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FCP Euro

lookforjoe

Member Since 22 Nov 2007
Online Last Active Today, 04:10 PM
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Topics I've Started

Let's Talk About Turbo Sizing, Trim, A/r And Exhaust Back Pressure Ratios

26 January 2012 - 02:10 PM

Trying to decide what if anything I can do about the EBP I see with my current setup, since it's all coming apart for the bottom end rebuild.

Ben & I started having a conversation about back pressure & what to do about optimizing flow, given that any changes are always a compromise between spool time, etc.

What I'm specifically trying to determine is where the 'choke point' is with a given setup; I would assume that it is in the turbine wheel sizing & the chamber needed to support it - but maybe not. In looking for potential alternate turbos, there are plenty that use impellers no bigger than my TD05H (56mm Major) in smaller A/R housings, that are rated for over 500HP.

I am also unclear on "trim".

Maybe I'm confusing the A/R.

For reference, my setup is: Short runner Intake. Ported '03 head. Enem 9.6mm lift cams. LG Speed header, feeding the TD05H 10cm2 (.73 A/R) 56mm impeller, 59/76mm compressor (Garrett 60-1) Exhaust is all 3", with 1.25" WG dump pipe feeding back into main pipe

The problem I see (now that I can measure EBP @ the collector) is that the pressure rises to 1 bar over IBP under higher rpm (5600-8200) WOT conditions.

I'm trying to determine if:

1)a larger A/R housing would alleviate that

2)if the exhaust impeller just needs to be larger, say 65mm (TD06) Link to my impeller

3)or if porting the wastegate opening & dump chamber would help.

I already did this (ugly, perhaps, but functional):

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Originally, the WG dump was closed off, and all the flow had to make a sharp turn into the main outlet. What I have has to be an improvement, but since I never measured EBP before I installed the header, I have no idea how bad it was before. I don't experience boost creep or drop off, so I don't see how modding the WG is really going to make any difference.

Aftermarket Cam & Cover Locking Tools Feedback?

03 January 2012 - 09:53 PM

Hi

I know some on here have bought this tool set, I just don't recall who it was - I'm curious about the quality.

The price has come down again to under $200, so I'm thinking about getting a set

Any feedback on the quality?

Tuner Lugs M12X1.75 Custom Lengths - Where To Buy?

23 December 2011 - 01:09 PM

SInce the summer when I put the Motegi's on, I have been trying to locate Tuner style lugs in 33mm instead of the standard 27mm length, partly because I'm using 4mm spacers & don't feel that I have enough of a safety net in terms of thread purchase in the hubs.

So far, I haven't come up with anyone who sells longer TUNER lugs in our thread pitch & size. There must be others on here using Tuner style, what have you come up with?

What about converting to studs & nuts, anyone done that? Must be Tuner style, or they won't fit the wheels.

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Horrible Vibration @ Idle - Not My Xr ;-)

22 December 2011 - 01:30 AM

The Mustang started acting like it was misfiring, and the vibration through the body felt like a buggered motor mount.

Went under & found this:

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Gonna say this is the culprit....

V70 Fmic Install - Cut Valance Required 31x12x3 Intercooler

16 December 2011 - 09:15 PM

I did search, honest. The linked thread in read don't comment only shows Adams' basic FMIC setup (should have internal links to other variations in the first post) until you wade through closer to the end...

Anyway, I'm going to go with a deeper (31x12x3" vs 28x8x3.5"), but 1/2" narrower core, I have no clearance between bumper & AC cond with the 3.5" core & don't like them rubbing together. A small air gap is always preferable for heat dissipation, I'm sure.

I'll need to cut the valance as shown. I know someone on here did this, I'd like to see the pics again for reference before I hack it up. My intention will likely be to reinforce the fibre panel, or add a cross brace, I dunno.

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