BMF_Racing

iTrader: (6)

Specs on engine:

- Complete drop out -- 2001 LQ4 with 32,xxx miles.
- Long block is completely stock except:
-stock rings regapped to .030"
-80lb Siemens Deka Injectors EV1
-ARP2000 rod bolts
-ARP Pro head studs
-LS9 head gaskets
-ls6 yellow springs

-PTE PT4788 @ 12 psi & 17* timing.



Loose Bradco flashed 4500rpm -- Turbo 400 & 9" with spool and 35 spine


Does this seem about right output to you guys?

BMF_Racing

iTrader: (6)

sorry, forgot to mention it was a Dynojet Dyno. And AFR was 10.5 to 11.0.

offaxis

iTrader: (19)

Looks like some good numbers with your drivetrain. Any plans to turn up the boost at all?
Im sure a few more #`s of boost will get you some pretty big gains with that turbo

BMF_Racing

iTrader: (6)

I would like to make this block last for this season (no windows) and then next year it will have a stroker 408 all forged bottom end & CNC L92 heads with custom cam in the 6xx lift and 23x duration. I may go a few psi, but only shooting for 10.50's or so this year.

I wasn't really sure what to except so I wanted to see if this seemed about right for this setup to everyone on here.

SN-95

I would think it would push a little more with that size turbo. But that drivetrain is going to rob a lot, and sounds like a fairly safe tune so I'm sure your right where you should be.

Hank Peabody

iTrader: (2)

Sounds strong to me through an unlocked converter

TrentSS

What gear ratio are you running in that 35 splined 9"? Just curious.

BMF_Racing

iTrader: (6)

3.70 ring and pinion.

06X6spdGTO

iTrader: (6)

still on the stock lifters and timing chain set as well??
What fuel system are you running? (Walbro 255lph Pump, Twin pumps, Boost a pump, etc..)

Whats your race weight??

BMF_Racing

iTrader: (6)

Yep, engine totally stock except for what's mentioned above. I wanted to do a real stock LQ4 boosted test.

Aeromotive Eliminator pump 8an feed and 6an return. 80 lb injectors aero motive boost ref FPR.

Guessing 3800 with me and fueled up

06X6spdGTO

iTrader: (6)

Sounds good. Hope to see some good track results!! Ill bet you could add another 2lbs of boost run it all season and still not hurt it!

I'm working on a Gbody build myself this year with a 82' Regal Stock Bottom LQ9, Trickflow 220 heads, and cam N/A Build car weighs 2980lb with no driver. Hoping to see mid to low 10's

simplysix

iTrader: (1)

Not bad at all. Will make some really impressive numbers when the motors built fir more boost.

1972nova

iTrader: (13)

Nice numbers I plan to make 1000whp with my forged 370 and pt4788

BMF_Racing

iTrader: (6)

Just realized I was at 110mph @ 6000 rpm with 3.70 gear & 88" circumference tires on all my dyno pulls (high gear). That comes out to something near 19% slippage. prolly should have it tightened up a bit. That's gotta be causing some power loss.

Sarg

iTrader: (6)

How did it look up top? Was it holding boost steady? I would think those yellow springs might be an issue.

chasgiv3

iTrader: (1)

I would think a little more power out of that Turbo compression combination but you may be pulling a lot of timing out.

For comparison my setup with an 8.9:1 CR pulled 600RWHP through a TH400 and 12 bolt at 10PSI. I know I'm blowing through the converter at around 23.5PSI and above but I don't know my slip at 10PSI.

MillsMotorvation

well I maybe pushing my luck with my set up, but I want to see will it live! Got a new engine sitting on the stand. Got a completely stock LQ4, with 100xxx + miles, only thing I changed was the oil pan, oil pump, 60lb inject, LS6 cam&springs. 16 passes at 15lb boost, but timing is low 7.5-8.0. Getting HP to tune with, so I can turn up the timing. Also have a snow meth kit. Heads, and intake never been off.

BMF_Racing

iTrader: (6)

Yes boost was very steady once it was spooled up is was right at 12.0.

Slowhawk

iTrader: (12)

Gear and converter are killing your #'s and will affect track times.

I would switch to a 3.20-3.40 gear and tighten the hell out of the converter.

BMF_Racing

iTrader: (6)

I'm hoping the converter will be alittle tighter once there is a real load on it, the brake was not working on the dyno so we couldn't load the turbo. The entire pull from WOT @ 35mph to 6000rpm rev limiter was only 2.4 secs. I will know more after a few passes i suppose. I'm sure it will need to be tightened up for next yr's setup for sure.

The 3.70 should be ok, we only run 1/8 mile here (sucks ).