FactoryFreak

iTrader: (2)

I got an 88 GTA 350 TPI A4.
When it was roughly stock (exhaust, weld prostars, ET streets, 2.77 gears), ran a low 14.
Dropping in a 3000 Stall Converter, 3.73 gears, Hoosier Drag Slicks, and a TNT 150 shot. Will have a window switch so i can launch on the bottle and shut off before I shift. I will also be porting out the plenum, possibly the manifold.
Just trying to get an idea if I can hit mid to low 12's with this setup.
Thanks to all who respond.

RSCamaroGuy92

NOS is inconsistant. I think you might see 12's, sometimes. Or you might see your rods jetting through your oil pan.
Just something to think about.

I think you have a strong base for a n/a car. I've never been a fan of nitrous, being a drag racer. Its too inconsistant and WAY too risky for my budget. I'ld hate to see $5000 worth of motor Die 'cause I gave it the bottle, but hey, if you want it, GO FOR IT

RSCamaroGuy92

4.10 gears seem to be the best "All around" gears for Our cars. They will run a quarter great, but still only run 2400 RPM in O/D at 65mph. A good friend of mine has that setup in his 89 bird, and it seems to work alot better than my 3.73's.

MelloYello

Nitrous is as consistant and safe as you make it. Talk to a tech representative for more info - that or do a search on the Power Adder boards.

No one should run 4.10s with an A4 unless they have either taller tires (like 28") or an engine combo that will pull high enough to make it through the 1/4 without topping out - Check the gear ratio calculator on this site.

I run high 12s with the mods in my sig and a slipping tranny - no stall or draglites for me. Assuming you're running the stock cam, I would get a 2500-2800 stall, 3.42 gears (you will run out of RPM with 3.73s with a stock tire height), box your stock LCAs and get relocation brackets.

P.S.- The window switch wont shut off nitrous during a shift - dont believe me? try it and find out - or you could search the power adder boards.

RSCamaroGuy92

Note the bold print on the words above. Quite possibly, this IS a taller tire, perhaps even a tub? Most ppl don't run 8" slicks, but hey, anything's possible

The 4.10's were on a 16" rim, I dunno about a A4, but he run's in the high 13's with 4.10's and doesn't top out at all. Another one of my friends has something like 4.88's in the rear of his TUBBED Pro Street 85 'maro. I don't know the exact gear size, but its something high like that in a custom 9" rear with Hoosier Slicks.

12 Sec GTA

Inconsistant? You must run a garbage setup with no control then.


Bottle pressure builds consistency. Maybe you're basing your comments on kits from 10-15 years ago when no one really knew what they were doing yet.. but they have come a LONG way.

new87

I second that I run 12's all day till I, note I blew my car up. I is a 305 on a NX kit with only the 100 shot stright off the line.

FactoryFreak

iTrader: (2)

Why wouldn't a window switch shut off the nitrous. It made to activate a circuit at a set rpm and then deactivate a circuit at a seperate rpm.
"The RPM Window Switch #121-8956, has two rpm adjustments; one to activate a circuit, while the other deactivates the same circuit. This is a great feature to deactivate nitrous before the engine's rev limit is reached." - straight out of a MSD catalog
Plus i will be running all the added safety features on my nitrous setup. For oil pressure and fuel pressure shut off switches.

chevyboy07 91

the combo yo uneed is a loose 2600 converter. Preferably a 9.5" converter.

Run a 150 shot..thats fine, but make sure its a WET kit.

With minor/dopey bolt ons and headers you will be in the 11's with a good tire.

I went 11.70's week in and week out with stock heads, stock cam, SLP runners, 46 psi of fuel, MSD ignition/coil and 1 3/4 SLP headers along w/ 26" Hoosier for a tire. STOCK tranny and converter!!

12 Sec GTA

Listen to Alex. He knows his ****.

Unless you're asking Adam's point of view... he has a tainted opinion of him

MelloYello

The window switch will shut off the nitrous at a certain RPM - I wont argue that, but during a shift your RPMs will drop within the window and the nitrous will engage during the shift, possibly causing even worse damage than if you had just let it do its thing. The only ways to turn off nitrous during a shift is to disarm the system before a shift and rearm it after the shift or to use a WOT switch and let off the gas for a shift.

FactoryFreak

iTrader: (2)

What if a WOT switch and window switch are used together on the same system. Would that work?
If that wouldn't then i guess i'll just have to beef up the tranny to take the punishment.

12 Sec GTA

you can use any number of switches in a series to arm it..


WOT - Window - momentary (push button) - SPST - etc.


it's all based on your personal preference.


I run an electric WOT circuit I made, an on/off (NX panel) and then a progressive nitrous controller...

chevyboy07 91

if you're running a manual car and WOT switch, assuming you let of the throttle for an instant while u shift, it will shut off for that split second. Manual cars really dont need window switches IMO. The WOT switch IS the window switch b/c u lay off the throttle then gat back in it.

Just MHO