[AmuroRay]

Originally Posted by VGSON

amuro, Im referring to the f87 platform and aftermarket inlets.

Ive read thru scottygrapes thread. He’s got the new pure setup on his, billet adapter. He may have a custom setup though as his silicon piece wasn’t correctly made. I have the ftp v2 on mine..Hopefully once the leak is sorted and final tuning is done I can see if this inlet is an issue.

I’m on my phone, so I got mixed up who had the F10. Yeah, the V2 is better than the V1 which was a stock replacement. I believe there is a thread on a few of them compared and the MST V2 was “the best” but that was worth an extra 1%WGDC.

I’ll check for it in a bit

[InHousePerformance]

Originally Posted by VGSON

amuro, Im referring to the f87 platform and aftermarket inlets.

Ive read thru scottygrapes thread. He’s got the new pure setup on his, billet adapter. He may have a custom setup though as his silicon piece wasn’t correctly made. I have the ftp v2 on mine..Hopefully once the leak is sorted and final tuning is done I can see if this inlet is an issue.

Are you talking about the turbo inlet or the boost tube from the Turbo to the intercooler. I think its necessary to have the billet inlet and run a 3” intake minimum, but my concern would then be the boost tube. The tube after the intercooler and the charge pipe are all 3”. So I might fab up a new boost tube cause thats the only thing that looks sus to me on flow restriction.

[VGSON]

Originally Posted by InHousePerformance

Are you talking about the turbo inlet or the boost tube from the Turbo to the intercooler. I think its necessary to have the billet inlet and run a 3” intake minimum, but my concern would then be the boost tube. The tube after the intercooler and the charge pipe are all 3”. So I might fab up a new boost tube cause thats the only thing that looks sus to me on flow restriction.

The inlet to the turbo…Intake side

Im not sure on restriction of the cold side. turbo to throttle body…bigger is always better, but the inlets and outlets of the intercooler will need to be upgraded if you’re going that route. Fabbikg those parts to use more secure silicon and tbolt clamps would be more beneficial i believe vs using the factory c clamps…Although….People redid the outlet side of the big boost kit and seen benny’s..So dig into that

Honestly, a few psi will make up the difference..Once you’re getting 24/25psi from fhe turbo and its moving 600hp worth of air..then i would look at lowering restrictions..Meaning lowering psi levels but increasing grams/sec of air…much like porting s head.

Im not there yet, once i’ve maxed out my current fuel system, then i’ll address whats next. Like lpfp, injectors, & an intake. Just have to wait and see..Im already spinning tires at the top of 2nd gear, sooo we’ll see what 24/25psi is like in 3rd and 4th….Probably going to 18’s and wider/softer tires:..

[InHousePerformance]

So I just did a boost pressure test again after making some adjustments. The leak is much smaller. But after calling and talking to Turbosmart about my 50/50 blow off valve leaking during this test they said their will be some leakage from the vent to atmosphere areas but nothing the turbo cant over power. So I just did three tests so tell me what you guys think. These were all leak down tests starting at 30psi.

30psi-20psi = 8 secs
30psi-10psi = 22 secs
30psi-0psi = 47 secs

I think this should be ok what do you guys think?

[InHousePerformance]

Well put the car back together and still cant hit target in 1st-3rd waste gate opens and I start losing boost. Then I tried in 4th and 5th gear and it gets closure to target only 1 psi off and holds from 3600-5200rpm (when I let off). Seems more normal. I did another leak down on the whole system minus charge pipe and it held 25 psi longer then when I just did the turbo, inlet and intake in my previous post. I wonder if I have a leaky manifold seal or map Oring or something. Im gonna take that off today and check everything.

[mwpa71]

Originally Posted by InHousePerformance

So I just did a boost pressure test again after making some adjustments. The leak is much smaller. But after calling and talking to Turbosmart about my 50/50 blow off valve leaking during this test they said their will be some leakage from the vent to atmosphere areas but nothing the turbo cant over power. So I just did three tests so tell me what you guys think. These were all leak down tests starting at 30psi.

30psi-20psi = 8 secs
30psi-10psi = 22 secs
30psi-0psi = 47 secs

I think this should be ok what do you guys think?

Are you using the dual port divertor valve?

[InHousePerformance]

Originally Posted by mwpa71

Are you using the dual port divertor valve?

Not anymore I designed a block off plate for rhe stock diverter valve location and lut a tial 50mm BOV on my charge pipe.

[InHousePerformance]

UpDate: I found my issue. It was the exhaust its to restrictive. The collector where my down pipe exit was 3.25” and it went down to a single 2.5” before going to dual 2.5” exhaust. I removed my exhaust and I was able to hit my targets with 88-89% wgdc.

