longtube headers,forced induction and vvel

Nissan370

if your supercharged and add longtube headers will that cause you to lose power because of vvel
i ask because vvel may let more boost pass the valves on a free flowing exhaust longtube vs shorties

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370z vsr motorsports single turbo/built motor 9.1cr 525rwhp/450rwtq @ 10.5psi (stock maf maxed out)

DIGItonium

Search for valve overlap.

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show2nite

Headers are not Beneficial with a SC that setup is Best for Turbo.

Chuck33079

How does one go about running long tube headers and a turbo?

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Sh0velMan

By running a mid or rear turbo setup.

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leighspped

there is much debate if you get a solid answer post it up!


im just worried it will be shot down

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theDreamer

GTM Supercharger Stage 1 w/ F.I. LTH

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show2nite

Call SAM from GTM and ask.

theDreamer

What are you talking about? I have ran this setup and it works 100% and a LTH setup with a SC is the ideal exhaust setup.

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Sh0velMan

I have also heard from Stillen that they 100% do not recommend any headers with their S/C setup. Stock manifolds only.

For the same reason, too much valve overlap @ high RPM causing charge to exit cylinder before combustion.

I don't think it's that huge a deal at normal boost levels, but that's what they say.

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theDreamer

It all has to do with the SC unit and if it was built properly with expansion in place.
Stillen and GTM really built their systems to function with stock exhaust setups because of CARB requirements, which limits the expansion for headers & exhaust. But honestly, I have ran this setup (GTM Stage 1 SC) and it works great and I highly recommend it.

-Better heat management
-Stock cats will blow and if you are driving while this happens you could possibly suck part of it into the engine bay
-Better flowing exhaust

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SS_Firehawk

I'm getting twin SC's with my LTH's. With VVEL tuning coming around (not sure if GTM will be doing it with mine), there will be a good deal of info coming down the pipeline.

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Z eliminator

What stage SC are you running on the car with headers. if its a stage 2 i would like to know how you installed the air cleaner.

thanks

Z

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Nissan370

Hmmm longtube heads work great on my mustang with the vortech kit. Maybe I will do the convert to long tubes anyways since vvel is being worked on
Thinking of doing the headers since i need to do the clutch/flywheel in march

Anyway I think having more control over vvel will pull more power out of all the blown cars
Like adding a cam

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370z vsr motorsports single turbo/built motor 9.1cr 525rwhp/450rwtq @ 10.5psi (stock maf maxed out)

theDreamer

I only have the stage 1 kit, the other stages I cannot comment on with LTH fitment.

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