Guest Anonymous Posted September 30, 2001 Share Posted September 30, 2001 i have an 81 280zx(auto, 2+2, with t-tops) all i want out of it is a 15 flat in the 1/4 it is a non-turbo and i don't wat to put a turbo on it, but here are m plans. 4N71B 4speed auto tranny K&N filter P79, Ported/polished, milled, and 3angle valve job 60mm TB and turbo AFM Crane Cam(280 duration, 460lift) ported/polished intake 3.90 LSD R200 diff. and an electric fan. Does anyone think that will get me to 15 flat? and if not hat else would u suggest? thanks in advance Justin Quote Link to comment Share on other sites More sharing options...
Drax240z Posted September 30, 2001 Share Posted September 30, 2001 Throw in a header and a 2.5" exhaust and I think you should be there! Sounds like it'll be a sweet street car. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 1, 2001 Share Posted October 1, 2001 Thanks Drax, can't belive i forgot the header but oh well. Quote Link to comment Share on other sites More sharing options...
GrayZee Posted October 6, 2001 Share Posted October 6, 2001 Just a quick side question.. how do you plan on controlling the 4N71B? it is computer controlled is it not? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 7, 2001 Share Posted October 7, 2001 Gray, the early 4N71B(81 maxima is the only one i am sure about) is not coputer controlled, the overdrive is elecrticly activated so u have to run a 12V to a toggle switch and your can turn the OD on and off, there is a very comprehensive post(actually several) about this on zcar.com, goto search and type in 4N71B swap or somethin like that and u will find it. Quote Link to comment Share on other sites More sharing options...
DAW Posted October 31, 2001 Share Posted October 31, 2001 Consider an N47 cyl head which on your flat-top piston short block would boost your compression from 8.8:1 to 10.0:1. That, with the suggestions others made re exhaust, etc., and your cam, would make a noticeable difference in performance, while allowing you to bolt onto your stock roundport exhaust manifold. By the way, the turbo torque convertors have a higher stall speed than the na cars. I was told by a trans shop that the torque convertors from the lockup convertor transes were different from the regular transes, that they had a different number of splines...I was in a trans warehouse a couple of days ago and slipped the torque convertor off a lock-up trans and onto a regular trans. There's no difference that I could see, does anyone know re interchangeability of torque convertors on JATCO transes? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 31, 2001 Share Posted October 31, 2001 About how many 15 second street cars are there on the street? Is 15 seconds pretty quick? I've never been to a track so always hearing about 12-10 second cars I'm not able to tell if 15 is still on the quick side. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 31, 2001 Share Posted October 31, 2001 rad, 15's would kill most all the rice cars but will not keep up with a corvette, or camaro maybe a mustang. Quote Link to comment Share on other sites More sharing options...
Guest Zpeed Posted October 31, 2001 Share Posted October 31, 2001 i was thinking with that sought of setup would get you into mid 14s... but maybe i was wrong.. i'm aiming for low 14s when i get my L28 setup up and running.. maybe its just me, or are most rice cars these days running 15s stock... Quote Link to comment Share on other sites More sharing options...
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