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Project Overbore - LPE 427 complete - 579HP!!!

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Old Mar 29, 2004 | 01:49 PM
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Default Project Overbore - LPE 427 complete - 579HP!!!

Phase 1 of Project Overbore is complete! Just picked up the car from Lingenfelter on Thursday.

LPE installed their 427 Darton package (retaining my numbers matching LS6 block). The package is underrated at 550hp, because Project Overbore made 579hp (492rwhp)!!! The transformation took about 5 weeks from start to finish. Even comes with a warranty.

I drove the car back from LPE Thursday in the rain so I didn't have a chance to open it up until this weekend. All I can say is WOW :steering:

Took off from a stoplight onto a highway in Detroit. Didn't get traction until 4th gear. :thumbs: It's almost scary to turn TC/AH off (notice I said almost :lol: )

I had LPE install Kooks 1 7/8" headers with high-flow cats, along with ASP underdrive crank pulley (with alternator overdrive pulley) and McLeod dual disc clutch.

More mods to come - Classic Design Concepts hood/fascias, Wilwoods, Wolfe Racecraft 6-point rollbar, Rockford Fosgate audio, Hardbar suspension parts, QA1 shocks....turning this into a real overall performer :cool:

Dyno sheet:


Machining the block (talk about a scary sight :bb )


Big valve job


Can't wait to get it to the strip and get some slips. :yesnod:

Thanks to Tom, Tim, Ed, Jason, Dustin, Jack, Al, Steve and everyone else at LPE! Great numbers! :cheers:


[Modified by SpeedStyleSound, 1:53 PM 3/29/2004]
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Old Mar 29, 2004 | 01:52 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

:eek: :cool: :thumbs:
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Old Mar 29, 2004 | 02:22 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

Very nice - which size cam are you using?
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Old Mar 29, 2004 | 02:24 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

DADDY! I missed you so much!!!! :jester :jester
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Old Mar 29, 2004 | 02:43 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (Umrswimr)

Welcome to the club ! Man you got it bad too !

HAVE FUN !
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Old Mar 29, 2004 | 02:46 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (fast 98 C5)

:eek:looks like a beast :thumbs:
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Old Mar 29, 2004 | 02:48 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

:eek: :cool: :cheers:

I'm missing something on the hp #s but damn impressive anyway :)

As for the track, get BIG tires and practice....you should blow my times away due to the torque under the curve....I see high 10s if you can pilot it :cheers:
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Old Mar 29, 2004 | 03:00 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (Mean Green)

pdd - what have you done with the R1 for mods?

MG - I calculated with 15% loss. Doubtful I will beat your 1/4 times - I can't pilot a straight line for nuttin! :lol: Heading to Road America in April to tackle some corners though.

Still getting used to the McLeod clutch - very different feel than stock. Smooth engagement but a lot more pedal travel.
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Old Mar 29, 2004 | 03:10 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (Ruby6spd)

Very nice - which size cam are you using?
LPE GT1 - 218/229 .560/.560 113 CL
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Old Mar 29, 2004 | 03:24 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

Very nice - which size cam are you using?

LPE GT1 - 218/229 .560/.560 113 CL
That is some serious power for a relatively mild cam - It be interesting to see what that motor would make with one of the big boy cams!!

Eitherway - Have fun with that monster :cheers:
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Old Mar 29, 2004 | 04:20 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

:thumbs: And with the best warranty out there.
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Old Mar 29, 2004 | 04:59 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

Awesome!! Congrats! :thumbs:
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Old Mar 29, 2004 | 05:00 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

Factory based intake manifold?

If yes, that's amazing considering smog-legal, stock-based intake, plus such a mild cam. Must drive around town like a dream. What a perfect combo of elegant simplicity (no power adders), drivability, and performance.

My fearless prediction would be 10s @ 132 mph in 60 deg. F sea-level high baro air.


[Modified by STAGED, 10:05 PM 3/29/2004]
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Old Mar 29, 2004 | 05:11 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (STAGED)

Yep, LS6 intake and throttle body. Breathing through high-flow cats and 3" Stainless Works catback.

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Old Mar 29, 2004 | 05:12 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (STAGED)

WOW, at first I thought those numbers were very low but its a small cam. If you put a slightly larger cam that thing would make some serious power.
Phillip
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Old Mar 29, 2004 | 05:13 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (STAGED)

My fearless prediction would be 10s @ 132 mph in 60 deg. F sea-level high baro air.
What kind of tire setup would you suggest to hit that? Seems like I am shy a LOT of grip to post 10's.
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Old Mar 29, 2004 | 05:27 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

thats killer with such a small stick! LPE must do a lot of work to the heads.
:chevy
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Old Mar 29, 2004 | 05:27 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (Ruby6spd)

LPE GT1 - 218/229 .560/.560 113 CL
Man, that's a seriously small cam. :eek:
I think h/c guys would laugh at these specs, never mind big stroker.

That’s excellent power with cats and that cam :yesnod:
It's a pity LPE doesn't put big cams in they're strokers - I wonder how much power it would make with a 24x/24x 6xx/6xx cam with 90mm FAST /90mm TB too :cool:



[Modified by EuG, 5:29 PM 3/29/2004]
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Old Mar 29, 2004 | 06:02 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (EuG)

:cheers:
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Old Mar 29, 2004 | 06:12 PM
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Default Re: Project Overbore - LPE 427 complete - 579HP!!! (SpeedStyleSound)

:D :D :D :D :thumbs:
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