Licp/ compressor elbow?

[underradar92]

So, treating the intake plumbing like a column of air, with inertia. It will take some time for it to slow down on its way to the manifold, and the air in the plenum to compress before the wastegate senses the change, too late. You now have a boost spike, whether your gage is fast enough to see it or not. Am I on the right track? That said, I am going to tap my comp. housing asap.

 

[oldman]

So, treating the intake plumbing like a column of air, with inertia. It will take some time for it to slow down on its way to the manifold, and the air in the plenum to compress before the wastegate senses the change, too late. You now have a boost spike, whether your gage is fast enough to see it or not. Am I on the right track? That said, I am going to tap my comp. housing asap.

If you're refering to #3, anything in the intake tract like leaks, distance (though a small factor since we are talking about pressure)...etc. can greatly affect wastegate timing. The shorter the hose route, the lesser the chance of something going wrong. That said, boost spike is a fairly complicated issue, what has been discussed here is just part of what can cause boost spike so don't expect your problem to be solved every time by just switching the pressure source to the compressor, it will however eliminate leaks as possible cause of your boost spike. Here is an example.

http://www.dsmtuners.com/forums/showthread.php?t=198388

 

[JFZERO ECLIPSE]

ok then i also have my bov t-ed between my bov and intake manny...i dont care what you say bout me call me a noob idc...but where should my 2 lines be theat come from my sbr mbc??? 1. goes onto the licp elbow but where would the 2nd line go IF not t'ed into the bov and intake manny thx

 

[oldman]

ok then i also have my bov t-ed between my bov and intake manny...i dont care what you say bout me call me a noob idc...but where should my 2 lines be theat come from my sbr mbc??? 1. goes onto the licp elbow but where would the 2nd line go IF not t'ed into the bov and intake manny thx

Assuming the sbr mbc is a ball/spring type, the j-pipe fitting goes directly to the fitting inline but opposite to the adjustment knob on the mbc. The other fitting on the mbc goes directly to the actuator, the shorter the hose the better, making mounting location of the mbc crucial as well. NOOB

BTW We are trying to keep tech areas as easy to search and read as possible, using proper capitalization and punctuations in your future tech posts would be greatly appreciated.

 

[staticbrainwash]

Alright, that makes perfect sense. And i will make sure to change mine to fit this set-up. I apologize for my ignorance.

However, i also would like to see some of this information get changed at the source. Maybe write up a new tech article, and pull the old one. Because honestly, thats where i go to for a lot of info. It's just a little suprising to hear there is mis-information curculating between moderators and wisemen.

Anyway, i'll get that changed over when i install my dejon intake and uicp. But about this licp, since it doesn't have the fitting should i just not bother with it? Or would it help to get a fitting in it?

 

[oldman]

Alright, that makes perfect sense. And i will make sure to change mine to fit this set-up. I apologize for my ignorance.

No need, I totally understand where the confusion is coming from, this isn't the first time I had to do this.

However, i also would like to see some of this information get changed at the source. Maybe write up a new tech article, and pull the old one. Because honestly, thats where i go to for a lot of info. It's just a little suprising to hear there is mis-information curculating between moderators and wisemen.

I hate homework! I have been meaning to write some tech articles, it will happen one of these days.

Anyway, i'll get that changed over when i install my dejon intake and uicp. But about this licp, since it doesn't have the fitting should i just not bother with it? Or would it help to get a fitting in it?

11/32" drill bit, 1/8 npt tap and a 1/8 npt to 1/8" vacuum fitting. You can either tap it on the compressor housing or the licp. If the pipes are too thin, I would weld a bung instead of tapping.

 

[underradar92]

If you're refering to #3, anything in the intake tract like leaks, distance (though a small factor since we are talking about pressure)...etc. can greatly affect wastegate timing. The shorter the hose route, the lesser the chance of something going wrong. That said, boost spike is a fairly complicated issue, what has been discussed here is just part of what can cause boost spike so don't expect your problem to be solved every time by just switching the pressure source to the compressor, it will however eliminate leaks as possible cause of your boost spike. Here is an example.

http://www.dsmtuners.com/forums/showthread.php?t=198388

I personally haven't experienced any detectable problems... yet. I am going to change it before I do.

 

[screwdgie]

Ok got an update. Did a boost leak test today, and found 2 leaks. A huge one where my uicp meets the intercooler, and another one at the bov flange. Got those fixed, but havent driven it yet, as I finished up at about 3 am haha. Ill let everyone know how it runs tommorrow

 

[staticbrainwash]

bringing back an old thread, but how did the car drive and everything turn out?

also, r u sure 11/32" is what i need to drill into my licp? all i can find close is a 7/32 and that looks big.

 

[screwdgie]

Well I fixed the leaks with some rtv sealant, yet I think that didn't hold, it feels like I have another leak again, probably the corroded end on the pipe coming off the intercooler.

On a side note, the car was down for 2 weeks bc I screwed up the installation on my fuel pump. Broke the fuel line, and broke some studs holding the cover on. So I had to find a new tank and sending unit. The car runs great now. I logged it, and at 16 psi I have NO knock. Yet i still have boost creep up to 18-19 psi. I need to do some porting. But this weekend i am installing my "boost creep kit" from www.dpconcepts.com. I decided to try it, because it seems almost no one else has. Plus I have virtually no free time to do any porting nowadays.

I'll update after i install the creep kit. I am also going to do a boost leak test and fix any leaks the CORRECT way ( with jbweld) .

 

[staticbrainwash]

good deal bud. im glad everything turned out alright more or less. let me know how that kit works, look interesting.

 

[sweet97]

If you did a search you would find a drawing from one of our members who came up with a very similar design for eliminating creep though you would have to do a little fabbing/scavengeing parts yourself. Mark

 

[staticbrainwash]

i must have missed where it said telling someone to search was ok.

obviously he found this somewhere so why flame him for not fiy-ing it?

 

[sweet97]

i must have missed where it said telling someone to search was ok.

obviously he found this somewhere so why flame him for not fiy-ing it?

I was simply trying to save him a few bucks if he was the tinkering kind of guy. I did not tell him to search. I said IF he did one he would find a drawing where a member came up with a way to open the flapper further.
Gosh I also went over the speed limit today though I am trying to keep it down. No flaming from me. I am all for trying new products. I'm trying a set of Crower stage 4's right now along with a Holset turbo. Both oddballs around here like me! mark!

 

[screwdgie]

Thanks for the advice, I searched a little bit a while back, but didn't find what you were talking about.

We'll see how it works, if not, or it doesn't work well enough, I am gonna try some modifications to the kit

 

[sweet97]

I found it. Do an advanced search for sketch with the author being pickens, it's about the 10th through 15th down on page 1. Mark
Good Luck!

 

[fostytou]

Not to beat a dead horse, but I must have been leaking some air on boost in my 1g... I hooked up my MBC to the outlet elbow and let my 1g blowoff valve source the intake manifold... I noticed a 300-400 RPM better spool in 3rd gear and much less knock... of course transient response improved as well.

....and then I got a speeding ticket AFTER I was done testing