I have a blown supercharged 3.8 gtp. Can I replace it with a 3.8 oem and use my supercharged parts

Asked by Oct 13, 2016 at 12:49 PM about the 1998 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

Question type: Maintenance & Repair

will the oem 3.8 bolt on to my GTP. and be able to handle my GTP parts

2 Answers

4,195

No. You need to find a supercharged engine if at all possible. The parts will fit, but there are some internal differences that are specific to the supercharged model.

If your S/C engine has rod knock but not missing, YES, you can go a few ways to replace the short block with N/A(non supercharged) bottom end but it requires getting educated in modification and retuning. So you can bolt your top end on any series 2 or 3 3800. Paying attention to oil pan, balancer, etc. Because its higher compression it will require exhaust upgrades ie headers/performance exh manifold. ECM retune to adjust timing curve and fuel control parameters (basically the tuner will reduce timing then replace the fuel control part of programming with supercharged fuel map), Look for Intense Racing, Overkill, ZZP and others with solid reputations in 3800 tuning. You can mail them a new/reman computer, your VIN and mods done and they can adjust accordingly. The head, lower intake, blower, balancer and brackets need swapped to other engine. It does result in a bit more power if properly tuned. Also remember doing this eliminates low octane fuel ever. Its doable, many do a "top swap" on N/A cars but have to modify and retune accordingly. For easy drop in just look for another L67/L32. Series3 only have throttle by wire and would require adapter or mods but from 05 up has newer "GEN V" blower intake and few other upgrades, but cost more. If it says Series 2 or 3 you can use it. Differences between bottom end are rods and pistons. Rods are different length and pistons are built to lower compression for supercharger. Google Grand Prix, Regal, Bonneville forums and do some searches. Good Luck

Your Answer

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,370
  • #2
    Tom Demyan
    Reputation
    2,990
  • #3
    munron
    Reputation
    2,370
View All

Related Models For Sale

Used Pontiac Bonneville
529 listings starting at $1,799
Used Chevrolet Monte Carlo
12 Great Deals out of 1,372 listings starting at $995
Used Pontiac Grand Am
1,092 listings starting at $1,599
Used Ford Mustang
756 Great Deals out of 41,941 listings starting at $1,300
Used Chevrolet Camaro
433 Great Deals out of 31,750 listings starting at $2,395
Used Chevrolet Malibu
1,221 Great Deals out of 76,821 listings starting at $1,500
Used Pontiac Firebird
13 Great Deals out of 812 listings starting at $1,900
Used Honda Accord
1,084 Great Deals out of 61,826 listings starting at $999

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
12 Great Deals out of 387 listings starting at $1,200
2007 Pontiac Grand Prix For Sale
12 Great Deals out of 376 listings starting at $1,350
2006 Pontiac Grand Prix For Sale
8 Great Deals out of 459 listings starting at $1,800
2005 Pontiac Grand Prix For Sale
5 Great Deals out of 367 listings starting at $1,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.