nealnanoHX

Either get a silver surfer, garrett 57 trim or 60 trim. IMO the 50 trim will not get you to 400whp it is just so small.

wantboost

iTrader: (2)

I've heard precision say "Oil contamination" more times than I can count... and some of this was even on setups with pre-turbo oil filters lol.

Check the turbo with the car off... either you've devolped an ungodly boost leak, exhaust leak pre-turbo, or the bearing system or oiling supply has failed.

rich7777

So are Precision just one step up from God Speed then?

I've always kind of seen them as "cheap and cheerful "...

SilverEK96

iTrader: (11)

Done that sir.. vaccum leak check, all hoses, clamps, couplers.. even bought new manifold gasket and couplers .. no idle surge or anything .. holds idle steady. 2nd did compression test on motor, all have good compression. Checked for pre turbo exhaust leaks, all bolts and everythings on tight, no leaks at all!! 3rd took off my 6262 and put my friends sc34 on. Spools great! Went off wastegate spring and makes 8psi under 4500 rpm, more like 4300 ish. So i figured if i had a huge leak that turbo would be spooling late as well, but its spooling just fine like on his car. So im lost guys, anymore input on what this could possibly be??

SilverEK96

iTrader: (11)

Ha ha.. just saw the last thing you said "the bearing system or oiling supply has failed" I'm betting on this 110% !!!

OneBadTurboCRV

Of course I did, or my name couldn't be "never satisfied". We shall see, I hope to have it installed in a few weeks after my vaction (around my 5th one this year, haha). I just am trying it out because kids out here are always talking about them but never actually produce one. Worst case I go back and buy a new GT3076R or the likes and call it a day. It's just a lower horsepower daily (and toy when I want it to be). Nothing special...

Full-Race Geoff

ill throw my $0.02 here - i suggest borg warner S200SX 7670 with a T3 undivided housing, that thing gives huge bang-for-the-buck, it smokes a gt3076R on the three tests ive done with it. i can post up a comparison if youre interested to see

AFAccord

Thanks, I'd like to see that, but I'm curious as to the cost/availability of that unit.

Using the SquirrelPF calc, how do these look?* Here’s a link to my config in case I set it up incorrectly:

http://www.squirrelpf.com/turbocalc/...37&map_sel1=44



GT3071R



GT3782



T04E 50 Trim



T04E 57 Trim



*

Why does the 57 trim look that way? I would have guessed it would be one of the better suited maps.

AFAccord

S200 with same settings.



What does it mean that the map starts so high from the bottom?

EsotericImage

iTrader: (8)

read the FAQs' on how to read a compressor map and this will all make sense to you..


this is your build, knowledge is a nice thing to have so you know what ur talking about then speaking turbo related stuff with other people.

its not as difficult as you may think..

wantboost

iTrader: (2)

you;re also not using the right map for the s200... thats the old map for the straight, first, s200.... the way BW does it now is the s200/s300/s400 designates a family of turbochargers.... its the number after, like s200sx-76 in this instance that tells you which turbo it is

duugle

iTrader: (2)

I have a pretty similar question, I was able to buy a ball bearing 60-1 with a .70 t04s compressor housing and t4 .82 a/r for $650 with under 500 miles on it. I am building a sleeved 84mm ls/v with a '98 type r head with a supertec valve train and a doc race ramhorn manifold.

From what I read in this thread the turbo will be fairly peaky, but how bad will it be?

I am trying for 500whp on e85 and the car will be street driven but also drag raced on the track.

wantboost

iTrader: (2)

with a t4 turbine housing it will be pretty lazy... even though it's ball bearing.
the turbine housing shouldn't be .82 if its t4, thats a t3 housing... it's probably .84 at minimum

AFAccord

I've been reading up on the compressor maps, and they do make more sense to me now, but I'm still trying to grasp how to properly plot my engine onto it for comparison. I've been working with Greg at Go-Auto since I ordered my 60-1 from him, and he is recommending his SPEC Bullseye turbo as a good option.

