rb25det with gt35r or sc61

[nisilvia]

Anyone put the gt35r or sc61 in the rb25det? Just trying to find a turbo and was wondering if these ones had a lot of lag. Also what brand did you get garrett or precision? I want to get a turbo with decent spool up time and be good for about 550 hp just in case of future upgrades.

[Mistaken]

I think most people say around 4000 to 4200 rpms for full boost on the 35R if im not mistaken. Just try searching i know quite a few people have em.

[silviasgp06]

there is a certain turbo that cost $200 max yields the same power levels as a 35r(if not more, and can be upgraded to 500+) and even spools faster(<3500-3800), all while being a journal bearing turbo off of a diesel truck motor. lol thats all im saying

the search function does wonders http://www.google.com/custom?d...hl=en

[Mistaken]

Holset HX35 FTW

[RustspecS13]

http://www.youtube.com/watch?v=XbwXfVFEMFI

Yea a GT35R works pretty well. Im going holset (Hx30) though on my rb20. If I had a RB25 Id get a HX35. Better spool, similar HP and cheaper.

~Alex

[nisilvia]

Do you guys honestly think the holset turbos are that good? I read a few posts about them but never really thought about getting one. I figured the gt30, gt35, and sc61 were around for so long and everyone that has one likes them but I guess I would look around for a holset and see how it works.

[l0nestar]

Do you guys honestly think the holset turbos are that good? I read a few posts about them but never really thought about getting one. I figured the gt30, gt35, and sc61 were around for so long and everyone that has one likes them but I guess I would look around for a holset and see how it works.

Nope! They are crap! Ask CJMartz2k about his experiences.

/sarcasm

They are awesome. On-par (and sometimes even better!) than Honeywell (Garret), but at 1/3 the price.

[lucky7]

i just got the 3076r. nothing to d!ck around with that way, just bolt it up.

[Cjmartz2k]

Holsets don't just bolt right up, and they have no aftermarket support because the are OEM appications only originally. Also, they are physically very large.

That being said, my HX40 with a 19cm housing makes 1.5 bar by less than 4k rpm in 4th gear on a stock RB25 with no VCT and 264 cams. I will also put an easy 50-60hp on a bigger GT35R. I can rebuild it for cheap. It's built like a tank. And o yeah, almost forgot, you can get them for a couple hundred bucks used like new on ebay HX35's are the same way except they are more on par with GT30's. There are DSM guys trapping 132mph trap speeds deep into the 11's with the bigger HX35.

I wouldn't trade my HX40 for GT35r if somebody offered to give it to me and install it for free. I'm not dogging GT series, they are good turbo's. I'm just saying don't take all the internet nutswinging at face value.

Borg-Warner is another great option, but they don't cost $200-$400 bucks.

RustspecS13--your the first person I've ever heard of using a HX30. You should measure the wheels and throw the specs up in a thread. I personally think it might be a bit small for you, but I like lots of power. Maybe you want instant repsonse. Got any pics?

[8gti9]

i was just talking to cummins and they said that there are different variations of the hx35 and hx30.

i'm weighing my options for turbos so when the time comes for an upgrade. maybe holsets turbo will be the best bang for the buck since the company i work for has a huge account with them and i could get holsets for super dirt cheap.

[Cjmartz2k]

Yeup, there are several different kinds. Holsets are weird like that. If you look up some of the other holset threads on here, I posted some info describing the different holsets, and some different types inside the different catagories.

I don't know of anybody that has messed with a HX30. I really think it would be pretty small, but like I said, I don't know anybody who has used one.

[nisilvia]

what kind of manifolds are you guys using? how about this one?http://cgi.ebay.com/ebaymotors...witem=too much?

[Cjmartz2k]

Yeah, that's an H1e compressor and I don't know what kind of exhaust. The H1e is the smaller, older version of the HX40. Skip it. Buy them used man. I haven't seen one that needs rebuilding yet, but it's only like $60 for a rebuild kit. I use a Stec manifold which is kick a** quality, but if you are doing this on a LHD silvia swap, I don't think it would work. The steering column would probably go right through where the wastegate runners are.

[nisilvia]

S which would you recommend the hx35 or hx40 for the rb25det? I was thinking about a 6boost manifold from australia.

[Cjmartz2k]

Depends on what you want to do with the car. Like I said, rough gauge HX35 = GT30r HX40 = GT35r

[nisilvia]

The turbos i saw on ebay say the hx40 is good for 800hp. Is that right? I wanted something good for 500-550hp with ok spool. How about you sell me yours?

[Cjmartz2k]

No way. HX40 is good for at most 700hp at the motor, and that's probably stretching it a bit. There are 6xx rwhp dyno sheets from the dsm guys with them, but I think those are very "friendly" dynos. I would expect somewhere in the ballpark of mid 500rwhp to MAYBE almost 600rwhp on a HX40 depending on how much boost you run. I'm in the neighborhood of mid 500rwhp at around 24 psi. That's just a but dyno though. HX35 would probably make mid to high 400rwhp at those kind of boost levels on a RB25.

I don't know if you are serious or not about buying mine, but I'm looking for an excuse to put this HX52 I have sitting here on my car. I would need a 100% certain "I'm going to buy it" from you though before I took it off to install the 52. You can email me if your serious. It's in my profile.

[RustspecS13]

I found on turbododge.com a guy said that the HX30 flows around 46lbs a min, and on another forum (I forget which exactly) that its good for about 300-350wHP w/o much of a problem.

So it looks like a GT25R that is capable of more power and better spool and higher pressure ratios. Now I just have to find one.

http://www.holset.co.uk/mainsi...0.php

On garrets actual site, they list the HX40 has flowing .53kg/s and being good for 350hp. The HX35 has .46kg/s and 280hp, and the HX30 .35kg/s and 240hp.

And following the general rule of almost double the HP on a gas engine, and you have approx ~600HP,~475HP,~400HP capable turbos.

Hmm I'll have to order some deutchwerks injectors soon and get nistune from a local place. And then get a hx30 and max it out on my buddys dyno.

~Alex

[sepulchralx]

I have a gt3582R 0.64AR.... talk about decent spool... It does have alot of top end with my stupid lovefab manifold. I think full boost is at 4K

[Cjmartz2k]

That's a little slower than what I spool at with a much smaller exhaust housing. What kind of hp numbers can you get out of that thing?