good idea? cheaper than a jz swap, not all that complicated, and virtually no lag, right? not to mention it might be faster than the 1jz. I dunno, it was just an interesting occurance that came to me in a dream today in 5th period.
twin turbo 7M?
- Thread starter Mr.SelfDestruct
- Start date
OBX makes a replica or a Greddy manifold on ebay that you can cut the wierd 3-bolt turbo flanges off of, weld on some other flanges and run twin evo3 16g turbos.. i thought about it, but decided its really not worth the work involved.
why turbos from an evo? just a question. I was thinking of just putting some sort of adapter on the stock manifold. the advantages would mostly be in a race involving a lot of downshifting and turns so you dont fall into lag.
yeah. dsm guys use evo3 16g's as upgrades to stock 14b's and can make 300hp with it... so i think you'd do good with those...
if you were to use twin ct's you'd need sw20 ct26's
if you were to use twin ct's you'd need sw20 ct26's
i just meant why that specific car, and i wouldnt want too high boost, because i'd be putting these on a n/a :aigo:
Twin turbos do not spool faster, especially if you make an adaptor for the stock manifold, that would be awful, youde need a proper tt manifold, then you have the oil lines, and the piping is nuts. Twin turbos are nice, but too much work. just mount a big single it will be the same thing without the complication.
Ang
Ang
isnt a proper twin setup supposed to be with a small, quick-spooling turbo that gives low psi, and a bigger one that takes longer to spool, but ends up making more pressure? and the adapter was just a wild shot in the dark, so what if I did that, but w/ a tubular header?
There is less inertia in a smaller wheel to spool, but there is also less flow. That is why Toyota went two way on the 2JZ. First one, then both.
You can do sequential twins where all the gas goes first to one then the other comes on at a preset level of boost and it will offer good low down response without choking top end power.
Another way of doing twins is Compound Charging where you use different size turbos in series With the Larger 1st stage Compressing the air so it will fit into the 2nd stage where it's compressed again usually to insane pressures!
(80 psi+)
A third way is to use 2 equal sized smaller turbos each being half the capacity of a single you'd normally use, this is where PMoI comes into it's own
(Baachhy bought this up in my thread concerning fuel tank placement but it applies here)
PMoI is Polar Moment of Inertia, something that's smaller in diameter or closer to the axis of rotation will accelerate easier in this case the smaller wheels will spool up sooner so for the same power output you'll get lower spool!
In the Fuel tank discussion it applies in that the closer you get the tanks to the middle of the car the PMoI will change and the car will turn in quicker taken to extremes you can end up with a car that will turn in fast but be unstable as it will try to spin on it's axis! (HUGE oversimplification but this sort of covers it)
Twins are a LOT of work to do right (look at Randy's beautiful car for an example of how to do it right) and the expense V's benefits isn't there for me as the newer Turbo's like the GT series offer low spool without choking off top end.
Another way of doing twins is Compound Charging where you use different size turbos in series With the Larger 1st stage Compressing the air so it will fit into the 2nd stage where it's compressed again usually to insane pressures!
(80 psi+)
A third way is to use 2 equal sized smaller turbos each being half the capacity of a single you'd normally use, this is where PMoI comes into it's own
(Baachhy bought this up in my thread concerning fuel tank placement but it applies here)
PMoI is Polar Moment of Inertia, something that's smaller in diameter or closer to the axis of rotation will accelerate easier in this case the smaller wheels will spool up sooner so for the same power output you'll get lower spool!
In the Fuel tank discussion it applies in that the closer you get the tanks to the middle of the car the PMoI will change and the car will turn in quicker taken to extremes you can end up with a car that will turn in fast but be unstable as it will try to spin on it's axis! (HUGE oversimplification but this sort of covers it)
Twins are a LOT of work to do right (look at Randy's beautiful car for an example of how to do it right) and the expense V's benefits isn't there for me as the newer Turbo's like the GT series offer low spool without choking off top end.
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Well just found this hope its not a repost but a twin turbo 7m has been done B4
http://cgi.ebay.com/ebaymotors/JDM-...ewItemQQcategoryZ33731QQitemZ8001762984QQrdZ1
http://cgi.ebay.com/ebaymotors/JDM-...ewItemQQcategoryZ33731QQitemZ8001762984QQrdZ1
CTsupra
Supramania Contributor
yeah it's been done before, but for some reason you hear about it, then you never hear a peep from the people who did it ever again. no 1/4 mile times, dyno sheets, nothing.
i would love to see a twin non-upgraded ct-26 7m. easy 550+rwhp under 20psi.
i would love to see a twin non-upgraded ct-26 7m. easy 550+rwhp under 20psi.