getting SR20 to 350-400 whp - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

05civse · 05-24-2007, 07:07 PM

So here is the deal, I have an S13 with a S13 blacktop SR20. The car used to feel fast for the first month that I was driving it, then I got used to it. I know it hasn't actually slowed down because it is still faster than the cars and bikes I raced when I first swapped it in. It has a built head with stock cams, stock bottom end, big FMIC, 3" turbo back exhaust, ect. (I’ll post the full list). I want to know some tried and true steps to make over 350 whp without too much boost (below 25psi). I plan on using a power FC for E/M. I would like to use the manifold it has on it (done a lot of custom work to it), but I could change it if need to.

I was looking at GT2871R's but haven't found any dyno graphs of them clearing 350hp. I know I don't want some huge turbo if I can get away with it. Basically, If you guys could list all the parts I would need (inj. size, turbo, ect.) to make a setup that can put down the numbers I am looking for that would be awesome.

Engine mods:

Engine:
 ’94 Blacktop SR20DET from 180sx
 XS Power turbo manifold (highly modified)
 XS Power turbo extension
 Crower Valve springs
 Crower Titanium Valve spring retainers
 Exedy stage one clutch
 Greddy V-SPL front mount intercooler
 Greddy aluminum oil pan
 Cometic headgasket (1.2mm I believe)
 New exhaust valve guides
 New valve seals
 Valve grind
 Ported head
 Head surfaced
 HKS SSQV blow off valve
 Walbro 255 LPH fuel pump
 300zx fuel filter
 Manual boost controller
 ARP head studs
 TC Sportline rocker arm stoppers
 Megan racing 3” flex down-pipe
 Megan racing 3” test pipe
 Motoria 3” cat-back exhaust

Thanks for the help!

05-24-2007, 07:07 PM	#1
05civse Leaky Injector Join Date: Jul 2005 Location: out and about Posts: 125 Trader Rating: (0) Feedback Score: 0 reviews	getting SR20 to 350-400 whp So here is the deal, I have an S13 with a S13 blacktop SR20. The car used to feel fast for the first month that I was driving it, then I got used to it. I know it hasn't actually slowed down because it is still faster than the cars and bikes I raced when I first swapped it in. It has a built head with stock cams, stock bottom end, big FMIC, 3" turbo back exhaust, ect. (I’ll post the full list). I want to know some tried and true steps to make over 350 whp without too much boost (below 25psi). I plan on using a power FC for E/M. I would like to use the manifold it has on it (done a lot of custom work to it), but I could change it if need to. I was looking at GT2871R's but haven't found any dyno graphs of them clearing 350hp. I know I don't want some huge turbo if I can get away with it. Basically, If you guys could list all the parts I would need (inj. size, turbo, ect.) to make a setup that can put down the numbers I am looking for that would be awesome. Engine mods: Engine:  ’94 Blacktop SR20DET from 180sx  XS Power turbo manifold (highly modified)  XS Power turbo extension  Crower Valve springs  Crower Titanium Valve spring retainers  Exedy stage one clutch  Greddy V-SPL front mount intercooler  Greddy aluminum oil pan  Cometic headgasket (1.2mm I believe)  New exhaust valve guides  New valve seals  Valve grind  Ported head  Head surfaced  HKS SSQV blow off valve  Walbro 255 LPH fuel pump  300zx fuel filter  Manual boost controller  ARP head studs  TC Sportline rocker arm stoppers  Megan racing 3” flex down-pipe  Megan racing 3” test pipe  Motoria 3” cat-back exhaust Thanks for the help!