My son is building his LS turbo. The engine has been rebuilt to accept a turbo.
We want to put together our own system and am wondering what type of turbo
to buy that will net us at least an additional 100 hp. Would appreciate your
ideas. Thanks.

 

It really depends on the turbo kit you run. Not all systems have the same efficiency output.

If you are looking for a simple joe-schmoe answer... then a t3/t04e 60-1 style would work just fine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrecisionH23a &raquo;</TD></TR><TR><TD CLASS="quote">It really depends on the turbo kit you run. Not all systems have the same efficiency output.

If you are looking for a simple joe-schmoe answer... then a t3/t04e 60-1 style would work just fine.</TD></TR></TABLE>
a 60-1 on an ls?

i'd need more info on the setup to agree with that. is the motor BUILT or rebuilt?
if you're only looking for a 100hp gain, i'd say get a t3/t04e 56 trim..or something along those lines. 240whp is EASILY obtainable with a turbo like that and provides an excellent power band

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CivicVX94 &raquo;</TD></TR><TR><TD CLASS="quote">
a 60-1 on an ls?

i'd need more info on the setup to agree with that. is the motor BUILT or rebuilt?
if you're only looking for a 100hp gain, i'd say get a t3/t04e 56 trim..or something along those lines. 240whp is EASILY obtainable with a turbo like that and provides an excellent power band</TD></TR></TABLE>

He did not give specifics, he simply said he wants at least a 100whp gain on a built motor. So I assumed he wants around 400whp.

So as I said, that was a joe-schmoe answer since he didn't give hardly any details or goals about his build.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrecisionH23a &raquo;</TD></TR><TR><TD CLASS="quote">

He did not give specifics, he simply said he wants at least a 100whp gain on a built motor. So I assumed he wants around 400whp.

So as I said, that was a joe-schmoe answer since he didn't give hardly any details or goals about his build.</TD></TR></TABLE>
ya i know but he said the motor is "rebuilt to accept a turbo" so it's hard to know if he means it's BUILT or just rebuilt....a 60-1 on a rebuilt ls isn't such a good choice...now if it's built and has a higher redline, then ..ya... he might make some good peak numbers, but not so hot of a powerband....and when he said he wanted a 100hp gain, i took it as 100hp over a stock ls motor which nearly any decently sized t3/t04 could give him.
i'm not tyring to start ****, just differences in opinion and we both got different thinkgs out of his post
o ya and a t3 60 trim or super 60 would be a different story....i just don't know about a t3/t4 60-1 on an ls

 

LS turbo. Thanks for the information. The engine has a stock valve train, but the engine
bottom end was redone.
micro polished crank
.20 overbore
low compression forged pistons and rings
arp head bolts
new oil pump. water pump, cam belt etc.
intake, header

I would like to get around 300 hp at the wheels and would like to build the set-up
versus a kit. My son and I are going to put
together the kit slowly and then have it
installed. We're thinking a hondata s300 for
ECU.
I hope this information helps.

 

t3/t04e 50 trim/ .48ar t3 will do just fine and give you a nice powerband for 300whp.

 

First off nice avatar...

Will 300hp be the max your son will want? If not you might want a turbo that will grow with his needs. Also if the block has not been assembled yet I would throw in some forged rods to so that the engine will last a bit longer and be able to take some more power later. Lemme see if I can do this and not sound like a complete idiot (as I often do).

-Pricey, but good

Good low/mid range
gt28rs ~340hp
gt2871 ~400hp

Good mid/high range
gt3076 ~500hp

-Less expensive

Good low/mid range
holset hx30 ~350hp
t3/t04 50trim .48 a/r ~400hp

Good mid/high range
holset hx35 ~550hp
t3to4e 57trim .63a/r ~420hp+
holset hy35 ~500hp

There is a bit of conjecture regarding the application of the 57 trim vs. the 50 trim, but I think they would both be very good turbos for your app. Also any of the others I put up there would be fine. I only listed certain turbos cause it doesn't seem like you are trying to go overboard. I personally have an hy35 on my gsr. Here is a look at my powerband if you are interested. https://honda-tech.com/zerothre...ge=56

GL. I hope that we helped a little.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrecisionH23a &raquo;</TD></TR><TR><TD CLASS="quote">t3/t04e 50 trim/ .48ar t3 will do just fine and give you a nice powerband for 300whp.</TD></TR></TABLE>
ya i'd agree with that

also to the op, you may want to upgrade your valve train. the stock ls valve train is a real limiting factor in how high it can rev, which isn't high. you don't want to spend all that money on a built block and float a valve and mess it up...
i'd recommend some dual valve springs and titanium retainers at the least.
also, if you're still in the process of assembly, you may want to consider porting the head to let it flow a little better b/c stock ls head's don't flow so well. i have a worked head with a ~mild pnp, deshrouded valves, and polished combustion chambers that i have no use for. pm if your interested

 

also don't forget the gt3071r as it would give decent spool and the potential to get you into the 400-450 range on race gas

if 300-350 would be the absolute max whp you would want i would definately go with the gt28rs, an absolutely the best turbo possible for that power range

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CivicVX94 &raquo;</TD></TR><TR><TD CLASS="quote">
ya i'd agree with that

also to the op, you may want to upgrade your valve train. the stock ls valve train is a real limiting factor in how high it can rev, which isn't high. you don't want to spend all that money on a built block and float a valve and mess it up...
i'd recommend some dual valve springs and titanium retainers at the least.
also, if you're still in the process of assembly, you may want to consider porting the head to let it flow a little better b/c stock ls head's don't flow so well. i have a worked head with a ~mild pnp, deshrouded valves, and polished combustion chambers that i have no use for. pm if your interested </TD></TR></TABLE>

Depending on the price, he might be better off just going lsv. We all know the vtec heads flow much better (on average) than their non-vtec counterparts with no headwork.