Bosshawg600

Alright I now am having my new engine worked on and Scheids told me my turbo is too big. They say it makes too much boost. I realy doubt that because they just want to sell me a stock hx35 for $1100. I laughed in their face and said I will pick the turbo cuz I am paying for it. I would like to get a new one cuz this one spools soooo late. It only makes 2lbs untill i get over 2200 then it lights up prety good. Thing is i would like to have some more bost at lower RPM's. I was thinking of buying a new exaust housing, like a 16 or 18 cm one, and then wastegating it at like 50 or so lbs. but I could go get a B-1 or a quick spool or something like that. My goal is to come out making 400+ hp anddd over the summer get it up to 500 and then who knows what. Any ideas, I would like to just put in a turbo and not worry about it for a while untill i upgrade to twins when I pay off the truck.

Oh ya and i will be adding studs and most likely some fire rings while they are into the engine. And it needs to be STREETABLE too

fordsux8269

Stick with the hx40 and put a 16cm housing on it and wastegate it off somewhere closer to the 40 ish psi range and I think you will love it.

Jetpilot

I would look into one of the 62mm hybrids..... Personally I like the SPS62 or the PS62. This is an awsome turbo with spoolup comperable to the HX35 but with a much wider MAP which means great egt control. This turbo supports 350-550 RWHP. Please feel free to give us a call if we can answer any questions.

Doug Smith

RowJ

I'm not a big fan of the HX-40. However, cost wise your present turbine housing is your problem, and the 16 cm housing would be a hugh improvement !

But the newer generation of turbos have advanced technology that is worth serious consideration. Just the last 2 yrs have seen better, lighter, stronger materials.... new compressor and turbine designs .... major bearing improvements .... better blade aerodynamics ....improved lubrication, etc.

The lattest and greatest turbos, like Doug mentions above, are well worth the money, IMO. Performance-wise, it's the way to go.

RJ

BigBlue

I agree, that 21cm housing is WAY to big. Throw a 16cm on there and I think that you'll be plesantly surprised. And since when was to much boost a bad thing? That's what studs and o-rings are for.

HOHN

C'mon BB, you could have saved me a post by not making statement like this that you KNOW are untrue

Of course you can have too much boost. Ask anyone who's grenaded a charger from overspinning it.

Then there are the cases of more HP at lower boost-- like RJ found when he first went to the external WG on his B-1.

jh

RowJ

Now BB's B-1

RJ

BigBlue

Ok, I figured that was a given. The way it was stated in the original post it sounded like to me that Scheids was saying it was pushing to much boost for the engine, not the turbo. Hence them saying the turbo was to big and making to much boost.

Bosshawg600

I have heard somewhere that the 40's dont like high boost as in the sometimes blow up. I think the high boost of the 40 auctually hurt my engine a bunch but that was because the injectors were horrible and didnt flow half as much as they should. I think with new 370's it would be fine. I just dont want to spend 1100 for a stock 35 when I can get a new housing and wastegate for less than 200. If I am going to spend 1100 I'll get a B-1 or one of the PDW turbos. I guess I will look around and see what I can dig up. Anything is better than a 35 when i will have to change it out later to get more power. I just want something taht spools fast but doesnt over boost at highway speends.

I have never driven a wastegated truck before. Would I have problems going down the road at 65 or 70 and the wastegate opening and loosing power? Last thing I want is to be passing a slow car and I pull out and gun it and I lose all my boost and have trouble passing.

getblown5.9

you dont lose all your boost. when the wastegate opens it lets some of the exhaust bypass the turbine to keep the turbo at a set boost without overspinning it.

i am wastgated at 47psi and i pull hard right to 117 when the speed limiter tells me no more

you wont even notice the wastegate opening...you will be building boost and then when it gets to the desired pressure it will stay there and not go any higher, but also wont go down either

HOHN

$1100 for a stock 35?? RUN AWAY AS FAST AS YOU CAN! You should find this turbo for $500 easily or less.

HX40s aren't safe above 38psi or so, as the shaft is just too weak to handle the stress of the HX40's turbine trying to deliver enough shaft power to make the compressor side make a lot of boost.

A gentleman local to me in Cheyenne popped TWO Piers-modified 40s before swearing off Holset and going to a BW-based turbo (B1 in his case).

I'm not convinced a Super 40 would be any/much more reliable. They tout the zero-balancing, but the problem imo isn't balance as much as shaft to wheel size. The 35s and 40s use the same shaft, but the 40 has a lot bigger wheels, which exponential increases the stress on the shaft as a larger wheel tries to deliver more power to a larger compressor that needs more power while BOTH have more inertia. Bad all around. The shaft is weak where the turbine wheel attaches, and the common failure mode is shaft breakage there, and then the pinwheel gets spit into the downpipe.

At least that's all what I've heard and been told. I still run the stock turbo, so I can't speak from experience.

jh

cowboys toys

I have a b2 on my truck (we think) but i am not running a wastegate.

NMCTD

Call these guys www.forcedinductions.com talk to Jason or Jose, they are great guys and have some good prices on custom S300G hybrids, the one he recommended for me is a 62mm and said to spool slightly faster than a stock HX35, and Jason has had one on his truck to somewhere around 500hp.

Laters...Josh

TxDiesel007

Strange

i thought that they would only make good bottom turbos on a set of twins, how much boost can u see with ur B2 or S400?

Rick

Bosshawg600

I was riding with him and we peged the guage at 60 and it was still rising so my guess is around 70+. Prety crazy it is like mine in that it doesnt build boost until about 2200 rpm then its a kick in the pants.