Quick background, in 2007 in got an APS single turbo installed on my stock block...made about 400whp at 10psi. Over the past few years I've purchased some extras, Stoptech BBK up front, Haltech, Cosworth manifold, 830cc Deatchwerk injectors...and most recently (couple months ago) the stage 1 long block from IPP. My friend finally got some free time to pull my old motor and install the new one. He put a turbo blanket on from PTP, header wrapped the crap out of all the exhaust piping pre-turbo, made a brace for my oil solenoid, replaced the fuel line in the engine bay to get rid of some of the unnecessary bends/fittings, custom catch can that vents both valve covers, and a custom external wastegate with a tial 38mm slime line gate. I drove the car home today with my old injectors/unichip for the break in, and have a tune scheduled at AMS in about 9 days. I'm sure there are some things I'm forgetting...but that's pretty much the meat of it.

Once car is tuned, Ill post numbers/graphs with results. Cross your fingers...I'm hoping to be pleaseantly surprised, but likely it'll be around 500whp.

 

moar pics

 

more pics...

 

last couple pics...

 

nice

 

Looking at pictures is my favorite. More pics.

 

somewhat dissappointing results...here's the dyno. any ideas from the experts out there as to what could be causing the boost issue up top?

 

What are the specs on the turbo....and everything else.

Was it always external WG or did you modify it to be external?

Most folks see 18-20rwhp per lb of boost (at least when twin'd)

tom

 

damn. upgrade turbo?

 

I think you turbo is runing out of breath.

 

turbo is the standard off the shelf turbo that came with the aps st kit - gt35r, BUT the housing(s) are smaller than normal. according to aps website they say 16psi is good for 650hp worth of air flow...but they're obviously blowing hot air up MY *** like my turbo is to my motor past 15psi. turbo is internally gated from the kit, changed that up to be an external gate with a tial 38mm slim line gate, i think it has 8.8lb spring which should be good for 17.6 psi if i'm not mistaken.

the tuner said possible causes being exhaust valve float or cam problems...but i'd think the car would run like crap through out the whole rev range if that were the case?

i think it's time to convert this pos kit to a twin kit.

 

/\/\/\
Is variable cam timing still turned on, and what is controlling it......

Maybe your cams aren't phasing

Tom

 

when my cams dont phase, its very noticeable in the boost curve. His boost curve looks pretty normal..

So basically you gained 50 hp while going with a lower compression motor. I'd say not bad.

 

fwiw cam phasing only works pre 5500rpm's (i've been told), so in theory that shouldn't impact my high rpm power.

 

not bad? when you figure in cost...that's a pretty terrible hp/$ ratio.

 

You have to keep in mind that you have a kit that was meant to work best with a stock motor. The T3 is just too small for big power.

 

already stated...

 

that's why i just need to add another one

 

Unfortunately, someone should told you that before you bought a built motor. No big secret that kit wouldnt make big numbers.

 

i wasn't looking for "big" numbers, just hoping for 500 to the tire...which i've seen a few other builds get.

oh well, back to the drawing board...