Turbos: RS6 vs GT25R vs GT28R vs K04?
02-18-2008, 10:41 AM
#22
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oofda. I recall DAP pulled a 2.5x with race gas in his setup, but at these power levels
and especially with elevated rev limits, I'm of the opinion that FATS means absolutely d!ck.
02-18-2008, 10:44 AM
#23
I think DAP saw a 10-15 whp difference with the hybrid RS6's
vs. the regular RS6's. I believe that was with the same tune too... but I'm not 100% sure on that. However, you have to remember he's running a miltek 3" catback and he's on stock heads (just upgraded valve springs and retainers) and cams. So he might be running into a flow restriction somewhere along the lines as well. So who knows at this point. It's a single data point that we are basing assumptions off of. Personally, I think the hybrid RS6's will prove to be better than straight RS6's with the right supporting mods.
Oh and the hybrid RS6's from blouch don't use the 997 compressor wheels. They are different extended tip compressor wheel that flow 42 lbs/min IIRC.
Oh and the hybrid RS6's from blouch don't use the 997 compressor wheels. They are different extended tip compressor wheel that flow 42 lbs/min IIRC.
02-18-2008, 10:47 AM
#24
I believe the ASP GT25 car did 490 whp on pump
When I saw it dyno at EPL it was putting down 470-480 whp on pump. So I guess it should be right around the same power as DAP's... both on pump gas.
02-18-2008, 10:48 AM
#25
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VAST GT car is not fully spooled by start of FATS pull, whereas EPL RS6 car is AFAIK...
Ask Jason and Jason how they liked the ride when they visited. They were literally laughing out loud as Mike was flooring it. 
I believe EPL RS6 car runs more boost, not 100% sure though. Regardless, hard to take anything away from either of them...both are obviously very powerful/quick setups.
I believe EPL RS6 car runs more boost, not 100% sure though. Regardless, hard to take anything away from either of them...both are obviously very powerful/quick setups.
02-18-2008, 10:55 AM
#26
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yup, agree on all that
I seem to recall DAP thinking the heads were actually his limiting factor in flow now, but I am not %100 on that. Plus he is still running stock S4 cams unless something changed in the last month.
The single data point factor is HUGE, we just don't have enough info yet. I know there are a good amount of RS6's getting on the road shortly, so hopefully we will have more data in the next few months.
The single data point factor is HUGE, we just don't have enough info yet. I know there are a good amount of RS6's getting on the road shortly, so hopefully we will have more data in the next few months.
02-18-2008, 10:57 AM
#27
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Links to his last two posts on the car with any numbers....
<a href="https://forums.audiworld.com/s4/msgs/2739909.phtml">Drag Strip Runs</a>
<a href="https://forums.audiworld.com/s4/msgs/2738426.phtml">FATS run</a>
AFAIK, he has the GT car torn apart right now for upgrades. Doing a 3.0 block and some other goodies. It's going to be even more of a monster.
<a href="https://forums.audiworld.com/s4/msgs/2738426.phtml">FATS run</a>
AFAIK, he has the GT car torn apart right now for upgrades. Doing a 3.0 block and some other goodies. It's going to be even more of a monster.
