Guest jjohart Posted October 30, 2003 Share Posted October 30, 2003 I am not getting straight info on whether I need a JCW chip upgrade for my 83 Turbo 280ZXT 2+2 (adding a 28"NPR and 3" exhaust for under 300bhp, I guess), or whether I can get by with a fuel pump, a fuel progressive control unit (I already bought this anyway!) and maybe an air/fuel computer. What I don't like about JCW is it's a lot of money up front, and I'll never sell the same product on Ebay when I sell the car someday! What I don't like about Air/Fuel computers is unknown, but it seems complicated, potentially more subject to glitches, and possibly less reliable. Any comments appreciated! John Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted October 30, 2003 Share Posted October 30, 2003 Are you talking about Jim Wolf Technology (JWT)? If you are running less than 300hp, you don't need to fork over the $1000 or so. You can do that on a factory system with minimal tuning. Just get a Bosch pump or a high pressure Walbro, install the I/C and turn up the boost. Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted October 31, 2003 Share Posted October 31, 2003 You could also do the mega squirt, although I want to see some people put down some really good numbers with one first. HINT HINT. Quote Link to comment Share on other sites More sharing options...
Jwink25 Posted October 31, 2003 Share Posted October 31, 2003 I'll be putting one on my car. But, I don't think it will see the road until mid next year. Jason Quote Link to comment Share on other sites More sharing options...
Afshin Posted November 1, 2003 Share Posted November 1, 2003 As already mentioned, you can easilly get to about 300hp with the stock system. All you need is the intercooler, turn up boost, exhaust and intake system with a good fuel pump and injectors. this should get you in a realistic stable 270-300hp range. After that point the injectors will be the first limiting factor. So for over 300hp you will need injectors that flow over the stock 260-280cc/min. With larger injectors you will then need to address the fuel management, you can modify the flap position on the AFM to account for larger injectors (not perfect, but can work), JWT, aftermarket ECU and a few other options. I believe SleeperZ set up is a 300zx ECU with a self modified 300zx air mass sensor to account for the 370cc merkur injectors resulting in over 300 Hp at the wheels and over 400ftlb torque. My advice is to get the intercooler and exhaust system in along with a good fuel pump (do search, some popular options are walbroo, MSD, bosh). Make sure your injectors are good (BTW the cheap non japanese non nissan ones for 50-$60 are crap, they don't atomize the fuel properly and flow very unevenly(I know this for fact). This can be a serious problem if you start pushing the injectors close to maximum safe duty cycle (80-85%) which should be around (ball park) 280hp. I think the quality of the injectors account for why some people have been able to push the stock system much further than others. Once you have the car running "right and nice' then as long as you finished upgrading the suspension/brakes... then go for over 300hp. Again no need for aftermarket ECU at this point. Lastly a T3/T4 upgrades is also very nice, but may not be the best place to put your money until you do the other upgrades first or if your current T3 is going bad. Hope this helps. Quote Link to comment Share on other sites More sharing options...
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