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Jun 17, 2004 | 07:22 AM

91z28350

Thread Starter

Junior Member

Joined: Jan 2004

Posts: 47

Likes: 0

From: orlando, fl

Car: 1991 z28

Engine: 5.7

Transmission: 700r4

confused

hey guys I'm a lil frustrated I just put Nitto 555r's and ram air boxes on my 91 Z 350 and for some reason even after launching at 1500 with no tire spin my car runs what it ran back in december (14.2) same 60 ft (2.09) but a 9.01 1/8th time (2 tenths faster than december. Grant it it was 90 degrees 100 percent humidity and in december is was 50 with 0 percent humidity. I dont know is wether that much of a difference? I do get the service engine light sometimes wehn cruising at a steady rpm could it be a sensor? Im confused.

Jun 17, 2004 | 09:05 AM

Keith_Indy

Member

Joined: Sep 2003

Posts: 273

Likes: 0

From: Indianapolis, IN

Car: 87 Firebird Formula

Engine: 305 LG4

Transmission: Auto

It can...

WARNING: YMMV

http://www.staginglight.com/guide/weather.html

Quote:

In short, heat slows you down, humidity slows you down, and dense air pressure helps speed you up. After a year of record keeping with the gauges, I have come up with the following simple rule that works for my car:

--------------------------------------------------------------------------------

Temp goes up 3 degrees, ET slows .01 seconds
Barometer goes down .01-.02, ET slows .01 seconds
Humidity goes up 5%, ET slows .01 seconds

By this guys estimates you should have ran a 14.53 based on the conditions you described. So you "gained" about .33 seconds with your mods. The real test to see if you ET improves will be when conditions are better.

Last edited by Keith_Indy; Jun 17, 2004 at 09:14 AM.