How to determine best turbo for my hp goals
 

Quick question guys,

I currently have a '99 gsr with the xs engineering turbo kit installed on it. I started with this kit because it used the garret gt28rs turbo which spools fast as shit, but now i believe this turbo is too small for my new hp goals. https://honda-tech.com/forums/images/smilies/emsad.gif I am planning on selling the turbo and mani and upgrading to something more appropriate for more power. If i would like to make in the range of 350-400 hp, what turbo should i use to achieve the fastest spool and best streetable powerband. Since i am already running rc 750 injectors, a walbro 255lph, and hondata s200b w/ boost... 3 step... and datalogging i assume my fuel system will be fine. i just want to upgrade my mani to the full-race (with ac) and a turbo that could make that kinda power. Any suggestions would really be apreciated.

Re: How to determine best turbo for my hp goals (4rc-fed)
 

The Garret Gt3071 would be a wise choice... Are you running the stock internals??

Re: How to determine best turbo for my hp goals (jdmvtec28)
 

damn you have the gt28r turbo.

more info on your setup and any dyno?
i'd love to see the powerband on a stock gsr.

what psi?
how was the spool time on that bad boy.

sorry i love small turbos.
hehe

I made 380 on a GT28RS. I now make 400+ on a GT3071R, but it spools significantly slower.

What's your CR? How much boost are you running?

Re: (rmcdaniels)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rmcdaniels &raquo;</TD></TR><TR><TD CLASS="quote">I made 380 on a GT28RS. I now make 400+ on a GT3071R, but it spools significantly slower.

What's your CR? How much boost are you running? </TD></TR></TABLE>


what was your setup as well?
It's been a long time since i last looked up info on that gt28rs... is that the same as the gt28?

Re: (Charlie Moua)
 

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


what was your setup as well?
It's been a long time since i last looked up info on that gt28rs... is that the same as the gt28?</TD></TR></TABLE>

Sleeved B16, 20 PSI of boost (falling to 17 at 8500 RPM) on 8.4:1 CR pistons, Lovefab SST manifold, 3" DP and exhaust, 65mm TB , AEBS intake mani, AEM EMS, tuned by JDogg.

GT28RS is ball bearing and rated for 350 HP, which I believe is a bit more than a GT28

Re: (rmcdaniels)
 

As of right now my internals are all stock because im only running it at 7 psi. When i change setups i plan on sending the block of to be sleeved and cleaned. Im going to do things right when i get rollin on the new setup, so i plan on building the entire motor both top and bottom end. Is the GT3071R pretty much the next step up from the GT28RS? If you think i could make 380 with my GT28RS then i guess i will just stick with it. The last thing i want to do is upgrade to a larger turbo if all it means for me is more lag.

Also, how can i stand to benifit from a larger TB and intake mani? Are they both pretty much required for higher hp setups or are they simply gonna help me make more power like an exhaust. Thanks for all the advice guys, i appreciate it.

Re: (rmcdaniels)
 

Also, which GT3071R are you running.... .63 A/R or .82 A/R?

Re: (4rc-fed)
 

hey man dont bother with the TB and intake mani your money is better spent elsewhere in my opinion..you will see very little gains for what they cost

i just pmed you i just noticed you are a trial user i dont know if you will get it or not...if you have aim add me... chris dornon13

Re: (4rc-fed)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4rc-fed &raquo;</TD></TR><TR><TD CLASS="quote">Also, which GT3071R are you running.... .63 A/R or .82 A/R?</TD></TR></TABLE>

I have both, currently running the .82 housing. I didn't notice much difference in the spool between the two housings.

Re: (4rc-fed)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4rc-fed &raquo;</TD></TR><TR><TD CLASS="quote">Also, how can i stand to benifit from a larger TB and intake mani? Are they both pretty much required for higher hp setups or are they simply gonna help me make more power like an exhaust. Thanks for all the advice guys, i appreciate it. </TD></TR></TABLE>

The stock B16 intake mani has some very restrictive runners. The AEBS is a nice cheap upgrade for it, but I don't know how much difference it makes. The TB was an afterthought, you don't really need it, but as long as I gad a 65mm manifold opening, I figured it wouldn't hurt to have a 65mm TB.

I also have a RLZ stage 2 ported head with Ferrea valves/springs

Re: (rmcdaniels)
 

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

The stock B16 intake mani has some very restrictive runners. The AEBS is a nice cheap upgrade for it, but I don't know how much difference it makes. The TB was an afterthought, you don't really need it, but as long as I gad a 65mm manifold opening, I figured it wouldn't hurt to have a 65mm TB.</TD></TR></TABLE>

he drives a gsr....

Re: (dornon13)
 

Thank you Captain Obvious. I was explaining why I bought the manifold. I haven't measured the runners on a GSR, so I don't know about that manifold.

Re: (dornon13)
 

yeah TB and IM....

if you have a gsr I would just simply upgrade to the skunk2. If any when you have the extra funds, it wouldn't hurt to open the stock 62mm gsr TB to 64mm to that of the inlet on the skunk2 IM.

You possibly could see no gain from a larger TB but only perhaps better throttle response. Forced air is forced air.
https://honda-tech.com/forums/images...s/emsmilep.gif

Re: (Charlie Moua)
 

I appreciate the info man https://honda-tech.com/forums/images/smilies/emthup.gif

Thanks to everyone for being so helpful... i think i am just going to stick with my 28RS and just switch to a nice mani so i can have a 3 inch DP &gt; Thermal 3 inch.