Cutouts

[JwMonE99]

Finally got my duel electric cut outs installed today.
I got the Low-profile DMH ones.
They sound great, but ran into a few problems.
With the cutouts closed I have no problems getting on it, when its open it and I get on it, it feels like it sputters a little bit and I hear this big bang like someone is throwing a lot of rocks on the car.
Anyone else had this problem?
Also as far as performance wise, is it better to run with them open or closed?
I dont have access to a dyno right now to see which is better off.
Another question is, I will be doing some street tuning soon, should I tune with them open or closed?

[toi tyme]

I have the same kinds but just one.

I just hear them open and shut. No weird noises


Rattles in the pipes that just need to be tightened. But other than that I've had no problems with mine. Had them installed in may.

[Zapper2003]

I had a single on my LT1 and it made no crazy noises like that. Perhaps get the car up off the ground and have a buddy rev on it while you watch or somethin'.

[JwMonE99]

Well the reason why I have 2 of them is cause of the true duels.

[tatertot91]

Well the reason why I have 2 of them is cause of the true duels.

You got em before or after the x pipe?
Dunno bout the noises

[fbod91]

it should help with high end performance, from a stop it may hearm performance,

[wheeliE-maxx]

If something isn't mechanically wrong, your tune might just be too lean for the cutouts causing a popping/cracking

[Mr. Luos]

I would guess performance will be better with them closed.

[nillam1]

I would guess performance will be better with them closed.

I would think performance would be better when there open. JMO,

[Mr. Luos]

I would think performance would be better when there open. JMO,

Only if the motor has high compression, large cam, big heads, etc...

Stock LS1 with dual cutouts off the header collectors will be slower ET-wise with them open than with them closed.

[JwMonE99]

I have them before the Xpipe.
I have an LT1 with full bolt ons, I do have a wideband but it broke so ima need a new one so I can see what my AFR is.
I do think it is a little lean so I will just have to wait and see.
You think after the tune if I can get like a 12.7-13.1 AFR it would help performance from a dig at WOT?

[Mr. Luos]

You think after the tune if I can get like a 12.7-13.1 AFR it would help performance from a dig at WOT?

I really doubt it. It is gonna be lacking torque down low.

[tatertot91]

If anything for power i would have them after the X

[DIRTY JERZY]

carbon build up getting blown out ?

[86 IROC-Z]

Isn't back pressure a good thing?

Or whatever it's called.

[shady milkman]

Isn't back pressure a good thing?

Or whatever it's called.

delta pressure characteristics is what people should look at..not back-pressure

[Hi-Po]

My exhuast system is horrible. Because I has nah baq presure.

[86 IROC-Z]

delta pressure characteristics is what people should look at..not back-pressure

I honestly don't know anything about cars. I just throw random things out I hear in an attempt to sound smart.

20% of the time, it works every time.

[Hi-Po]

I honestly don't know anything about cars. I just throw random things out I hear in an attempt to sound smart.

20% of the time, it works every time.

Panther Knowledge

[86 IROC-Z]

Panther Knowledge

Exactly