[DR-JEKL]

Originally Posted by tawfeeqh

I found on schmiedmann for $1144 USD, however they are currently out of stock. I think the delivery was $150 USD. However not sure how realiable the re-stocking turnaround time is.

http://www.schmiedmann.com/3_series/...24.htm#1934775

No wonder they're out of stock at that price!!!

[Coupes33]

Originally Posted by bmwheath

Nice runs Coupes! Your close to my times (but im still stock turbos, not RB's).
What gear where you launching from?
Any what boost you running through your Rb's?

But Heath you have an LSD and running E50. To run E50, a Stage 2 LPFP is all that is required? Does the HPFP handle E50 ok? I was launching in low gear because of the larger diameter of the ET Street radials and the less torque down low with the RB turbo's. I need more stall in the torque convertor and the LSD to get my 60' times down to yours. I actually data logged the 11.79s run from the burn out to the end of the run. The highest the boost got was 19psi. I have attached the file for the data log.

[bmwheath]

An LSD will not make a car faster at the track, unless you are wheel spinning off the line!
At the track i run an E45 mix, anymore than that and my HPFP numbers get a bit low in 4th gear. On the street i can run a little more E85 as im not doing 200km/h. Seat of the pants i can't feel any difference from E45 to E60 (with the map im currently on). I have 0 timing corrections around that mix so im happy with that!
Everyone's HPFP seems to handle different amounts of E85, i put in a brand new pump thinking i could run like E70, but even the new pump doesn't like anymore than E50 really.
I was launching 1st gear as well, i would suggest that as 2nd gear launch will probably slip your gearbox with the RB's!
Do an E50 map and give it a log and see how your HPFP numbers look. Try log through 3rd and to at least 5000-5500pm in 4th, that's where ive found it to put the most strain on the pump

[bmwheath]

Nice run by the way Coupes. I just checked your log. You stalled her up to about 2200rpm which is about the sweet spot, nice shifting, and also crossing the line in the top of 4th gear.
Have you tried shifting a bit earlier, 6000rpm?? I found good results at that rpm in certain gears
You are using Cobb yeah? Can you turn on hpfp to display in your logs?

[Coupes33]

Originally Posted by bmwheath

Nice run by the way Coupes. I just checked your log. You stalled her up to about 2200rpm which is about the sweet spot, nice shifting, and also crossing the line in the top of 4th gear.
Have you tried shifting a bit earlier, 6000rpm?? I found good results at that rpm in certain gears
You are using Cobb yeah? Can you turn on hpfp to display in your logs?

There was a thread on one of the forums that I read which explained how to calculate what revs to go to in each gear based on the torque curve for each gear. I will have to try and find it again. But in summary, it had first and second gears going to the limit and the following gears dropping back 500rpms so that the changes were in the best part of the torque curve. I could cut back some revs in the higher gears which I will try next time. Yes I am using Cobb and yes, I can and have logged the HPFP and LPFP previously but not since installing the Stage 2 LPFP and using E30. I will need to do that.

[bmwheath]

Yes ive seen that thread somewhere as well. As for how much E85 your hpfp can handle, just log it and as long as your numbers stay above about 10 then you should be good, anything less than that and you get close to the hpfp crashing out which has happens to me a few times, usually happens around 6-7 on the log

[DR-JEKL]

Originally Posted by bmwheath

Yes ive seen that thread somewhere as well. As for how much E85 your hpfp can handle, just log it and as long as your numbers stay above about 10 then you should be good, anything less than that and you get close to the hpfp crashing out which has happens to me a few times, usually happens around 6-7 on the log

since he has a cobb, he will get actual psi values for the HPFP (the HPFP data is displayed different to the JB4)

By memory you want to keep above 1800-2000psi when WOT for the HPFP.

[bmwheath]

Originally Posted by DR-JEKL

since he has a cobb, he will get actual psi values for the HPFP (the HPFP data is displayed different to the JB4)

By memory you want to keep above 1800-2000psi when WOT for the HPFP.

Yes true! Values of (10) on the JB4 is 1500psi. usually the hpfp will crash out around 900-1000psi.