400rwhp +++ stock turbo (Hiflo)
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Joined: May 2005
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From: Auckland NZ
Originally Posted by bobybeach
hows this for a high flowed s4 turbo? This was orinaly a common as muck to4b V trim wheel with p trim turbine. This has been mated to my s4 hitachi turbine housing so will bolt back to original manifold. im hoping will flow 300-350rwhp the v trim compressor is flow rated at 43lbs/min. the only real visual diference is the slight increase in compressor housing size and no water lines, but to most this will apprear to be a stock turbo.
I got all going this weekend, and to my suprise it seems to hold .5-.6bar boost with internal wastgate. Im sure the housing is chocking the bridgeport, but the boost responce is real powerfull. theres no noticable lag with a real strong punch at about 3000rpm that continues to 8000rpm. I havent taken it past that yet.
Joined: Oct 2003
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From: Morristown, TN (east of Knoxville)
...if all else is stock.
with a full exhaust, intake, TID, removed emissions, you should be seeing 220-235 at 10psi.
My turbo vert, with the same mods, made 215 at only 6psi because the boost controller was screwed up.
with a full exhaust, intake, TID, removed emissions, you should be seeing 220-235 at 10psi.
My turbo vert, with the same mods, made 215 at only 6psi because the boost controller was screwed up.
Senior Member
Joined: May 2005
Posts: 322
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From: Auckland NZ
I should be seeing 350rwhp. the compressor is rated at 450hp and the turbo is using the t4 ptrim turbine also.
Originally Posted by RotaryResurrection
...if all else is stock.
with a full exhaust, intake, TID, removed emissions, you should be seeing 220-235 at 10psi.
My turbo vert, with the same mods, made 215 at only 6psi because the boost controller was screwed up.
with a full exhaust, intake, TID, removed emissions, you should be seeing 220-235 at 10psi.
My turbo vert, with the same mods, made 215 at only 6psi because the boost controller was screwed up.
Senior Member
Joined: May 2005
Posts: 322
Likes: 0
From: Auckland NZ
today i upgraded from to4b v trim to t58 (tso4) compressor to my hitachi turbine housing. I was expecting that this would be the limits to controling boost with the internaly wastegated s4 housing on bridgeport 13b.
However i was suprised to see that the t58 actualy held .4 bar were the t04b was holding .6bar. This i think is because the to4b has clipped turbine wheel giving less turbine back pressure making the wastegate less effective than when using the t58 with none clipped turbine.
the t58 did not profom well at such low boost were as the to4b vtrim seemed to be at its peck performance. So i will try another run tomorrow with boost tape at .6 and also 1bar runs.
I guess this is cheating now because the to4e housing would not be able to fit in original position. but still interesting test.
However i was suprised to see that the t58 actualy held .4 bar were the t04b was holding .6bar. This i think is because the to4b has clipped turbine wheel giving less turbine back pressure making the wastegate less effective than when using the t58 with none clipped turbine.
the t58 did not profom well at such low boost were as the to4b vtrim seemed to be at its peck performance. So i will try another run tomorrow with boost tape at .6 and also 1bar runs.
I guess this is cheating now because the to4e housing would not be able to fit in original position. but still interesting test.
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