Jump to content

72 LS5

(Non-dues paying)
 View Profile  See their activity

  • Posts

    441

  • Joined

  • Last visited

  • Days Won

    4

 Content Type 

Posts posted by 72 LS5

    carb stumbles

    in Modifiers

    Posted

    I suspect that you need to get the accelerator pump cam kit along with a large squirter.  Then you can pick a pump cam with the steepest ramp just off idle.  You may have to mess with the number 1 or number 2 screw positions for the cam.  When installing a new cam, be sure to take any slack out of the pump arm so it barely rests on the cam (with the adjustment nut over the spring of the arm).

     

    Have a look at this pic with the cams all lined up and the difference in profiles.

     

    BUT, before that, be sure your initial timing is set properly.  Many an engine has stumbled or been sluggish with not enough initial timing.  I used to run about 12-14 initial and about 36 total on my 454.  Vacuum advance helps off idle as well.

     

    That manifold should run well with the peanut port, as long as its made for the peanut port heads and not 0val ports?  Can't imagine why there's not torque.  Check firing order, vacuum leaks, and basic stuff - sometimes something gets overlooked.

    post-223-0-66042800-1440442377_thumb.jpg

    What did you do to your Monte Carlo today?

    in General 70-72 Monte Carlo Forum

    Posted

    MonteTrans_zpsbnzbfhqi.jpeg

     

    Since I stubbornly refused to remove my headers to get the trans back in, I bought a tilting trans jack.  You think I was able wheel this thing under the car like this?  No way.  Had to slide the trans and jack individually under the car, then get the trans up on the jack under the car.  Twice (converter wouldn't seat).  What a pita, but its in now.  Waiting on 3 more qts of Amsoil before I can test it out!  Can't wait.......

    Smoked the trans last weekend

    in Modifiers

    Posted

    Doug - thanks a lot for the details!  $1600 is a lot less than I suspected.   The 4L80 is the only overdrive I'd consider other than a gear vender.  I will definitely be looking into that now.

     

    The OD is nice, but most of my driving is bopping around town.   The 3.31s are great for that.   Maybe I would do more highway if I had the OD....dunno....but I have the Challenger with the 6-speed for that kind of travel.

     

    Since the 4L80 is longer, the driveshaft would need to be shortened.  What about the speedo gear?

     

    Thanks

    Mike

    Smoked the trans last weekend

    in Modifiers

    Posted

    :hijack:   interesting story there, WOW!

     

    Sorry to hear of your smoked trans Mike, looks like its your turn for some slithering. My two sons are burnout junkies after taking them with me to Woodward last summer. Cant go anywhere now without them hounding me to do a burnout. Its so hilarious hearing my 3 year old say "do a burnout daddy".  Last time I had second gear was just before a good burnout they talked me into (Im pretty easy to give in) its not really what smoked my trans, but it definitely helped pull the plug on the dying patient. Unfortunately it was not giving me any indication of trouble, kinda weird deal. Oh well, problem fixed for $300 and a bunch of my time/labor and she's go to go again.

     

    Cory - a good burnout is fun for the whole family!  We never outgrow it.   I posted this burnout a few years ago.....started slow, but floored it about 50 yards out: 

     

    Great story Doug!   So hard not to take revenge for something like that, but they will get theirs......

    You say you have the 4L80 - what would you say the typical conversion from a 400 would cost?  soup to nuts.........

    Smoked the trans last weekend

    in Modifiers

    Posted

    That sucks about the trans but who won??!!!

     

    Heh - its usually pretty close only scuffling from like 60-85 or so, but in a 1/4 mile, I think I'd spank him pretty good.  He's got a 454 with a 5-speed - super nice car.

     

    David and Doug - thanks for the input.   I think the plan is to rebuild locally and get an aftermarket converter.  My current converter is actually a locally built unit.  I don't know much about Freakshow but I betcha I can dig up a bunch of stuff on the Chevelle board.

     

    Thanks!

    Mike

    Smoked the trans last weekend

    in Modifiers

    Posted

    That's what I get.........just hours before I was shooting my mouth off how I haven't had the trans rebuilt since 1994 (about 60k ago). 

     

    Coming back from a car show Sat night my buddy pulls next to me on I95 in his 69 Yenko Chevelle clone......we did a few 60 - 85 mph WOT passes and then second gear wouldn't hold anymore.  It downshifts to 2nd and redlines every time I floor it.

     

    Anyhow, I'm probably going to pull it and have the same guys rebuild it.  It would be a great time to go overdrive, but with the limited amount of highway use and my 3.31 gear, I really don't think its worth the money or added complexity.

     

    As far as converter, I like a mild converter, but also want something efficient at the top end.  Coan has gotten good reviews here, but would it be worth it for me as I only want a 2500 stall speed?

     

     

    manifold swap

    in Modifiers

    Posted

    I'm running the air gap rpm as well with a drop base and a 3.5 element.  No issues.  The 3.75 element would barely brush against my hood with no hood insulation.

     

    For my hood clearance test, I take make a loose ball of tin foil and put it on the air cleaner (play doh works too) and close the hood to the first latch, make a visual inspection, then close all the way.

     

    I love the WIX racing filters as you can get them in 1/4 inch size differences to fine tune the biggest element that will fit under your hood.

    Big motors.. what mufflers are you running?

    in Engine Tech

    Posted

    Originally Posted By: Sam (Bones)
    I had!!! the pypes race pros after the second!!! set had the baffles break and start rattling, I went to flow masters

     

    aren't you in Novi?, maybe we could meet and you hear my exhaust

     

    Wow Sam sorry you had a bad experience with the Race Pros. I have had a set on my car for 3 years and all is good. 14" case 3" inlet outlet. Although not a big inch engine it is ok for a pump gas s/b. The x-pipe helps quiet it down.

     

    Borlas would be a good choice although a little heavy on the wallet.

     

    David

     

    Sam - I hope Pypes has fixed that problem! I have the Race Pros as well (3" system) and am very happy.....so far....

    Resonably quiet, no drone, sounds great.

×
×
  • Create New...