rolling road Dccd position for V4 sti type r

rolling road Dccd position for V4 sti type r

Author
Discussion

cleverdick

Original Poster:

127 posts

204 months

Monday 8th January 2018
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As above for some first time power runs for the car.Do about a dozen trackdays a year,would like to know where dccd gearbox position should be put for best results,but safe.It is a 4wd RR.After 4 read outs.1-Exhaust Bung in,2-Exhaust Bung out,3-2nd map(twin map) and antilag on,4-75 shot of noz..Cheers

MDMA .

8,849 posts

100 months

Monday 8th January 2018
quotequote all
You need to leave it in the auto position ( for a RR ) which is default when you first turn it on.

cleverdick

Original Poster:

127 posts

204 months

Monday 8th January 2018
quotequote all
Will do,cheers

FBP1

499 posts

148 months

Thursday 11th January 2018
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A V4 sti Type R ( circa 1998) doesn't have an auto setting unless the much later models Sti transmission and electronics have been retrofitted. It's just a manually variable lock up diff from 67R: 33F in the open (green lights ) position.
I run my similar model with the diff locked, i.e. with the diff lights in the red, on the rolling road, but your dyno operator should be able to confirm that for you.

cleverdick

Original Poster:

127 posts

204 months

Thursday 11th January 2018
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Thanks for your reply,but finished on RR a couple of hours ago,left it on basic setting(green).Car went well.

bonesX

902 posts

179 months

Thursday 11th January 2018
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How much did she make?

anonymous-user

53 months

Thursday 11th January 2018
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You should put it in full lock, for future reference.

cleverdick

Original Poster:

127 posts

204 months

Sunday 14th January 2018
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Evening,The result are in.The point for the stats are,its not been on one(I bought it in 10,7,13),have done 15 to 20 trackdays with it,interested as thinking of selling and how restrictive/beneficial mods are.

engine power wheel power torque

As standed/bung in 255bhp 188bhp 200lbf.ft

As standed/bung out 284bhp 214bhp 207lbf.ft

Switched to 2nd map/anti-lag/bung out 287bhp 221bhp 225lbf.ft

2nd map/antilag/75 shot of NOZbung out 282bhp 217bhp 222lbf.ft

Conclusions for me

Bung needs to removed permanently on trackdays,so will be purchasing some s/steel exhaust silencers.(have 3" straight through de-cat.
2nd map works,not much bhp,but bumps up the torque.
Nitros doesn't look like its working properly,it boosts between 3500rpm/5000rpm,but I think maybe there was a loss of rear tyre grip.

Going to Cadwell on 27th and then Blyton on 28th Jan,so will be addressing these issues before I go.Maybe as pointed out I should have put it in full
lock.Thanks for all interest/advice

Andy_C77

247 posts

73 months

Friday 9th February 2018
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Sorry for the newbie question but what is the bung and what is it for?

cleverdick

Original Poster:

127 posts

204 months

Friday 9th February 2018
quotequote all
Evening,a bung either fits inside or over the tailpipe,held by a couple of nuts and bolts,to cancel some of the noise the car will make,if it is likely to break a race track/ airfields maximum noise(decibel/do)reading for trackdays.Someone may correct me,but that's the best I can do.