To Clip or not to Clip...

[RU2SLOW?]

Im looking into the Evo 3 16G like most others right now, but I have a question. Up until tonight I was pretty much set on having the turbo ported and clipped with the 34mm flapper mod. However, I just read a recent post in which a DSMer said not to clip a turbo, because it's become an outdated method in turbo technology. Now Im starting to wonder if it's worth the money or not. I was hoping that maybe some of you guys that have a B16G or the Evo 16G could chime in and let me know if you think this turbo needs to be clipped or if Im better off pocketing the money I would spend on having it done. Also, if some of you technical gurus could chime in and explain why or why not clipping the turbo would be a good idea I would appreciate that ALOT. Thanks in advance for any help you guys can offer...

 

[KPWSerpiente]

I have mine clipped. If I did it over again, I probably wouldn't do it again.
Clipping delays spool but gives you a little bit more flow on the top end.


-T

 

[blcknspo0ln]

:thumbdown clipping
porting

 

[dets]

what exactly is clipping and how is it bad? what are the possible benifits?


i just want to know for general reasons.

 

[blcknspo0ln]

[ this is from what i know, correct me if i'm wrong]
clipping is "clipping" the top of the turbine wheel, therefore increasing top end flow but increasing lag also. i've also read that clipping leads to a shorter turbo life.

of couse this depends on the degree of the clip, usually 5 or 10

 

[yo2001]

EVOIII 16G seems to do fine without clipping. Just porting should be good.

 

[RU2SLOW?]

Thanks for the responses everyone. I guess I'll just save myself the $75 and use it more wisely elsewhere unless someone can make a very strong argument for having the turbo clipped. It doesnt seem like much, but when you're on a budget like mine 75 bills can go a long way.

 

[ItsStockOfficer]

I think clipping great. Without clipping your utilizing a stock turbine with a bigger compressor, which is silly IMHO. It's a fast spooling turbo anyways, the clip will barelt affect it. My friend with a B16g/10degree clip dyno'ed 319 FWHP on 91 octane....I ran 11's on a clipped 20g....Mitsu turbines love it.

 

[RU2SLOW?]

Ok now you have my attention...I'm thinkin now maybe I would be better off clipping it because I AM FWD and I could probably do without the quicker spoolup of the Evo turbo. Maybe I could make more use of the topend power and relieve myself of a bit of traction issues with it spooling a little slower. What do you guys think about this theory???

PS- Please help I'm even more confused than before now.

 

[ItsStockOfficer]

In my opinion, the spool difference is so minimal, I would trade it for 5 whp....let alone 10-15....I bet if you clipped the 16'g on all these guys cars, they wouldn't even notice the increase in lag....Its honestly like 100 rpm.

 

[4gsx63]

Would a clipped 14b gives more top end than unclipped? I'm thinking about clipping my 14b but I have no way of knowing if its balance or not. What do you guys think?

 

[ItsStockOfficer]

Would a clipped 14b gives more top end than unclipped? I'm thinking about clipping my 14b but I have no way of knowing if its balance or not. What do you guys think?

bad idea....the turbo would have to be pulled, clipped, rebalnced...it would be a hassle for very minimal gains.

 

[greyforestgst]

you cant just go clipping turbine wheels and expect them to turn 100,000rpm

 

[RU2SLOW?]

Back to the original topic at hand...can anyone help me out with the whole clipping an Evo turbo on my fwd theory that I asked about a few posts up? I'm thinkin that slower spool and more top end might be a bit of a better idea with wrong wheel drive. I know we may be talkin apples and oranges here but when I was lookin into a 50 trim a while back I was told to go with a .63 ar housing rather than a .48 for this exact reason by the great folks at AGP so I'm applying that theory to clipping the 16G (obviously with less of a drastic difference than using a larger ar housing).

 

[98spydert]

Well as you were told, clipping is a trade off of spool time for top end flow. With the FWD, yes it will be worth it and posibly benificial as far as wheel spin/hop goes, espcially if you don't care about that .3 second delay in spool. When shifting from gear to gear it's not going to matter. The E316G is a faster spooling turbo than the other 16Gs anyways(so I hear).