It's because of the mounting bracket for the Motion billet valve covers. The LQ4 one is the 3rd from the left, you can see the plug wire would have to be about an inch longer than any of the other styles.
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
The coils I have were on the lq4 I put in my blazer, when I google which ones came stock it shows both styles. I have a set of the round ones, but I snagged those off a newer truck.
The coils you have aren't in that picture either because they have the side mount tabs and require a different bracket.
Does this bottle make my toolbox look small?
We had another good night at the track last night. I still need to pull the plugs after the last run, but we have a tune for a 350hp shot now.
I forgot my laptop, so Amber had to run home while I was going through tech and she was parking the Silverado as I made the first pass so there's no video.
First Run: 250hp jets installed, nitrous now comes on progressively for .5 seconds and goes to 100% for 6.5 more seconds and cuts off after 7 seconds of spray, 12° of timing pulled, 12:1 target AFR while spraying.
60' - 2.434 - Nitrous pressure was too high and the solenoid didn't open right away, the truck surged majorly off the line until the nitrous came on.
330' - 5.845
1/8 - 8.470@94.18 - New PB trap speed!
1/4 - 12.895@106.60
Second Run: We just checked the data and got back in the lanes, no changes.
RT - .043 - New PB (the only reason I posted this, my RTs are all over the place because I keep changing things)
60' - 1.982 - Aggressively purged the nitrous to prevent the previous issue.
330' - 5.088
1/8 - 7.671@94.86 - New PB trap speed!
1/4 - 12.125@105.79
Third Run: Data and plugs looked great, swapped in the 300hp jets, left the #9 plugs. dropped target A/F to 12:1 while spraying (not counting ethanol modifiers), Reduced total nitrous on time to 6 seconds, 14° of timing pulled.
60' - 1.797 - Best 60' since the regear and bigger tires!
330' - 4.819 - New PB!
1/8 - 7.477@89.94 - My trap speed dropped because the nitrous cut off 1 second earlier.
1/4 - 12.149@101.14
Fourth Run: Data looked good but #7 and 8 plugs were missing their ground straps
. I talked to someone from the speed shop I get my nitrous from and made some changes. 350hp jets went in, pulled 17° of timing, 11.5:1 target AFR, 10% additional fuel and 1° additional timing retard to #7 and 8.0, also nitrous run time was dropped to 5 seconds total.
60' - 1.766 - Best 60' since the regear and bigger tires!
330' - 4.713 - New PB!
1/8 - 7.278@92.59 - New PB ET!
1/4 - 11.885@101.89
When the nitrous comes on on the 350 jets, it's amazing. The front end is definitely getting light at this point, not sure if a tire lifted or not as I haven't watched the videos yet. Unfortunately as exciting as it is when the nitrous comes on, it's equally disappointing when it shuts down and I lose 40-50% of my power. I'm glad I cut it down to a 5 second spray or we would have definitely gone quicker than an 11.5. If I spray through the 1/8th I'm guessing I'd be in the 6's at over 100mph. Maybe we'll try that next time when Amber's driving, she'll just have to let off after the 1/8th so she doesn't go too fast.
Amber is still sleeping so I don't have the video's yet, I'll try to get them posted later today.
I forgot my laptop, so Amber had to run home while I was going through tech and she was parking the Silverado as I made the first pass so there's no video.
First Run: 250hp jets installed, nitrous now comes on progressively for .5 seconds and goes to 100% for 6.5 more seconds and cuts off after 7 seconds of spray, 12° of timing pulled, 12:1 target AFR while spraying.
60' - 2.434 - Nitrous pressure was too high and the solenoid didn't open right away, the truck surged majorly off the line until the nitrous came on.
330' - 5.845
1/8 - 8.470@94.18 - New PB trap speed!
1/4 - 12.895@106.60
Second Run: We just checked the data and got back in the lanes, no changes.
RT - .043 - New PB (the only reason I posted this, my RTs are all over the place because I keep changing things)
60' - 1.982 - Aggressively purged the nitrous to prevent the previous issue.
330' - 5.088
1/8 - 7.671@94.86 - New PB trap speed!
1/4 - 12.125@105.79
Third Run: Data and plugs looked great, swapped in the 300hp jets, left the #9 plugs. dropped target A/F to 12:1 while spraying (not counting ethanol modifiers), Reduced total nitrous on time to 6 seconds, 14° of timing pulled.
60' - 1.797 - Best 60' since the regear and bigger tires!
330' - 4.819 - New PB!
1/8 - 7.477@89.94 - My trap speed dropped because the nitrous cut off 1 second earlier.
1/4 - 12.149@101.14
Fourth Run: Data looked good but #7 and 8 plugs were missing their ground straps
. I talked to someone from the speed shop I get my nitrous from and made some changes. 350hp jets went in, pulled 17° of timing, 11.5:1 target AFR, 10% additional fuel and 1° additional timing retard to #7 and 8.0, also nitrous run time was dropped to 5 seconds total.60' - 1.766 - Best 60' since the regear and bigger tires!
