker stoppers stop the arm coming off if u say miss a gear or sit too long on the limiter or if the rocker isnt shimmed perfectly , id rather a rocker stay in position than fall off at 7k+ personally, id say the majority of tuned sr's use stoppers....has to say something for them
 
jimmy crowley said:
i heard if the engine is running right and tuned right these are not needed and in turn can harm something else when the rocker cant give way??
Click to expand...

:thumbs:

7200rpm limit and NEVER broken a rocker, on HKS 264 step 2 cams too. i dare somebody to claim i dont beat the shit out of it.

trick to SRs? Cooling and breathing, thats it. I've had one SR let go on me in 10 years of running them... if you are blowing SRs, you are doing something wrong. 1.5 bar on a standard lump is fairly pointless, im not suprised by steve, since he likes chasing numbers.
 
Mitto.. your comment made me smile... (yet another) I dont need to chase numbers dude as the engines make what it makes.. End of fella :)

The majority of Japanese twin cammed engines providing they are healthy and well maintained, are perfectly capable of 1.4/1.4bar of boost with the CORRECT turbo charger and good tuning and setup... and this as been proven time time and time and time again by many tuners worldwide for yeeeeeaaaars man..... with Street, Track, Fast Road AND Drift Cars... ;)

If a rocker is gonna go its gonna go and there is basically Sod all anyone can do about it.. At the end of the day within this type of motorsport these engines are battered and under extreme loads and in many many cases bouncing constantly off the limiter for an extended period of time.. There is only so much amount of maintenance that one can also give and there is also only such much amount an engine can take...

When its time, its simply TIME!! Some folk, in fact the majority are, extremely luck that they have never had a rocker arm go.. When tuning ive personally NEVER had a rocker arm go on me or my own S14a SR20's...
 
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