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09-20-2014
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#1 |
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Join Date: Feb 2013
Location: Sacramento
Posts: 21
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350 cu in LT5
What the highest horsepower can we get out of it. No force induction or NOS. Just naturally aspirated. The plenum and IH has been ported(siamesed). I'm in a process of installing SW headers and eliminating the Secondaries. I will change the injectors as well since car has 98k + miles on the clock. I will also install 4.09 gears. I'm also debating if I should just install the 385 cu.in. Lingenfelter built. Dynoed at 572 at the crank.
Last edited by BennieC.; 09-22-2014 at 01:04 AM. |
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09-20-2014
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#2 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,664
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Re: 350 cu in LT5
Let's say Mr. Polatsidis is north of 560 crank using a .85 factor.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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09-20-2014
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#3 |
  
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,633
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Re: 350 cu in LT5
mid 400's at the tires
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It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
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09-21-2014
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#4 |
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Join Date: Dec 2012
Location: NC
Posts: 1,786
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Re: 350 cu in LT5
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I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] |
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09-21-2014
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#5 | ||
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Join Date: Feb 2013
Location: Sacramento
Posts: 21
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Re: 350 cu in LT5
Quote:
Quote:
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09-21-2014
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#6 | |
  
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: 350 cu in LT5
Ya posted this as I was typing...
Quote:
I'll let Pete or Marc fill in porting specifications for the "500" package if one of them wants to. But, it is safe to say the top end is aggressively ported, long tube headers with 3" outlets into 3" exhausts and B&B mufflers (now fitted with NPP valves to minimize drone), It is cammed, and the phasing is optimized for best performance while remaining streetable.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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09-21-2014
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#7 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,664
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Re: 350 cu in LT5
Pete's ZR traps at 129+. It's also a bit lighter than the stock ZR w deletion of A/C for example. He's a good driver too.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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09-21-2014
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#8 |
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Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: 350 cu in LT5
I hope Pete chimes in, but IIRC Pete posted 474 rwhp before his last go-round of cam grinds. His signature has links to one of his 11.4x second quarter mile runs* at Great Lakes dragstrip; a performance level I've seen repeated several times at the Crown Point Corvette Club's annual Corvette Shootout (next one coming up in a week (9/28/14), as a matter of fact!) But, that was before he upped his cam profile a couple years ago.
*Since then Pete has come to within 0.04 seconds of breaking into the 10s with his latest round of mods to his street driven, NA, stock bottom 5.7 LT5. Any more details, Pete will have to provide (as the FBI gang is sworn to secrecy on pain of a Greek death what goes on in Pete's garage!  )
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 09-21-2014 at 08:08 AM. |
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09-23-2014
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#9 |
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Join Date: Jun 2005
Location: pittsburgh
Posts: 4,633
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Re: 350 cu in LT5
Kirchoffer made a sheet metal intake as well, looked awesome
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It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
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09-23-2014
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#10 |
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,188
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Re: 350 cu in LT5
and imagine that type of intake with Ron Hanselmans ECM
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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Hybrid Mode
