Single vs. Twin Turbo

[deemo99]

Originally Posted by 3kvr4

for threads by ray pampena

I read all 8 pages and my conclusion is personal preference for most people here. Ray mentioned some real racers who have gone back to twin with the why and the results (times), but there were few real world results related to 3S's it seemed.

What I would like to know is how does the spool up on a 4088R or 4094R compare to say DR's (900's or 1000's whichever is equivalent flow to.....), E16G's, 2871Rs, or any other known available kits by the top vendors here.

Does anyone have a dyno sheet for a GT40 3S we can compare with the available dyno sheets for the more popular/standard twin upgrades? To me, the 42 is just too big for the street on a 3.0 block. Yes it will crush most on full boost, but it is not always ready to go like some of the twin setups (TD04's are not included since they spool fast but will not support the kind of power we seem to be focused on here).

I think that DR-900's and a 4094R should have similar power potential. It would also seem that a 4088R, DR-800, and E16G car should all have similar end power potential. For me the debate and interest would be in which spools faster. Most of us don't cruise at 4500 so we can break our necks under acceleration like 42 or bigger would like to create quick boost--as I understand it; and lag matters less at the strip generally than it does on a roadcourse or the street. I am under the impression that twins will spool quicker from say around 3000rpmish and reach 8000rpm quicker than the equivalent single (PR and CFM).

I would like some help or info from more knowledgables however. I am interested in some info, not trying to start something heated here.

$.02

[Kibwe Walker]

Its about total area under the functional power curve more so than peak numbers that generate the fastest times. This will determine how fast your car is more so than peak numbers. For our cars most of our speed and track times is determine by how much power you are making from 5k-7k rpms (stock redline). Our driveability comes from idle to 3k rpms though.

With a turbocharged car in a drag strip setting it doesn't really matter because as they say, lag only occurs in first gear. Thats saying is true and for the 3s specific world all our records are held by TT cars.

TT works better on a V design engine while a single setup would suit a flat or inline setup with the way those exhaust are usually setup. For the everyday person you can't gather lag or the perception of it on a dyno or even from track numbers unless there is a issue with respool between shifts (BIG ASS TURBO).

Lag is not only how early or late the bulk of your power comes in but to me its mainly the amount of time it takes for you to give it throttle and there is a appropriate response.

All you need to decide is what do you want out of this car power wise (goal either AWHP, ET, or traps).

After that look up people who have already accmplished your goal http://www.3squicklist.com/

Hit them with a PM or get a number to actually talk to them and go from there. Ask the what to do and what not to do, the regrets, and or problems they have run into with there choices. Compare that to the $$$$$$ you are willing to spend and it all becomes clear.

You have options all the way from a nitrous power 9b car all the way to custom 6g74 with 4088's to choose from as far as how elaborate a setup you want to go with. Time and $$$$$$ makes the rest of the decisions.

Oh the larger setups (3037's, gt42, dr1200's, twin gt35 setups, twin 4088 OMG) don't hit there boost until 5500-6k rpms on our 3.0 litre 6g72, go to a stroker or 6g74 and of course that number will lower. Evo 3's are not really that large by comparison and they will get you 15 psi around 4k-4500 but usually 100-200 more AWHP than a tdo4 counterpart.

You got options though which is good.