big 16g turbo and safc

[cbr600teardrop]

so im buying a big 16g ported and clipped turbo and a safc2 for 475 off a buddy how well will it do with my setup like turbo lag when will it hit full boost 20- 22 psi my parts are in my profile

 

[AjWit]

well, you will strongly benefit from having 550cc+ injectors and at least a walbro 190. you can run the 16g and safc by them selves, but i really recommend getting those other items i listed to help you with your afr.

 

[LiquidX]

so im buying a big 16g ported and clipped turbo and a safc2 for 475 off a buddy how well will it do with my setup like turbo lag when will it hit full boost 20- 22 psi my parts are in my profile

You should be arounk 3k, if not lower for 20psi. Just make sure it's all tuned first before trying to run high boost.

The lag on a 16g is just a little more than a 14b, but with it clipped it'll spool faster but lower the higher psi efficency.

AjWit, if you looked at his profile you would see he has 650's and a rewired 255.

 

[cbr600teardrop]

yea i got a few upgrades i hoping to be in the low 12s or mid 11s around 350 awhp for now

 

[dsm-onster]

clipping will greatly SLOW the spool speed not increase the spool speed. You'll never get anywhere near the potential of that turbo with the stock maf. It will drop counts and run lean at 30ish lb/min. You need a 2g maf or MAFT.

 

[knochgoon24]

You also might start knocking by pulling that much airflow to compensate for the injectors. You timing will be pretty aggressive. 20-22psi might be a stretch because of timing without any other way to compensate for the injectors.

 

[cbr600teardrop]

i do have a 2g maf in my modifacation page

 

[JusMX141]

The lag on a 16g is just a little more than a 14b, but with it clipped it'll spool faster but lower the higher psi efficency.

You have that backwards.

A clipped turbine doesn't "cup" the exhaust flow as much, so it will lower the turbine's ability to generate boost while raising it's ability to flow.

This lower turbine backpressure will add lag, but also flow better....much like going to a larger turbine.

 

[JusMX141]

so im buying a big 16g ported and clipped

Is it really clipped? From what I've seen more than half the turbos that are advertised as clipped are NOT. Many guys use this in the description as if it's going to be some type of selling point....meanwhile, if I were buying a 16G to use under 20psi, I'd steer clear of one that was clipped.

Clipping a 16G will do nothing unless you're trying to sustain an extremely high boost level all the way to redline, or you're running a much-higher-than-stock compression ratio and would benefit from the added exhaust flow.

 

[LiquidX]

You have that backwards.

A clipped turbine doesn't "cup" the exhaust flow as much, so it will lower the turbine's ability to generate boost while raising it's ability to flow.

This lower turbine backpressure will add lag, but also flow better....much like going to a larger turbine.

Thankyou for fixing my mistake. I honestly did think that the clipped turbo let it spool faster. Makes sense though as there is less fin for the exhaust to catch to spool it.

 

[cbr600teardrop]

yea its supposed to be clipped how can you tell it don't really make a difference for the price of them i think its a good deal any body else the turbo has less than 15,000 miles on it and never got pushed above 15 psi and its better than a 14b

 

[JusMX141]

Look in the turbine housing. If it looks like the turbine on the left, it's clipped. If it looks like the one on the right, it's not. If you have any questions, post a pic and one of us will help you.

At 15psi, a clipped turbine was doing absolutely nothing for the previous owner.

 

[cbr600teardrop]

OK so its probably not then huh? but still better than 14b

what psi should i run to get the most out of the turbo iv read some where between 20-25 psi does that sound right? ill send my dsm chip back off and have it remapped what fuel pressure should i run ifc 650cc i was going to run it at 55 psi that's at 80 to 85 % duty cycle 723cc at 8.1:1 compression ratio