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05-23-2008 | #1 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Dyno Compare of Stock v Ported Top End
Go example of stock motor and what porting does to performance. Its not just the hp/tq number but the area under the curves and the peak rpms.
Last edited by XfireZ51; 03-08-2024 at 03:10 PM. |
05-23-2008 | #2 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: Dyno Compare of Stock v Ported Top End
not just porting, you have headers and exhaust too.. and Don's is all stock right? except maybe exhaust, but don still has OEM manifolds and cats right?
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
05-23-2008 | #3 |
Join Date: Jul 2005
Location: Mendota Heights, MN. 55120
Posts: 984
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Re: Dyno Compare of Stock v Ported Top End
Just had mine dyno'd yesterday at DRM. 385 rwhp and forget what the torque was. I have headers, upper ported, K&N air, and Power Effects exhaust system.
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Bob Anderson 1990 #2405 White/Gray Haibeck chip,4:09 gears,Power Effects Exhaust,5 spoke chrome,C5 brakes,49th Street rockers,K&N,Hurst,Headers,Upper & lower ported Minnesota State Director Founding Member #19 |
05-23-2008 | #4 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: Dyno Compare of Stock v Ported Top End
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The numbers on this dyno were ~ 20hp down from previous dyno. That was true for the other cars being dyno'd at BG as well. The guys running the dyno called it "heartbreaker" because it was conservative. Dyno run at Street Stuff was 387rwhp, so in line with bobbyhi's numbers at DRM. |
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05-23-2008 | #5 | |
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Re: Dyno Compare of Stock v Ported Top End
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05-23-2008 | #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: Dyno Compare of Stock v Ported Top End
Very impressive, Dom. Thanks for that (submitted to my ZR-1 file).
Like you said, the (huge!) dynamics change affects the entire characteristics of the LT5 (not that they were bad to begin with!). And, the thing about it is, the 32 valve DOHC design allows for this level of improvement w/o sacrificing street driving characteristics; a very tall order for a 16 valve config, apparently. I have only one question...Where did I put my die grinder!!! P. |
05-23-2008 | #7 |
Join Date: Mar 2006
Location: Innsbrook, Missouri
Posts: 1,727
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Re: Dyno Compare of Stock v Ported Top End
here's mine after i got er done
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05-23-2008 | #8 | |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: Dyno Compare of Stock v Ported Top End
Quote:
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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05-23-2008 | #9 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: Dyno Compare of Stock v Ported Top End
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This had to be after you guys finished in the parking lot at BG! Nice FLAT torque curve too. |
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05-27-2008 | #10 |
Join Date: Jan 2008
Location: Antioch, Illinois
Posts: 129
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Re: Dyno Compare of Stock v Ported Top End
To answer the questions of my motor that Domenic refers to -
The engine is completely stock with the following exceptions DRM Chip, Acell injectors, Cat back Flow master exhaust. K & N replacment stock air filter, A/C delco replacement plug wires and NKG Iridum spark plugs. And Oh - by the way - A reman / used A/C Delco Alternator that was replace that Friday in BG - That had to increase HP & Torque by ????? At least $575.00 dollars worth. Last note - engine has 76,000 miles at time of Dyno. I am very happy with the HP & Torque results - Even happier that I have approx. 20hp more then what is shown on the chart - since it appears it was a conservative Dyno as Domenic stated. The other three cars were off by approx. 20hp from their previous dynoe tests. 350 RWHP - Don Yoakem 91-#267 Dark Red Met. |
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