Do I need a retune
Thread Starter
Teching In
Joined: Sep 2021
Posts: 4
Likes: 0
Do I need a retune My car had a stock bottom end LS1 with mild cam, 40lb injectors, and rear 02/EGR delete for headers. That engine was a fresh rebuild and it bent an intake valve in cylinder 1 after 500 miles of light driving. I swapped it with bone stock LQ4 kept the stock block, heads, and cam. I used the headers and 40 lb injectors as they are compatible. So I have stock LQ4 with 40lb and headers. I have started the car many times and it runs and idols good. Do you think I need to get a retune to go for a spin or would I be fine taking it for a drive around the block. If you suggest a retune, where would you suggest I take it to get tuned in eastern PA if you know of any places Im open to suggestions thanks.
TECH Fanatic
Joined: Jan 2022
Posts: 1,034
Likes: 468
From: Seattle
Did you get a diagnosis on the bent valve?
LQ4's came with 24# injectors so you should be ok with the 40's, room to grow, and If it idles fine with a larger injector, thumbs up. What are you plans for the car? (what car is it by the way?)
LQ4's came with 24# injectors so you should be ok with the 40's, room to grow, and If it idles fine with a larger injector, thumbs up. What are you plans for the car? (what car is it by the way?)
On The Tree
Joined: Jul 2009
Posts: 151
Likes: 5
From: GA
everything benefits with a good tune, but if its running now youll be fine. Probably just a bit rich than most prefer. A remote/mail in tuner would be able to do it if you cant find a reputable tuner in your area.
Thread Starter
Teching In
Joined: Sep 2021
Posts: 4
Likes: 0
No, found there was Zero compression in cylinder 1 tore motor apart and found valve was bent was obvious markings on piston. I was shocked considering LS engines do not typically bend valves. Would too large of a cam cause this?
Car is a 2001 Camaro ss black 6 speed convertible. I bought the car from some idiot it was a fresh rebuilt LS1. Was cruising on country road and out of nowhere it bends the valve. It sounds stupid but I swear I was just driving and the car shut off. Long story short I bought an LQ4 out of a 3500 express van from a u pullit for 400 reused most of the new gaskets and parts from the ls1 and here we are. She runs well I am pleased with the results. I have everything done except I cannot get the clutch to bleed on the t56. Very frustrating.
Car is a 2001 Camaro ss black 6 speed convertible. I bought the car from some idiot it was a fresh rebuilt LS1. Was cruising on country road and out of nowhere it bends the valve. It sounds stupid but I swear I was just driving and the car shut off. Long story short I bought an LQ4 out of a 3500 express van from a u pullit for 400 reused most of the new gaskets and parts from the ls1 and here we are. She runs well I am pleased with the results. I have everything done except I cannot get the clutch to bleed on the t56. Very frustrating.
