**FOR YOU GUYS CONCERNED ABOUT LAG**
- Thread starter drewgo
- Start date
OneJSupra said:Here's mine with stock ecu @ 12psi with bpu and walbro 255 pump. I'm in love with the twins as you can see :love:
It's just as I described it.
thank you
Boostage said:
I do agree with opening up the exhaust is a great way to reduce lag, cause the best exhaust is no exhaust on turbo apps. But saying timing is going to make a big difference on lag is a bold statement, can you explain to me why not? Cause I personally have seen lots of cars make much better spool and power when you play with the timing.
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Spaniard said:
Think U meant to say the best exhaust is no exhaust on a turbo car. and I did explain already. Im my experience running really aggressive timing only helped off boost throttle response, but spool wasnt affected. every setup is different, this was just my experience.
Right guys, every setup is different but I've personally made logs of the difference in spool time with more agressive timing. I made 10PSI 600 RPM sooner.
I'm with Drewgo. The stock ecu timing and fuel IS tuned for the stock twins like he described. What amount of gains you can achieve depends greatly on all other components and in which combination they are used; what type of in- and ex manifold, type of cams, type of turbo, type of IC, exhaust size, etc etc.
But the fact is that there ARE gains to be made in spool-up by tuning the timing, what the result is is dependent on the rest of your set-up.
Actually all good tuners will know that timing IS everything in making power and the distribution of it on the powerband, it's a bigger factor than fuelling...
But the fact is that there ARE gains to be made in spool-up by tuning the timing, what the result is is dependent on the rest of your set-up.
Actually all good tuners will know that timing IS everything in making power and the distribution of it on the powerband, it's a bigger factor than fuelling...
Look at both dyno sheet and see for yourself the power curve.
Now if someone with a fully turned 1jz running a standalone can post up a dyno sheet, you will see that the timing has been tuned and lag is now only present because of the size of your backhousing. On a .68 a/r you should hit 20psi around 37-4000rpm, which is consistent with What hottscennessey said regarding quicker spool due to tunning.
Now if someone with a fully turned 1jz running a standalone can post up a dyno sheet, you will see that the timing has been tuned and lag is now only present because of the size of your backhousing. On a .68 a/r you should hit 20psi around 37-4000rpm, which is consistent with What hottscennessey said regarding quicker spool due to tunning.
I didn't really read anything other than the first post, but I want to say this -
If you are asking whether timing affects your spool, the answer is yes.
Airflow = power.
More power (due to proper timing) = more airflow.
More airflow = faster spool.
That's it, in a nutshell
If you are asking whether timing affects your spool, the answer is yes.
Airflow = power.
More power (due to proper timing) = more airflow.
More airflow = faster spool.
That's it, in a nutshell
Doward said:I didn't really read anything other than the first post, but I want to say this -
If you are asking whether timing affects your spool, the answer is yes.
Airflow = power.
More power (due to proper timing) = more airflow.
More airflow = faster spool.
That's it, in a nutshell
Great way to sum it up.