Question: Twin Turbo kit

[MAXLLY]

have you checked the shaft play on either turbo ? a guy i race with just got through having simalar problems with his truck .... high egt's and high DP with his twins ...... chased boost leaks... none..... after a long while of hunting he found out that there was a problem with the big turbo, bearings went bad prematurly had tons of end play wich made the turbo drag creating a restriction on the hot side and high egt's/DP . switched turbo and all is good now .

Did he put a gate on it to avoid this in the future? To balance pressure between comp/turbine?

 

[duratothemax]

im seeing 50lbs boost how do i have a boost leak?

trust me, its possible.

My twins still made 45psi (and high EGT's) with that hole in the intake pipe...no joke. We are talking about a LOT of airflow here with those big twins.

ben

 

[TrentNell]

Did he put a gate on it to avoid this in the future? To balance pressure between comp/turbine?

it was gated , dont know the specifics i have hear bits and peices from him . but i thought the same i figured the gate would take that charger out of the equation for DP restrictions but it didnt for some reason seems like the more i learn about compound turbo's the dumber i feel :rofl:

 

[IdahoRob]

ive even tried lowering the pw to 2800 and still have high egts, but im seeing 50lbs boost how do i have a boost leak?

Every twin truck I have tuned with high egt's had a boost leak. I know a couple ihi twin trucks that made 60+ lbs with a single cp3.

 

[mytmousemalibu]

Whats your opinion on the IHI-Twins setup rob? Is it worthwhile to ditch it or keep the sucker? 60Lb on a single CP3 sounds decent to me, but hows tuneing? I had also planned to get a 60mm gate for the S400 and of course one for the hi-psi charger if i get somthin else thats ungated

Just tryin to get more info/ideas to make a informed choice

Again thanks for the help fellas!:hug:

 

[Subman]

where on the intercooler was this leak? which side?

Leak was on the bottom on the corner on the intake side, was very difficult to find to to where it was, but it was a big leak.

 

[02bigstrokin]

have you checked the shaft play on either turbo ? a guy i race with just got through having simalar problems with his truck .... high egt's and high DP with his twins ...... chased boost leaks... none..... after a long while of hunting he found out that there was a problem with the big turbo, bearings went bad prematurly had tons of end play wich made the turbo drag creating a restriction on the hot side and high egt's/DP . switched turbo and all is good now .

the turbo shaft play is fine. the gt45 only has maybe 6k on it and i checked the small one when i ported the intake horn. im going to rig up a way to test for leaks like you did with the pipe plugs. hopefully i do i have a leak and can fix it and be happy with them like everyone else.

 

[TrentNell]

the turbo shaft play is fine. the gt45 only has maybe 6k on it and i checked the small one when i ported the intake horn. im going to rig up a way to test for leaks like you did with the pipe plugs. hopefully i do i have a leak and can fix it and be happy with them like everyone else.

the pipe plugs work well , but the turbo i mentioned before has less than 1k on it just defective from the get i guess . just a few things to check .

 

[02bigstrokin]

yeah im working on the plugs. my dp is only at like 70 @ 50 boost so i dont know about the charger being bad?

 

[timlb703]

Try swaping the big charger wastegate tube where you adjust it. I never ran as hot as you are talking about and I would guess I was pushing more fuel.

 

[wkinsley04]

is there a common place that the twinned trucks normally develop a boost leak? i have no problem burying my 1600 degree egt gauge

 

[cole30]

What's the best way to check for leaks on a twin set up?

 

[Subman]

build yourself/ have built or borrow plugs that you can isolate the system. One needs to have an air gauge/valve on it so you can pressurize the system