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Post Info TOPIC: LQ4 conversion, Take II



- Mike -
Olalla, Wa


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LQ4 conversion, Take II
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I’m nervous a little, hoping the vibration I feel when it’s running is just the header collectors moving around. Also discovered one of my heater core hoses is weeping through the rubber. It’s crazy, the whole line steams off when hot. I realized that I never replaced them and they must be 25 plus years old. Hoping they hold up for a short run time tomorrow morning.

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'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab



-Urethane Dave - Alger, WA Moderator

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If you're like me, you are being alittle hyper-sensitive to things right now. I always stress on all the little shit when starting up something new.

Tory just flew up and drove his go kart home to California. Started it up after all that time sitting next to the house, noticed it steaming alittle. Looked harder and found the plastic radiator had stress fractured along a seam, yes, plastic radiator.confuse Overnighted an aluminum one from Summit, came out of Reno, then he drove it back to 100 miles from where it came from.biggrin



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Dave P.

Resident Giant
11.44 @ 118.43




- Mike -
Olalla, Wa


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Your exactly right, I stress about everything. The heater hose issue is easy, just won’t have time to replace them till after the exhaust shop trip this morning. I’m more concerned with the vibration it has, I’ll know if it’s the headers in a couple hours.
Glad to hear Tory’s road trip is going well.

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http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab




- wondah whooooaman-
Colorado Springs


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Well, you won't feel the vibration on the way to the exhaust shop and if you feel it after the exhaust is on, its supposed to be there!biggrin



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Mark
69 Chevelle SS
"Carpe Jugulum"
"Only those who have never learned self-restraint fear reasonable discipline" T.R. Fehrenbach

http://www.chevelles.com/showroom/data/500/showpic1.jpg
http://www.chevelles.com/showroom/da...ium/motor2.JPG
http://www.chevelles.com/showroom/data/500/breakout.JPG



- Mike -
Olalla, Wa


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So, not a bad day but not a great one either. The exhaust went well, he really took the time to get it tucked up and fitting great, ran 2.5” pipe for the whole system and used nice stainless magnaflow mufflers. The nice long 20” case ones I bought ended up having the wrong inlet and outlet positions to be mounted properly, so I traded him for a pair that are shorter. Because we where concerned about that leading to it being loud and raspy, he added an H pipe. In the end it’s very well made and I’m happy with the work, but it’s almost too quiet. We where all very surprised how quiet, it’s not a bad thing, but it’s not muscle car sounding at all.

The big bummer was the short test drive. It’s not running on all eight cylinders, but not missing on the same one either. It runs rough and causes a vibration that concerns me, it feels like it’s out of balance almost, kind of hard to explain. I didn’t want to rev it up much so once around the block easily was enough. The heater hose leak is much worse too and due to the huge rake in the suspension it wonders all over the road, bad. The steering is crazy easy and very twitchy also.

Un sure what to do for now. I bought new spark plugs, heater hoses, and coolent on the way home, will have some time to work on it this Sunday. I’ve been told that these reprogrammed factory ecu’s can take a lot of time to learn and run properly. That doesn’t seem right to me but it’s possible. I still need to get new front tires one size taller, hoping an alignment fixes the drivability issues as I’m sticking with the goofy stance because I dig it. Still need to address the turning radious and the inner tie rods hitting the pan also.

It’s coming together, just not easily, but I’ll win eventually!



-- Edited by 66SSFan on Wednesday 14th of March 2018 09:56:54 PM

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab

Ben


- RAMBO -Mill Creek, WASite Administrator

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66SSFan wrote:

So, not a bad day but not a great one either. The exhaust went well, he really took the time to get it tucked up and fitting great, ran 2.5” pipe for the whole system and used nice stainless magnaflow mufflers. The nice long 20” case ones I bought ended up having the wrong inlet and outlet positions to be mounted properly, so I traded him for a pair that are shorter. Because we where concerned about that leading to it being loud and raspy, he added an H pipe. In the end it’s very well made and I’m happy with the work, but it’s almost too quiet. We where all very surprised how quiet, it’s not a bad thing, but it’s not muscle car sounding at all.

The big bummer was the short test drive. It’s not running on all eight cylinders, but not missing on the same one either. It runs rough and causes a vibration that concerns me, it feels like it’s out of balance almost, kind of hard to explain. I didn’t want to rev it up much so once around the block easily was enough. The heater hose leak is much worse too and due to the huge rake in the suspension it wonders all over the road, bad. The steering is crazy easy and very twitchy also.

Un sure what to do for now. I bought new spark plugs, heater hoses, and coolent on the way home, will have some time to work on it this Sunday. I’ve been told that these reprogrammed factory ecu’s can take a lot of time to learn and run properly. That doesn’t seem right to me but it’s possible. I still need to get new front tires one size taller, hoping an alignment fixes the drivability issues as I’m sticking with the goofy stance because I dig it. Still need to address the turning radious and the inner tie rods hitting the pan also.

It’s coming together, just not easily, but I’ll win eventually!



