LQ9 Gt4202 whp estimate?

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Apr 9, 2013 | 09:16 PM

jlee29

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From: California

LQ9 Gt4202 whp estimate?

I would appreciate some projected Whp estimates for my setup, I am getting close to being finished and am wondering what to expect at my dyno session.

Stock Lq9 with arp 2000 rod bolts
Stock 317's/PAC 1518's/ARP head bolts/GM MLS headgasket
224/224 .563/.563 116LSA
Ls6 intake/ P&P TB/ 25% UD pulley/ 2.5 bar map
Bosch 95# injectors/ Walbro 400 / 8an feed/ 8an return
Garrett GT4202 journal bearing/ T4 divided 1.28 a/r housing
Twin scroll truck manifold hot side
93 octane / Meth injection
12psi-16psi

Built T-56/Aluminum DS
3.56 gears/Q45 rear/30-spline axles
1991 240sx 2800lbs

Thank you in advanced for you time and input

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IMAG0955 | Flickr - Photo Sharing!@@AMEPARAM@@http://farm9.staticflickr.com/8514/8496586566_9abbd4fbf9_m.jpg@@AMEPARAM@@8496586566@@AMEPARAM@@9abbd4fbf9 by jakelee29, on Flickr[IMG]

Apr 10, 2013 | 08:41 AM

DrTurbo

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600-650 sustained.......can peak at 700 but will drop like a rock after 5500rpms.

Apr 10, 2013 | 07:59 PM

jlee29

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Thanks Dr.Turbo, Will it drop off like a rock after 5500 because of the smaller T4 housing?

Apr 10, 2013 | 08:21 PM

LS5.3stang

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Quote:

Originally Posted by jlee29

Thanks Dr.Turbo, Will it drop off like a rock after 5500 because of the smaller T4 housing?

i can tell u its the 75mm exhaust turbine that is your restriction

Apr 10, 2013 | 08:23 PM

DrTurbo

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Quote:

Originally Posted by LS5.3stang

i can tell u its the 75mm exhaust turbine that is your restriction

Yup...thats half of it, plus the GT42 cast compressor wheel kind of stinks.

Apr 10, 2013 | 08:51 PM

87silverbullet

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OP, sounds like you need to call Forced Inductions for an upgrade.

Apr 10, 2013 | 08:53 PM

stock48

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From: Colorado Springs, Co/ Central, Ca

I've seen it go ~ 740 RWHP on 370 CI thru a 4L80E. For some reason peaked ~ 6300RPM. 215/114 cam. Setup did have a really trick set of turbo headers.

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Apr 11, 2013 | 08:45 PM

jlee29

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From: California

Alright, I have been wanting to go with a BW but I think for now in my 2700-2800lb car 600-700ish will be more than enought for low 9's if I can get it to hook. Worst case I'll run it over the summer and if I dont like it I can upgrade to something a little bigger and better designed.
Stock48- If you have seen 740~ rwhp thru a 4L80 I think I should be able to make a little more through my T-56 and very light drivetrain setup. My car went low 11's @ 125mph on 422rwhp... And it probably had high 10's with some more practice. I only took it to the track once.