he351 boost psi

***trupster415*** · 03-10-2010, 09:56 AM

i just put my he351 on the runner and i'm only getting around 21 pounds of boost and with my old hx35w i was getting 35 pounds. all i've done so far is pull the elctric part off and plug the hole. is this normal?

dragrdan · 04-17-2010, 01:28 AM

pull that plug and look into the hole. you'll see two holes, one that runs straight in, and a smaller one that runs off at about a 45 degree angle back to the inlet
that little hole has to be plugged, otherwise you are running boost pressure right back to the inlet of the turbo.

Jim McCarty · 04-17-2010, 01:43 AM

I believe that's all the boost you're going to get without an adjustable boost elbow. It will bleed off some of the boost going to the wastegate operator allowing it to build more boost before it opens the wastegate.

1stgenjake · 04-17-2010, 01:01 PM

tack wield your waste gate shut

The_Head · 04-18-2010, 07:31 PM

Don't weld anything, but do find a way to keep your wastegate closed. That way, when you decide to sell your HE351, it will be easier.

Then adjust your pump to get boost up to around +/- 38 psi if possible.

carl48 · 04-18-2010, 07:44 PM

MOST ARE DRILLING AND TAPING A 1/8 NPT AND installing a boost elbow i cut my solenoid into and make mine i just bought a second he351 to do another conversion and it did not have the solenoid with it. if you go the boost elbow route i would like to buy your solenoid

***trupster415*** · 04-18-2010, 11:09 PM

Quote:

Originally Posted by carl48

MOST ARE DRILLING AND TAPING A 1/8 NPT AND installing a boost elbow i cut my solenoid into and make mine i just bought a second he351 to do another conversion and it did not have the solenoid with it. if you go the boost elbow route i would like to buy your solenoid

how about 20 bucks shipped?

patracy · 04-18-2010, 11:12 PM

Quote:

Originally Posted by 1stgenjake

tack wield your waste gate shut

Do NOT do that. I've had two people PM me already with HE351 issues caused by welding the gate shut. Use a boost elbow.

The_Head · 04-18-2010, 11:32 PM

On my HE351, the shaft was welded. You should tell us what kind of issues arise when the wastegate is welded shut. I never had any issues with mine, but who would want it now with the shaft welded the way it is? That's why I don't condone doing any welding. A boost elbow is the best way to go no doubt.

patracy · 04-19-2010, 05:54 AM

Quote:

Originally Posted by The_Head

On my HE351, the shaft was welded. You should tell us what kind of issues arise when the wastegate is welded shut. I never had any issues with mine, but who would want it now with the shaft welded the way it is? That's why I don't condone doing any welding. A boost elbow is the best way to go no doubt.

Both cases were with P-pumped trucks and gutted or modified AFC's. Basically WOT is no longer possible since the turbo spins up so high. In a VP'ed or CR'ed truck it's not as much of a problem since it can be turned down. My 351 responds well up to about 40psi. Once you get into the 50+ range, drive pressures are at 70psi. It just seems like 40-45psi is the sweet spot. I opened up the wastegate port to a little over 1". Added a boost elbow, and a spring on the wastegate arm. I'm thinking about taking off the spring though.

gotacummins · 04-19-2010, 07:59 AM

Quote:

Originally Posted by carl48

MOST ARE DRILLING AND TAPING A 1/8 NPT AND installing a boost elbow i cut my solenoid into and make mine i just bought a second he351 to do another conversion and it did not have the solenoid with it. if you go the boost elbow route i would like to buy your solenoid

i sell you mine

03-10-2010, 09:56 AM	#1 (permalink)
*trupster415* Newbie Join Date: Feb 2010 Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Score: 0 reviews trupster415's Truck Pics	he351 boost psi i just put my he351 on the runner and i'm only getting around 21 pounds of boost and with my old hx35w i was getting 35 pounds. all i've done so far is pull the elctric part off and plug the hole. is this normal? __________________ 1990 toyota 4door 4runner. 1st gen 12v, P.O.Ds, 32GSK. piston LP, HE351. 1/8 turn from runaway. built 47rh with HTS vb and a billet tripple disc t/c. http://www.pirate4x4.com/forum/showthread.php?t=760359

