Crossy's son

I got my new EGT gauge installed tonight, I will probably take crap on here for it since it's electric but it is autometer and was $190, It's grounded straight to battery.

Anyways my truck has a DennyT pin, unknown amount of fuel screw but it has been tweaked, stock timing, stock gov. spring, and the star wheel is down a few turns....Has HX35 with a 12cm and the wastegate actuator is wide open......Also has stock intake but a 4" after DP exhaust with a muffler.

At 70 in 5th on the highway, if i nail it , it doesn't take long for it to hit like 1400. Haven't seen 1500 yet.

I see about 1300 on a strong pull in 4th.

do these numbers sound high? the 93 runs the same number with fuel screw maxed and same turbo and all but the wastegate is welded shut.

I'm only getting like 27-29 PSI of boost MAX, never seen 30.

Is it possible the wastegate is letting boost out without me hearing it? the Guy before me that put it on said he never messed with it, just left it unhooked.

I have a feeling these numbers are too high and boost is too low. I'm towing heavy tomorrow in PA mountains and am kinda shaky, i thought they'd be like 1200 max.

Brandon

crewcabxlt

could be a wastegate or boost leak issue. in my past tow testing the hx cooled better at boost up to about 35 psi

wannadiesel

Boost seems low, look for leaks.

Crossy's son

It has a custom welded intercooler i am starting to point towards that.

I verified the wastegate is not welded shut because i was opening it with the air nozzle coming out of my air compressor but i had to set it at like 60 psi for it to move.

I did try to wire it shut though, seemed to work...took it for a ride and found no difference.

jimbo486

Pull the intercooler and cap the ends with a valve stem in one cap. Then pressurize it to 10psi and start spraying some soapy water. Or listen for leaks if one's that big.

Richie O

Crossy, my 92 with just a ground stock pin will get to hot towing. I can get to 1300. Still have the crappo 21 so that does not help move much air. My tamper cap is still on the pump. It does not take much fuel to get things hot.

dieselJon

I could only hit 22psi and 1200 with a custom grind pin, stock sticks, stock 18cm turbo with an auto. Sounds right to me...

fatt

Those numbers look right to me. Also, an internal gate doesn't make any sound when it opens.

KD93

I think he has an external gate, judging by the 'wiring it shut' comment.

Brandon, the best way I've found to find leaks is to run your engine at idle, and spray a shot of ether on any area you suspect has a leak. The idle will jump a little if you have a leak. It usually takes a few seconds for the ether to make it to the intake, so just do a shot every 10 seconds or so and see what you get.

jimbo486

Any wastegated turbo has internal gate. An external gate is a different animal and is typically bolted between the manifold and the turbo. External gates waste exhaust gases before passing through the turbo whereas an internal gate doesn't waste the gases until it has passed through the turbo. Wiring an internal gate shut means you hook or loop a length of metal wire to the arm to keep the puck from opening.

KD93

Ahh! I didn't think it was possible to tamper with an internal gate. Apparently NOTHING is tamper-proof! Thanks for the info Jim.

Crossy's son

Well i just went up and got my snow plow off the previous owner, and he told me alot more about it he forgot last time.

It has 60hp diesel dynamics injectors in it he put it in 2002, he said the fuel screw is in exactly 1 turn and the AFC was all stock.

He said he has the old stock injectors, if he finds them he will ship them to me. He didnt turn them in as cores.

JBradley500

that makes sense. not that it matters to you now but my truck ran like 21psi of boost with the stock injectors and turbo with the pump cranked.

JustRamIt91

Just put a he351 on it. my egts get high quick after 3k with the he351... but it does make 15psi almost instant and holds 40-45... in 4th pegged from 1300-3000 im still under 1200*