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Dual Nozzle SMC kit max boost run?

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CopGn

New Member
Joined
Mar 17, 2003
Messages
420
With the bigger turbos how much boost have people run on 93 octane? How much more do you guys think the Dual Nozzle will let you run? If you can please post your setup. Asking as the sweet spot for the turbo I am looking at is 24lbs and I am building a fast street car and don't want to be limited to race gas.

Eddie
 
My results with 91 octane are in my sig. I gained about 4 psi boost and 3 degrees timing with the dual vs single nozzle setup.
 
I can run 24 psi and 23* timing on 93 and not get a single frame of knock.
 
I think it would be related to your heads and cam.

More boost likely with stock heads and cam.

It will all be relative to your mod. level.

Mine is stock heads and cam and 24psi. at 20* timing staged 2 nozzles with a TA62 turbo.

SMC pump and M10 first stage and M15 second stage nozzle on at 10psi. and 18-20 psi. programmable when I feel like playing with it.
 
26 lbs. of boost - 27* of timing on 94 octane and smc alky
 
slightly over 23 pounds with 23 degrees of timing here. Absolutely no knock. I could probably tweak a little more out of it, but I'm hapy where it is now, it's at a safe level, and you can only do so much testing on the highway :)
 
Originally posted by CopGn
With the bigger turbos how much boost have people run on 93 octane? How much more do you guys think the Dual Nozzle will let you run? If you can please post your setup. Asking as the sweet spot for the turbo I am looking at is 24lbs and I am building a fast street car and don't want to be limited to race gas.

Eddie

You didnt post what mods, performance levels you are trying to reach...adding an additional line really isnt an issue unless you require more volume..and there comes a time where you get into this particular issue. Usually in the 11.50 range at 116 or so.

What good is it to run 28 PSI boost on a car that runs 13 second quarter miles..a bunch of those running around. I've witnessed a GN run 14.0 at 26 PSI boost. So it aint bout the boost..but making power.

Post your goals and mods..

Julio
 
I will probably be buying the PT 67. I will be run with 3200 9", and front mount. I was told the turbo really starts to make power at 21lbs and will be going strong to 27lbs. I don't want to push the stock bottom end to 27lbs but think it can hold 24lbs. I know race gas and proper tunning will get it there but I don't want race gas to be my only option.
 
The boost power issue has a lot to do with how well the motor breathes. if your running stock heads and cam, its a moot point cuase 24 PSI equals 24 PSI no matter what turbo. Now if the flow is opened up and you can utilize this extra air flow..thats when this issue of boost arises as far as detonation control. Heads and cam will have the greatest effect.

Once you really start making power..and want alcohol to have a shot, you need to increase the volume of alky through your motor. It is my belief that the little pump in the SMC kit isnt capable of delivering the volume needed to sustain a high horsepower application. Not putting it down..I think of it like a TA49 turbo..it gets you into the 11's. The shureflow pump is better suited to handle the larger volume and a larger container for the added flow will also be required. You have to rethink your wheel :) and how you apply it. there may be exceptions to the rule as in everything, but up to now, documented ET's dont lie.

I know , I know, this requires a lot more planning and thinking..so does keeping the motor from knocking and making power. A $150 DIY kit is not intended for this.. a twin/triple/progressive type system is more in line... which way.. no one knows..we're all stuck in the 11's :) but not for long

Look at the video I posted, I'm running over 100 PSI alky on twin M10's and zero bogging or transitional knock. Doing this kind of pressure on a simple "turn it on at 10-12 PSI", you would have had rich pop from the motor.

;)
 
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