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LQ4 S480 Build

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Old 05-19-2014, 10:02 AM
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If it hooks and then unloads it sounds like you may have too much travel in the front end(which 5" is a lot) and it's topping out the shock and the abrupt stop of the shock topping out is causing it to unload.
Old 05-19-2014, 11:17 AM
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Originally Posted by Camaro9969
I'll def give you some numbers after we get it squared away but now thats what is going on right now it hooks then unloads but it was down a ton of power so this week i'll finally get some good data.............You have limiters up front????
No limiters. I think could probably hit the tire harder and it would obviously help if I was on a prepped surface, but this is what it does every time whether I warm up the tires or not.


I think to loosen the extension on the rear might help, but haven't taken the time to do it yet. There were some improvements made though because the car went from bouncing the tires to laying a solid stripe by making some adjustments on the compression.
Old 05-19-2014, 11:27 AM
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Originally Posted by Slow94Formula
No limiters. I think could probably hit the tire harder and it would obviously help if I was on a prepped surface, but this is what it does every time whether I warm up the tires or not.

GOPR0254 - YouTube

I think to loosen the extension on the rear might help, but haven't taken the time to do it yet. There were some improvements made though because the car went from bouncing the tires to laying a solid stripe by making some adjustments on the compression.
I say loosen that up a little see how it does. What are your fronts set at?? I can give you my adjustments as they are now it hooks very well on the street when I ripped it yesterday I'll get a video
Old 05-19-2014, 11:35 AM
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Originally Posted by Camaro9969
I say loosen that up a little see how it does. What are your fronts set at?? I can give you my adjustments as they are now it hooks very well on the street when I ripped it yesterday I'll get a video
In that video the front compression is pretty tight. I think 15 (might be 14) and extension was 3. I started with the extension a bit tighter. I didn't really notice a difference making that change though.
Old 05-20-2014, 02:44 PM
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I've found a LQ4 in junkyard for 750.00 with no ecu or harness. Good deal or pass?
Old 05-20-2014, 02:51 PM
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Originally Posted by juice009
I've found a LQ4 in junkyard for 750.00 with no ecu or harness. Good deal or pass?
Any type of guarantee/warranty with that? Shortblock, or longblock? Would be nice to know if it's a 2005+ LQ4 also.
Old 05-20-2014, 04:27 PM
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Its a 2001 from a GMC 2500 complete engine. No trans.
Old 05-20-2014, 04:49 PM
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Originally Posted by Slow94Formula
No limiters. I think could probably hit the tire harder and it would obviously help if I was on a prepped surface, but this is what it does every time whether I warm up the tires or not.

GOPR0254 - YouTube

I think to loosen the extension on the rear might help, but haven't taken the time to do it yet. There were some improvements made though because the car went from bouncing the tires to laying a solid stripe by making some adjustments on the compression.
It's not really hitting the tire.

Extension looks really tight in the rear. Where are your lower control arms positioned?
Old 05-20-2014, 09:37 PM
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Originally Posted by Slow94Formula
In that video the front compression is pretty tight. I think 15 (might be 14) and extension was 3. I started with the extension a bit tighter. I didn't really notice a difference making that change though.
Its not really weight transferring loosen it up and smack the back tire a little bet that helps a lot. Hopefully hitting the track tomorrow i'll get you some good numbers
Old 05-20-2014, 09:39 PM
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Originally Posted by juice009
I've found a LQ4 in junkyard for 750.00 with no ecu or harness. Good deal or pass?
Eh its not that great you will find better if you wait but try for an 04+ to get the better rods if you go with that gen your still fine but up to about 1000crank and on ragged edge.
Old 05-20-2014, 10:09 PM
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Originally Posted by Martin@Tick
It's not really hitting the tire.

Extension looks really tight in the rear. Where are your lower control arms positioned?
Lower control arms are in the bottom hole. Sitting on level ground they are at about 1.8° up. Compression was at 10 clicks from loose and extension was at 6 clicks from loose. I was leaving at 2700 with 1 lb of boost... I turned up the two step to 2900 and tried again tonight. Seemed to help, but still not hitting it hard enough I don't think. I also turned the extension back to 4 clicks.

Originally Posted by Camaro9969
Its not really weight transferring loosen it up and smack the back tire a little bet that helps a lot. Hopefully hitting the track tomorrow i'll get you some good numbers
I'll have to turn up the 2 step a little more and hit the tire harder. It seems lazy if I don't leave with at least 3 psi. Will be interesting to see where you end up with settings. Obviously each car is different, but I'll be curious to hear what you learn.

