1) They're the same
2) The s13 SR is simpler to modify because there's no Variable Cam Timing or whatever it is, but strength-wise they're the same.
3) High port is better for overall high power, but the low-port with VCT got better idle performance, fuel economy and emissions.
4) I think you mean hypereutectic, and I don't think so, they're just high-grade forged steel.
5) Stock crank has been known to survive 500+hp
6) Redline MT90 or Shockproof Heavy gear oil will be fine to get the stock tranny to those levels. Its usually the driveshaft and axles that are weaker. You do always have the option of going to an RB25 tranny which can hold up to 700 hp or so.
7) Depends on what you want to rebuild? All the bearings are easy find parts and the seals are all shared with the US SR20.

Hope this helps and welcome to the forums!

 

actually. the black top has wider crank barings. ECU Wiring is alittle different too. different ecu and a few wires are in different pin location.

everything else has been answered.

 

When I mean rebuild kits I mean like all the engine seals, pistons etc.. or anywhere I could find those parts around here? Is there mailorder for that kind of stuff, like www.summitracing.com for domestics. I haen't checked out their sport compact section in a while but I dont htink its very good.

also, what kind of gas mileage do you guys get w/ a daily driven sr20?

-thanks a lot for the quick reply's

harold

 

search here and in google (froogle) for rebuild kits, summit won't have them but there are available..

i have always been surprised with the gas mileage out of my sr.. i don't think i have gotten under 30mpg yet, usually around 32-33 or so..

good luck.. and good questions..

 

actually. the black top has wider crank barings.

didnt know that! guess you learn something new every day!

 

i get around 25mpg.
you can contact nissan dealers for full engine seals and gaskets.
www.mynismo.com is one of them.

 

the blacktop and the redtop s13 wiring harness are the exact same . I`m running a red top harness on a black top. i gaurentee you they are 100% identical harnesses as long as they are both s13 harnesses. The only real differencebetween the redtop and black top is that the blacktop has a slightly bigger port . thats it. dont listen to what pple post until you have taken the time to research yourself. SEARCH sometime

 

so why do the redtop and blacktop s13's have different ecu's?

 

the only difference i've ever seen in the blacktop and redtops were the o2 sensor clip. other than that, the harness seems to be identical.

 

Mr 180sx. You're wrong. Maybe you don't have a blacktop.

Do you also know that there are Kouki RPS13 blacktop?? the ecu and wiring harness is completely different from a zenki and chunki blacktop.

I just remember that after a certin year. 94 (I THINK) they changed a few pins around.

 

i think we're all getting confused. When I say black-top, I assume s14 SRs versus red-top for s13 SRs. All the s13 SRs (red-top and black-top) are nearly identical with some said wiring changes, so its easier just to refer to all s13 SR20s as red-tops.

All my previous stuff was said assuming s13 versus s14

 

when you guys say 25 mpg and 35mpg do you mean street or highway? and mr. 180sx, where do you suggest i "SEARCH?" i've searched on this forum as well as multiple other forums. im still barley getting into imports and my resources are still limited. im not trying ot be a dick i just want to know where i can find some good info.

are they any sites like www.club4ag.com and www.mkiv.com for silvias(with just random articles and info)?

thanks for the help
-harold

 

when i said 25mpg, i mean i drive my car like a normal human being (shift around 3k rpm).
Now if i turn into ricer mode and smash the gas peddle everywhere I go. I'm sure i can get around or below 20mpg.

yes there are better forums than this crap. check out freshalloy.com and zilvia.net

 

yes there are better forums than this crap. check out freshalloy.com and zilvia.net

If you dont like it, please go somewhere else. We try to make this as good a forum as we can for taking care of it on our spare time, and having it trashed in public doesn't help us or our members. Consider yourself warned.

 

Not to bring back the dead, but I actually recieve more help on this forum than I ever did on the zilv.

 

oh yah the blacktop motor has the same bearings as the redtop. I just rebuilt and the part numbers were the same.