Log style header vs tubular header test results
 

I happened across this video this morning regarding testing a log style turbo manifold vs tubular header turbo manifold and was quite surprised at the results. The log style beat the tubular header handily! Log manifold made boost quicker and more of it

Tubular header: 603 hp and 560 lb/ft
Log manifold: 710 hp and 668 lb/ft

Test done by Richard Holdener on a 5.3 LS
https://youtu.be/dhK-lWFW7Jk?si=pAPcfULckULK1t2Y

I had the same results with my motor. It really improved the spool time .. So being it spools quicker i see more torque at the lower rmps ..

I just ordered 2 of those turbos .

I was meaning to visit his website to check them out. I had no idea they would be so affordable. Curious, are you going to run them in a twin configuration or are they for 4 cylinder projects? If these are sized right for twins they are a great deal!

https://richardholdenerperformance.c...ournal-bearing

No, I have a twin turbo car with GT45's on it. I couldn't stop thinking about how fast it would spool being he said that the gt45 spool slow compared to these. My car now spools fast so this is going to be really interesting to see what these do.

These are cheap compared to the $2600.00 precision turbo on the 4 cylinder. They are more than the gt45s I bought though. I didn't buy from him because he's just getting into selling them and figured it would take longer for him to get them shipped. He even said on his podcast that he's not fully going yet with selling them ..

Yeah, I just looked at the link you sent. Mine will be here next week. His site says late April... Not that it's a big deal but it was 10 bucks cheaper where I got them ..

Can I ask where you got them? I’m looking for a larger single around 88mm and I’d like to see what they offer. I think a single would be easier to package for me. I’m only wanting to make between 900-1100 hp. To package twins I’d have to move some of my hydroboost and catch can lines. Not terribly hard but you run out of room quick when you are trying to cram an intercooler, cold and hot pipes in the engine bay.

Do you have any pictures of your twins setup? I don’t think I’ve ever seen any posted.

Yes, I got them on eBay . https://www.ebay.com/itm/265755232392 Hopefully this link works.

You should get the gt42 like Richard tested. He said it's good for 1200hp.

No ive never posted it here . Ill see if i can get some to load up here of my twin setup

Here's 2 that I found ..

Just watched the test between the 800+ HP GTX3584 and the 1200-HP G42-1200. I’m definitely looking into the G42. I do have concerns that the G42 may have too much back pressure with my combo though. It will probably end up in the 461” - 466” range. I’m current at a 4.285” bore but will be reducing the stroke from 4.21” to 4”. It ain’t no little 5.3 LS :pound:

https://youtu.be/FDij2zpr3jo?si=_Mx8XENCoqNdHuQK

imo, you said you're looking to get into the 900-1100hp rang. That turbo should work. If you want over 1100hp then you probably should find something with a bigger turbine wheel. I've talked to Richard on the phone in the past. He's a cool guy. Try messaging him and ask him what he thinks about your concerns with your motor being too big. I think I remember him saying that the gt42 would be perfect for a 454 big block. I know that your motor is bigger, and I can see why you're concerned. If you're just going use your car for street driving with this turbo 900 is a lot of steam imo and I bet with this turbo it would be a light switch lol. I'm going to check out this video. Thanks for sharing it..

When i first put together my turbo setup, a told a friend I wanted to try a half turbo setup, one side n/a header and one side to feed the turbo. He swore it couldn't be done but I argued it could. I'll have to send him this video.

That was a pretty cool video, But I wonder with only one side taking all of the backpressure if it could eventually hurt the motor down the road..

Have you had a chance to swap out the turbos? Any feedback?

yes, I got them both on.

The spool time is cut at least in half.

The power seems the same on top, but it comes on sooner with less throttle which is exactly what I was going for. I'm 100% happy and glad that I did the change. So glad I saw Richard's video. I haven't turned it up yet, I'm expecting nothing less than more improvement.

How's yours coming alone?

I wanted to wait for your feedback on those turbos before making my decision. I think they will be a great fit for my combo and easier to package. I'm going to look around to see if I can find a mirror set.

I'm hoping to dig into the hot side fabrication in the next few weeks (I coach youth sports and All Stars is taking up my free time at the moment). I have a set of the 2.5" log manifolds from Stainless Headers. I'm running power steering (Hydro-boost) and used a custom remote tank set-up to give adequate room for the driver side manifold (hopefully lol).

Oh, ok cool, Yeah, the 2.5 will work very well. LMK how you make out. I look forward in seeing what you come up with.

Check put these turbos...

https://www.ebay.com/itm/13501091034...9ef6d69000d5a2

Fitting these turbos was very easy. It was much easier to fit them compared to the GT45s I had in there. I was surprised how small there are.

