I would suggest keeping it single turbo because if you twin turbo a 1.5l 4 cyl. neither turbo will flow anywhere near their efficiency, not to mention the power impulses will be horrible and will cause extreme lag...
JDM D15b project proposal...
Need your advice guys!
Can a JDM D15b be twin turboed? Bcoz i have 2 turbos from Toyota starlet GT Turbo 1.3 lying around and i was wondering if a could use it.
I was also wondering if replacing my stock injectors into injectors from a D16 would make any difference? or h22 injectors would be better?
also, can a 2inch exhaust be enough for a boost of around 8-10 psi only?
any help would be appreciated guys! thanks!
Can a JDM D15b be twin turboed? Bcoz i have 2 turbos from Toyota starlet GT Turbo 1.3 lying around and i was wondering if a could use it.
I was also wondering if replacing my stock injectors into injectors from a D16 would make any difference? or h22 injectors would be better?
also, can a 2inch exhaust be enough for a boost of around 8-10 psi only?
any help would be appreciated guys! thanks!
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Starlet GT Turbos and Starlet Glanza V's (which share the same engine:4EFTE) normally use CT9 toyota turbos. Apparently there are two versions of CT9 though, which differ in turbine impeller shape and size. And I came across a couple of JDM 4EFTE's which had a CT12 in what looked like a factory stock installation. Rule is the CT9. Some late model 4EFTE's had the Aisin micro-turbo, which basically is considered to be an unmarked CT9.
Toyota MR2's used the ceramic, divided housing, more efficient version of the CT26. I am on a project to install a CT26 from a Supra (the less desirable CT26) on my Vtec-E. For a low boost, no-expectations project, I think it's a good turbo.
Toyota turbo's are cheap and reliable big time! Unless of course you boost them up!
exactly like the definition if each word
parallell, 2 turbos the same size where the exhaust mani splits and enters each one equally. compressor outlets merge together into one charge pipe.
sequential, 2 turbos of different size, smaller one helps spool the larger one. exhaust enters the smaller turbo, the DP then enters the bigger turbo's turbine inlet, then exits into the exhaust. compressor outlet of smaller turbo feeds into the compressor inlet of larger turbo, then the larger compressor outlet goes to the charge piping.
small pic, but decent example
could also be referred to as "Compound Turbocharging", but ive always known it as sequential
http://en.wikipedia.org/wiki/Twin-turbo
exactly like the definition if each word
parallell, 2 turbos the same size where the exhaust mani splits and enters each one equally. compressor outlets merge together into one charge pipe.
sequential, 2 turbos of different size, smaller one helps spool the larger one. exhaust enters the smaller turbo, the DP then enters the bigger turbo's turbine inlet, then exits into the exhaust. compressor outlet of smaller turbo feeds into the compressor inlet of larger turbo, then the larger compressor outlet goes to the charge piping.
small pic, but decent example
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could also be referred to as "Compound Turbocharging", but ive always known it as sequential
http://en.wikipedia.org/wiki/Twin-turbo
We are on the same wavelength.
We agree on the definition of parallel but not on sequential. But we're almost there.
Parallel is as you said. 2 turbos same size both spool together, cylinders are shared, 1 exhasut mani/turbo, boost charge carriers normally joined before IC via a Y-pipe. Biggest fuck up with this set-up on in-line engines is boost pulsing.
What you referred to as sequential and wiki calls it compound, we call it in-series over here. 2 turbos different in size, 1 exhaust manifold, exhaust enters manifold > turbine smaller turbo > turbine larger turbo > OUT. Boost built by smaller turbo enters bigger turbo compressor than is recompressed into the engine.
Sequential is 2 turbos same size, common manifold, they spool at different engine speeds as in the RX7.
this is a nice photo of a compound set-up, I found it in a gallery posted on this board.
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