When you are just puttering around or cruising on the highway, boost will not be very high. You have to put a load on the engine to make a lot of boost, even with a small exhaust housing. Your numbers sound normal for a 12 cm housing just riding around.

 

so...even at WOT runs with an empty truck...2nd thru 5th...I shouldn't see double-digit boost?

I mash it til it won't "go" anymore in 2nd, 3rd and 4th...just trying to see what it would read...and never saw double-digits...

if that's normal...that's fine with me...and I'll have ~6000lbs behind it in a couple days and will see how different it responds...

Thanks for the feedback...

Greg

 

No, you ought to see more boost than that when you're flogging it. Normal for those conditions would be between 20 and 30 psi depending on how much the pump is tweaked and where the wastegate is set. Is it possible you have the wastegate set so that the wastegate is partly open all the time?

 

the pump hasn't been tweaked at all...

when I had the whole thing apart, I adjusted the Banks so the wastegate was closed when the whole thing was just sitting there...

but, anything's possible...

to make sure I'm going in the right direction...I would need to make the shaft linkage longer to force it closed, right?

and I could follow the suggestion of BC847 and unhook the hose going from the intake port to the actuator to make sure it's not opening soon?

I bought the Banks used from HTT...so there's no telling if it's actually working as it should...I also have a boost controller that I haven't hooked up, yet...cause I wanted it to run "right" in its current setup first...

Greg

 

Ah, you don't have enough preload on the actuator. The wastegate is working great - it's just working at 10 psi! Lengthen the rod some to put more tension on it.

 

gotcha...I'll give it a shot later this afternoon when I get back home, and see what I can do as far as adjusting it while it's all on the truck...

would pulling the hose to the wastegate be a way to test to see if preload is actually the problem?


Greg

 

Yes. You should get more boost.

 

OK...results so far are positive...

I tried to find a write-up online on how to adjust one, and found one somewhere that made some sense...

basically:
1. line up the linkage so it slides over the pin with the wastegate closed
2. screw in the linkage 3.5 turns to shorten it

that would accomplish preloading it, and making sure it held closed...

tried a couple different settings...and right now it's EASILY hitting 15PSI when it was only hitting 5PSI before...

hitting 18-20PSI in 5th wasn't a problem...

so, I think it's probably close to right, since I haven't added any fuel...


how exactly will a boost controller affect it? the one I bought off Ebay didn't really have any instructions...

if mine is maxing out right now, the controller won't build any additonal boost, right?

if it was an issue of the wastegate is still opening a little too soon, the boost controller could be used to tune it?

any tips on tuning it?

should I wait until I do the pump mods? or do it now, and then do it again?

Thanks.
Greg

 

oh yeah...I'll probaby try tomorrow to disconnect the hose and see if it builds anymore...

starting raining today and I didn't feel like working on it anymore...

Greg

 

With the Banks actuator, you should not need the manual boost controller. You can get the boost where you want it just by adjusting the linkage.

You can't get more boost just by adjusting the wastegate. Even if you disconnect the line, you will only get the amount of boost that you have the fuel to make.

As a ferinstance: The manual boost controller on my truck is set for 40 psi. However, in valet mode with no water/meth, I only have enough fuel to make 37 psi. The wastegate isn't even a factor because it never opens.

 

gotcha...

I know the adjusting that wastegate can't actually "make" boost...

I guess what I'm asking is that if I don't have the linkage adjusted properly, where it's still opening too soon...if I disconnected the hose, it would at least make the max boost (might be more than I'm seeing now, might not be) that I can at the current fuel level...

I'm guessing I'll see higher numbers after the 3200 spring and smokey pin install?

Thanks.
Greg

 

oh yeah...and the Stage III whistle is a LOT more noticable now that it's actually making double-digit boost...

Greg

 

Yes and yes.

 

CONTINUED...


OK...got to give the truck it's first "workout" today...Charlotte, NC to Mountain City, TN and back...hauling my Jeep on a trailer...

it didn't feel like it was running as strong as it did when it was stock...

note, I never had a boost or EGT gauge when it was stock, so I don't know how the numbers worked before...

a couple questions...one real basic...one a little more situational...

1. is the basic cause of high EGT's some combo of too much fuel & too little air?

2. if so, does it make sense that my rig...with an H1C, HTT Stage III upgrade and 12cm wg housing...with a completely stock pump (no tweaking)...would run 1300+ degrees when towing ~6,000lbs?


it just didn't seem to have the same oomph that it had before...

I did plug off the wastegate tube to see if I still had a leak there, and saw no increase in boost...still maxed out about 20PSI...


any input? I still just want to make it right before I get into the fuel pin and 3200 spring install...

is a boost leak a possibility?

Greg

 

I say 20 is normal, turn the full power screw in a little and the power should be there !
Really your in the same boat a me! power potential is there, but need eather a intercooler or W/M......OR BOTHto get the EGT'S down so that the fuel can be turned up!!!!