reducing lag in a 16g

[DSMeclipse4G63]

whats turbo lag???? I have a stock motor and a big 16g ported and clipped(lag inducer) and I see full boost by 3000rpms if not a tad sooner. any 16g WILL not have lag if you think it does then you need to go back to the t25...
Andew

 

[bus]

all I have to say is "2.3" that is the end all to lag on anything.

 

[Dfish1]

thanks for the responses, for those of you who want to be a-holes join a honda board. I'm new to dsm's so I didn't know a 16g is considered tiny turbo with no lag, I also haven't driven dsm's with bigger turbos, so I wouldn't know... so chill out. MAFT huh? what is that. 1le, the prevouis owner was also running a little rich (.94-95 on O2) so it might help to lean it out a little?

 

[PieTSI]

Check for boost leaks and check for exhaust leaks before or at the turbo. Those will help speed up spool.

 

[Kevin Jewer]

all I have to say is "2.3" that is the end all to lag on anything.

Thats funny, my turbo still doesnt hit 25 psi till over 5000 rpm Its all relative. With a 16g on a stroker, you will be running much lower boost. Thats a good thing, but some poeple dont look at it properly (airflow, not boost).

dfish1, dont take it personally, its just some friendly sarcasm

 

[allturbo]

any 16g WILL not have lag if you think it does then you need to go back to the t25...

...umm, put some bigger cams in first then get back to me. Anyways I'm not complaining that my car is laggy, cause it's far from it. Although if you compare it to how a t25 spools, you WILL notice that it's slower. BTW, I think my car has some lag but I won't go back to a t25 because I like trapping 108mph on pump

 

[kpt4321]

Take some timing out. that'll help the spool.

Not a good idea. Yeah, it will spool the turbo quicker, but you will also make less power while the turbo is spooling. The net result is your car won't be any faster and it will feel crappier.

 

[Kevin Jewer]

Another thought I just had. On setups modifying the airflow signal, while the turbo is spooling the airflow will be quite low at the ECU. Odds are its giving too much timing during spoolup. I think youre right kyle, if timing is already set up properly. But most people are far from it, on AFC type setups.

 

[1LE]

Another thought I just had. On setups modifying the airflow signal, while the turbo is spooling the airflow will be quite low at the ECU. Odds are its giving too much timing during spoolup. I think youre right kyle, if timing is already set up properly. But most people are far from it, on AFC type setups.

IMO, the 2g ECU pulls the timing too far back while the turbo is spooling.

 

[Kevin Jewer]

But my point is, take 30% fuel out compensating for injectors and does it still pull too much out? Looking at one of the middle load timing maps, you would have 25 degrees by 2500 rpm, on this particular table. 33 degrees on the lowest load map, and 7 on the hgihest at that same rpm, for comparison. So I dont think your statement can be made without some qualification based on what load table the ECU is using on a given setup. And my point is that that will vary based on the tuning setup in place, namely anything that alters airflow before the ECU.

My logs seem to be dead on for the highest load map, dropping as low as 6 below 4000 rpm (short shifted 2nd thanks to wheelspin in 1st), but not below 12 in the other shifts (~5000 rpm). I dont think 12 degrees is unreasonable. But spooling up from low rpm, I wouldnt hit 10 degrees until ~4800. So in that case its low.

 

[jmakado]

Check for boost leaks and check for exhaust leaks before or at the turbo. Those will help speed up spool.

just in case you didn't catch this^^^^^^^ i second that idea. nothing like getting full boost 300rpm's faster by finding a boost leak!

 

[Dfish1]

might be a stupid ? but how do you check for boost leaks. It would be @ the intercooler plumbing and where else?
maft was also mentioned whats maft?
thanks

gsxracer I can take some sarcasm

 

[1fast97gsx]

might be a stupid ? but how do you check for boost leaks. It would be @ the intercooler plumbing and where else?
maft was also mentioned whats maft?
thanks

gsxracer I can take some sarcasm

Boost leaks can happen a lot of places ... go to vfaq.com and see how to make the boost leak tester. Make it .. use it ... report back.

 

[98spydert]

Use vfaq to make a home made tester for boost leaks (probably costs $5) and the MAFT is the translator allowing us to use 3" or 3.5" general motors MAF.