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So just an update. Now the exhaust is quiet I can hear a small noise in third gear when on the overrun. So I will try rebuilding the s4 v8 gearbox I have that is noisy in almost all gears. I have a new input shaft and first gear for it and will change whatever bearings that are making the wine noise. I can then put that into my car and as it has a higher 6th gear than the rs2 box it will suit the stroker engine torque.
When the rs2 box is out I will strip it and find why 3rd gear is noisy and rebuild it.
Cheers des.
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Wow! That's some mightily impressive power output, I can't imagine getting 518ft/lb's of torque... must really punch you in the back!RS2 - Project Mental Wheels
RS2 - LHD on the road again
RS2 - reduced to component parts
RS2 Saloon replica
A4 1.8T
BMW 320d Touring M Sport Business Edition auto
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Congratulations, that sounds impressive :-) 700nm...be honest: Little bit afraid when starting it?
It´s just what I took for minimal goal, but wanting to exceed it. Good to have someone to compare
Could you post something about the spool and pressure behaviour at highest gear?
Something like what you told us earlier
Code:0.5 bar at 2k rpm, 1 bar at 2.5k rpm and over 2 bar by 2.8k rpm.
It´s still 2,5L tall block diesel with EFR6758, what CR do you have? Some headworks or porting? Very nice power curve :-) Is it the final mapping?Last edited by Quattronaut; 3 February 2015, 23:49.
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Originally posted by Quattronaut View PostCongratulations, that sounds impressive :-) 700nm...be honest: Little bit afraid when starting it?
It´s just what I took for minimal goal, but wanting to exceed it. Good to have someone to compare
Could you post something about the spool and pressure behaviour at highest gear?
Something like what you told us earlier
Code:0.5 bar at 2k rpm, 1 bar at 2.5k rpm and over 2 bar by 2.8k rpm.
It´s still 2,5L tall block diesel with EFR6758, what CR do you have? Some headworks or porting? Very nice power curve :-) Is it the final mapping?
Yes it's still tall block 2555 ish cc with 6758. I like the way it drives! Head is ported with new valve seats and supertec inlet and exhaust valves. I have played with the mapping since the power graph but just to change its driving style slightly as on the dyno it needed the boost played with a bit for peak power but on the road it would over boost.
The boost spool up points in 6th gear up a hill are as described. Typically full boot is normally at 3k rpm in lower gears and is 2 . 25 bar. Boost falls to 1.5 bar at 7k rpm. There is slight surge between 3 and 4 k rpm when over 1.8 bar boost but on the dyno increasing boost here to 2.25 bar didn't increase surge but brought up power and torque. The surge is only slight so not really a problem.
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Originally posted by macspring View PostYou're lucky, I not allowed use what a standard oem S car has when we're in the car together.
"Nulla tenaci invia est via"
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Originally posted by diesel des View PostHead is ported with new valve seats and supertec inlet and exhaust valves.
Originally posted by diesel des View PostThe boost spool up points in 6th gear up a hill are as described. Typically full boot is normally at 3k rpm in lower gears and is 2 . 25 bar. Boost falls to 1.5 bar at 7k rpm. There is slight surge between 3 and 4 k rpm when over 1.8 bar boost but on the dyno increasing boost here to 2.25 bar didn't increase surge but brought up power and torqu
My girlfriend likes the turbopunch :-) sometimes she´s looking a bit weird, when I´m braking little late behind other cars, but when I hit the floor on free road, she "Yiehaaaas"´s like a Kid running around a christmas treeLast edited by Quattronaut; 11 June 2015, 17:15.
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Your lucky to have a girlfriend like that!!
Valves are stock sizes but are cutback with 3 angle seats.
In 4th gear it is very useful as it pulls well from 40mph to over 100 easily. It's easy to get carried away with big turbos and high bhp numbers but I always feel that a wide power band at lower rpm is better. I think an efr 7163 would also be a great turbo on this engine with just slightly more lag and 525bhp. .. But that's chasing numbers again!
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Jap, this powerband is in 90% of the daily driving more usefull and faster than a high peak power setup with 600+hp.
7163 would also be a great deal. I think your turbo is running nearly at limit from 3500 to 7000, that´s a hard life. Maybe here the 7163 won´t only give more power, but maybe more reliability- or safety feeling :-) but I can´t estimate how much more lag it has, so before loosing that driveability, I think I also would keep it as it is.
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Des, You have Main radiator and AC condenser at the front, correct ?
http://www.s2forum.com/forum/showpos...6&postcount=51
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