Twin scroll vs twin turbo

SS_Firehawk

So I read the article, I understand how the twin scroll works and it's benefits. I guess I'm trying to see where TT's would be more advantageous than the twin scroll. You mentioned that TT's with equal length headers would be the best combo, but all I see are short manifolds coming with the kits. Is it a packaging issue? If it were the case, why not install the turbo's farther down or create an equal length header package that fits? Is it because we can just kick up the boost to make up for the inefficiencies?

I'm definitely more of a function over form kind of guy. I prefer, and would pay the extra coin to run at a higher efficiency than take the easy road. Turbo guys always say just turn up the boost to make lost power, and I think to myself, that methodology only goes so far. It's the same methodology of the 60's, stuff a bigger motor in it to improve performance. If we stayed that route, we'd all have big blocks and getting 5mpg. Don't get me wrong though, there is a reason why those cars are still coveted. When we have companies like Mazda pushing 14.0:1 compression on a 2 liter motor and can run 87 octane, what are they doing they everyone isn't?

Sorry, went off on a tangent and got lost in my thoughts. Am I making sense here?

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Boosted Performance

It is a price and fitment issue. To do a proper manifold idealy you want short equal lenght runners. This is not possible with the VQ because of the engine layout. The next best thing is mounting the turbo at the end of a properly designed equal length header, like the picture I posted above. Power per PSI with that setup will be higher than with the log style manifolds every time, mainly due to the scavenging effect.


If you want the best twin turbo kit, go and buy a good set of equal length headers. Have a good fabricator cut the three bolt flange off, and have him extend the collector, so that you can fit a twin turbo kit like the one I posted above. With a proper engine build, and turbos, you can get in to the tripple digits.

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G37sHKS

Well speech!

I wonder if Tony@Fastintention will take this advice and make equal length headers for his TT kit??

Damn, I thought GTM did their homework and deliver the best kits for the community!! Me want equal length headers right now!!

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Nixlimited

Speaking of which, what ever happened to the FI TT kit?

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DIGItonium

Give it a few more weeks...

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roplusbee

It is actually in the works, as in, being contructed. Not sure how far he has gotten with testing though. I didn't want to pry.........especially since I just got my tune fixed @ UPREV.

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