Turbo/hp question

[Ptothej]

In my signature, where would you guys say im at in the hp/tq numbers? And also... baby h1c w/16cm housing at 30psi.. is it past its efficiency? S300 turbo upgrade? I see alot of you guys rambling on about alot of different turbos.. s300 seems to be the one, what are the wheel sizes on the h1c and s300? I might throw injectors at it to save my pump.. unless my maxed pump is ok maxed out?

[diesel freak01]

big question is going to be is it the junk 518 or a rag? if its a rag i would guess maybe 250hp?

[Ptothej]

ya its rag sorry.. im gonna add that to my sig.

[Richie O]

Just do your homework on the S300 turbo's. The S300G or 174430 or BD super B ( all the same ) is a 57mm extended tip compressor. They say its good for 450 horses. BOG WATER is what I say to that. I'm pulling 297 out of my 89 and the pryo is pretty hot at that level ( 1400 plus with advanced timing ). Don't get me wrong, its a great turbo, runs well, drives great ect but in my opinion does not cool well over 300 horses. You might want to look into a 62/65/14. I'm also tempted to try a Super HX 40 holset on my 93 which has the GDS 60 mm and a 16cm. That turbo then would be handed down to my 92 with the 21 H1C.

[Ptothej]

BOG? Thanks for the input, I hope Im not asking stupid questions.. and alway in the back of my head.. how much past 30psi till I need headstuds and all that jazz? I thought I read 30psi somewhere on here but I havent heard any of you speaking about head studs and that sort of reinforcement when you start modding for a very long time...

[oldestof11]

If you get new head bolts, and torque them down to 125ft lbs, and keep them torqued, I do not see 50psi being too much of a problem.

All other wimps, anything north of 38 psi would get me itchy.

[Richie O]

BOG?

BOG
area of marshy ground: an area of wet marshy ground, largely consisting of accumulated decomposing plant material. It supports vegetation such as cranberries and moss and may ultimately turn into peat.




How much boost is a good question. It has to do with what timing your running, what condition the head and block is in, what the torque is on the bolts, ect. My 89 see's 32 to 34 psi with 3/16's advanced timing, and my 93 see's 45 psi at stock timing. I have never even retorqued my bolts. I know its just a matter of time before they pop.

[lazyjoe]

If you get new head bolts, and torque them down to 125ft lbs,

I have never even retorqued my bolts.

What would you retorque stock bolts at?

[Ptothej]

So you say the s300/super b doesnt do much better then my baby h1c? 125lbs.. hmmm I wonder if the older bolts would hold up to 125lbs? My timing is stock as far as I know, this truck hadnt been tampered with till I got it. I would say although it has 840 thousand recorded km's, (odometer works less then 50% of the time), it has been babied and never seen any hp gains. Im the second owner, the original owner claims factory clutch still, which I believe cause theres lots of factory parts that Im slowly replacing as they die, but with all of that said I would say although high km's it is in good shape.. just leaks oil from everywhere hahah. Howabout my VE? Its maxed with small IC injectors.. I dont drive the bag off this thing but somtimes to pass and whatnot I put my foot into it.. am I gonna kill that pump? Should I put slightly larger injectors in to relive the stress on the pump? Thanks for all of your answers I really appreciate it, Ive learned alot from this site!

[Richie O]

What would you retorque stock bolts at?

I hear 125 is a good place,,,,, but also hear people breaking or stripping bolts and threads trying to do that.

[Richie O]

So you say the s300/super b doesnt do much better then my baby h1c?

You don't have a baby H1C. The baby was on the non cooled trucks from 89 to 91.4. The 300G is lots better then a H1C. Just may not be the answer if your looking for lots of power. They are a great mid range turbo. Good manners, and a strong design. It is hard on a pump running it at above normal range. Bigger injectors will help some as far as less strain on stuff, but your still asking it to pump more. Don't go huge on injectors if you have no plans to get crazy. A nice 5x.014 ( aka 435 ) thats set up to run clean will make more power then most people will ever make. Make sure you do your homework if you don't like haze under easy running conditions. Ask questions and tell the supplier what you want out of the injectors. If they have little or no info and no feedback, look elsewhere.

[IowaCummins]

I retorqued in stages, like did all at 115 then 120 then 125 well all held that except 2 that got soft around I think 123 those were up front pass side. That held 6 months of 35psi and a year of 40-44psi at 1/8" past stock timing. Headgasket started to seap where those bolts went soft but that was also a year and a half later. all that was a max of 1350degrees

[Ptothej]

Ohhhh ok, baby h1c is non intercooled, normal h1c is intercooled gotcha! Great! Thanks for your patience! Im getting there hahah. For me, I suppose Im happy with where it is, but just would like it to be a bit more reliable (no pump failure)/possibly more efficient, I like the smoke factor but also wouldnt mind running cleaner if there was a turbo to do that.. another thing running thru my head is I hear alot of people running powerjoke intercoolers and/or opening up the intercooler piping/intake? What year of power joke? And perhaps thats all I need instead of a new turbo? I know some people are running ths GDS? 60mm upgrade.. maybe thats more up my alley instead of a new turbo since Im moreless fine tuning at this moment?

[Richie O]

First you need to decide final power and use of the truck. If you want 300 horses, but not to tow with it then a 60 gds will do that. Tow with it, . Ask me how I know. If you get to a power you want, and find yourself wanting that power for longer then 15 seconds at a time, then you need to look into better air intake/filter, better intake tubes, better intercooler, 4 inch exhaust, and better turbo. I have a powerstroke in the 89 with the s300g 4 inch stans exhaust, updated cooler style tubes. Still have egt issues, but truck goes real nice and it does not get as hot and is slower to raise egt's then the 93 with same power but less of those mods.

[1STGENFARMBOY]

Richie do you think your monster injectors are causing your high EGT's, cause with my
set up ( and my sig is up to date ) my truck will hold 1250* for how ever long i want to,

I have never dynoed but it gets pretty roudy with full throttle, ran a couple of 6.7 CR's
that were probly stock and took them handilly.


Darwin