Whats Too Much Boost
 

whats too much boost to run on stock head stud for a 98 12 valve cummins

When the head lifts you know that's too much. This number isn't set in stone. There are factors that need to be considered other than boost.

Upping the timing over 16-16.5* and boost is variable to which turbo.

welcome to diesel bombers and what kinda boost are you running now :humm: and what kinda upgrades have you done nothing in your sig to go by

he doesnt know thats why hes asking gosh:tttt:

haha. i hit 39 psi and my head hasn't lifted yet.

Do you WANT it to lift? hehe. No but 39psi on the stock turbo wont lift the head it will just smoke the turbo after a period of time

39 wont smoke the charger. 52 for 8 months will ask me how I know.

like timing, rpm, and drive press :tu:


my stock head held 55psi @ 3,000rpm with 15.5* of timing for more than 8 months ... but that wasnt a stock turbo ( silver bullet)

i ran 74psi with my twins on stock hg and arp studs. no prob.

lol ya right

what you dont think so? come down to illinois this summer. ill build ya a set of twins:jump:

*gasp* You would? For me? I dont know if I should be honored you are willing to do such a thing, or scared on how hard you are trying to get me to IL :lol: lol

well yeah there may be a hefty bill after the build is all done and installed and your pinning your golb guage in no time. but yeah it could be done. its rough down here tho. idk if you could handle it

Rough you say? Rougher than baghdad or al anbar?:bat:

So whos truck is faster yours or kyles

we have never raced before. we dont have to because we have the two toughest trucks around here, so we leave it at that. it would be close tho. im making alot more power than he is. but nothing can shift faster than an auto. off the life hed kill me but after 30 hed be behind me and stay there

The two toughest trucks around there... until I come to town of course. We'll leave it at that :choochoo:

Thats a very bold statement

The kleins are very bold people! :lol88::gayflag:

what size are your twins

If your going to run over 60psi id recommend Orings plus studs.

o rings are in the near future

my 98 12valve has a schwiter turbo htb2, afe air manifold, isspro gauges, k&n cold air intake, 150 hp injectors, and its makes 45 pounds of boost is that too much boost:playing::playing:

Funny....
As many trips as I make up into Western NY to visit a close friend I have NEVER seen your truck anywhere with its chest puffed out waiting to get its azz knocked off the throne.Old man once told me,never write a check your azz can not cash and if you think you are the baddest then someone will come along and knock you off your little hill.

Lets see now,I can run from here to Buffalo in less than 5 hours.Weather is getting nice and you seem to have a check wiating to be cashed,maybe a road trip knocking you off the hill would work for my poor attitude today.

Dan..
74psi and you are living on borrowed time,its not a matter of how its when it will happen.

Back to the posters original question...
As Dave said,many factors will contribute to just what you can "get away" with for boost on a stock head and headgasket.The rule of thumb is generally no more than 16.5 degrees of timing and gate the stock charger to 40psi and you "may" get some longevity,but,do not count on it.Also note that ANY boost pressure ABOVE 40psi on a HX35/WH1C/HY35 does you absolutely zero good and all it does is superheat the air charge.

P.S.-Real Men Run Big Singles and don't run twins.:tu::rocking::yeah::choochoo::tttt:

wut

when i say "around here" i mean in a close area maby our county? few surrounding towns? ive been driving mine around for almost two years now and havent found truck around my area that moves like mine. except my brothers 7.3l

and why do real men run singles?
are they not good fabricators or what?

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and im pretty sure "around here" is nowhere near WV or NY. so im not the one running my mouth in this thread, "ANDY"

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right now a super 40 over a ht3b turbo.

but looking for more of an s300 based charger for up top

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andy i apologize, i thought your post was aiming towards me. but you were accually talking to 85 305. my bad. but me and 85 305 joke back and forth, him and my brother were buds on the powerstroke forum. he was joking around. sorry -dan

if the head lifts then you put to much boost to it :scare2:

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i have seen stock motors take 45 several times and even extended and didnt phase them

heres an example. idk if you believe me and i honestly dont care.haha. my buddy has a 12 valve conversion on his 05 ford f250. the motor has a cutted afc with no plate. super hx40 turbo pushing about 52 psi of boost max, and 24.5 degrees of timing. no studs no nothing. stock headgasket and stock head bolts. motor rocks and rolls. been running it like this for over a year no problems. i even gave him the speach that he cant run that timing and boost without studs and o rings. but he said it would be fine. and it is.

