Recent content by JeremyNH

  1. J

    383SB or 400SB retro into a L31 1998 Suburban

    390 is what I have newly installed this Spring. You need to go 0.040 over to get there though. Standard 383 overbore with a 3.8" stroke gets you to 388. In any event although the Dart block is more expensive than an L31 stroker the spread is likely less than you think. Reputable machine shops...
  2. J

    Problem with temperature gauge

    Something to consider is that the temperature gage and the ECM use different sensors. The ECT to ECM is the two wire sensor near the Tstat and the sensor to temp gage is one wire sensor in the drivers side head. Put a scanner on as you drive around and see if the ECM is reading fluctuating...
  3. J

    Need help, where does this 2 wire plug into?

    EVO (electronic variable orifice) only affects power steering. At higher speeds it reduces the hydraulic pressure to the gearbox theory being the truck would be easier to control on the highway. Only some models had EVO. Mine did but I removed it when I swapped to hydroboost brakes. Some people...
  4. J

    Need help, where does this 2 wire plug into?

    It's the EVO circuit that goes to the back of the PS pump. Given what EVO is and some folks opinions on it it may have been disconnected intentionally.
  5. J

    Info on 5.7L marine intake swap

    My marine intake came off a 2005 Mercruiser with a 305. I'll list what I did which worked as I've had it on two motors over the last four years without leaks or codes. It presently sits atop my 390 stroker. I'm not saying mine is the only or best way to do it only that it worked for me. First...
  6. J

    4l80e Flexplate 3 or 6 bolt?

    7/16 is a substitute for M10 using SAE bolts in flanges with metric holes in most substitution tables. The fastener higher torque of the crank bolts increases the strain taking them closer to yield not further from it. You may be right on the standard grade difference but just use ARP fasteners...
  7. J

    4l80e Flexplate 3 or 6 bolt?

    Not for nothing but you don't need six bolts at the TC. Not ever. The bolt circle at the torque converter has pretty much exactly 3 times the distance to centerline that the bolt circle at the crank. Mechanical advantage being what it is means that the force at the TC bolt circle is 1/3 that of...
  8. J

    4L80 swap tips and tricks.

    I just went to the tune repository. There is only one tune for the 2002 van and it is for a 5.7L/4L80e (1249079920). The 4Lo shift points are not enabled. I also have the tune for the 2002 Silverado 6.0L 4x4 that does have 4Lo shift points. I checked and they both have the same OS so you could...
  9. J

    Budget 383 vortec sleeper build.

    My stroker uses a Scat 4-350-3800-5700-L (same as the HT383), KB 164-40 pistons, and Eagle CRS6000BST connecting rods for a compression height of 9.030" so was expecting to be 0.005" proud. Actual deck clearance was (in the hole): 1 0.015 2 0.006 3 0.006 4 0.004 5 0.007 6 0.008 7 0.008 8...
  10. J

    JB Weld on accessory bolt studs in aluminum heads?

    Decided to go with Time-sert. Using a spare 3/8-16 bolt, some white out, and digital calipers I marked exactly 0.501" of thread depth in the bracket holes. These are AFR 912s so should any follow me with them when they mention in the install instructions to clip the accessory bracket bolts...
  11. J

    JB Weld on accessory bolt studs in aluminum heads?

    Yeah, if I was smart I would have replaced them before I tried to install the shortened bolts. But since I'm not I didn't have the thought until after. $5 and 15 minutes at a local boneyard and I got 6 new (to me, most definitely not new to the earth) ones. I'm keeping a set of spares for the...
  12. J

    JB Weld on accessory bolt studs in aluminum heads?

    You need a 3/8" bolt to clear the bracket channels. Three of them in each bracket. A larger bolt won't do.
  13. J

    JB Weld on accessory bolt studs in aluminum heads?

    You stated earlier it can be done with the heads installed. I'm thinking make a simple jig to keep the bit perpendicular to the head and let it self center on the hole. Use a right angle attachment and drill it out to depth of 0.6" then tap and set the coil. Sound right? I'll check with AFR as...
  14. J

    JB Weld on accessory bolt studs in aluminum heads?

    Looking through Youtube on comparisons it looks like EZ Lok would work well. Helicoils have a center spar that need to be punched out and since these are blind holes maybe better with a brand that doesn't. I do wish AFR would either warn about the bolts pulling out or, given the cost of the...
  15. J

    JB Weld on accessory bolt studs in aluminum heads?

    Right, but I've replaced the bolts with studs on the accessory brackets in the head now and the studs can stay in the head forever so far as I'm concerned. I don't have any interest in removing the head over something like this. As mentioned I have fresh holes on the back side so would just swap...
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