detroit_903

iTrader: (8)

Okay heres the deal I have a 94 lt1 with a sts kit. The car is a m6. I'm trying to launch the car on boost from a dead stop. I have the boost set at 5psi Only problem is when I rev the car up and hold it at 4k rpm the boost gauge shows no boost. Shouldnt it be reading 5psi on the gauge?? Cause you would think the turbo would be spooling at 4k. Anyone know what the problem could be?

smoke20

iTrader: (2)

the turbo will not create boost until it is under a load, you will show no boost with just rpm and a idle or with clutch in. you will need what i think they call a 2 step to get your car to boost. dont flame me if im wrong.

detroit_903

iTrader: (8)

Yeah but the 2 step basically does the same thing right? If the car is held at 4k rpms the turbo should be spooling with or without a 2 step. Unless I have to hold the rpms longer

RealQuick

iTrader: (14)

A two step is like a rev limiter. If the 2 step is activated at 4k rpm, then it acts like a rev limiter at 4k rpm and creates a miss...which loads the engine and spools a turbo. Free revving like you do doesnt load the engine up.

ddnspider

iTrader: (26)

actually i found out a few weeks ago that you can in fact load the motor and build boost from a stop without a 2 step.i friend was nice enough to show me,i was sitting in the passenger seat,he did a mix of gas break and clutch and i watched the boost gauge climb to ~4psi while we were sitting there,lol.It just takes finess i guess

RealQuick

iTrader: (14)

good way to burn out your clutch in a hurry...

ddnspider

iTrader: (26)

meh....spec 5 clutch here,it didnt seem to mind it at all.

SSnakekiller

iTrader: (8)

Get yourself a 2-step, you won't be sorry, and you will cut nasty 60' times with it

longrange4u

iTrader: (2)

2 Step causes your engine to miss.... thus delaying detonation causing the load. Two things... a two step without something that throws your timing will only get you into 1-2lbs of boost (That is still not bad) and the other is... DO NOT get a 2-step if you still have Cats. (Raw fuel on cats = Hot melted cats being shot through your turbo).

I love my 2-step... nothing like launching at 5200RPM on slicks with a 2-step.

detroit_903

iTrader: (8)

Msd came out with a 2 step module threw summit racing. Would that work?? I'm running no cats by the way with my sts turbo. I basically just want to leave off the line with boost. Maybee that's why allot of members are not getting good 1/4 times with these kits. Launching on boost would defently cut lower 1/4 times. So basically the two step is activated on a switch you turn on - rev the car up and as soon as you dump the clutch it shuts off the two step? Also you mentioned about throwing off the timing?? I have a stock engine with a safe dyno tune. This wont throw off the tune will it??? The guy said throwing off the timing will throw the tune off.

longrange4u

iTrader: (2)

No... temp retard of timing causes more fuel in exhaust = more boost. This is a challange with all turbo manual cars.. I dont know about the MSD... I have heard that is a race only setup. Mine is a Harlan 2-step.

My 1/4 mile times werent bad... and my best 60' was 1.51. This was on stock wheels with just ET streets wrapped around them... I would like to try with some lightweights 10.5" in the back. I think I could see 1.3-1.4 60' with my suspension tuned in.

Turbo LS1 SS

iTrader: (7)

u can also keep blurping the throttle continuously and that will have u leaving out of vaccum. it takes practice to get it right and to leave at ur desired rpm...but it is a temp fix.

fastlt1

iTrader: (4)

Do you have the 2 step and a timing retard? If so how much boost you launch at? Thanks.

longrange4u

iTrader: (2)

Nope... just the 2-step right now. If I want to launch in boost (more than 1lb) I will have to figure that out.

trtturbo

iTrader: (25)

Jared, when we get done, that may change. We made some changes on a truck and it would stall to 6psi when before it wouldnt.

RW99

Given the extra distance to the turbo, does a two-step work just as well in an STS system as it does in a front mount?

NYSS Guy

iTrader: (1)

It works for me. I can build about 2 psi on the line. The problem I am having is traction!! But it does work. Ironically, my 60's have sucked since I got it....I can't get my Mickey T drag radials to stick at our great local track (moroso).

fastlt1

iTrader: (4)

I heard Moroso Sucks.

detroit_903

iTrader: (8)

So A 2 step will not affect my tune correct?? Cause I have a stock engine with a safe tune for the turbo. Will I need to have the car re-tuned. I heard something about the timing and I remember the guy said not to mess with the timing or it will throw the tune off. I was thinking of buying the msd 2 step with the soft touch rev limiter

NYSS Guy

iTrader: (1)

My 2 step didn't have any effect on my tune. It will work fine on the stock motor, as long as you keep the cats off the car. It's really amazing how much easier it makes it to launch the car. And it becomes a lot more consistent.

And fastlt1, Moroso does suck!!