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gtx2860r 1/4 vs tuned 2015 wrx and charger v6?

pwnall1337

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#1
Horrible 60 ft's at 2.7s, lots of wheel spin and turbo lag. In the wrx video you can hear the boost cut out shifting to 2nd at 0:41 and hear the boost hit at 0:43. On the race against the charger, that would have been my best race, but I accidentally braked too soon.

Fiesta is 305 whp for only a second or two due to stock fuel system and 4,500 rpm spool times.

Trap speed is 103 mph, times were between 14.4 and 14.8

[video=youtube;f2j9jjJO0_0]https://www.youtube.com/watch?v=f2j9jjJO0_0[/video]

[video=youtube;Kf_uVkRimw0]https://www.youtube.com/watch?v=Kf_uVkRimw0[/video]
 


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pwnall1337

pwnall1337

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Thread Starter #3
Who tuned this car? Shouldnt this car be running high 12's with that turbo?
The car was max effort on the stock fuel system. The turbo didn't spool till 4,500 rpm with the catted cobb down pipe and the fuel pressure was dropping anything past 280 whp. We are commanding a 11.8 AFR to keep the pistons happen in texas 100 degree heat and this is the best we could do on 93. Even then past 7k rpm the afr would get into the mid 12's due to fuel pressure dropping. With a catless DP and some slicks 12's would be possible if I was ok with running a mid 12 afr through my entire power band. The dyno of 305 whp was not my street tune and I only used it once for a glory dyno pull but it was not considered safe.
 


Hijinx

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#5
Thank you for the response... Is a 4500 rom typical for that size turbo?
Not exactly. There different pieces to the puzzle here; manifold, downpipe, back pressure, cooling and tuning all play a role. Pwn was a relatively early adopter of the big turbo kits that utilized the stock manifold and he was on a catted downpipe (can be argued) which don't promote faster spooling.

However, on an externally ported tubular manifold setup, a 2867r will be full spool around 3800.
 


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