evo 16g ??

[Patter$on]

i just got the evo III 16g on my 98 gst spyder and i doesnt feel like it pulls hard until like 5000 rpm

shouldnt it spool faster

by the way the turbo is ported and clipped with port evo man. and ported evo o2 housing and n1 downpipe and n1 ehxuast

 

[1fast97gsx]

should be around 4k or less even, but I thought clipping increases spool up. Maybe you have a small boost leak.

 

[RiceKiller_TSi]

Actually I believe clipping "decreases" spool up time slightly but gives more power on the top end by not restricting exhaust flow so much. My EVOIII is unported / unclipped but starts pulling pretty hard around 3500-4000 rpm. I suppose your boost response is later due to the clipping.

 

[Patter$on]

yeah i know clipping does make the spool up time be longer but i was wondering if mine was how it was suppose to be?

 

[coolguy949]

How much did you clip it?

 

[Patter$on]

standard cl;ipping from slowboy and i beleive its like 10 degree

 

[bobo2986]

what are you other mods? do you have any tunning?

 

[Groomz]

For starters you're running incredibly rich with just a fuel pump and no AFPR or larger injectors. Tuning will reduce the spool time significantly. First you have to get an AFPR, then larger injectors ( 650cc/min ). Then get an AFCII and start tuning. I bet you could cut 2K off your spool time with the right tuning. The Evo is not a "big" turbo, so fast spoolup around 3300RPMs would be exspected. Tune, tune, tune.

 

[TurboSpyder99]

Hey I have the exact same problem with my '99 Spyder. I put in the evo 16g and it doesn't even start to pull until 4500-5000, then starting that late barely hits full boost if it even reaches.

If you have tuned it or fixed the problem please let me know, I have been messing around for like 3 months now trying to fix the it, also if there is anybody else that have any ideas please let me know. Thanks

 

[nine5raptor]

Have you guys checked for boost leaks, cause wow. You should be at full boost well before 4000, more like 3300 like groomz said.

 

[coltboostin]

I dont think he is running rich down low, the rich problem with the 255lph is at idle, but when you get going everything is kosher.

It is interesting that more than 1 person is having the same problem, Turbospyder, were did u get your turbo from?

 

[nine5raptor]

Where the fuel pressure drops off depends on the the flow of the injectors. For him, this may be at 4k or more. The only way to find out would be with a fp guage.

 

[TurboSpyder99]

I have checked for leaks. I did find a huge one at the tb, couldn't fix it so I bought the bbk one. That fixed that leak, but I think I still here another small leak though. The only thing is, fixing the huge tb leak didn't really do much. Plus everything ran perfect until night fall, I put in the new turbo and bam all problems start immediately.

Could it be the turbo maybe? I got it from Slow Boy Racing.

Another thing is when I pressurize the system a lot of air comes out of the blow off valve, but I know when you give it gas it closes so I'm pretty sure that isn't the problem.

I think maybe the intake manifold is leaking somewhere, but like I said it seems weird that is would start leaking the same few hours the turbo gets installed.

Anything will help! thanks

 

[KPWSerpiente]

I have the exact same set up: Evo3 16g, ported, clipped, 34 mm wastegate flapper, ported Evo3 exhaust manifold, ported evo3 o2 housing. RRE downpipe and Apex n1 catback. The turbo was purchased from slowboy, and all of the port work was done there. I hit full spool around 3300 rpm just like everyone has said.

If you are not spooling up until 4k you have some problems, and it is not the turbocharger. I would check for some boost leaks and definetly get some injectors/fuel pressure regulator and something to tune with.

How much boost are you guys trying to run?

-T

 

[RipperXX]

Originally posted by Patter$on
i just got the evo III 16g on my 98 gst spyder and i doesnt feel like it pulls hard until like 5000 rpm

shouldnt it spool faster

by the way the turbo is ported and clipped with port evo man. and ported evo o2 housing and n1 downpipe and n1 ehxuast

Cliping any 16g is about as dumb as a pet rock.

But yea some tuneing would defently help, if there is a local dyno shop around take the car to them and try to get the fuel ratio around 11.4 -11.9

And watch your knock, just run as much boost as possible at that fuel ratio without geting more than 5-8 counts of knock and that should grately decress lag...


If I were you though I would sell that turbo for like $100 less than you paid for it and get another and NOT clip it this time.

 

[coltboostin]

What is wron with clipping a 16g?
I switched to a clipped 16g and gain 3mph in the 1/4 with the same settup on my old car. I just happened to get the turbo for free and my 16g was dieing, so I had the clipped turbo rebuilt and it ran much harder on the top end, and lag difference was minimal

 

[TurboSpyder99]

Actually my evo isn't clipped just to clarify. I just took it to the dealership today and they found no boost leaks but did say that I have no vaccuum at the fpr. What does that mean??
Also they said that they suspect it is an internal issue with the wastegate itself, maybe a crack or it is burnt.
Does any of this help anybody out there??

 

[Patter$on]

its weird and i dont knwo why but once i got my boost controller installed right i get boost at about 3300-3500 like everyone else and it pulls all the way but if i turn the controller off then i dont get boost above 9psi untill 5500

 

[ShapeGSX]

Originally posted by Patter$on
its weird and i dont knwo why but once i got my boost controller installed right i get boost at about 3300-3500 like everyone else and it pulls all the way but if i turn the controller off then i dont get boost above 9psi untill 5500

The boost controller delays the boost signal getting to the wastegate. Therefore the wastegate opens later, and the turbo spools faster.

 

[jake98gst]

its weird and i dont knwo why but once i got my boost controller installed right i get boost at about 3300-3500 like everyone else and it pulls all the way but if i turn the controller off then i dont get boost above 9psi untill 5500

How did you have it set up?

 

[Larry L]

Originally posted by bobo2986
what are you other mods? do you have any tunning?

I agree I have a 16g with only a 255lpm and I only push 16 psi to be safe, But on the dyno I was hella fat. I however pull hard from 3500 on to redline.

 

[Larry L]

Originally posted by Patter$on
its weird and i dont knwo why but once i got my boost controller installed right i get boost at about 3300-3500 like everyone else and it pulls all the way but if i turn the controller off then i dont get boost above 9psi untill 5500

Thats because the stock WGA is set at 9 psi and around 5500 you begin to boost creep. I did the same before I installed my MBC.

 

[TurboSpyder99]

Hey, anyone with a evo and a manual boost controller, please let me know how you have it hooked up. I remember trying to switch it from the t25 to the 16g and not sure if I did it right cause the setup is a bit different. I think that might be my problem.

Also I talked to the dealership some more and they explained that the exhaust housing might be burned or cracked at the wastegate flapper, causing boost to leak around it. Does that sound possible?

The idea of the stock setting of 9 psi and then boost creep at 5500 sounds pretty good to me, so I think my controller is messed up, also adjusting it does nothing.

Thanks for the feedback!

 

[jake98gst]

I have mine setup like this. But I think I'm going to switch it so I have the nipple off the compressor housing going into the mbc and then straight into wastegate instead of messing with all the tee's.

 

[Larry L]

I have mine in between the compressor and the waste gate. I've heard of people running it to the BOV, but this way is simpler in my opinion...