Thread: Dyno time 584 rwhp. 6262 turbo ST1 cam

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  1. #1 Dyno time 584 rwhp. 6262 turbo ST1 cam 
    SE Level Member SlowFiero's Avatar
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    Strapped the car down on the dyno today for some tuning, had some issues making my normal 28lbs of boost but still very happy with the results. This was on 25lbs of boost, pump gas with NOS brand octane boost, and iced intercooler. Mustang dyno, so dyno jet would be approximately 12% higher hp.







    Unfortunately tonight in trying to fix the boost issue, it over boosted, and blew the head gasket out.




    I'm going to take the car apart and sell off the turbo setup, gm racing transmission parts and/or transmission. Time to move on.
    Billet 6262 T3 turbo, PT1001 intercooler, ST1 cam, 140 springs, pushrods, N* TB, L26 upper, HV3, otherwise stock L32. 10.007 @ 135.54with 1.46 60' 3130 lbs

    Old GenV M90, XP, heads, N* TB, ST2 intercooler - 11.425@115.60 1.54 60'
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  2. #2 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
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    Nice numbers!
    An engine is an engine no matter the size.... I think Dr. Seuss said that... or maybe it was Big Weld....
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  3. #3 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    GTP Level Member 97AutoXVette's Avatar
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    Damn, good numbers. sorry to see about the head gasket. Did you just finish the build and now deciding to part out?
    1998 GTP sedan: sold, 1999 GTP coupe #1: sold, 1999 GTP coupe #2 on E85: totalled
    2002 GTP sedan:
    3" downpipe|PLOG|poly mts|160 T*|60# Injectors|ZZP Intake|1.8 YT RRs|Ported Gen3|Ported ZZP S2 TB|E85|FP rewire|ZZP FSIC|WP UD Pulley|2.8 MPS|HP-Tuners
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  4. #4 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    SE Level Member SlowFiero's Avatar
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    Been running a few years, was going to part it out end of this summer anyway. Wanted one more kick at running a 9, but it's not to be.
    Billet 6262 T3 turbo, PT1001 intercooler, ST1 cam, 140 springs, pushrods, N* TB, L26 upper, HV3, otherwise stock L32. 10.007 @ 135.54with 1.46 60' 3130 lbs

    Old GenV M90, XP, heads, N* TB, ST2 intercooler - 11.425@115.60 1.54 60'
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  5. #5 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
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    what head gaskets were in it?
    - 2001 Grand Prix XGT -- 11.21@124MPH
    - 2010 Chevy 2500HD LTZ -- Car hauler
    - 2011 BMW 328i Xdrive -- Wife's Daily
    - 2014 Ford F250 crew cab -- 6.2 liters of ford fail
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  6. #6 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    SE Level Member SlowFiero's Avatar
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    Stock head gaskets, 87000miles, heads had never been off. Other than cam, springs, pushrods etc, it was a bone stock engine.
    Billet 6262 T3 turbo, PT1001 intercooler, ST1 cam, 140 springs, pushrods, N* TB, L26 upper, HV3, otherwise stock L32. 10.007 @ 135.54with 1.46 60' 3130 lbs

    Old GenV M90, XP, heads, N* TB, ST2 intercooler - 11.425@115.60 1.54 60'
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  7. #7 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
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    Holy **** thats impressive 28psi and never lifted a head with stock bolts. Im a lot less worried about turning mine up now
    - 2001 Grand Prix XGT -- 11.21@124MPH
    - 2010 Chevy 2500HD LTZ -- Car hauler
    - 2011 BMW 328i Xdrive -- Wife's Daily
    - 2014 Ford F250 crew cab -- 6.2 liters of ford fail
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  8. #8 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    GXP Level Member Turbocharged400sbc's Avatar
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    thats with the low lift ST1?
    we have the ST1R with .571 lift but the same 206/206
    ~James~ Psychotic Gearhead
    projects: 84 Cressida waGN~ 90 LN3 3800, equal length headers, T70, 89 700r4, misc parts,
    1994 Oldsmobile 442 (462ci-4wd-2 engines) L67/4t80e^2,
    00 Turbo Regal 608 fwhp 575ftlbs at 5500rpm, 98 WhippledRiv, 97 GTP
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  9. #9 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    SE Level Member SlowFiero's Avatar
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    Yes standard ST1, .512 lift. Honestly was trying to break 600 on mustang dyno as goal, but it wouldn't make the last 3 lbs even with the solenoid at 100%, probably needed more waste gate spring. It picked up 100 hp from "street boost" of 15/16 lbs to the 25 on that run, would have been pretty close at 28lbs.
    Billet 6262 T3 turbo, PT1001 intercooler, ST1 cam, 140 springs, pushrods, N* TB, L26 upper, HV3, otherwise stock L32. 10.007 @ 135.54with 1.46 60' 3130 lbs

    Old GenV M90, XP, heads, N* TB, ST2 intercooler - 11.425@115.60 1.54 60'
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  10. #10 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    GTP Level Member Silver2kgtp's Avatar
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    very nice!!!

    http://s1292.photobucket.com/user/si...d%20Prix%20GTP
    10.99 @ 121.99 1.74 60' (Ran out of fuel : +18 AFR)NO SPRAY!!!
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  11. #11 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
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    Great numbers... fix the head gasket!

