s475 choking out?

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Mar 2, 2012 | 02:53 PM

#21

Sarg

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From: Atlanta, GA

And rear mount as well. Pretty decent numbers from a rear mount.

Mar 2, 2012 | 02:59 PM

#22

mike13

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From: Lake Tapps, WA

Quote:

Originally Posted by Sarg

And rear mount as well. Pretty decent numbers from a rear mount.

not to bad for a rear mount, it pulls pretty hard at 14lb's. I'm in the process of going with a 390 from AES and front mount.

Mar 2, 2012 | 03:08 PM

#23

hellbents10

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From: Spring Lake, MI

Yeah Jose sold us on a couple 80s with the 92mm turbine, and I am looking forward to the results on a 438 shooting for 2400.

Mar 2, 2012 | 03:43 PM

#24

mike13

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From: Lake Tapps, WA

Jose said my 83/92 should be good for a honest 900rwhp,

Mar 3, 2012 | 03:40 AM

#25

ZTwentyAteU

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From: Nashville, TN

so what I was expecting, we are just running into backpressure issue sounds like. I'm pretty happy with the result still, I think he is too.

Boost is 15lb until about 5500, then drops to 13. The dynojet just cant keep it loaded the whole pull

Mar 3, 2012 | 03:56 AM

#26

buick_lsx

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im almost happy...we didnt get to throw the 110 in the tank and max the turbo out lol

Mar 3, 2012 | 11:08 AM

#27

mike13

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From: Lake Tapps, WA

Quote:

Originally Posted by buick_lsx

im almost happy...we didnt get to throw the 110 in the tank and max the turbo out lol

It's encouraging the car has shown it has potential to make more power, the numbers are good with just a turbo upgrade you'll be there. One thing I would like to remind you of is that if you install a larger turbo with less backpressure the tune will change, you will likely pick up more power requiring more fuel and more likely to have knock, so keep a eye on the afr's and knock. High back pressure affects more than just the peak numbers.

If I still had my S380 80mm/w race cover & 87mm turbine wheel I'd let you try it but I sold it to a friend who is starting his build this month.

Mar 3, 2012 | 02:02 PM

#28

Nitroused383

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Try keeping the wastegate closed and see what it makes. Install a back pressure gauge on the hot side and you will really know whats going on. Just install something in place of one of the o2 sensors if you have them on your hot side.

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Mar 3, 2012 | 06:58 PM

#29

buick_lsx

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Fried the Trans today, and RIGHT NOW i am pulled over with two blown out tires...what a great day lol

We were gonna try a pressure gauge in the down pipe o2 sensor when it gets back up and running

Mar 3, 2012 | 08:37 PM

#30

ZTwentyAteU

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From: Nashville, TN

This car will make all the boost we want, it only drops boost on the dyno. it holds 15.5-16 on the street all day.

when the trans is fixed its def getting the gauge stuck in the wideband hole

Mar 3, 2012 | 08:38 PM

#31

Nitroused383

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From: Washington

You measure back pressure pre turbo not post. If there is pressure in the down pipe all that tells you is the down pipe is either too small or your muffler is too restrictive.

Mar 4, 2012 | 08:49 AM

#32

buick_lsx

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thats the only o2 sensor bung we have on the car...not gonna drill another one just for that so i figured better than nothing

but like he said, boost does not fall off on the street with load of the car so that issue is gone, difference between an inertia dyno and loaded dyno....

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