04-17-2010, 01:28 AM	#2 (permalink)
dragrdan Cummins Fan Join Date: Aug 2008 Location: canton, oh Posts: 68 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Score: 0 reviews dragrdan's Truck Pics	pull that plug and look into the hole. you'll see two holes, one that runs straight in, and a smaller one that runs off at about a 45 degree angle back to the inlet that little hole has to be plugged, otherwise you are running boost pressure right back to the inlet of the turbo. __________________ '93 W250, 5sp, gauges, pump turned up, DDP Stage IV's, DennyT pin, stacks, BHAF, more on the way as $$ allows, lol OHIO COAL ROLLERS

04-17-2010, 01:01 PM	#4 (permalink)
1stgenjake Cummins Nut Join Date: Mar 2009 Posts: 481 Thanks: 3 Thanked 4 Times in 4 Posts iTrader Score: 0 reviews 1stgenjake's Truck Pics	tack wield your waste gate shut __________________ FOR SALE!'93 w250- PODs, Isspro 4k tach, autometer boost, fuel pressure, and EGT gauges, 4" dp to 7" chrome miter cut single stack, BD fuel pin, pump maxed, 366, Amsoil cold air, DTech S300 62/65/12, Valair ceramic clutch. piston lift pump, ARP studs

04-18-2010, 07:31 PM	#5 (permalink)
The_Head Cummins Nut Join Date: Sep 2008 Location: Worland, WY Posts: 345 Thanks: 1 Thanked 6 Times in 6 Posts iTrader Score: 0 reviews The_Head's Truck Pics	Don't weld anything, but do find a way to keep your wastegate closed. That way, when you decide to sell your HE351, it will be easier. Then adjust your pump to get boost up to around +/- 38 psi if possible. __________________ 1992 Power Ram 250.. dog dish hubcaps and beauty rings. slow, quiet & reliable

04-18-2010, 07:44 PM	#6 (permalink)
carl48 Diesel Freak Join Date: Jan 2008 Location: ruidoso new mexico Posts: 534 Thanks: 0 Thanked 27 Times in 24 Posts iTrader Score: 0 reviews carl48's Truck Pics	MOST ARE DRILLING AND TAPING A 1/8 NPT AND installing a boost elbow i cut my solenoid into and make mine i just bought a second he351 to do another conversion and it did not have the solenoid with it. if you go the boost elbow route i would like to buy your solenoid __________________ 063500dually4X4qcg56,dynatrac,bd exhaust brake,donaldson m090535muffler,cfm+,winspeed spacer,smartyjr,taylor wings,luberfiner bypass filter,psm cold air,cool hose,tag,air tab's,pdr cam,ddp50hp injectors,htt 62 65 13ss,ss manifold, turbo and manifold blankets

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04-17-2010, 01:43 AM	#3 (permalink)
Jim McCarty Cummins Fan Join Date: Aug 2008 Posts: 31 Thanks: 0 Thanked 2 Times in 2 Posts iTrader Score: 0 reviews Jim McCarty's Truck Pics	I believe that's all the boost you're going to get without an adjustable boost elbow. It will bleed off some of the boost going to the wastegate operator allowing it to build more boost before it opens the wastegate.

04-18-2010, 11:32 PM	#9 (permalink)
The_Head Cummins Nut Join Date: Sep 2008 Location: Worland, WY Posts: 345 Thanks: 1 Thanked 6 Times in 6 Posts iTrader Score: 0 reviews The_Head's Truck Pics	On my HE351, the shaft was welded. You should tell us what kind of issues arise when the wastegate is welded shut. I never had any issues with mine, but who would want it now with the shaft welded the way it is? That's why I don't condone doing any welding. A boost elbow is the best way to go no doubt. __________________ 1992 Power Ram 250.. dog dish hubcaps and beauty rings. slow, quiet & reliable

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