:tu: Damn right


Twins are cool ... but I a big fan of big ole single

thats a cummins for ya, you can put them through hell and the dont die:tu:

First...Spell Check,learn it and use it.
Second...You were making a comment about how bad you truck was by telling Dan he would be second if you came to town.I was mearley stating that I am in your area alot and it seems if it was then the local diesel heads would know you or see you,correct?.Guys who make big power and slay competition area always talked about around their respective towns.Thats all I was saying and the busting your stones flew right over your head.

Dan...
Since many of us know how poorly a 7.3L runs if your comparing yours to it and saying his moves out like yours then you need to go back to the tuning bench.A 7.3L should be nothing for a twinned 12v to worry about or for it even to get close to.

Has zero to do with fabrication.Anyone can make power with a twinned 12v but tuning is needed to make the same power with a big single.Then throw in how hard the big single hits when it lights,there is no comparison.

Yawn.....Missed your head also I see.

WHY???..
The combo you have with the proper pump work,injectors and tuning is good for up to and over 800hp if you have the wallet to seek the parts to do it.There is no need to waste anymore money on another charger,unless its burning a hole in your wallet.I have seen a 40/3B combo make well into the high 700's on fuel and the high 900's with a small shot of giggle gas on JetPilot's old Bottle Rocket before he sold it.

The song...."Living On Borrowed Time" should be hummed while reading that post.
Lets see here,high timing,no studs,no o-rings,stock headgasket and bolts, and driving a HX40 way past the 40psi map so he is also adding super heated air instead of a cool air charge.When that thing lets go its going to need more work than just a headgasket/o-ring job and I am guessing that he doesn't care about what the tops of his pistons look like since he prefers hot air.Can you say...DUMBAZZ!:argh:

i agree hammer. i told him many of times that he will blow it up.
im not a fan of powerstrokes, but this thing rips no lie.
and my truck would beat his. but the point ill make now is. all my brother has is a 400 dp tuner chip. and a 200$ valve body. the point im trying to make. is for only them two mods, it rocks and rolls hardcore. both my buddys have 12 valves with 2000$ built trannys, fuel plates, 4gsk, aftermarket turbo,valve springs. and his truck would waste them. cant mash the pedal without leave marks through 3rd gear. but i dont know why you wouldnt want twins? fast spool up, high boost on the top end? best of both worlds. and if i remember correctly, you told me to get a s300 based charger a while back.

Speaking of "mearley" spell checking my posts, I was toying with dan because I know him and kyle thru the boards. But let me know next time your in town. I'm always looking for lunch :lol: lol

Wait he has a 7.3?? I thought he had a 6.0? A 7.3 w/ any custom tuner isn't going to make more than 300-305hp to the crank w/ the stock turbo my friend. A plated 12v will WALK a 7.3. I would know; I had a 6spd 7.3

Wow...
Your pretty good,I wondered if you would find that mistake I left you.
Lunch eh.....:moon::moon::moon:
Question for you and afterwards we could break some bread......
How far would you go to win?.....
I have been known to leave parts scattered just for glory,are you prepared for that?.

Thank You!:tu::choochoo:

lol you guys are funny. and no my borther has a 7.3L not a 6.0 its a 99.
maby the motor dont make that much power. but atleast the ford tranny can lay all that power to the ground. and a dodge auto does is sit there and spill its guts and dont even move the truck. that is, unless you drop 3 grand into it. the ford autos are bullet proof.
infact i may even be trading my nv4500 for my buddys 5100 torqshift with a suncoast tripple disk convertor that is already compatible with a 12v no parts needed. i just dont have the time now.

dont get me wrong guys, im am loyal and love dodge and especially cummins.
but i love my bros rig

Parts scattered for glory? Thats as far as you'd go to win? Chit.. I go as far to remove 2 tires from my dually, my spare, and my metric tool set from the cab to get the edge on being the lightest!

Ford trannies aren't quite bulletproof.. anything more than a tuner intake and exhaust and that trans is going kablooey. Granted, it doesn't take 4-5g to rebuild one.. all you need is a valvebody and tc. But still. As much as a bull the 7.3 is, it's NOT made for power and would NOT touch a cummins thats been turned up

85 305
i dont know how much i would say. last i knew hammer was laying down almost 800 ponies on the dyno. (correct me if im wrong) and isnt a beginner with diesels.

Aww, I was hoping for pinks style drag race.

We're just messing around dan :lol: You and your brother kill me:tttt:

Me too :( I just KNOW deep down inside my heart that my fp/exh/intake 12v would kill him:bat:

haha