first, 305rwhp is very impressive, that's like 360hp to the crank? very impressive, great car.vikesfankevin1986 wrote:To cut down on cost and make something special I have decided on going for the Holy Grail. I am going to try and reach 400rwhp. I see no reason I can't reach that with the mods I am planning. It will really help to save that few grand on turbos and if I decided to in the future I could slap on some upgraded turbos that will still fit a 4 bolt DP.
Anyways I think it would be kinda special and fun to say I have 400rwhp with stock turbos.
Here is where I am starting and here are my plans...
I have a stage 3 95 300zx TT
Upgrades-
Popcharger
Stillen 2.5 inch Catback Exhaust
JWT ECU Upgrade
at 13.5 psi I am making 305rwhp
since then I have had the cats cut out...
Downstairs I have
-RPS Max Street Clutch
-Fidanza Nissan Lightweight Flywheel
-Unorthodox 4 peice underdrive pulley set
-H.I. Overdrive Water Pump Pulley
and have SZ 3 inch 4 bolt Downpipes in the mail
They will be installed in the next week or 2
They say ud pulley gives 10-18 hp but I have the set and od pulley. Doing the math with the weight I could not imagine I would not get 20 or even as much as 30rwhp from that.
the other ud pulleys don't give you hp, most of it comes from the ud crank pulley, from what i understand. the od pulley is to spin the water pump accessory back to normal speeds, you won't see too many hp gains from that either.
Not sure what kind of rwhp the DPs will give me with cut out cats.
After that here is what I plan to do, in order:
-3 inch test pipes
-1 piece Aluminium Drive Shaft-they have been dyno'd for 18rwhp
-Upgraded intercoolers with 2.5 inch piping and Throttle Bodies-This combined with test pipes and down pipes have produced 35rwhp
-Water Injection
-Fuel Injectors
-Selin Dual Pop with MAF Translator-Dyno proven 30rwhp gain on cars that already had a popcharger.
-Boost Controler-Not sure how much hp is gained when you up the boost but I would like to push 15-15.5
-Exhaust Manifold...will do this whenever it seems to make the most sense.
This is my math
305rwhp
35rwph-DPs, TPs, Intercooler/piping/throttle bodies.
20-30rwhp-pulleys
15rwhp-driveshaft
30rwhp-dual popcharger
10? for upping the boost? It might be more?
415-425rwhp...That should hit the Holy Grail of 400rwhp on stock turbos.
i'm not sure how much money you would save by not going with upgraded turbo's, though.
the 2.5'' piping's aren't cheap, easily 1k, maybe 900. tb's are on sale right now at 3zc.com/store for like 275, but normally they're like 345-350?
the selin set-up is another 600 (with an extra jwt pop charger and a 2nd maf).
i'm not an expert like greg or seb over at specialty-z.com or anything, but i think it would just be easier (and cheaper) to get upgraded turbo's, maybe jwt530's, to achieve 400rwhp than to get the other supporting mods.