I really appreciate the recommendation! That’s a great price for twin ball bearing turbos. I’m 99.9% sure I’m going with those. I’m going to reach out and see if they offer them in a V-Band instead of a T4 without the cost doubling.

No problem, just double check on what you're getting before you buy.

LMK how you make out ..

What do you think about these? Same vendor. I noticed in the description that it has a flank milled wheel vs point milled. Not sure how big of a deal that is? I sent the vendor a message asking if they have them in a mirrored configuration

https://ebay.us/m/yRBhgc

I assume the turbine housing would be too large with these?

A mirrored GTX3584RS billet point milled twins configuration with 1.01 V-band

https://ebay.us/m/wlI3qu

It could give a better finish surface, but I wouldn't think that it would be anything that would be noticeable performance wise imo.

What's making you look at these over what I sent you?

The 101 would spool slower. I don't know how much slower. But I'm sure it would be ok. You would have more potential top end hoof. Either one will be a lot of power. I personally would stick with the smaller A/R.

Only looking at these for the simplicity of a v-band vs a T4 mount. If I can get the guy to package the turbos you suggested with a v-band exhaust housing, I’m buying them. If he can’t I’ll probably just buy the T4 version.

Oh, I see. I wasn't following what you meant. Yeah, having the v-band there gives you a lot of universal options .. I've never had one set up like that before. Would be a lot easier to take it off and on that's for sure .. Hopefully he can get you that option ..

Is that both turbos for the 999 price ?

I think it is. I messaged the seller but haven't gotten a response yet...

The seller said yes its 2 turbos for that price

Did you pull the trigger yet?

I was actually just about to. Are you trying to stop me or encourage me? :pound:

While looking I just saw these GTX3582rs turbos. From what I can tell they are very similar to the GTX3584rs but are a little bit smaller and have a 10 blade turbine instead of a 9 blade. Not sure what you think of the different turbine? Probably splitting hairs at this point since they are pretty close in size.

Opinion?

https://ebay.us/m/hsW0Dy

From what I've read these compressor wheels are quite a bit larger than a normal gen 1 3582.

-Fit Vehicle: Universal turbo for performance use, racing car etc.
-Fit engine displacement 4-10L Up to 1700HP

GEN2 Point Milled Compressor Wheel with 65.7mm Inducer 82.6mm Exducer
GEN2 Anti-Surged Compressor Cover with 0.72A/R, 4" Inlet and 2.5" Outlet
Ceramic Dual Ball Bearing System Turbo
GEN2 10 Blades Turbine Wheel with 62.3mm Inducer 68mm Exducer
Turbine Housing: A/R 0.83, Dual Vband, 1.01 is also available.

I may just go with the GTX3584RS's so I have some room to grow... this is a harder decision than I thought it would be. I don't want to make a mistake :3gears:

I'm just checking in, lol

The 84 turbine will make more power

Take your time, there's no rush. I would contact the seller just to make sure on what you are actually getting ....

Stainless headers is having 20% off from now though Black Friday if anyone was thinking of purchasing headers.

https://www.stainlessheaders.com/i-3...tegory:1390481

im finally mocking my car up. I did go with the 3'' upgrade, however, with atleast an IA2, the casting lugs need to be ground down to allow the manifold to bolt to the head on each side. Ill probably start a build thread in the next few weeks, now that the turbo is here and the car is on the lift.

what turbo did you get?

92/103 1.58 ar vsr should get it to the chassis cert

nice, good luck with your build. Ill look for your build thread to follow along.

How are the turbos holding up? Any results yet?

Zero issues, there holding up great. If I can figure out how to upload a video, I'll show you how fast they spool on the trans break at 5psi ...

How about you, any progress?

I tried uploading the video with no luck. It tells me it's an invalid file ...

PY doesn't support video.
You would need to use youtube or upload it on a website to have a link it downloaded it.


:confused:

That's great news! I've been busy with home projects and coaching, but I plan on jumping back into the turbo stuff again in the new year. I tend to overthink things ;) I have a new lower profile intake elbow on the way from Wilson's that will help with hood clearance. I want to run a factory steel hood instead of my fiberglass unit. With the way I want to package the system I think the GTX3584RS's will be my best bet. I want to retain my full 3" dual exhaust.

Wilson's elbow https://www.wilsonmanifolds.com/coll...acing-95-105mm

I've decided on the dual v-band 0.83AR units. They will make fabrication and fine tuning/tweaking the fitment easier. My plan is the package them similar to this with the downpipes running underneath/next to the crossmemeber tying in with my 3" exhaust

I'd really like to see the video if you could send it to me. Maybe via text or email?

https://www.ebay.com/itm/18650217493...Bk9SR8ictbjrZg

Oh ok. Thank you, John.

Sounds good.

I thought that you already bought the turbos months ago..

Here's my cell number 631 294 9095 . if you still want it . Here's my email too if you want = [email protected]