I've read bits and pieces about your G-vans for years...but this is first thread I've seen. haha
What kind of heads on the 383? It sounds pretty similar to the one going in my Camaro.
I've read bits and pieces about your G-vans for years...but this is first thread I've seen. haha
What kind of heads on the 383? It sounds pretty similar to the one going in my Camaro.
80 Camaro Z28 - 550hp AFR 383 / T56 6spd (Holley HP EFI)
91 Beretta "SS" - 260hp 3400 MPFI / HM282 5spd (7730/$A1) sold! for crazy money...but I miss it
94 Silverado Z71 - 300hp Vortec 357 TBI / NV4500 5spd (7427/$0D) gone but not forgotten
96 Beretta "T56" - 4.8 LS RWD swap / 6spd (0411/2156)
01 Silverado 2500HD - stock Vortec 8.1 / ZF6 6spd (0411/8322)
https://www.youtube.com/c/GEARHEADdezign
Another question- perhaps answered somewhere else, what do you see as a high value w good efficiency (regardless of dollars spent) torque converter supplier for a 4L60E 2200-2400 stall, 383 non oem tuned port 350rwhp/400tq?
Ended up going back to a ported stock intake with an AUS 48 lb/hr spider. Put the smaller cam back in a while back too. Just changed out the muffler and tailpipe. Dual 3" in Walker quiet flow muffler and matching 4" tailpipe for an 01-06 3500 HD with a 6.0L or 8.1L fit my van like it was made for it. To me it is very quiet for a 500 hp engine and a bit of a sleeper now.
https://youtu.be/zJBiw3xkiYY
https://youtube.com/shorts/bq8CAvqnubU?feature=share
I also swapped a P59 Green/Blue into it a while back. First fireup after the 383 went back in on the Mexican 2005 L31 GMT800 file base tune with injector size, displacement and MAF edited. Had to do a good bit more tuning. Torque management was pulling a ton of timing out of it. Open headers so it is nice and crackley.
https://youtu.be/FzEDpuSIwJc
Idling with a 4" MAF.
https://youtu.be/iEn1Ht6Ta-s
Testing the 6,200 rpm rev limit open cutouts.
https://youtu.be/J4v4Z9rAKio
Last edited by Fast355; 04-15-2022 at 09:15 AM.
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