Patrick P931

There must be a difference between the usdm and the edm torque converter. ;)

On my commute to work this morning I did 3 fourth gear "pulls". I know this is crazy stupid and dangerous to both the engine and gearbox but I wanted to see when I get boost.

I would shift up a gear right away as the arrow would light up on the "sportshift" display. As soon as I could shift to fourth, at just below 50 km/h (approx 30 mph) I would floor it.

From approx 1500 rpm the engine goes wooooosh and then I'm at 4000 rpm.

My logs show that I get 1 bar (14.5 psi) at approx 3300 rpm and 1.4 bar (20.5 psi) at 3700.

The whole thing takes about 1.7 seconds, that is to go from fourth gear cruise to 20.5 psi.

Who wants faster spool than that? ;)

:)
Patrick

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07 FXT
400+ ?

meifert

I do. you can never have fast enough spool

Patrick P931

Seriously? That is like the blink of an eye to go from zero to 20+ psi from almost idle rpm.

What would you consider fast? Can you share a log?

__________________
07 FXT
400+ ?

meifert

I used to have a full 17 PSI on my red Mustang at 2400 RPMs with a Garrett GT3788R with the street tune and a full 24 PSI at 2600 RPMs with the track tune. that's fast spooling.

Patrick P931

On a 4eat? Then we do have different torque converters. ;)

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07 FXT
400+ ?

meifert

Mustangs don't use a 4EAT.

Patrick P931

Exactly, so why are we comparing apples to oranges? Then we could take a 16 liter Diesel truck that spools a GT40 and that would make your example slow. ;-)

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07 FXT
400+ ?

manitou

Do you really want good spool, drive ability and power? You'll need a good EL header, a good 3" CBE and if you really want good spool and boost control an EWG is the way.

If I was you I'd upgrade the injectors and pump, do a re-wire on the pump and get a good pump gas tune and an e85 tune. The VF52 is capable of pretty big power just like the VF48! I made 360WHP/ 450WTQ with my VF48 on my stock EJ255 and I had very fast spool on both pump and E85!

Do you have a Cobb AP? I'd recommend one for map swapping, data logging etc....


I would also upgrade the inlet hose. In fact I have a GMS inlet hose that worked perfectly, no leaks ever and is very sturdy, will not collapse. PM me if you're interested.

I'd also install a wide band/ gauge to monitor AFRs. I'd also relocate a new AEM IAT sensor in the IC right in front of the throttle body. You pick up the wire from the MAF harness and cut the one to the stock IAT sensor in the MAF assembly. This will give the ECU the correct intake air temps to monitor for timing compensation. Also loose the light weight pulley they do nothing except cause excessive vibration on the stock motor. They gain you nothing, they're a scam really!

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2006 XTI LTD, HP Techs/ MPS SS LR 2.5, '07 DCCD Pro 6 speed/ R180 drive line

LOUROK

How about a turbosmart WGA? A friend of mine wrote this article. I order one yesterday
Project GR STi - Impressions of the Turbosmart IWG75 and BPV

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VF-52 SH FXT
03 2.5x (gf's suby)
95 se-r turbo

manitou

Turbosmart makes pretty good stuff but I am partial to Tial and it's made right here in Michigan! The gains to be made are with an external gate and venting to atmosphere. No matter what you do with an internal gate you are still bringing it back to the same exhaust so you don't make the gains that an external gate will venting to atmosphere.

I'm running a Tial MVR gate an a Tial Q BOV with my fully built motor and Dom3.5 on a speed density tune. I had them with my VF build also and made 360WHP/ 450WTQ on the stock motor with Killer B headers. Oh yeah, I have a Supertrapp muffler on my EWG so it's quiet and leaves nothing on the table power wise!

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2006 XTI LTD, HP Techs/ MPS SS LR 2.5, '07 DCCD Pro 6 speed/ R180 drive line

Patrick P931

That article feels more like an advert and not something an engineer or someone with a deeper understanding of cars can relate to. ;)

Although I agree that an aftermarket actuator can be a good upgrade but not to tune for it... just makes me shake my head. ;)

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07 FXT
400+ ?

Patrick P931

And, as said above the "proper" way to go is external waste gate but that involves a lot of other work and imho none of that is necessary on smallish turbochargers such as the VF's. The gains are just not worth it according to me. :)

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07 FXT
400+ ?

meifert

all you need is an uppipe, wastegate bracket, wastegate and a tuner. if you are doing turbo swaps then you will need one anyways.

manitou

On the contrary, you will make a lot more torque with an external gate and a VF turbo and hold your power out farther. You can flow much more air at redline with an external gate if you vent to atmosphere.

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2006 XTI LTD, HP Techs/ MPS SS LR 2.5, '07 DCCD Pro 6 speed/ R180 drive line

Patrick P931

Of course you are correct performance wise about going ewg, without a doubt. :)

However when I add the cost it's just "too expensive per extra hp" for a VF, at least for me. The same or less money will get you a larger turbocharger, and then once you are really stuck in the tuning race, it's time for a built shortblock etc, then once you've got that done I'd go the ewg route. Could be just me. ;)

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07 FXT
400+ ?