okay fellas, i just recently changed from crome to neptune rtp, and now my boost pressure is way more than it was before. when i was still running crome the boost cut was set at 21 psi, and it never ran pass 17 psi. nothing has been changed, only the engine management was changed. now the boost ramps way up to 20 plus psi rite around 6500 rpms, boost cut set at 21 psi, anyone have this issue?

setup:
b16a, with cable b16a trans
brms top mount
precision 4831
tial 44 wastegate
....

i have all the components to run boost by gear, but i havent had a chance to installed all the parts in yet. but i figure the change in management wouldnt caused this rite?

i check my vac lines from turbo to wastegate and they seem fine.

all suggestions will help. thanks

 

It is called, GET A TUNE!!! No crap it runs different...

 

i gave it a street tune, it runs fine, why waste money on a tune for a street purpose??? dyno tune is in the works with new motor setup. so ur applying that the increase boost is from the tune, despit nothing being changed to the boost components??

 

doesnt make much sense if all you changed was from crome to neptune.

just a wastegate with no boost controller? any manual or electronic boost controller?

what wastegate spring do you have in?

 

yea, it just doesnt make any sense that the change from crome to neptune would cause this, this is a first for me. its straight up wastegate. with the combo springs rated for 17.2 or so psi according to tial.

 

How does it not make sense? Clearly you don't tune with CROME enough to understand what the timing tables do at those PSI. Also, if values were copied, everyone knows they don't align from program to program.

If nothing was changed outside the program, then boy oh boy, I wonder what the problem is. "boosted D" do you even understand excessive timing retard causes boost to build on its own? If the values were just copied from CROME and it was actually tuned on that program, then the final value would be much less than a "decent" program.

 

^^ your just a bundle of joy aren't ya.....

Anyway OP, I was going to say that timing changes were the only reasonable explanation, but I remember chatting about your tune, and if I remember correctly, your running more timing now with neptune than you were with crome, correct?

 

Yea, I'm running more timing now and a leaner a/f ratio.

And no I didn't copy and paste from Crome to Neptune, people and their conclusion...

 

still must have something to do with timing values, is the 21 psi a bad thing? post a pic of your timing table.

 

I'll do that and send it to you, the tune isnt finalized yet but once I figure out how to save the image I'll send it to you. And 21psi is pretty high for just and piston rod combo, block guard...it's still my dd and I drive it to work everyday.

 

can the butt dyno tell a big difference from the extra 4 psi?

Oh and post the pic up on here, so everyone can see it

 

Well I honestly don't know what the boost level will be, and I'm not gonna find that out. Just want to limit it to 21 psi.

 

I came to my conclusion due to your lack of information. You kids come on here and say "My car is broke, fix it" and that is supposed to mean something? On top of this there have been many lengthy discussions where I have been put in a time out over on your latest question. PSI means nothing by itself. It has everything to do with cylinder pressures/horsepower/detonation. Stock blocks have been ran well passed 30 psi for lengths of time, it is all in the tune; and for somebody to be asking about the "butt Dyno" that is the dumbest stuff I have heard lately. You are out of your element "boosted D".

Learn how to tune and check datalogs, pull plugs, watch EGTs, ect...

 

I see, I didnt realize you were hitting boost cut, I thought it was just creeping a few psi but staying off of boost cut.

One option you have before paying for a full dyno tune, is getting a base map made by a good tuner, then you can tweak it slowly till your happy with it, chris harris at xenocron.com charges like $30 I think and he is an excellent neptune tuner, as well as many others, worst case is you waste $30, best case you have a tune that doesnt cause the boost creep.

 

I was going to say that is sounds to ME like you don't know what you're doing but I'm not gonna say that. CROME. Meh.

 

Are you using a boost gauge to monitor boost pressure or datalogging from your map sensor?

 

both

 

okay here are the maps, there not finish yet. i stop because of the boost issues.

high cam ing



high cam fuel



give me some input, thanks.

 

Okay. NOW I'm going to say it. You don't know what you are doing.

 

lol, this isnt finish. just started, feed my your knowledge.

 

Agreed.

 

****. You cannot even whip up a decent basemap and you claim you street tuned it previously on CROME? Hell, I can even create a basemap. Have you bothered looking at the videos that walk you through this step-by-step?

 

damn, go rent a dyno for an hour if you can tune it yourself.

 

like i stated above, this was just the start until i ran into the boost issues, and my crome map with only 14psi ran through the 1/4 in 12.2 with no dyno time at all, and drives like a champ.

**** aside, i stop rite around 5-6500 rpms because of the boost issue, i havent even touch those map settings yet.

instead of bashing like typical forum members, give me some input, if ya are all some know it all. thanks.

 

I did give you input; go watch the how-to videos because you don't seem to have a clue. Take it to a tuner and have them show you what a real street tune is supposed to look like. How about that for starters?