Twins issues?

[seeker1056]

is it possible not enough engine heat was contributing to my boost woes?

Today in 31 celcious heat, the motor finally got up to 190F from its normal 160F degrees water temp. No fan on it yet

Having said that the motor was much more responsive and I gained 5 psi boost.

Motor was climbin hard past 52 psi when i took my foot outa it cuz I dont have studs. YEt.

secondary was runnin 26 psi, primary was at 26 psi, and total boost was 52+ and egts 1250, drive pressue at 55 psi all at 2800 pm

[bgilbert]

NO, you can run these up to max boost ice cold or when the t-stat is open. Although it's not a good thing to hammer on them when cold. This sounds to me like KSB issues. The cold start advance on the injection pump. It's probly been staying energized all this time when the engine wasn't WARM. On a late model KSB, this would be advanced timing, hence the less boost from advance timing. Once you had it WARM, the ksb finally shut off and went back to normal timing, hence 5psi more boost.

Then again, you might have an early ksb system and or you don't have it hooked up, allowing it to be advanced all the time... lots of factors.... Was this engine non-intercooled from the factory?

[seeker1056]

hmm, the ksb (if you mean the little cylinder with an electrical connection and small line to the pump)is not hooked up and I have no idea how to do that - remember this is a Ford swap. so no wiring harness.
The electrical connection goes where? and should be energized after coldstart or nonenergized?
thanx

[gman07]

I also thought about timing/KSB issues, but that wouldn't cause high drive pressures. I'm still thinking the HX35 is junk.

On non-IC trucks, the KSB is a wax motor type. Having it unplugged would cause something like 7* timing advance all the time.

On IC trucks the KSB is the opposite. When it gets 12V it advances the timing. There are differences in appearance too, but I'm not sure what they are.

[seeker1056]

mine is a 93 ic motor.

So if i put a hobbs switch on it, the ksb would come on at a certian boost level and add timing for a top end run?

Good/ bad?

[TOMTOM]

you got me thinking. what if?
TOMMY

[Begle1]

The KSB, according to Wannadiesel, advances timing in a less-than-optimal way... Leaving them unplugged wasn't supposed to be good for longetivity; for some reason it was recommended to pull the wire to see if you'd like the advanced timing, and then move the pump if you did.

[bgilbert]

The KSB, according to Wannadiesel, advances timing in a less-than-optimal way... Leaving them unplugged wasn't supposed to be good for longetivity; for some reason it was recommended to pull the wire to see if you'd like the advanced timing, and then move the pump if you did.

This is the case if you have an early ksb system. The later ksb like he has (93) doesn't operate that way. Leaving his unplugged the pump will be normal timing, never advanced.

[B18B1LS1]

Not sure if this helps or not, but I was having the exact same problem with a junk WH1C 12cm I installed this weekend. Low boost and crazy egts compared to my stock H1C with a 18cm. Turned out that the WH1C had really bad bearings and the exhaust wheel ate into the exhaust housing. I was just simply switching over the exhaust side onto my existing H1C and never noticed the damge to the housing itself. It was letting the air slide right by the wheel instead of spooling the turbo up. So now I'm back to the 18cm and all is well.

[seeker1056]

interesting side note - I picked up 4.5 mpg after installing the POD's and 666 spring. Now at 18.5 mpg

[Fnschlaud4620]

I am having boost problems too.

I make only 28 lbs on a hard launch, never more than 1100 deg.
and it get less and less the more I do it. This is with a stock untouched pump and 435 injectors. But then I hooked up a scan tool to the computer. I have 1300 rpm slip in the torqure converter. One time when I was in OD and the converter locked It was going up to 32 lbs of boost, then POW! I guess PVC pipe connectors should only be rated to 25 psi.
I will have to get a real turbo connector, and a good torque converter.
I have all kinds of power and nothing is going to the wheels.

[92 D/UNIT]

interesting side note - I picked up 4.5 mpg after installing the POD's and 666 spring. Now at 18.5 mpg

whatever happened did you get things figured out ?/ did you dyno it?

[therabbittree]

have you sealed the turbo inlet with a fernco and a pcv pipe cap tapped with psi gauge and a barrel valve.. hook it up to aircompressor and check for leaks.. thats cheap and easy too besides a turbo issue i think you may have a leak
any pics you can post of you setup..that may help us figure out tyour issue.. you seem to be able to swap single to twins pretty quick not sure how you did your plumbing?.. i know there no way i could just swap it out on my older twins setup ..that easy..i'd have to change a lot ..
Thanks
Deo