s475 choking out?
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s475 choking out? Been messing with my buddies car, its a 70 buick with a 370 iron block and stock 317 heads, t6 s475(standard, no billet wheel or race cover) and a 236 boost cam. 4l80/s60 rear.
It still falls off power at around 6100 on the dyno. I'm not sure if this is norm, I thought she would huff to around 6500. it has a edelbrock truck style intake on it if that helps.
We made 710rwhp tonight on 13lbs, pump gas. It makes peak and don't "fall" off, but more along the lines of flattens out.
Just curious on others s475 experience on peak power. I know all combos are different, just lookin for opinions. It dont nessesarily need to be wound up any tighter, but you never know! I'm also curious on where we will run into running out of turbo if its turned up more
It still falls off power at around 6100 on the dyno. I'm not sure if this is norm, I thought she would huff to around 6500. it has a edelbrock truck style intake on it if that helps.
We made 710rwhp tonight on 13lbs, pump gas. It makes peak and don't "fall" off, but more along the lines of flattens out.
Just curious on others s475 experience on peak power. I know all combos are different, just lookin for opinions. It dont nessesarily need to be wound up any tighter, but you never know! I'm also curious on where we will run into running out of turbo if its turned up more
So it is a 83 more then likley. It will have BP close to 3:1 at 800+ hp. You need a bigger exhaust wheel. Also if it has a stock style intake it will not peak above 6100-6200 no matter what cam and tw.
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Verdad Gallardo Just not above 6100rpm, the runner length and size limit you there. A fast 102 will usually peak at about 6500 with the right cam. If you want more RPM you need shorter runners, via single plane or ramjet style holley or edelbrock.
So would the 96mm turbine perform better or is a bigger unit need ie S480 etc?
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might be interesting to know what it'd do with the filter off. also, i wonder if you are just pushing as much as that s475 can push, you a log of boost pressure across the range.
I was actually thinking of the 92mm. New wheel design from what they told me at FI and is a hot turbine (no pun intended). I am going with the 96mm in my personal application only because I might upgrade to the 82 billet or 88mm compressor wheel at a later date.
That's funny, I have the new 83mm billet comp with 92mm turbine wheel
I wish I could afford it, but on a budget and I am REALLY looking forward to seeing the 92 turbine paired with the 88 compressor wheel. Over at FI they said they were making one custom for a guy now, so I hope to see or hear about the results!
I made 583 @5200rpm, 10lb's unlocked 4L80, mustang dyno, It spun the tires on the dyno that's why the low rpm.
I'm at the 2:00 mark on the video
http://www.youtube.com/watch?v=iW6X9hDYHY4
I'm at the 2:00 mark on the video
http://www.youtube.com/watch?v=iW6X9hDYHY4