Hello guys,

As most of you already know from my ongoing thread here in forced induction I've had some very very bad luck with my build this year. From the tranny blowing up on the dyno on pump gas then having a brand new engine destroy bearings after 900 miles of street driving.

Anyways, the car was back on the dyno today thanks to guys at Slowmotion Motorsports. The entire setup is brand new for 09 with the newest edition of skunk 2 tuner 1 cams. Corey was telling me the spool time increased by 300-400 rpms and seems to be pulling VERY hard.

On to the topic of discussion. He called me and said that we were having the same problem as before, boost creep on pump gas. He said the gate was opening at 11-12psi then creeping to 20psi by 8k so he didnt want to rev it any higher....

As a temporary solution we're just going to put race gas in it and tune it with the creep so I can at least get the car tuned and home to fix some issues. Now, the car has my(RMS) vband ramhorn with the tial 44 gate and vband gt35r .82ar. Corey said that with such a free flowing setup like mine the gate just cant keep up.

I need some options here guys never had this problem in the past. Car also has aem boost solenoid controlled by AEM. Thanks a lot!

Ryan

Heres the car
https://honda-tech.com/forums/showth...light=teglove2

 

put an exhaust on it that wil hold the turbo back a little bit. or get a dual wastegate setup.

 

Probably going twin wastegates

 

Exactly a good twin gate setup will fix your problems.

 

The tial 44 worked well on my ramhorn setup but that was with full exhaust. Twin gates is going to be your best bet.

 

Is the diaphram on the WG pinched?

 

Thx guys....we're going twin disk sometime in the next few months along w the second wastegate...

Check out my other post in forced induction...car was retuned today and made 575whp on just 21psi!!! Skunk 2 cams ftw

 

NO the wastegate is perfect...we switched spings a few times and everything was perfect...the gate is nearly brand new as well

 

ive had this issue on a few different 35r setups on my old engine, i even bought a used gt30r setup from a friend that held 9psi on different engine, put it on my setup with a 13psi spring it wont make anything less than 486whp at 16.5 psi.

most gt35r setups on quality engines dont like to make low boost on a single gate, i always advice a dual wastegate setup for this reason.

 

Well...its too bad I didnt know you personally before i built the manifold I wouldve done it before i installed it lol thx tho

 

Damn isn't that the truth. One thing that helped a bit was making a super short dump tube out of the hood. That brought it down maybe 3 psi, but even with that I can't make anything less than mid to high 400's on spring pressure.

 

I have the same problem with my 35r setup. Mine is on a topmount. I am going to try dual gates.

 

twin gates bump

 

Not to be a broken record, but I'm guessing I'm not the only one who has experienced a real similar situation with my SC6152, since I think they're almost identical to a GT35r in terms of the wheels? Finally I found a nice combination of exhaust (3", but still more restrictive than some), spring pressure, and high RPM creep that I can live with.

 

what spring is in the gate?

is the gate recirc or open?

 

spring is 11psi i think...open

 

its poor wastegate placement, i used a 35r and a single 44 and it held 12-13 psi with no problem to 8500.

the full-race tear drop is what fixes ram horn boost creep

http://www.full-race.com/catalog/pop...e.php?pID=1250

 

My wastegate tube alignment is less than ideal, that is for sure. . .

 

Weld a plate inside the collector that will promote exhaust gases to go into the wastegate, or cut the elbow off and tear drop shape it.

 

many people like to claim its poor wastegate placement because they are using a single 44mm gate and the setup works on their engine, but this just isnt the case on all engines. on certain engine combinations, particularly ones with oversized valves from what ive noticed, it is just unavoidable. ive used a ramhorn kit with a tear drop wastegate port and it helped but still boost crept to 18-20+ psi and on a 35r this is just too much power on the street. this was already the second kit i had on that engine, before that was a top mount kit that crept to 20+psi even with a 6psi spring. i decided to switch to a front mount gt30r kit that held 9psi(325whp) on my buddies setup, after installing that kit it wouldnt hold less than 16psi on the wastegate spring better but still 486whp isnt very ideal.

 

and the answer is get a less efficient turbo!!!
or run it on a b16, they usually do pretty well with creep.

 

lol I've also heard of the teardrop mod not working a setup like mine from a couple ppl on here who pm'd me. We're going twin wg....that way I can run 10psi and actually hook in 1st and 2nd

 

i did the teardrop on my manifold and it helped alittle but i still get bad creep at 8,000. Can you do a 44mm and a new 38mm gate or do you need to do both gates the same size?

 

im going to run twin 44's but i would def want to run the same gates both the vbands.



Keep in mind we have a 11psi spring in it and its creeping to 21psi by 8k. Once we get the boost to hit 21psi around vtec engagement well see huge gains in the midrange.

 

i dont have alot of space and just wanted to try the new mv-s wastegate along with my 44mm.