Sy 354 LQ9 Turbo still AWD is running

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Re: Sy 354 LQ9 Turbo still AWD is running

Well a quick update. I hit what was left of a deer in the road about 2 weeks ago. Didnt do a whole lot of damage except for exploding the drivers front fender arch. Thanks to JasonPickett, i got another pair of front arches painted and installed last night.

While it was down waiting for the cladding, i decided to pull the manifolds, paint them, wrap them, and got those reinstalled last night. Now that i can drive it again its back to tuning. My goal is to have some video of it to post by the end of the weekend. BTW I took vacation and the current plan is to be at NATS !
 
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jasonpickett

jasonpickett

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Re: Sy 354 LQ9 Turbo still AWD is running

He is about 3 hrs away to williamsport from the last time I checked. Doing the speed limit :)
 
UR50SLO

UR50SLO

V6+2=LSXCamaro
Re: Sy 354 LQ9 Turbo still AWD is running

I like the way the log manifolds are made... Be carefull with that wrap as it tends to cook the metal and fatige it causing cracking.
Makes the engine bay look nice and organized! Great choice on the XFI system..
And great job with the 4.3 running low 11's!!!!
Excellent Job!
~Scott
 
mattw

mattw

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Re: Sy 354 LQ9 Turbo still AWD is running

UR50SLO said:
I like the way the log manifolds are made... Be carefull with that wrap as it tends to cook the metal and fatige it causing cracking.
Makes the engine bay look nice and organized! Great choice on the XFI system..
And great job with the 4.3 running low 11's!!!!
Excellent Job!
~Scott
Click to expand...

I like log manifolds as well for turbo applications. I bet that the horsepower difference between these and a set of tubular headers is minimal.
 
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Re: Sy 354 LQ9 Turbo still AWD is running

mattw said:
I like log manifolds as well for turbo applications. I bet that the horsepower difference between these and a set of tubular headers is minimal.
Click to expand...

Yea I figure there are plenty of guys on ls1tech making well over 700 hp (as much as 1200hp) using factory truck manifolds flipped around and building a crossover to connect the two and mounting the turbo to that. I thought if they make that kind of power with factory cast manifolds I could build something similar in design that would fit nicely in the engine bay and make good power.

A huge plus is i can change all 8 plugs without having 14 diffferent lenght extensions, without jacking up the truck and going through the fenderwell, and while the motor is still hot without burning the crap out of my arms and hands.

I have run into an issue now that its back together. It ran flawless before i did all of this @ 7lbs of boost. Now that its back together, it breaks up when it spools. My thought is that since there is so much more heat being kept in the exhaust, and the ports are completely sealed now at the head (they were leaking significantly before) that My cylinder temps are much higher. XFI shows my A/F is still normal, and the truck acts like the old 4.3 would act when i had burned plug wires or bad plugs. I just picked up a set of colder heat range plugs and will screw them in this afternoon. I have my fingers crossed that they fix the issue.
 
Darin

Darin

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Re: Sy 354 LQ9 Turbo still AWD is running

You mentioned that you used a 4L80e that was already on the 4.3. When you switched over to a LSx fromt he 4.3, did you keep the same crossmember from 4.3 4L80e?

I'm considering doing the same thing, but putting the 4L80e in first on the 4.3, then in a couple years switching to a LSx. I'd hate to do things twice.
 
JSM

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Re: Sy 354 LQ9 Turbo still AWD is running

Unless you move the bellhousing forward or back same crossmember will work.
 
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Re: Sy 354 LQ9 Turbo still AWD is running

LowestForm said:
You mentioned that you used a 4L80e that was already on the 4.3. When you switched over to a LSx fromt he 4.3, did you keep the same crossmember from 4.3 4L80e?

I'm considering doing the same thing, but putting the 4L80e in first on the 4.3, then in a couple years switching to a LSx. I'd hate to do things twice.
Click to expand...


Im still using the same crossmember (JS), same converter and everything. I bought a TCI flexplate and spacer for the converter to seat in and it went together perfect.
 