330' - 4.713 - New PB!
1/8 - 7.278@92.59 - New PB ET!
1/4 - 11.885@101.89
When the nitrous comes on on the 350 jets, it's amazing. The front end is definitely getting light at this point, not sure if a tire lifted or not as I haven't watched the videos yet. Unfortunately as exciting as it is when the nitrous comes on, it's equally disappointing when it shuts down and I lose 40-50% of my power. I'm glad I cut it down to a 5 second spray or we would have definitely gone quicker than an 11.5. If I spray through the 1/8th I'm guessing I'd be in the 6's at over 100mph. Maybe we'll try that next time when Amber's driving, she'll just have to let off after the 1/8th so she doesn't go too fast.
Amber is still sleeping so I don't have the video's yet, I'll try to get them posted later today.
Just for fun I looked at my logs from the last run, based on driveshaft speed (which should be fairly accurate) and correcting for my 28" tires (normal tires are 28.9" tall) I did 0-60 in just under 3 seconds!
I haven't had a traction issue yet, there are people doing low 6 second passes on 275 radials now.So.....
When is it getting back halved to make room for the 18" wide stickys
It has to be difficult not to turn it up and run under 11.5. I commend you for the restraint.
I honestly have no idea what they'd do if I ran too fast. Most of the staff there recognize me (for obvious reasons) and all really like the truck. I wouldn't want to sour that relationship, but honestly I'm not sure what would happen.
That being said, I'll not be restraining so much at Duct Tape Drags, I don't think they'll care. I'm pretty sure the 9 second car that wins every year doesn't have a cage.
I am seriously thinking about a simple roll bar that would allow me to go 10's though.
Well, I don't know what the f*ck is wrong on cylinder 8 but it completely destroyed the spark plug, worse than anything before and the cylinder is now down about 15psi on a compression test. We're going to pull the head tomorrow and see how bad it is.
weak injector?
down 15 isn't awesome
I don't think it's the injector, the first time this happened I was on the old injectors and it was a similar story. 7 decent looking plugs, one destroyed.
Amber and I have spent the last few hours trying to think about why this happened, lot's of google and forum searches. I'm going to make some calls and forum posts, but here is my current theory.
First, I want to post this link: https://www.yellowbullet.com/thread...020&nested_view=1&sortby=oldest#post-74670020
Just over 2 weeks ago, Induction Solutions posted this on Yellow Bullet forums, I bought this nitrous plate in December 2024 and this is the first time they've marketed it on Yellow Bullet. I had no idea this was a brand new product and I was one of the first adopters...
This plays into my theory as this hasn't likely been thoroughly tested in the real world. the Dri Ram plate has nozzles that spay nitrous towards each of the ports on the Holley High Ram, but if the valve is closed that nitrous is going to bounce back into the plenum. At the front of the engine, this isn't a big deal, but the farther back you go the more nitrous is in the air charge and the leaner your cylinder is going to be until you get to the last cylinder and that could be highly concentrated with nitrous and is also getting it's own 350 shot...
I'm welcome to hear other theories, but it seems to me that the design of this nitrous plate is going to make the rear cylinders much leaner than the fronts. I'm thinking we need to run a smaller jet on the back (the plate is fed from the front and back and doesn't cross over in the middle). I'm going to talk to the guys at Induction Solutions and post up on some other tuning forums, but that's the best I can come up with.
We're just hoping we didn't hurt the engine too bad and maybe just need a new valve and seat. We'll know more on that tomorrow.
First, I want to post this link: https://www.yellowbullet.com/thread...020&nested_view=1&sortby=oldest#post-74670020
Just over 2 weeks ago, Induction Solutions posted this on Yellow Bullet forums, I bought this nitrous plate in December 2024 and this is the first time they've marketed it on Yellow Bullet. I had no idea this was a brand new product and I was one of the first adopters...
This plays into my theory as this hasn't likely been thoroughly tested in the real world. the Dri Ram plate has nozzles that spay nitrous towards each of the ports on the Holley High Ram, but if the valve is closed that nitrous is going to bounce back into the plenum. At the front of the engine, this isn't a big deal, but the farther back you go the more nitrous is in the air charge and the leaner your cylinder is going to be until you get to the last cylinder and that could be highly concentrated with nitrous and is also getting it's own 350 shot...
I'm welcome to hear other theories, but it seems to me that the design of this nitrous plate is going to make the rear cylinders much leaner than the fronts. I'm thinking we need to run a smaller jet on the back (the plate is fed from the front and back and doesn't cross over in the middle). I'm going to talk to the guys at Induction Solutions and post up on some other tuning forums, but that's the best I can come up with.
We're just hoping we didn't hurt the engine too bad and maybe just need a new valve and seat. We'll know more on that tomorrow.
Weird things happen in an intake. This has been proven with individual cylinder O2 sensors. It sucks that you are unknowingly BETA testing their system.
Latest Posts
-
-
'99 4 Door Tahoe SAS Build, Taking it back a few years- Latest: ktmoutfront
-
-
