Recent content by L31MaxExpress

  1. L31MaxExpress

    Ac compressor trouble

    I went with a Four Seasons 10 cylinder upgrade on my 97 Express. Could not be happier with the way it works. You could hang meat inside that van on 110F day. Whatever you do, avoid the Sanden SD7H15 with a dual evaporator system, it is completely inadequate at idle and lower engine speeds.
  2. L31MaxExpress

    Keep Manifolds or get shorties?

    I never did an A to B dyno test, but removing the manifolds and putting direct fit shorty headers improved my fuel mileage and added enough torque to keep my van in overdrive up grades it previously downshifted to 3rd gear going up. With the 4L60E and 3.42s at the time it was only turning 1,950...
  3. L31MaxExpress

    Keep Manifolds or get shorties?

    There are two things that need to come back around for street performance for SBC and LS engines. A dual plane MPFI intake manifold and tri-y headers. Now that I have combined both on an otherwise fairly mild L31 350, it absolutely gets it. The Mercruiser SBC Vortec dual plane MPFI manifold...
  4. L31MaxExpress

    Keep Manifolds or get shorties?

    Tri-Ys make a definite difference. My first experience with them was adding a set of SLP Tri-Ys to a 1990 Camaro LB9/5spd. HUGE difference in useable torque with that car. It went from running 13.90s @ 101 mph to 13.30s @ 104-105 mph. Running tri-ys with a single exhaust using a nice merge Y...
  5. L31MaxExpress

    305 Vortec Cam

    That was back in the old FSC days, I remember a cammed 5.0L Vortec 5spd back then, IIRC may have been a maroon truck. With a 5spd 305 Vortec I would probably run an 08-502-8 myself. The 08-502-8 is similar to a LT4 Hotcam but makes a bit more torque.
  6. L31MaxExpress

    L31 Extreme Budget Build

    It is straight up bad, if I could fix the base tune like Holley or the old Accel systems it would be done. Scre Edelbrocks little calibration hand held on the older system or the app for your phone on the newer systems. It is nearly worthless for an experienced tuner. If it were a TBI computer...
  7. L31MaxExpress

    L31 Extreme Budget Build

    I swapped to the 5009 map this morning as planned, the 58 psi map. Fueling is closer but still too rich during cranking and warmup. I have as much fuel as can physically be pulled out of both the cranking fuel and after statup enrichment but it is still too much fuel. I am throwing a 195F...
  8. L31MaxExpress

    L31 Extreme Budget Build

    That is my problem right now, that happy pedal feels darn good and sounds even better.
  9. L31MaxExpress

    Keep Manifolds or get shorties?

    Manifolds are garbage, shorties are noticeably better. I have never seen long tubes cause a condition that would hurt an engine and I have tuned dozens of engines with them. Even these performance 2.5" outlet manifolds ended up coming off my latest build. Headers are better everywhere on power...
  10. L31MaxExpress

    Keep Manifolds or get shorties?

    Look like 3rd gen Camaro/Firebird or 80s G-body headers to me.
  11. L31MaxExpress

    Well, that was unexpected!

    The cat may in fact be empty of its guts. They could be residing inside your muffler.
  12. L31MaxExpress

    L31 Extreme Budget Build

    I think it was a display model. It had never been bolted up to anything. I will run the PF4 throttle body, it is a really nice piece. It has a GM TPS and what looks like a GM IAC. Will need to investigate the MAP voltage readings and calibrate the map values for the GM PCM and find a matching...
  13. L31MaxExpress

    L31 Extreme Budget Build

    I am going to try a different base fuel map later and play with the idle throttle opening screw. The PF4 ECU has me ready to order a DBC LS swap harness, yank the PF4 ECU and harness and throw it all up on ebay along with the single plane intake that is already not being used. It is giving me...
  14. L31MaxExpress

    L31 Extreme Budget Build

    A piece of brake lathe silencer that had apparantly fallen in the tail pipe while it sat around for years.
  15. L31MaxExpress

    L31 Extreme Budget Build

    It did not change the sound outside much but all the difference in the world in interior cabin noise. Never have been a fan of axle dumped exhaust even under the bed of a truck. I just put those on to keep from baking the rear axle and this is now the way I wanted it. I ended up doing the 45*...
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