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#1 |
![]() ![]() Join Date: Jun 2005
Location: pittsburgh
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I was looking at marc's site the other day to get a price on a 415 package, not that I'm considering it, i was looking it for an email on the list serv. and I saw that he has listed hp gains for porting, headers, exhaust, ect but not torque gains. does anyone have any ideas for what the torque gains are?
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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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#2 |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,645
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I would think that you could get a feel for the T/Q gains from all the dyno sheets posted by the guys that have had various types of work done. Dominic comes to mind instantly as he posts some very interesting charts.
Generally I would offer this thought. The bigger the explosion, the more T/Q one would see to a limit. So a P&P job would be going in that general direction. However, T/Q is also influenced by how big the piston is, so bigger = more T/Q. Also along the same thought pattern, the longer the con rod the more the T/Q as it's a longer lever with which to do work. Those are my thoughts, JMHO. ![]() ![]() Tom
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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#3 | |
![]() ![]() Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
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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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#4 |
Join Date: Feb 2004
Location: Ma
Posts: 404
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See Kevin......... nothing to it...............right?
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1990 ZR1 #2574 Medium Quasar Blue Metallic 1 of 19 |
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#5 |
![]() ![]() Join Date: Jun 2005
Location: pittsburgh
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i'm going to go cry in the corner now
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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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#6 |
![]() ![]() Join Date: Aug 2005
Location: Northridge, CA
Posts: 1,457
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Easy:
Torque (& HP) = $$$ |
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#7 |
![]() ![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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The lines are kinda faint, but if you can make them out, here are some graphs to compare one of Marc's 415s to a "500" packaged 350 and a stock 90.
Compare one of Marc's 415s to a stock 350 with and without a "500" package 350: The 415- ![]() The "500" build- ![]() The stock (90) w/ a Borla cat-back. ![]() No replacement for displacement, as the saying goes! the 415 makes approx 27% more torque at 5000 and generally across the rpm range over a "500" package 350, and something like 46% more over a stock (90) at 5k rpm. Hope this helps.
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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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#8 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Pretty lousy fuel curve on the stock motor!
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#9 |
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Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
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No chit!! That's why the rpm was limited to 6k.
P.
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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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#10 |
![]() ![]() Join Date: Jun 2005
Location: pittsburgh
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paul,
thanks for the graphs but it's not really what I was looking for. as I said, on marcs site he has a break down of porting adds x hp, headers add y hp, flywheel adds z hp, I was wondering if there was a corresponding break down for torque gains
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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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