    With the 6262, might have been pushing the limits of the thing? Crank wise, you were probably closing in on 700...

    Love to see ya fix head gaskets and slap a 6765 on that thing and rip some times well into the 9s...
    2001 Turdbo Grand Prix GTP - 10.41@132
    Videos @ https://www.youtube.com/user/jdredd34
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  12. #12 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    SE Level Member SlowFiero's Avatar
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    It rattled pretty good before it popped. Didn't even have time to react. Guessing it was 35-40 psi, and lean since I didn't have fueling set for more than 28psi. Pretty sure rod bearings are probably hammered and ready to spin. The plan was to part out this fall anyway, so I'm just going to do it now. I've lost interest in the two seater over the last few years having wife and two kids, I'd like to move into a turbo Buick or grand national.
    Billet 6262 T3 turbo, PT1001 intercooler, ST1 cam, 140 springs, pushrods, N* TB, L26 upper, HV3, otherwise stock L32. 10.007 @ 135.54with 1.46 60' 3130 lbs

    Old GenV M90, XP, heads, N* TB, ST2 intercooler - 11.425@115.60 1.54 60'
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  13. #13 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    SE Level Member SlowFiero's Avatar
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    Well while going through the garage looking at parts to sell and keep, I realized I had a set of used MLS head gaskets and a set of ARP head studs sitting there. Pulled the heads off and realized both heads had been lifted, and the front head gasket was about ready to fail as well. They were pushing combustion gasses out both inside and outside the engine. However both the heads and block looked good, so I cleaned everything up, put a coat of copper coat on the head and block and two coats on the head gasket as I assembled each side. Fired it up on the 23rd and went to a no-prep arm drop race at the airport on the 25th. Started at 15lbs and turned up slowly until last two passes at 26psi, no issues. Entered a cash days style race there and ended up top 5 out of 38 cars. Screwed up the launch and spun on my last pass, or it would have been a hell of a race.

    Here is video of first run a friend took, I didn't have the technique figured out to get the car to hook yet, and spun pretty bad.

    https://youtu.be/j931kmM2D-I

    Still a chance to get a 9 this year after all.
    Billet 6262 T3 turbo, PT1001 intercooler, ST1 cam, 140 springs, pushrods, N* TB, L26 upper, HV3, otherwise stock L32. 10.007 @ 135.54with 1.46 60' 3130 lbs

    Old GenV M90, XP, heads, N* TB, ST2 intercooler - 11.425@115.60 1.54 60'
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  14. #14 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    GrandPrix Junkie ItHurtz's Avatar
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    excellent
    2000 GTPT Sold-brandonhall10 built trans
    2009 Challenger SRT8
    http://www.grandprixforums.net/threa...uestion.....no
    Expert at being gay.
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  15. #15 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    GrandPrix Junkie SgtMarshal's Avatar
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    That's pretty awesome. What transmission are you using?
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  16. #16 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    SE Level Member SlowFiero's Avatar
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    4t65 with gm racing input, 1" chain, triple edge valve body input and 2nd clutch, z-pack 3rd. Precision billet cover non-lockup tq converter.
    Billet 6262 T3 turbo, PT1001 intercooler, ST1 cam, 140 springs, pushrods, N* TB, L26 upper, HV3, otherwise stock L32. 10.007 @ 135.54with 1.46 60' 3130 lbs

    Old GenV M90, XP, heads, N* TB, ST2 intercooler - 11.425@115.60 1.54 60'
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  17. #17 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
    GrandPrix Junkie CrazyGuy03's Avatar
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    Jesus dude... That's insane Glad you gave you gave it another go
    2003 Buick Regal GSX lots of mods - click here to see latest build - http://www.grandprixforums.net/threa...ld-for-the-gsx

    *For Reference - Does not have a Zack Howard Cam - It's an Intense Stage 3 - Thank You*
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  18. #18 Re: Dyno time 584 rwhp. 6262 turbo ST1 cam 
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    Good to hear
    2001 Turdbo Grand Prix GTP - 10.41@132
    Videos @ https://www.youtube.com/user/jdredd34
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