"will flow 54 lbs per minute (that's more than a 50, 57,or 60 trim) will make more power and spool faster than a comparable 50, 57, 60 or 60-1 on the SOHC" - Greg

My last question is how do I choose between the .55 a/r or .70? Will the larger housing spool later and make more top-end, or will the .55 housing get me to 400 just as efficiently with a more usable power band?

duugle

iTrader: (2)

It is a .84 t4 divided, I was going from memory and didn't double chec

wantboost

iTrader: (2)

with 2.3 liters it's hard to tell... you need to figure out how much your head flows first... that will determine the flow characteristics of the motor...

.70 would probably be a better match for that much displacement and still give you a very reasonable power band... I see the .55 spooling quickly but dying up top on your particular application.

do you know the compressor and turbine wheel sizes? we need to understand what size turbo you're talking about

AFAccord

The F23A head I'm using is stock port, and it's not known for its flow capabilities. The last dyno I had was with a similar setup with a stock bottom end, but had a Bisi cam and head was milled .040" to bring compression up. 176/171 was all I could get out of it without headwork.

I don't see too much info about the turbo other than some dynos and stage 5 turbine wheel. I spoke to Greg this afternoon, but didn't know what to ask him about it spec-wise.

http://www.go-autoworks-store.com/gosptubybupo.html

http://www.d-series.org/forums/1543981-post1.html

wantboost

iTrader: (2)

its hard to say what exactly that compressor side is... I'll wait for theshodan to chime in, or see if greg will give you more info.

Not sure how I feel about a stage 5 turbine wheel in that housing with that compressor side... seems like a mismatch to me

AFAccord

I want to say he said something about 56 trim, but I could be wrong. I'll try to get ahold of him Monday. The D-series crowd really seems to love it; I'm not sure why it wasn't recommended earlier by him.

TheShodan

iTrader: (14)

That's either he 52mm or 56mm compressor wheels in the s200 cover. The exhaust wheel is a bit large for that Compressor wheel at over 74mm in size, but could make close to 500whp with higher boost pressure. If you must consider the "spec" turbo, stay in the .55a/r housing ( I used to use those a few years back, and depending up testing of bullseye's new version, may use them again from time to time. )

I don't recommend the .70a/r as that uses a v-band only and no other option. It will make the turbo very very peaky.

The d-series crowd have different uses than you. They may be a single cam, but is a completely different animal

AFAccord

That sounds very familiar.

He told me they add the V-bands to them in house too. Are you saying the v-band has something to do with it being peaky, or just the large compressor housing and wheel? So the .55 would be a nice choice for 300-400whp and good driveability? Are there any QC issues with Bullseye I should be concerned about?

wantboost

iTrader: (2)

well I got part of it right lol...

even though his head flows like ****, with 2.3l of displacement you don't see the .55 housing being just a tad on the small size?

TheShodan

iTrader: (14)

You gotta look at it from a housing/exhaust wheel ratio, and not each of them independently. For the amount of power that the 2.3 is looking at here with the cylinder head the .55a/r is not a problem with that exhaust wheel. The issue is the fact that it is not matched that well to the compressor wheel. For lower power levels like you are looking for, the flow characteristics of the exhaust wheel is fine; the problem is that large of a exhaust wheel has trouble keeping up with the compressor wheel... Regardless of exhaust housing used. Now if it were the true S256, I wouldn't be as concerned... But that compressor wheel likes to move, while the exhaust wheel doesn't do much. The 2.3 displacement helps with that, but if the cylinder head doesn't allow this turbine to move (which I don't think it does in this case) there is no point in using this SPEC turbo.. Use something a bit more matched up to work.. Stay .63a/r, a smaller exhaust wheel and compressor wheel match up.

wantboost

iTrader: (2)

that was my feeling as wheel... stage 5 wheel, that turbine housing... with a compressor wheel that likes high shaft speeds. Just wasn't feeling it was a good match for his application.

see what talking to you all the time does? All I do is analyze turbos now lol :p

eastbay92cx

http://www.evans-tuning.com/forums/v....php?f=2&t=805
http://www.evans-tuning.com/forums/v....php?f=2&t=860
http://www.evans-tuning.com/forums/v...php?f=2&t=3226
http://www.evans-tuning.com/forums/v...ic.php?f=2&t=7

Look for the posts by Jeff Evans (boosted hybrid).