copied from my post on my350z


this was all done at 48% on the profec B, this equates to 13.4 psi and hit a high boost of 13.5


ok here is the quick story, i knew traction would be an issue. i figured i would take first and second gear in low boost then hit high boost for the rest.... WRONG, didnt really work that way cause the boost controller did some weird switchover thing when i tried that. first run spinning like crazy, let off in 3rd gear about 2 times, let off in 4th, i was like WTF, maybe i didnt do a good enough burnout, 2.2 60' and ran 13.0 @115 taking it easy.

second run i noticed a lot of lag between gears, i figured i would speed shift. took off and pulled a 2.0 and ran 12.4 @ 118. well the clutch didnt like the speed shifting and bogged every shift, slipped the clutch and then it finally would go...

third run was spinning really really bad and i let off, didnt even try, still trapped 118 though just floorin it in 4th and 5th.

4th run i ran 12.4 again @ 118.5 , i think this is very weak. it is much faster, i dont care about the time, just the trap.

i know the problem, i just have only had the car running right for a week. i still have on the single tanabe... haha, i just havent sat down and figured out what exhaust i want to get. i didnt think there was a lot of lag until i ran through all the gears at once.


car sits there for over a sec then runs like CRAZY, then i shift and it sits there, then hauls ***, then shift, lag lag lag then hauls ***.

i spent more time in turbo lag then i did running.

i need to ditch the RPS clutch, get 3 " true duals and i will be set. this was all on the soon to do list and will be here soon....

plus i need to bring my slicks damnit

EDIT, i havent even played with the profec b, i just put it in there and set the main boost gain, maybe it is a problem with that, i might have the gain for the lag turned up too much, i will figure that out tomorrow!!

 

ok so looking at the profec b, i have my boost setting where i like it, thats the peak boost, then i have the gain at 25% and the start boost at 70. i will play with these numbers tomorrow but if anyone can explain how the start boost works and controls what, well that would be a great help...

 

it is so frustrating having to pedal a car down the track.

my blown 96 cobra was that way. On street tires, I couldn't go full throttle until 4th gear, and I'd always run 12.2-12.4 @ 120-128mph. This was a 535rwhp car......9 years ago.

I am surprised to hear you say that the RPS clutch wasn't holding up. Did the previous owner break-in the clutch? if not, that might be alot of the problem.

 

Quick vid of the 2nd run.
http://videos.streetfire.net/video/25b850f1-eb7a-4a63-a9d4-839d1f41b454.htm

 

where am I at.... no vids of me hitting the wall.

 

hey ryan, that was my first run, i was taking it really easy feeling it out there. did you have the second run by any chance??


thanks man

also would you please take that one down off street fire.
it would be cool to leave it if that one was my real second run.

thanks again


jeremy

 

yeah where you at.

 

Sorry dude. I don't have my speakers hooked up right now, so I couldn't hear anything. I guess I was wrong. I deleted it from streetfire and I'll put your better run up sometime tonight.

 

thanks man, i appreciate it, yeah at the end of the run it said what i ran, without speakers you wouldnt have known...

thanks for coming out, i have pretty much narrowed down the turbo lag to my exhaust and possible boost controller gains. will have it figured out soon...

 

FIXED. This is the real 12.4 run.

http://videos.streetfire.net/video/cdd6fbcc-e6d2-4bc4-a1cb-6a47ed95f705.htm

 

thanks man, i wish i had a better showing last night but i still have a lot of work to do. it pulls sooooo hard in gear at full boost. its just getting it there, plus traction!!

 

Get a set of dump tubes. those along with a 3" exhaust and test pipes will get you full boost as early as 3200 rpms IIRC.

 

yeah man, i am still tuning, i have dump tubes on it, they open when the WG are open of course, its before they open that its lagging. i am going to richen it up A LOT down low and take some timing out to try to get rid of some of the lag. i love tuning my own stuff and will figure it all out.