Last edited by Slow94Formula; 05-20-2014 at 11:21 PM.
Old 05-21-2014, 03:02 PM
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Originally Posted by Camaro9969
Eh its not that great you will find better if you wait but try for an 04+ to get the better rods if you go with that gen your still fine but up to about 1000crank and on ragged edge.
Thanks Doug. I'm all in on your setup. Im moving from old school SBC 383 to turbo. This will be my 1st Turbo ride, i purchased the 01 6.0 today. I have a 1/8 track in my area and my hopes are to get to 5.90's -6.0's on stock suspension BTW I have a '85 S10. I can see that there is a lot of knowledge on this thread alone, i'm starving for some direction with this turbo build. I notice initially the bottom end was fine when you started your build until u started putting up 10.5 outlaw #'s. lol Will the upgrades to the 6.0 like LS6 intake,upgraded springs, double timimg chain,oil pump,LS9 gaskets,tu2 cam and fuel rails be enough to prepare engine for turbos? As u can tell I'm following your blueprint. Thanks!
Old 05-22-2014, 10:40 AM
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Originally Posted by juice009
Thanks Doug. I'm all in on your setup. Im moving from old school SBC 383 to turbo. This will be my 1st Turbo ride, i purchased the 01 6.0 today. I have a 1/8 track in my area and my hopes are to get to 5.90's -6.0's on stock suspension BTW I have a '85 S10. I can see that there is a lot of knowledge on this thread alone, i'm starving for some direction with this turbo build. I notice initially the bottom end was fine when you started your build until u started putting up 10.5 outlaw #'s. lol Will the upgrades to the 6.0 like LS6 intake,upgraded springs, double timimg chain,oil pump,LS9 gaskets,tu2 cam and fuel rails be enough to prepare engine for turbos? As u can tell I'm following your blueprint. Thanks!
Well glad to help out with the build there are a lot of things that were new to me with this car and obviously a huge learning curve but its been a fun ride. As for the upgrades i would do exactly what you just mentioned and maybe just instead of the tu2 go with a custom cam specd by Martin. But other than that its a great start what you have listed.
Good luck man and any help just send me a message!!
Old 05-22-2014, 10:45 AM
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So took the car to street night. Working on the suspension still changing stuff around. Couldnt get the meth working right so this was just straight pump gas but ran a 9.4@145 17psi 8psi launch low timing. Not a bad start to work with
Old 05-22-2014, 12:23 PM
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Runnin mid 9's like its nothing!
Old 05-22-2014, 02:58 PM
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That's awesome Doug! I see 8 an second pass video being posted before too long
Old 05-22-2014, 07:19 PM
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How much boost are you planning on when you get all the bugs worked out?
Old 05-23-2014, 05:30 AM
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Originally Posted by Ryans99ls1
Runnin mid 9's like its nothing!
Ya man it was kind of funny I was only running that full pass because the track guy really wanted to see what it would do. I wasn't happy with it but again 7psi launch straight pump low timing and 17psi guess I can't complain

Originally Posted by Agent_Orange_Shuvel
That's awesome Doug! I see 8 an second pass video being posted before too long
Thanks man hopefully soon I got everything squared away yesterday and it is ready to do some damage!
Originally Posted by a98ws6
How much boost are you planning on when you get all the bugs worked out?
Well I figured out what was wrong. Had a cheap **** eBay map and the resolution sucked on it I should of known better. I got another dsteck map changed the parameters and the tune was almost flawless at wot and the meth is working great at low boost. But I will run 22-23psi for a bit and once it gets to the end of the year I'll crank it to 28 or whatever it Maxs out at
Old 05-26-2014, 04:27 AM
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Took the car out for an event yesterday got a first round bye because of the .001 reaction time was doing well but decided to leave early because of a fueling issue. Car ran a 9.3 1.35 60' 17 psi. Think I have either a fuel leak in bucket voltage issue or maybe a pump/pumps are tired because I could not get my afrs in check once the boost went up. So I'll staet chasing again and come back to the track in a week or so. But it's definitely showing signs of hitting 8s with 20psi max.


Old 05-26-2014, 06:46 AM
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Car is definitely doing work. Glad to see that you are getting the problems resolved one by one.


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