W/S. Stock appearing IHI boost numbers?

[greendury]

I know boost doesn't tell the hole tale but what are guys seeing out of there s300 based ihi on the pulling track?? I'm only seeing around 34# at 3700rpm. I'm having a hard time driving the charger hard enough. 66m comp and 74mm turbine. Added some timeing seemed to help some.

 

[stealthy_max]

I was seeing 45 psi when I ran RCD's 66/74 IHI, but it was getting pushed pretty hard!

 

[greendury]

I was seeing 45 psi when I ran RCD's 66/74 IHI, but it was getting pushed pretty hard!

Was that on track boost numbers?

 

[stealthy_max]

Yes, 44-46 on the track. It would spike 50 psi on the street.

 

[greendury]

Yea that's what I was hoping for but I am just not seeing it. Maybe it's in the tuning

 

[stealthy_max]

It is.

 

[duramaxzak]

Make sure the waste gate is all the way closed and sealing good. When I ran a DTS Billet 66/74 IHI I wired the wastegate shut and was seeing 43-45psi pulling.

 

[greendury]

I don't think the waste gate is moving because I blocked the reference hose to it but I could try wiring it also. Thanks for the input

 

[stealthy_max]

I welded mine shut.

 

[IOWA LLY]

I don't think the waste gate is moving because I blocked the reference hose to it but I could try wiring it also. Thanks for the input

Drive pressure will blow it open as well......


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[greendury]

I guess I didn't think of drive pressure being able to over come the spring in the gate. I wish I would have just welded it when it was apart.

 

[pnw_lml]

I've seen 41 psi on stock everything expect motorops tunes


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[greendury]

On an lb7?

 

[Awenta]

On a stock ihi? Doubt it.

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[pnw_lml]

Nah, stock lml turbo. I wasn't familiar with imi til I googled it, now I'm just kinda familiar haha


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[greendury]

The guys that were seeing 40psi on track what size of an injector were you running?

 

[wilsondiesel]

On the street I have seen 43psi or so running a DTS 69/74 IHI running 100% over injectors and 10mm pump. Didn't pay attention on the track but will this weekend as I've got a pull Friday and Saturday night.

 

[duramaxzak]

I was running 45% injectors with 10mm pump.

 

[duramaxzak]

Here's an old video of it.

https://youtu.be/oONgaVcCpKI

 

[greendury]

I am running 100s with a 12mm pump. Thinking maybe to much fuel for my now 69/74 ihi. Possible that a smaller injector will allow me to run a bigger pulse width which should help drive the turbo harder.