need nitrous help for my 408

**q8LSX** · 08-23-2008, 05:52 AM

were putting a 408 on a yukon and i want to figure out how much spray i can run .... i am thinking of shooting 200 to 250, can i spary more?

**LS2Tuner** · 08-23-2008, 07:45 AM

First off we need alot more info to answer your ?.

What is in the 408. . . . . . . . . . ?

crank
rods
pistons
ring gap
cam
head gasket's
etc.

Also what type of fuel system do you have?

Stock engine management?

Welcome to the site!

**q8LSX** · 08-23-2008, 12:24 PM

i changed the pistons from 408 to 427
afr heads 66cc
ring gap 30
cam not sure yet but no less than .600lift
fuel 98octane
lsx block

**LT1 > LS1** · 08-23-2008, 12:53 PM

if its got a forged crank, and forged rods, it should be good for a 250 shot.

remeber, you need to pull a good bit of timing out when on 98 octane

**q8LSX** · 08-23-2008, 01:47 PM

is it still safe to spray over 300

**LS2Tuner** · 08-23-2008, 02:02 PM

Originally Posted by q8LSX

is it still safe to spray over 300

You still haven't answered enough about the motor to really answer that.

**Frost** · 08-24-2008, 06:24 AM

Americans guys reading, please keep in mind that their 98 is like our 93 octane...

Thread: need nitrous help for my 408