Full-race's new toys
Aug 2, 2007, 12:03 PM
#257
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How much later do you think the GT4094R would spool than the GT4088R, because it says its for drag use and the GT4088R is for High Power Street/ Strip/ Highway. Would the GT4094R be to laggy for the streets? The questions i asked would be for a built 2.4 on 93 and meth daily.
Aug 3, 2007, 12:54 AM
#259
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Full-Race Geoff, Do you have and of the twinscroll kits in stock right now or do we have to wait for you guys to build it? If you have to build it how long do we have to wait?
Aug 3, 2007, 03:26 PM
#261
throttle response benefits are huge, this is definately one of twinscroll's benefits
How much later do you think the GT4094R would spool than the GT4088R, because it says its for drag use and the GT4088R is for High Power Street/ Strip/ Highway. Would the GT4094R be to laggy for the streets? The questions i asked would be for a built 2.4 on 93 and meth daily.
thanks
Aug 4, 2007, 11:30 AM
#262
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Quote:
Originally Posted by ill-luzion
How much later do you think the GT4094R would spool than the GT4088R, because it says its for drag use and the GT4088R is for High Power Street/ Strip/ Highway. Would the GT4094R be to laggy for the streets? The questions i asked would be for a built 2.4 on 93 and meth daily.
the 4094 would spool about 400rpm later than the 4088 and will have slightly worse response becuase the turbine wheel has to work harder to power that big 94mm compressor. I think the 4088 is the way to go if the car sees street time, and the 4094 is the way to go if you dont have AC and really want to drag race
i wont be running a/c but the car will be mostly street driven.
Originally Posted by ill-luzion
How much later do you think the GT4094R would spool than the GT4088R, because it says its for drag use and the GT4088R is for High Power Street/ Strip/ Highway. Would the GT4094R be to laggy for the streets? The questions i asked would be for a built 2.4 on 93 and meth daily.
the 4094 would spool about 400rpm later than the 4088 and will have slightly worse response becuase the turbine wheel has to work harder to power that big 94mm compressor. I think the 4088 is the way to go if the car sees street time, and the 4094 is the way to go if you dont have AC and really want to drag race
i wont be running a/c but the car will be mostly street driven.
Aug 5, 2007, 09:52 AM
#263
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l8r)
Aug 5, 2007, 11:35 PM
#264
Quote:
Originally Posted by ill-luzion
How much later do you think the GT4094R would spool than the GT4088R, because it says its for drag use and the GT4088R is for High Power Street/ Strip/ Highway. Would the GT4094R be to laggy for the streets? The questions i asked would be for a built 2.4 on 93 and meth daily. I wont be running a/c but the car will be mostly street driven.
Originally Posted by ill-luzion
How much later do you think the GT4094R would spool than the GT4088R, because it says its for drag use and the GT4088R is for High Power Street/ Strip/ Highway. Would the GT4094R be to laggy for the streets? The questions i asked would be for a built 2.4 on 93 and meth daily. I wont be running a/c but the car will be mostly street driven.
The ability of a twin scroll to utilize the pulsing, unsteady flow of the exhaust exiting the engine gives it a huge bump in "apparent" efficiency, and ultimately spools up the turbine that much sooner. Twinscrolls also isolate the cylinders' blowdown events much better than a non-divided housing, preventing the exhausting cylinder's very high PEAK exhaust manifold pressures from finding their way into the other cylinder on its overlap period. "
Aug 6, 2007, 04:50 AM
#265
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If you arent running A/C you can run our non-AC downpipe, that would definately improve performance. you can easily convert to a 4" downpipe and exhaust for improved performance. This setup would work well, but likely be more turbo than you really need for the street... it would be ridiculously fast.
in the other thread, drifto summed up the advantages perfectly:
to specifically answer your questions, the twinscroll aids top end power by preventing (negative) interactions between cyls on the blowdown event. Using a twinscroll geared toward top end has no downside. It is more responsive and has more low end. If you miss a shift, or if you have to get out of the throttle for any reason, when you get back in it, the twinscroll comes back on harder and faster.
in the other thread, drifto summed up the advantages perfectly:
to specifically answer your questions, the twinscroll aids top end power by preventing (negative) interactions between cyls on the blowdown event. Using a twinscroll geared toward top end has no downside. It is more responsive and has more low end. If you miss a shift, or if you have to get out of the throttle for any reason, when you get back in it, the twinscroll comes back on harder and faster.
Aug 6, 2007, 03:23 PM
#267
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Jeff or his shop will never beat the big dogs in the 4g63 world at their own game. The old school DSM'ers like Buschur and AMS just know way too much about the cars for full race to play catchup.
Aug 6, 2007, 05:16 PM
#270
I don't think he meant it to come off quite the way it sounded. I might point out however that 'Geoff and his shop' have demonstrated what I consider to be an unequivocal degree of development of turbo systems in this forum. The fact that they've chosen to focus their efforts on developing and testing turbo systems for various platforms and not drag racing one in particular is their perrogative.