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Re: lz9 3900 V6 buildup
Posted: Sun Jan 02, 2022 10:39 pm
by Shaun41178(2)
Did a 4th gear pull and saw my boost gauge hit 17 lbs. I wasn't dataloggging so not sure if I was actually at 17 or if the gauge was just reading high
I have been mulling it over for about a month now if I want to take it back to the Dyno and do a 20 lb tune. I am leaning towards doing it.
Re: lz9 3900 V6 buildup
Posted: Sat Jan 22, 2022 9:20 pm
by The Dark Side of Will
If you can keep enough octane in the tank...
Re: lz9 3900 V6 buildup
Posted: Sun Mar 27, 2022 11:20 pm
by Shaun41178(2)
Small update that noone will care about. I was able to confirm that my boost gauge is reading about 3 lbs too high. My buddy noticed it it hitting 17 lbs as well.
So I took a datalog and I saw the gauge around 15-16 at 4100 rpm but the map was reading mid 13s.
I made the switch to e85 and did some tuning today. Got it dialed in cruising and at wot up to about 4800 rpm. I ended up multiplying my pump 93 VE tune by 1.30. My ego correction was within 1-2%. Lol. Piece of cake.
This is still the stock factory longblock 3900.
Re: lz9 3900 V6 buildup
Posted: Fri Apr 15, 2022 12:06 pm
by Shaun41178(2)
Ebc. Gonna try and ramp more boost in after 5k rpm to maintain tq.
- IMG_20220414_215107704~2.jpg (781.91 KiB) Viewed 6450 times
Re: lz9 3900 V6 buildup
Posted: Wed Apr 20, 2022 8:49 pm
by Shaun41178(2)
Crude mounting. I plan to wire it so that the ebc only is capable of working when the intercooler pump is on. It's somewhat of a safety mechanism.
- IMG_20220420_204641075~2.jpg (791.98 KiB) Viewed 6404 times
Re: lz9 3900 V6 buildup
Posted: Fri Apr 22, 2022 1:08 pm
by eHoward
having owned a number of turbocharged vehicles and always wondering how much a difference something like that would make I'll definitely be curious to see before and after.
Re: lz9 3900 V6 buildup
Posted: Sat Apr 23, 2022 12:51 pm
by Shaun41178(2)
eHoward wrote: ↑Fri Apr 22, 2022 1:08 pm
having owned a number of turbocharged vehicles and always wondering how much a difference something like that would make I'll definitely be curious to see before and after.
Well it works. 22% dusty cycle added 1.5 lbs more boooooost. I gotta play with it more. It needs to be done on a Dyno however.
Re: lz9 3900 V6 buildup
Posted: Fri Apr 29, 2022 11:20 pm
by Shaun41178(2)
Upgrading fuel system. Using a fore filter rated for e85 instead of a stock replacement paper filter
Fyi the fore filter fits in the stock fiero bracket.
- IMG_20220429_190814534~2.jpg (1.35 MiB) Viewed 6295 times
Re: lz9 3900 V6 buildup
Posted: Sat Apr 30, 2022 2:28 am
by ericjon262
I've never heard of Fore, looks like a nice piece. I will be using a Fuel lab filter on mine when I get around to making the fuel system better.
Re: lz9 3900 V6 buildup
Posted: Sat Apr 30, 2022 7:49 pm
by Shaun41178(2)
Fits stock v6 filter bracket
- IMG_20220430_194742895~2.jpg (1.41 MiB) Viewed 6278 times
Re: lz9 3900 V6 buildup
Posted: Sat Apr 30, 2022 9:11 pm
by The Dark Side of Will
Boomshakalaka
Re: lz9 3900 V6 buildup
Posted: Thu May 05, 2022 8:21 pm
by Shaun41178(2)
Well. It's Dyno ready pretty much on e85. I'm out of injector though which was expected.
Re: lz9 3900 V6 buildup
Posted: Thu May 05, 2022 8:54 pm
by pmbrunelle
Pulse width is actually rising slightly as you approach redline, so I suppose that torque is either constant or slightly rising.
Does that give you the feeling of driving a sports car, vs. a minivan that runs out of breath up top?
Re: lz9 3900 V6 buildup
Posted: Thu May 05, 2022 11:54 pm
by Shaun41178(2)
Pulse width keeps rising but power is still falling off. The stock cam kills power after 5500 rpm.
Which is why I am working on dialing in my duty cycle of the ebc so I can lessen that hard fall off up top.
Id love it if I had the same tq at 6k rpm as I did at 4500. On the 93 octane dyno, power fell off about 50 hp by 6200 rpm from peak
Re: lz9 3900 V6 buildup
Posted: Mon Aug 01, 2022 3:26 pm
by Shaun41178(2)
I have installed ID 1050 injectors as I had an injector stick wide open on the number 4 cylinder. Fuel was pouring out of the exhaust every time I revd it.i planned to just enjoy it for a bit on the 80lb injectors but with the injector going bad pushed up my time table.
I have just started it and idled it with the 1050s but that's as far as I have gotten so far.
Re: lz9 3900 V6 buildup
Posted: Mon Aug 01, 2022 3:31 pm
by eHoward
If you stick a sparkplug in the exhaust with fuel coming out the exhaust, you could have budget anti-lag
Re: lz9 3900 V6 buildup
Posted: Thu Aug 04, 2022 10:48 pm
by Shaun41178(2)
Gotta fire my install guy. Pump came off the pickup tube leaving me stranded. Good thing I was in the garage though when it happened, so I didn't have far to get home to pull the tank.
Although I did just put 7 gallons in it which always happens when you have pump problems.
I'll have it back running tomorrow.
I
- IMG_20220804_223508_01.jpg (1.95 MiB) Viewed 6044 times
Re: lz9 3900 V6 buildup
Posted: Thu Aug 04, 2022 11:22 pm
by Shaun41178(2)
eHoward wrote: ↑Fri Apr 22, 2022 1:08 pm
having owned a number of turbocharged vehicles and always wondering how much a difference something like that would make I'll definitely be curious to see before and after.
A couple of pics of logs with the ebc.
100% duty cycle up to 3900 rpm. This was on the street 4th gear
- IMG_20220804_225524203.jpg (4.78 MiB) Viewed 6043 times
Re: lz9 3900 V6 buildup
Posted: Thu Aug 04, 2022 11:25 pm
by Shaun41178(2)
Here is the Dyno in 4th gear with much less duty cycle. Ebc does work.
- IMG_20220804_230130916~2.jpg (1.94 MiB) Viewed 6042 times
So you can see that at the same 3700 rpm I have 6 more lbs of boost vs essentially no duty cycle.
Also the boost hit 20 lbs by 4k rpm with 100% DC, vs only 11 lbs on the Dyno with zero DC on the ebc
I have to play with it a bit more to dial it in where I want it.
Re: lz9 3900 V6 buildup
Posted: Sat Aug 20, 2022 9:12 pm
by Shaun41178(2)
here are a couple more screenshots of the boost controller vs boost controller off.
- boost controller.jpg (44.03 KiB) Viewed 6013 times
- no boost controller.jpg (40.56 KiB) Viewed 6013 times
big difference for spool up. its prob worth another 60 tq at least from 3500 to 4k rpm.
I think I am just gonna bypass all the factory fuel pump wiring, and hotwire the pump with a 12 gauge, and put in a bulkhead fitting at the fuel sender and run the wires through that from erics thread. I hope that will get me another volt or two at the pump, and a bit more headroom. The injectors are good to over 650 whp with e85, if I have the pump or pumps to do it.