Went to the track

Discussion in 'Performance' started by JDopirak, Sep 11, 2019.

Sponsored By: Black Bear Performance
  1. R3cord303

    R3cord303 Posse In Effect

    Posts:
    555
    Likes Received:
    597
    Joined:
    Feb 28, 2019
    Location:
    Oregon Valley
    Name:
    Allen
    Can 3.42 vs 3.73 cause that large of a whp difference? You have headers and a full exhaust with the same cam as me. I've only got the cam and a cat delete as far as performance mods...
     
  2. gooffeyguy

    gooffeyguy Full Access Member

    Posts:
    977
    Likes Received:
    969
    Joined:
    Apr 11, 2018
    Location:
    St. Louis
    Name:
    Tom
    Gears won't change/add/remove HP

    2001 Yukon SLT
    2012 Yukon Denali XL
    2011 Yukon Denali RIP 5/20/18
     
  3. JDopirak

    JDopirak TYF Newbie

    Posts:
    29
    Likes Received:
    17
    Joined:
    Mar 26, 2019
    Name:
    joe

    Your %100 right which is why I'm trying my hardest to do some research before I buy stuff. I know a guy who just slaps all kinds of random stuff at his car and wonders why it doesnt run like he thought it should.

    And I agree I really really thought it would be in the 15s the truck feels great so I was shocked when it wa so slow. But I did everything right. The only thing I can think is the trans is holding me back I've always thought the trans felt weird it got "tight" as the night went on even after I let it sit and cool down for 30 min. It just didnt want to move as quickly. The max temp was 185ish with my trans cooler.

    I took it to two trans shops and they both said it's a perfectly fine running 6l80e thst they are just clunky in general in these types of trucks and the 2-3 odd shift is normal especially in the earlier years like mine. I had a friend who owns a 2010 tahoe drive it and he said it feels better than his trans. So I guess it's in my head.
     
  4. JDopirak

    JDopirak TYF Newbie

    Posts:
    29
    Likes Received:
    17
    Joined:
    Mar 26, 2019
    Name:
    joe
    Sorry for the confusion. I currently only have intake,shorty headers,muffler,resonator delete and a tune. And it made 268 hp.

    I'm installing the cam and porting heads over the next two months.
     
  5. swathdiver

    swathdiver Full Access Member

    Posts:
    8,545
    Likes Received:
    7,098
    Joined:
    May 18, 2017
    Location:
    Treasure Coast, Florida
    Name:
    James
    I thought mine would have been a little faster too. Some of the magazine reviews had the same or similar setup running the same or a little faster. In my case, I chalk that up to the All-Terrain tires sticking to the track like flypaper. My transmission temps rose as well as one might expect. At first I just shut the truck off but the temps were still similar to yours after 45-60 minutes. Next time around I idled the truck to bring the temps down and also commanded the fans to run on high which worked more quickly.

    When your truck was tuned, did they also do the transmission? What Justin did for transmission performance is my favorite part of the tune.

    Forgive me here if I'm preaching to the choir. When modifying any vehicle, it's vitally important to do a baseline series of runs in stock configuration and then do ONE modification at a time and test it. It's a great temptation to do more because of the time and cost involved in heading to the track or scheduling dyno time. This can be even more frustrating when their are problems at the track that limit runs or affect your ability to make consistent passes. But it must be done to identify the stuff that doesn't work.

    When the Hoosier drag radials first came out, I had to have a pair. Picked up a set of spare wheels and mounted these new tires to them. The car felt great on launches, even snatching the left front tire off the ground. The ETs came down but because of the rollout of the tire, MPH was lost and therefore horsepower to the pavement. They were smaller and should have been the same, 5 inches of rollout difference from my skinnier tires. I left them on though for street racing and put a 9" converter in the car next. Again, the car felt great and got more air under that tire at launch but she went even slower! Dropped the transmission and put my old converter back in and the drag times were restored. I used that information to have my factory converter modified for just another 300 rpms of stall speed, not 500-800 like EVERYBODY else was suggesting. Then the new BFG Radial T/As came out (same tire as today) and I put those on in the same size I was using previously and went even faster. I could get a faster 60-foot with a 235-60-15 Radial T/A versus the Hoosier's 275-50-15!

    I've never driven or raced my truck with the original tires on it, it has always had all-terrains since purchase. Reckon I should put a tape measure to the spare and compare that to the KO2s and see what the actual rollout on both are. The truck was tuned specifically for the OE tires.

    I'm excited to see how your heads and camshaft will work, I would like to do those mods to mine someday too.

    Oh, what fuel were you running? My runs were on E85. I think next time it will be on gasoline just to see the difference.
     
    kbuskill likes this.
  6. R3cord303

    R3cord303 Posse In Effect

    Posts:
    555
    Likes Received:
    597
    Joined:
    Feb 28, 2019
    Location:
    Oregon Valley
    Name:
    Allen
    ahhhh got it. Thank you
     
  7. JDopirak

    JDopirak TYF Newbie

    Posts:
    29
    Likes Received:
    17
    Joined:
    Mar 26, 2019
    Name:
    joe
    So I have to ask how is it daily driving with the cam?

    Is it choppy?
    I can find videos online but it's all 112lsa or 111lsa.

    Also did you do a stall converter to go along with the cam?
     
  8. Mickey_7106

    Mickey_7106 Full Access Member

    Posts:
    157
    Likes Received:
    74
    Joined:
    Oct 22, 2018
    Location:
    Bay Area
    Name:
    Mickey
    i had a Circle D 2800 stall on my C5 and loved it! i took a lil time to get used to on the street. Hills were a challenge from a stop or low speeds at times mostly from the person behind me being too close but after a while you calibrate your foot to compensate.

    im planning on doing an AFM delete kit and will definitely work with Circle D again.



     
    swathdiver likes this.
  9. R3cord303

    R3cord303 Posse In Effect

    Posts:
    555
    Likes Received:
    597
    Joined:
    Feb 28, 2019
    Location:
    Oregon Valley
    Name:
    Allen
    Daily driving is fine as long as you’re tuned well. I had to drive around all day after it was installed to burn out all the 87 so it could be tuned for 91.

    When you’re idling in park it does chop a fair bit and will rock the vehicle back and fourth.

    Right now I’m chasing an issue with idle, if you let it idle long enough the computer will think its missfiring and turn off stabilitrack until you put it in gear. Several things can fix that based on what I’ve read- bigger gap in spark plugs, or dialing in the tune a little more.

    And for the stage 1 and stage 2 cams you don’t need a high stall converter. Texas Speed says for stage 3 you do.

    Overall, 10/10 for the cam.

    Edit for clarity- no I did not do a high stall converter. Only things done to the tranny are a shift kit and a vette servo and maybe a sunshell? It was rebuilt when the vehicle was at 130k. I bought it at 216k.
     
  10. swathdiver

    swathdiver Full Access Member

    Posts:
    8,545
    Likes Received:
    7,098
    Joined:
    May 18, 2017
    Location:
    Treasure Coast, Florida
    Name:
    James
    Did you ever run it at a drag strip Allen?
     

Share This Page