I started building my new exhaust yesterday and will finish it today. I opened up the bottom of my down pipe to 3.5” and did a single 3.5” to the axle and then dual 3” out. I will post pics later today.

[AmuroRay]

Originally Posted by InHousePerformance

UpDate: I found my issue. It was the exhaust its to restrictive. The collector where my down pipe exit was 3.25” and it went down to a single 2.5” before going to dual 2.5” exhaust. I removed my exhaust and I was able to hit my targets with 88-89% wgdc.

I started building my new exhaust yesterday and will finish it today. I opened up the bottom of my down pipe to 3.5” and did a single 3.5” to the axle and then dual 3” out. I will post pics later today.

Love a good exhaust build, what’s the weight? And can you share before and after logs?

What was WGDC before on the 2.5 and what it’s at after the exhaust.

[InHousePerformance]

Originally Posted by AmuroRay

Love a good exhaust build, what’s the weight? And can you share before and after logs?

What was WGDC before on the 2.5 and what it’s at after the exhaust.

Before was 99% and still couldnt hit target all the way and through out the rpm range would stay 98-99%. Just to maintain 21-19psi.

Pure 750 5th gear log old exhaust

After I actually hit target Im able to maintain 22-20 psi with low 90% wgdc

Pure 750 5th gear log just down pipe

Cary clearly has a taper built in to the tune so once the exhaust is done and he sees these logs hell be able to make the right adjustments.

[VGSON]

Originally Posted by InHousePerformance

UpDate: I found my issue. It was the exhaust its to restrictive. The collector where my down pipe exit was 3.25” and it went down to a single 2.5” before going to dual 2.5” exhaust. I removed my exhaust and I was able to hit my targets with 88-89% wgdc.

I started building my new exhaust yesterday and will finish it today. I opened up the bottom of my down pipe to 3.5” and did a single 3.5” to the axle and then dual 3” out. I will post pics later today.

Awesome. I have a rattle in my MPE muffler and have been contremplating making a similair exhaust. 3.5 in from downpipe back...Thanks for the research and nudge to do so....Do you have a catted down pipe or open? I have the 200 cell 4"

[InHousePerformance]

Originally Posted by VGSON

Awesome. I have a rattle in my MPE muffler and have been contremplating making a similair exhaust. 3.5 in from downpipe back...Thanks for the research and nudge to do so....Do you have a catted down pipe or open? I have the 200 cell 4"

No cat in my downpipe and it is now 4” to 3.5”

I made this downpipe myself like 4 years ago and it was 4” at the turbo and then had the stock exhaust collector size which was 3.25”.

[mwpa71]

Originally Posted by InHousePerformance

Before was 99% and still couldnt hit target all the way and through out the rpm range would stay 98-99%. Just to maintain 21-19psi.

Pure 750 5th gear log old exhaust

After I actually hit target Im able to maintain 22-20 psi with low 90% wgdc

Pure 750 5th gear log just down pipe

Cary clearly has a taper built in to the tune so once the exhaust is done and he sees these logs hell be able to make the right adjustments.

Low 90's is a tad high for 22psi.
I am still sorting out my wmi.. but I am seeing 25psi at 90 even.. 750 pwg, port wmi, forged, 9.5 comp.

[InHousePerformance]

Originally Posted by mwpa71

Low 90's is a tad high for 22psi.
I am still sorting out my wmi.. but I am seeing 25psi at 90 even.. 750 pwg, port wmi, forged, 9.5 comp.

Yeah well its a big improvment from what it was so hopefully Cary sees that and we can make some changes to the tune cause theres some other stuff going on for sure. So we will see what he says.

Im also running wmi even tho I took my direct port off Im still running a 500cc injector in my charge pipe with a 50/50 mix. Much need in Az right now.

As for my build Im also 750 but I am EWG, forged with 10.2 compression and E85 with M5 injectors and Dorch lift kit and stage 2 hpfp.

I do know that PWG cars and EWG cars have very different values when it comes to wgdc. aEWG cars tend to be high then PWG cars for a number of reason.

[mwpa71]

Originally Posted by InHousePerformance

Yeah well its a big improvment from what it was so hopefully Cary sees that and we can make some changes to the tune cause theres some other stuff going on for sure. So we will see what he says.

Im also running wmi even tho I took my direct port off Im still running a 500cc injector in my charge pipe with a 50/50 mix. Much need in Az right now.

As for my build Im also 750 but I am EWG, forged with 10.2 compression and E85 with M5 injectors and Dorch lift kit and stage 2 hpfp.