-- Edited by 66SSFan on Wednesday 14th of March 2018 09:56:54 PM


 Sounds all too familiar... when they've been off the road a while like to fight for a bit.

hang in there

 



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Ben R.

1968 Chevelle 300 - 454 / 4spd



-Urethane Dave - Alger, WA Moderator

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Back in when I redid the whole exhaust, I tucked the biggest Magnaflows I could into the car. Was very surprised how quiet it is, kinda like it though. Can actually have a conversation or listen to the radio if I wanted.

The ECU can take quite awhile to learn. I would not worry too much till you have a few more miles on it.

You will get it ironed out.

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Dave P.

Resident Giant
11.44 @ 118.43



- Beemer Brett - Redmond, WA

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im sure it was sill great to get on the road for a minute.  It’s been quiet a few years!  My Ls also runs pretty quiet under light load and idle. If you really open them up it seems to come alive. The misfire seems odd to me. I would think even with a base calibriation it shouldn’t misfire. Something that significant should learn right away and adjust I would think. Maybe a sticking fuel injector or coil pack.  Could use the old infrared gun trick and see if one cylinder isn’t firing? 



-- Edited by Brettd85 on Thursday 15th of March 2018 07:50:56 AM

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- Mike -
Olalla, Wa


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I was thinking an injector also, but the exhaust temps are reading the same. I would expect that hole to be low temp? Scott with the 4.8 swapped '66 GTO is using the same harness and computer and said it took several start-ups and a bunch of run time for his to run properly? What I find odd is no check engine light, it feels like a dead hole.

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab




- wondah whooooaman-
Colorado Springs


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66SSFan wrote:

I was thinking an injector also, but the exhaust temps are reading the same. I would expect that hole to be low temp? Scott with the 4.8 swapped '66 GTO is using the same harness and computer and said it took several start-ups and a bunch of run time for his to run properly? What I find odd is no check engine light, it feels like a dead hole.


Well, take the girls out for ice cream a couple of times this weekend and take it through a bunch of cycles.  Shouldn't hurt anything as long as you have good oil pressure and not overheating, right?

 



__________________
Mark
69 Chevelle SS
"Carpe Jugulum"
"Only those who have never learned self-restraint fear reasonable discipline" T.R. Fehrenbach

http://www.chevelles.com/showroom/data/500/showpic1.jpg
http://www.chevelles.com/showroom/da...ium/motor2.JPG
http://www.chevelles.com/showroom/data/500/breakout.JPG



- Shane -
Graham, WA


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if its a random misfire, i wonder if you have a cracked spark plug?

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- Durand -

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Does the new computer still use the old ODB hookup or does it have a way of accessing data?

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'65 Pontiac Lemans 468 t400 4.10 12 bolt

Best ET  11.43 @ 117.7




- Mike -
Olalla, Wa


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OBD2

its a factory early LS red/blue ecu and tune.



-- Edited by 66SSFan on Friday 16th of March 2018 08:12:51 AM

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab




- Mike -
Olalla, Wa


Status: Online
Posts: 3803
Date:
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I went out late last night and pulled the plugs, found 7 and 8 gummed up with old oil? Looked like tar, was very odd. Cleaned them all and re installed them, no difference at all. Might buy new ones, but damn they are $10. Ea

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab




- Mike -
Olalla, Wa


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Posts: 3803
Date:
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My buddy has a sonus scanner and the in-line coil pack tester and will home next Friday. I may just wait till then to look at it more.



-- Edited by 66SSFan on Friday 16th of March 2018 08:19:22 AM

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab




- Mike -
Puyallup, WA


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Posts: 2673
Date:
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Knock sensors? Just an idea.

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'67 Chevelle -- 383ci, Jerico DR4 4 speed -- 3.19 1st gearset, Gear Vendors Overdrive/Underdrive, Strange S60 w/3.54 gears

'70 Camaro -- In the works TT 6.0L, 4L80E, ??? rear end 




- Mike -
Olalla, Wa


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Had them removed

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab



- Durand -

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With it having OBDII you should be able to get live data with the right scanner.

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'65 Pontiac Lemans 468 t400 4.10 12 bolt

Best ET  11.43 @ 117.7




- Mike -
Olalla, Wa


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Date:
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Line lock is in and brakes bled, new front tires went on last night too. No about that engine running thing....

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab




- Mike -
Olalla, Wa


Status: Online
Posts: 3803
Date:
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I gave up on the mechanical water temp gauge and found an old electrical replacement on ebay that matches the existing ones. The sender and reducer bushing came last night, so I can drain the water again and replace the leaky heater hoses and install the new temp sender.

Its all little stuff I'm chasing now, should probably be more concerned with the engine running I guess, but I have faith it will be fine. Still need to align the front, really need to re center the steering and adjust the toe more than anything. Beyond that, I want to paint the trunk and figure out a speedometer of some sort.

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E (Best of 13.94 @ 101.2mph 2.07 60’)

'65 Malibu SS (Best of 10.49 @ 130mph 1.51 60')

'31 Ford 5-window model A coupe

'58 F-100 short box fleet side big window custom cab

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