My HMT 78 Chevy Monte Carlo
#91
Re: My HMT 78 Chevy Monte Carlo
Originally Posted by Cadracer
Damn i love it.I tell you what i have the 650dp already setup for 18 psi boost you send me a carb and ill swap you.The fuel pump you need to get it the super pump.It will pump the amout of fuel needed and it mechanical.Let me know if theres anything you need on tunning aspect i have pushed the sbc to the limits to melting 3 pistons and burning the electrodes off the pluggs.I miss the boost.
#93
Re: My HMT 78 Chevy Monte Carlo
Originally Posted by SDRAWKCAB
I did not know that.
I change my mind every time i have a different engine sitting in my back yard.
I haven't found a clean 350 worth building and the 4.3 is minty fresh.
BUT knowing that, i think i resume the search for a good 350.
JD your car knowledge far surpasses anyone iv ever met or known.
good info and once again you weirded me out with how much you know.
THANKS
I change my mind every time i have a different engine sitting in my back yard.
I haven't found a clean 350 worth building and the 4.3 is minty fresh.
BUT knowing that, i think i resume the search for a good 350.
JD your car knowledge far surpasses anyone iv ever met or known.
good info and once again you weirded me out with how much you know.
THANKS
#94
Re: My HMT 78 Chevy Monte Carlo
I'm looking for suggestions. I've spent some time messing with the carb jetting. The car pulls like a raped ape, but watching the wideband, it leans out on the top end. Currently, I'm still running the mighty demon but with a mallory 4309 fuel pressure regulator. I've played with the jets and where it runs it's absolute best is with the current combo of 74 jets in front, 99 in the rear. I've drilled the PVCRs to .078. The carb still has the stock .110 needle and seats.
I tried making the high speed air bleeds smaller but the car still leans out at over 10lbs of boost. I'm running 32 degrees timing with the msd btm pulling 2 degrees per lb of boost giving me a total of 17 under full boost. I'm running the walbro inline 255lph fuel pump using the monte's stock pick up. It's wired right with 10 gauge wiring and a 30 amp relay.
When I restricted the high speed air bleeds, it did run richer in the mid range, but it stilled leaned out according to the ngk afx wideband. I've received advice from the V8 forum to try bigger needle and seats. I am going to try that because because it couldn't hurt. I'm looking for any other suggestions.
I want to make my current set up work without spending alot of money. I'm so close to 11 second glory I can taste it. This car would almost be done if all I wanted to do was run 10lbs of boost, but after feeling the 15lbs, I know that is what I need.
I tried making the high speed air bleeds smaller but the car still leans out at over 10lbs of boost. I'm running 32 degrees timing with the msd btm pulling 2 degrees per lb of boost giving me a total of 17 under full boost. I'm running the walbro inline 255lph fuel pump using the monte's stock pick up. It's wired right with 10 gauge wiring and a 30 amp relay.
When I restricted the high speed air bleeds, it did run richer in the mid range, but it stilled leaned out according to the ngk afx wideband. I've received advice from the V8 forum to try bigger needle and seats. I am going to try that because because it couldn't hurt. I'm looking for any other suggestions.
I want to make my current set up work without spending alot of money. I'm so close to 11 second glory I can taste it. This car would almost be done if all I wanted to do was run 10lbs of boost, but after feeling the 15lbs, I know that is what I need.
#97
Re: My HMT 78 Chevy Monte Carlo
Extend the vent tubes. Go to the turbo forumns and search for vent tube extensions. It will rich the car up alot and you will drop a lot of jet sizes. Other than that make sure fuel pressure is rising on a 1 to 1 ratio with boost.
#98
Re: My HMT 78 Chevy Monte Carlo
Originally Posted by c0mpl3x
get a bigger main body.
Originally Posted by 79fairmont
Extend the vent tubes. Go to the turbo forumns and search for vent tube extensions. It will rich the car up alot and you will drop a lot of jet sizes. Other than that make sure fuel pressure is rising on a 1 to 1 ratio with boost.