Called City Diesel and they get $685 for their Dodgezilla if I dont buy a new exhaust housing, I have a 12cm2. I am looking at a used S300G that appears to be a standard non turbo shop non modified S300G, part number is 174430, model number S300G071. Anyone know what the specs on the S300G are? City Diesel says that their Dodgezilla has a 62mm compressor wheel and will support well over 400 hp but would spool better if I bought a 14cm2 wastegated housing, but they want like $410 dollars or something just for the housing. How do these two items compare? Thanks.

 

A bigger exhaust housing isn't gonna help spool up any, it would actually make it worse. The only thing it'll help with is to lower egt's once you have it wound up good.

 

Ok, Im on board with the exhaust housing dynamics but what I am more concerned about is what size compressor the S300G has with the PN and MN I gave vs City Diesel saying their 35/40 has a 62mm compressor. I have not read anywhere, and that really means nothing, that says a 40 had anything bigger than a 60mm comp wheel. How do the two turbos (the dodgezilla and S300G) compare to each other?

 

this is from googleing part#174430 came up with a post from TDR:

I think it all depends on which S300 you go with. there are at least 4 different versions of the 300g from schwitzer, 2 different turbines as well as 2 different comp wheels. The largest being a 61mm 49 trim wheel.
I think most of the cheaper ones are 57mm or so on the inducer.

If I remember right, they flow like 62 lbs/min or so. That could be off though, just going of memory when I was looking into one.

174430, this part number is the same basic turbo as BD's super B. It has the "extended tip comp wheel".

 

That is how it is listed "The same turbo that BD sells" although it was not purchased from BD. I did a Google search but did not come up with that. Is the BD turbo the 57 or the 61? Does the model number S300G071 mean anything? Thanks for the info.

 

Why dont you crank up some more fuel and stick a S400 under your 35??

 

Sorry I put in Schwitzer 174430.
That comment came from the TDR, from the search.

 

Its more cost effective right now to get a better single and save for a good set of twins when I have the cash. So any definitive numbers on the PN and MN given? I hope it is the 57 as I have read that towing with a 62 is not that much fun.

 

Also, type in Borg Warner 174430 in a search engine.

 

I tow with my 62. Its the 64 that has surging problems when towing. I pull a light load around the country its only #9000. Plus #1000 of junk in the bed.

 

Here, call or email this place. Dallas turbo ask for Dave if you call. He will give you all the info you need with that part# you have. They are great people to work with. I just bought an S400 for my twins for $585 from them.
800-297-3626
or
turbomike39@netzero.com

 

TXWelder, If that s 300 you're looking at is on ebay, I asked that seller a question about the turbo. His response was that he hated the spoolup, it was a "lag monster" and didn't light till 2500 rpm on his rig. He said he could only make 28 psi boost with it, so maybe the wastegate needs to be adjusted. He said that he called HTT and gave them that part number and they told him that it was not the same as a Super B. I was shocked that he was so honest with me when his listing states "same turbo that BD sells.."

He said he was running 75 HP sticks on his 98-2002 truck with a TST set on nine. He said this turbo with TST on 9 spooled about the same as stock turbo with TST on 6.

A true Super B has a 57.5 mm extended tip compressor wheel.

Side note, this seller also told me that HTT makes BD's turbos. So take it for what it's worth, I would be careful and do your homework. He said he bought the turbo from a local shop and didn't install till 6 mos or so after he bought it new so it was past the complaint/ refund time. The turbo works fine he said, it just didn't work for him. He said that he ended up buying a 62 13 Stainless from HTT.

Anyway, I was definitely turned off to this turbo after his comments, sounds to me like it doesn't spool right, 2500 rpm is more like a big ole 66 mm not a 57.

 

I ran a Dodgezilla as a single, but have never ran a S300 hybrid of any type.

With my DZ I could easily push it past the surge line in the 16-20 psi range if my rpm was too low. My truck turns 1600 at 60 mph (285's), so that put allot of "normal driving" exactly in the wrong spot for this turbo. That bad spot was just about every time I got half way on the throttle. It would make a really annoying chi-chi-chi noise with a little barking and snorting thown in until the boost got over about 22 psi. It was really prone to barking in my truck at all but the mildest throttle lifts when shifting gears 3-4 or 4-5 even for so called "normal driving".

My DZ has a 8 blade 62mm compressor wheel, I guess the typical is 6 blade. I am not sure the difference. It has a 14cm WG turbine housing. Before with the HX35 I could push into the 1600F EGT's and with the DZ it only dropped to around around 1400F. Realistically, with any kind of load, I could not keep EGT below 1300F in 5th gear unless I was flying at well over the radar. In 4th gear it performed well though, its just that cruising at higher rpm's all the time got really annoying for me.

My advice is don't waste your $$$ for either one of them, probably not enough improvement to justify the expense. Instead save up and look at a better suited s300 hybrid. There are allot of good choices out there now. Or maybe, for close to the same $$$, you could buy a HX35 over s400 twin kit. Then add fuel to make about 500 Hp and smile from that day forward with little concerns about EGT.

Now that I typed all of that, some people I have read about use the DZ and love them dearly. It just has to be installed in the correct set-up. For them, a 14cm WG turbine housing performs really well up to the upper 300 Hp range. Keep in mind the stock HX35 performs well into the lower 300 Hp range. So that is the level of improvement.

FWIW this is the same DZ I am running in my twin set and I love its performance in that application.

Good Luck;
Jim

 

I asked him about what truck he had it on and he gave me the same information but did not tell me it was very laggy. I will do more research on the part and model number and give Dallas Turbo a call and see what I can find out for sure. Thanks for all the help.

 

I'm so close to buying a DZ and then I read this. My plans are to run this in a twins setup so I guess thats a good thing. I don't get how I'm making 368 uncorrected HP(408 corrected) at altitude on a little ole HY. But it's been backed up a coupla times now. I'm actually gonna run this thing on a 12cm2 housing as I tow a lot and can't afford the spool up loss. I'm hoping this thing cools decent enough to buy me a little room. There is a guy in town making 500 or so in a 12 valve with a 14cm2 housing and a DZ. I guess well find out in the coming months.