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240Z | 260Z| 280Z | 300ZX (Past Z Cars) The original Z cars - ones that started it all.
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Old 05-04-2007, 07:33 AM
stephenp stephenp is offline
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drag day... 280zx

Well looks like today is the first time the 280zx will hit the track... Its an epic day for me. my $13,000 baby is going to lay day some real times...
I got the fuel pressure turned up to 58 at idle so it will be a little over 70 at boost ( walboro fuel pump, sard fpr, stock injectors) And I have the afm tuned accordingly... I'm still breaking it in so I'll be running about 10lbs (cam is recommended for 15psi+)... It still pulls like a son of a gun though... Im going to try and have video footage.... (we all know I'm a slacker though). My buddy said he'll go but you never know.
Hoping for a sub 8 pass (only 1/8th mile) but I might have to run more boost for that.... (should be easily capable of under a 7.5 after broke in and tweaked the tunning...)

Doubt me it encourages.....
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Old 05-11-2007, 07:51 AM
stephenp stephenp is offline
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Re: drag day... 280zx

Well I went..
Battery died on the way because I left the key on the whole way there,
I bent my front lower lip when backing off the trailer, blew my brake vacuum line off about 3 passes, blew my intercooler piping off 2 times, got no traction in1st at all, and found out that I cracked my number 4 injector feed line (yes the steel tubing). And on top of that only made a total of 9 passes.

But that doesn't mean it wasn't a riot. I was the only import (pure breed that is) other than a rx7 with a small block. Had no good times. Almost all of them I had sleepy reaction times (like around 1 second.)
But my actual reaction time wasn't that bad, but when I would try and launch it would do nothing but spin (alot of times with no movement at all).
But here is my drag time (pitifully my lowest time).

RT 0.6730
60' 2.4120
330' 6.2679
et@594' 8.6840
1/8 et 9.2109
1/8 mph 85.40


I'd like to know what I would have ran with good traction.

Anybody good with calculating drag times may be able to figure it out.
Also almost every pass I made I shifted to 3rd way to early. Oh and I was only running 7 psi..

Hope to get some projected (est) times for better traction. And for higher boost (ex 12, 15, 18, and 22 psi) (and yes I have the injectors to back the boost) (I'll be converting to 495 cc injectors and oversize aluminum fuel rail, and don't forget I have the sard fpr and can adjust to high fp(I was running 70psi at idle with the fuel curve adjusted accordingly).

Awaiting replys

alsop on the note of the manifold flange I still haven't received it and today is business day 8....
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