Turbo choice for stock LS? Critique me

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Old Feb 14, 2020 | 11:09 AM
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Default Turbo choice for stock LS? Critique me

Well looking for a max of 300-350whp. I know the 350whp isn't really this turbos area but I have an idea further into my idea below...

So the setup will be basically a stock B18B1 with the following bolt on parts:
  • 2.5" intercooler piping
  • Garrett 24" wide x 10.5" tall x 3" thick intercooler
  • Autoworks Miniram manifold
  • Autoworks 3" Vband downpipe with 44mm dump tube rerouted into downpipe
  • 3" exhaust to rear
  • 44mm Turbosmart wastegate
  • S300 Hondata
  • Grams 750s
  • Walbro fuel pump
Maybe a few other things I'm forgetting but this gives you an overall idea. The turbo I'm thinking of is the ATP .82AR GT28RS and this particular one. https://www.atpturbo.com/mm5/merchan...ode=GTGT2860RS

Now to reach the 350whp area maybe not that much but as close as possible. I was thinking of going with some 404 cams and a Skunk2 Pro intake. Oh and I'm strictly talking about 93 octane numbers, no E85 or race gas.

Mainly I'm just curious of the turbo suggestion. I think for a stock non built bottom end LS motor this might be my best option for the cost. If anyone has a better idea for $999 let me know!

Last edited by Stopsign32v; Feb 14, 2020 at 12:21 PM.
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Old Feb 14, 2020 | 11:35 AM
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Default Re: Turbo choice for stock LS? Critique me

Why no vtec


Not gonna hit 350.... 3071 could do that
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Old Feb 14, 2020 | 11:51 AM
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Default Re: Turbo choice for stock LS? Critique me

350 is do-able. My old LS-t setup made 379, with a cast iron manifold and smaller T3/T4 turbo (Rev Hard kit)….iron-sleeved block, Wiseco pistons, Eagle Rods. Ditch the 404 cams and Skunk2 manifold...
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Old Feb 14, 2020 | 12:20 PM
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Default Re: Turbo choice for stock LS? Critique me

Gt28 is not part of t3 family.... Gt28 is a great turbo just don't think it can quite get there.

If your budget is restricted journal bearings are quite a bit cheaper. I like the Gt28 setup tho just have realistic expectations
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Old Feb 14, 2020 | 12:24 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by 2kdrift
Gt28 is not part of t3 family.... Gt28 is a great turbo just don't think it can quite get there.

If your budget is restricted journal bearings are quite a bit cheaper. I like the Gt28 setup tho just have realistic expectations
I'd like to stick to BB for off throttle response. What got me curious on this setup is I was wondering how much more the .82 housing with true 3" exit paired with the 4" Anti-surge housing will push the regular GT28RS's power potential. It looks like it would be a killer street setup and maybe a middle turbo between the GT28RS and GT2871R.
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Old Feb 14, 2020 | 05:29 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by NVturbo
350 is do-able. My old LS-t setup made 379, with a cast iron manifold and smaller T3/T4 turbo (Rev Hard kit)….iron-sleeved block, Wiseco pistons, Eagle Rods. Ditch the 404 cams and Skunk2 manifold...
‘I loved the response of a good t3/t4 back when I had my LS CRX, that thing was fun! I ran around 13psi and it was nasty
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Old Feb 14, 2020 | 10:38 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Stopsign32v
I'd like to stick to BB for off throttle response. What got me curious on this setup is I was wondering how much more the .82 housing with true 3" exit paired with the 4" Anti-surge housing will push the regular GT28RS's power potential. It looks like it would be a killer street setup and maybe a middle turbo between the GT28RS and GT2871R.
I dont think much really, the .82r would move the map to the right a bit but compressor housing and 3" outlet wont change much in terms of power. even with the 2871 youd prolly just hit 350. honestly 300 is pretty damn good for the street may even be a pinch more fun then 350 both are good options

still dont know why you dont just throw a vtec head on it....unless your trying to be "different" for the price of cams you can have a better flowing head and a "2 stage" power band that wrecks the LS head even when ported
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Old Feb 15, 2020 | 12:10 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by 2kdrift
still dont know why you dont just throw a vtec head on it....unless your trying to be "different" for the price of cams you can have a better flowing head and a "2 stage" power band that wrecks the LS head even when ported
That's a good point. The only thing is even with the Vtec head I would be limited to 7k redline due to the LS rod bolts, though I'm sure it would still make more power everywhere to 7k. Vtec head with the GT28RS would probably be rowdy from a redlight.
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Old Feb 15, 2020 | 09:39 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Stopsign32v
That's a good point. The only thing is even with the Vtec head I would be limited to 7k redline due to the LS rod bolts, though I'm sure it would still make more power everywhere to 7k. Vtec head with the GT28RS would probably be rowdy from a redlight.
Actually, it won't. The LS head at 300-350 wheel HP makes more torque in the midrange than the VTEC head ever thought about... the VTEC head will gain ground above 7K, but you aren't going there, so stay with the non-VTEC head and send it.
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Old Feb 15, 2020 | 09:50 PM
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Default Re: Turbo choice for stock LS? Critique me

hmmm my dyno shows gains after 4k when vtec kicks but thats with vtec head never tried a LS. also after 7k power moreless flat lines on my gsr
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Old Feb 16, 2020 | 05:35 AM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by turboLScrx
‘I loved the response of a good t3/t4 back when I had my LS CRX, that thing was fun! I ran around 13psi and it was nasty
Those old skool turbos were pretty efficient for what it's worth. I was on 22psi and loved running against crotch rockets and domestic V8s. haha
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Old Feb 16, 2020 | 07:36 AM
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Default Re: Turbo choice for stock LS? Critique me