I do know that PWG cars and EWG cars have very different values when it comes to wgdc. aEWG cars tend to be high then PWG cars for a number of reason.

Cool..heading in the right direction then..I know ewg and pwg wgdc values are different....I did think that up top is is reflective of the turbo load..but I don't know for sure..
How are you finding it compared to ps2?

[InHousePerformance]

Originally Posted by mwpa71

Cool..heading in the right direction then..I know ewg and pwg wgdc values are different....I did think that up top is is reflective of the turbo load..but I don't know for sure..
How are you finding it compared to ps2?

It feels faster already but Ive only had it with the exhaust fix for one day now and only drove 10 miles. And the weather here in Az is hot af right now so not the greatest for power even with wmi. Im going to drive it tomorrow morning and Ill be able to get a better assement then.

I think Ill really know once I get my next couple revisions and we can start doing 25-28psi and clean up the boost through the RPM range.

Ive been dealing with this issue for a few weeks now so just happy to figure it out and keep pushing on!

How about you? Or did you just go straight to the 750?

[mwpa71]

Hard to lean on it when it's hot for sure.. hopefully all goes well for you pushing ahead with higher boost.

Had ps2 for 5 years....ran amazing without a hiccup until I took it a little far....chipped an exhaust blade.
Made great power and very resposive.

To early to say with the 750..its spools slower for me. I am only on base map though..have been dealing with boost leaks... pcv issues .. and now wmi leaks so I haven't got to far..
Waiting on some parts from uk....

[InHousePerformance]

Originally Posted by mwpa71

Hard to lean on it when it's hot for sure.. hopefully all goes well for you pushing ahead with higher boost.

Had ps2 for 5 years....ran amazing without a hiccup until I took it a little far....chipped an exhaust blade.
Made great power and very resposive.

To early to say with the 750..its spools slower for me. I am only on base map though..have been dealing with boost leaks... pcv issues .. and now wmi leaks so I haven't got to far..
Waiting on some parts from uk....

Yeah I did the same thing but I actually spit a exhaust blade on my PS2 but it ran great for a couple of years. Dyno did around 520whp but that was with an O2 going bad so it was easily a 525+whp car. Good 0-60s and 1/4 street times in the 11s.

Damn sounds like what Ive been going through. Trying to track down boost leaks and pcv issues as well. Did you block you PCV ports in your cylinder head?

I feel like I got it all sorted now as the system holds 30psi well and leak down with the engine is minimal when I do a full shsyem pressure test.

[Kiddvegas]

Originally Posted by AmuroRay

Love a good exhaust build, what’s the weight? And can you share before and after logs?

What was WGDC before on the 2.5 and what it’s at after the exhaust.

Your theory on a bigger exhaust for these cars is definitely right at this point.

[AmuroRay]

Originally Posted by Kiddvegas

Your theory on a bigger exhaust for these cars is definitely right at this point.

And they called me a madman!

[mwpa71]

Originally Posted by InHousePerformance

Yeah I did the same thing but I actually spit a exhaust blade on my PS2 but it ran great for a couple of years. Dyno did around 520whp but that was with an O2 going bad so it was easily a 525+whp car. Good 0-60s and 1/4 street times in the 11s.

Damn sounds like what Ive been going through. Trying to track down boost leaks and pcv issues as well. Did you block you PCV ports in your cylinder head?

I feel like I got it all sorted now as the system holds 30psi well and leak down with the engine is minimal when I do a full shsyem pressure test.

Yeah its been painful this swap over.
Car ran perfect on Ps2. Was off the road for almost 6 months waiting for 750...was expecting a straight swap and go but hasn't worked out that way.
Didn't block ports...thats how I found my pcv was stuffed,, all the pressure when boost testing went out through the oil filler cap hole...
Mines holds well at 25 lbs.
Are you spooling quick as ps2?

Ps i did a big build on a Subaru years back...100 plus dyno tests...the exhaust merge caused major back pressure...as we went bigger , power jumped massively...actually silimilar to your size.

[InHousePerformance]

Same!! My car ran strong on PS2 and had only little isses here and there over time but nothing major but this build and swap over to the 750 has been a journey with trying to get this thing dialed after the build.

I dont know if you follow my youtube or instagram In House Performance YouTube but Ive had to pull the motor twice and thought I had blow by when I was pressure testing but it ended up being those damn pcv ports in the head that was leaking out of the oil fill cap. And then the exhaust issue so yeah its been exhausting but hopefully got it all figured out.

Got a revision from Cary did some pulls today but its to hot even with meth Im still in the 100s IATs so Ill get some better data tonight when it cools down.