Darin

Darin

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Re: Sy 354 LQ9 Turbo still AWD is running

That's what I figured. I thought there may be a possibility of moving the LSx back towards the firewall for better fitiment or something. I'll order up my 4L80e crossmember shortly then. Hey, an extra inch may have made all the difference. Ask my ex girlfriend :)
 
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Re: Sy 354 LQ9 Turbo still AWD is running

I got that radiator and modified it to fit under the core support without cutting the core support for exactly that reason. Just wanted to buy as much room in front of the engine as i could for easier maintenance and room for fans. The oil and trans coolers were in between the radiator and intercooler before so moving them under the bed and moving the radiator forward got me all the room I needed. The motor is as far back as it can go, I had to massage the heater box a little for the pass side head to clear.

I also put the colder plugs in it tonight and that cured my breaking up issue. It is feeling good now so hopefully i can get some video soon!
 
UR50SLO

UR50SLO

V6+2=LSXCamaro
Re: Sy 354 LQ9 Turbo still AWD is running

I also put the colder plugs in it tonight and that cured my breaking up issue. It is feeling good now so hopefully i can get some video soon!
Click to expand...

Cool.... do the LS engines need a smaller gap with boost or not... I've not done research on spark blow out on these engines...
~Scott
 
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Re: Sy 354 LQ9 Turbo still AWD is running

UR50SLO said:
Cool.... do the LS engines need a smaller gap with boost or not... I've not done research on spark blow out on these engines...
~Scott
Click to expand...

I havent really read anything saying yes or no. I put the cold plugs in with only gapped at 20 since i really didnt feel like pulling them right back out. I always ran a tight gap on my 4.3. I would imagine i could run a bigger gap with as much power as those coil packs make and now that i know its running good again i will probably experiment with that.

Also I had quite a bit of + O2 correction (spiked at +20 very dangerous) last night at full boost (only 7lbs right now). At first i blamed the heat outside and that I had made 5 or 6 "passes" and my intake temps were above 120 (usually around 90-95). Then my dad sitting in the passenger seat holding the laptop says "doesnt your fuel pump have two stages on it?" :banghead: Duh Its been so long since i ran the truck hard i completely forgot about that other little switch! I hit that on the next pass and had negative O2 correction (almost -10 which is a lot of fuel it is pulling out) on the entire pull and A/F ratio was right on 11.5:1 with about 18 degrees of timing at 7lbs. So as long as i remember to flip the fuel pump into high gear I am good and safe and can now start fine tuning to make it run smoother.

There is a place right in Westminster (formerly EIP Tuning) that had a nice dyno. The shop has changed names but If they still have it I want to get it up there and strap it down. It would be nice to tune on a dyno instead of on the side of the road.
 
UR50SLO

UR50SLO

V6+2=LSXCamaro
Re: Sy 354 LQ9 Turbo still AWD is running

Sounds like a good time for a hobb's switch that will operate the relay for the second fuel pump.

It's only going to take one time of not remembering that switch! XFI is a nice system and will

compensate alot but it's only going to be able to correct so much.

Great progress!
~Scott
 
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Re: Sy 354 LQ9 Turbo still AWD is running

Yea I know there is a way to have the XFI control the second stage of the fuel pump, that is next on my list to change. It seems there is no end to what the XFI can do!
 
4.8t

4.8t

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Re: Sy 354 LQ9 Turbo still AWD is running

we usually run tr6's at around .035 gap.

i'm confused on the tittle of the thread. i thought a 6.0 .030 over was a 370. or does the 354 stand for something else.
 
jasonpickett

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Re: Sy 354 LQ9 Turbo still AWD is running

4.8t said:
we usually run tr6's at around .035 gap.

i'm confused on the tittle of the thread. i thought a 6.0 .030 over was a 370. or does the 354 stand for something else.
Click to expand...

You are right with the 370ci but the 354 refers to his syclone number.
 
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