Ready for the results from what we talked about you guys are doing tomorrow Geoff. Let me know bro

Justin

 

yeah mike reichen's evo is no joke - 237mph in the mile on an off-the-shelf BorgWarner turbo is straight impressive, way to set the bar high mike!!

the 67mm S400SX is a monster and considerably larger than the 66mm S300SX 91-79. The S400SX it is designed to be a 1000whp capable 67mm - its simply not possible it will spool early. 1.10 a/r is recommended, 1.28 a/r is optional (same as all the S400SX). Both of these turbos are only available in T4 twinscroll... its not possible a T3 twinscroll footprint could support this power level - IMHO it absolutely positively must be T4 twinscroll when moving this much exhaust gas!


^^correct

T4 twinscroll, thats the one

^^^thank you for posting up accurate information

 

Don't think the 400sx 67mm will be for me. The power capability is killer and I'll have the set-up to rev it out far enough to make use of it but I really would like something to spool a little sooner so I don't have to rev too high. Guess its the 91-79 for now.

Thanks for the insight Geoff

 

the 91-79 is a great unit, i am even more biased towards the 88-75, but thats just my preference

 

Anything on that car tonight Geoff?

 

the car exploded the 4th gear of the straight cut dog gear liberty, in their billet case. hopefully will have a new 4th gear by friday and dyno friday night/sat.. at least we know the car is making power

 

lol did the 71 blow it??

 

the car went 9.1-9.3 about 14 passes in a row, then put it on the dyno for the testing and immediately 4th gear let go. the shrapnel damaged the input shaft too. time to try the albins gearset or else pony up for a ppg

 

What could be the difference in spool and power beteween the 67 and the 71 mm s400sx on a 2.4 stroker evo engine, just for having a vague idea, and last thing, as regards spool characteristics, are they comparable to the 4294r from a post of yours of about 1 year ago?
Thanks....

 

very few of our evo builds use the S400 size turbochargers, only the drag cars we build uses these (mostly drag hondas). All our evo testing has been on the S300SX because our evo customers tend to be more focused on a broad powerband and faster spoolup. the GT4294R will not make as much power as the S400SX, this has been pretty well proven at this point

here are some pics of the evo we built with this turbo, unfortunately the owner had some financial hardship and had to sell the car, it went on ebay for a steal (last i heard its in connecticut?) too bad we never got to do any of the planned testing.

 

Thank you very much, looking at your thread regarding the GT4294 stroker evo you built (https://www.evolutionm.net/forums/ev...p-700lbft.html) in my opinion spool and powerband are great, if compared to other builds with similar numbers, so if you can confirm me that s400sx have similar spool i would be really interested in trying one of these, which one would you suggest, the 67 ot the 71 mm? Looking at the graph you posted ih this thread regarding a Honda engine i don't see particular gains ragarding early spool in favor of the smaller 67, so i would be tempted to try the 71 mm, it would be an upgrade from a previous Garrett GT4094R i just have on a twin scroll system of yours, if retard would be in the range of 500/600 rpm from this for me it would be great....

 

yes, the s400sx will have comparable spool to the GT4294R - in fact the S400SX will typically spool faster due to the improved blade aero.

the real advantage of the 67mm S400SX is that it allows you to make ~1000hp in the drag racing classes that are limited to this size turbo. We are doing testing on it this weekend (the trans parts just came back) and will post up early next week the results. I believe we could have used the 1.10 a/r on the 67mm S400SX and produced a better powerband. The 1.25a/r is only applicable for the 71mm and 74mm turbines. Check out mike reichen's video of his 74mm S400SX equipped evo - 237mph in the mile

 

here is some video of my BW equipped R14 on the final lap of the modified tuner shootout time attack (fast lap) and the cooldown lap: Full-Race R14 Catches Fire at 2010 Tuner Shootout (Video) <--- CLICK HERE



You can hear the aluminum exhaust break around 1min 25secs, and thats when things start to get scary. fortunately the driver is fine and almost no damage to the car. great video tho!

 

Thank you very much for the explaination.....
So, in last analisys, which one you would choose without class limitations, looking at a right balance between pure power, powerband and spool, between the 67, the 71 or even the 74 mm S400SX, for use on a 2.4 litre race engine on e100 fuel?
Pls, could you also pm a me a price for these units?
Thank you very much in advance.

 

i really dont know the answer yet giangi, but it would be the 67mm S400SX 1.10 or the 71mm s400sx 1.25... the best thing about these turbos is that they are VERY affordable compared to the other alternatives, you could try one, and if its not what you want sell it and try the next. shoot me an email at geoff@full-race.com and ill send over the pricing

we went to test this weekend and did not realize the axle was damaged inside the cv when 4th gear broke (now the cv is way out of round) so we are waiting on a new axle from DSS now... argh