Performance Questions About Gears and Exhaust

[1990 quasar blue]

Originally Posted by Lowflight

So, I want to do as many mods as possible without adding headers right now.

I wonder how much they will reduce the benefits of the other mods. Especially porting the heads.

Originally Posted by Hammer

From what I can tell, looking at all the times on the Registry, with 3:45 gears, your best 60' times are going to be around a 1.95. All the Z's running 1.6's to 1.8's (modded or not) were running 4:10's. I think this would be where you pick up your E.T.'s.

Not true John. I pulled a hellacious 60 foor in Peavens stock geared car at BG this past year. And in my car, I got some good 60 foot times with the 3:45 gears on stock tires. What really matters is track prep, and being able to just flat out be lucky.

[UKZR1]

I have the old style B&B's running on a 368 with no cats, jeal headers and xpipe. I have just received my 410's from Marc and hope to get everything sorted in the next few weeks. One of my aims is to make the car driveable in 6th gear at 70-80mph without making my ears bleed with that dam resonance. At the moment I tend to drive without using 6th unless cruising over 100. So I am hoping for a slight mpg improvement - a good thing as fuel prices are now $8.46 for a US gallon

[blackjack]

im planning to use cats with my headers,as im sure they will cut resonance to an acceptable level,without eating too much power...i have 4:10 right now,but one of these days i want to try 3:73 or 3:90,to get a more ''civilized'' first gear
bj
91/1735