Would a .82 housing in a GT28RS make it's responsiveness more lazy over the traditional .63? If so I'm curious how much. Example, would a GT28RS with a .82 be about the same responsiveness as a GT2871R with .63?
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Old Feb 16, 2020 | 08:18 AM
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Default Re: Turbo choice for stock LS? Critique me

.82 A/R will make the turbo more laggy in the bottom while adding very little to the top end. I'd recommend going with the 2871 .63 over the 28RS with the .82

One of the smaller trim Garrett T3/T4 hybrids would also be good and within your price range.
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Old Feb 16, 2020 | 08:37 AM
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Default Re: Turbo choice for stock LS? Critique me

I was looking at this, pretty tempting...

GT2871R (compressor wheel trim 48 trim or 56 trim?)
.63 AR T31 Vband discharge
T04B housing for fast spool response

Might be my best option for a stock LS motor and 300-330whp.

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Old Feb 16, 2020 | 10:18 AM
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Default Re: Turbo choice for stock LS? Critique me

I’d read this thread here, https://honda-tech.com/forums/forced...etups-1323059/

you can make a super fun turbo ls without buying a super fancy turbo. It’s a stock Honda motor no need for 1500+ dollar turbo. My brothers stock turbo ls on a old peak boost ram horn kits and it’s awesome. I think he paid 1200 for the full turbo kit used.

Good luck
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Old Feb 16, 2020 | 10:33 AM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by b16racereg6
I’d read this thread here, https://honda-tech.com/forums/forced...etups-1323059/

you can make a super fun turbo ls without buying a super fancy turbo. It’s a stock Honda motor no need for 1500+ dollar turbo. My brothers stock turbo ls on a old peak boost ram horn kits and it’s awesome. I think he paid 1200 for the full turbo kit used.

Good luck
Yea I've been part of that thread before and currently at work I think I'm on page 990 something lol

I'm wanting to put decent parts on this car. Not really interested in a $1,600+ turbo as some people here tend to only suggest But I do want a entry level BB turbo.
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Old Feb 16, 2020 | 10:38 AM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Stopsign32v
Yea I've been part of that thread before and currently at work I think I'm on page 990 something lol

I'm wanting to put decent parts on this car. Not really interested in a $1,600+ turbo as some people here tend to only suggest But I do want a entry level BB turbo.
Entry level BB turbo is gonna set you back 1k+ minimum alone..
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Old Feb 16, 2020 | 11:07 AM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Txdragon
Entry level BB turbo is gonna set you back 1k+ minimum alone..
And that is exactly why I'm setting my max budget for the turbo and housings @ $1200
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Old Feb 16, 2020 | 11:22 AM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Stopsign32v
And that is exactly why I'm setting my max budget for the turbo and housings @ $1200
I'm curious as to where you're getting a BB 2871R and additional housings for 1200 bucks. THIS seems to be the place to shop. Lol
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Old Feb 16, 2020 | 12:03 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Txdragon
I'm curious as to where you're getting a BB 2871R and additional housings for 1200 bucks. THIS seems to be the place to shop. Lol
I'm referring to the turbo as a whole, ready to bolt on, not with extra spare housings.
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Old Feb 16, 2020 | 12:09 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Stopsign32v
I'm referring to the turbo as a whole, ready to bolt on, not with extra spare housings.
Ooohhh.. Yeah, still gonna be pushing that envelope. You know where you're ordering from yet?
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Old Feb 16, 2020 | 01:06 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Txdragon
Ooohhh.. Yeah, still gonna be pushing that envelope. You know where you're ordering from yet?
Depends on which turbo I go with. For whatever reason the GT series are all over the place price wise. Smaller ones are more expensive than larger ones, smaller ones are cheaper than bigger ones, the price seems to be all over the place. Himni racing seems to have the best price though.
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Old Feb 16, 2020 | 04:13 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Stopsign32v
Depends on which turbo I go with. For whatever reason the GT series are all over the place price wise. Smaller ones are more expensive than larger ones, smaller ones are cheaper than bigger ones, the price seems to be all over the place. Himni racing seems to have the best price though.
That's because Hinmi-Racing tend to swap out their wheels for theirs and keeps the CHRAs to try and stay legit.
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Old Feb 16, 2020 | 04:40 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by TheShodan
That's because Hinmi-Racing tend to swap out their wheels for theirs and keeps the CHRAs to try and stay legit.
Ah good to know. I'll probably stick with Autoworks anyways since he's doing the manifold/downpipe for me.
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Old Feb 16, 2020 | 04:45 PM
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Default Re: Turbo choice for stock LS? Critique me

Originally Posted by Stopsign32v
Ah good to know. I'll probably stick with Autoworks anyways since he's doing the manifold/downpipe for me.
Excellent choice! I got a pretty good combo deal on mine and I have no reason to think he wouldn't make another good one for anyone else!
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