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#1 |
Registered User
Join Date: Sep 2004
Location: Newark, DE
Posts: 81
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Dual Exhaust ?'s
would adding 2" dual exhaust with glqass packs hurt the performance on a basicly stock engine? any good ideass on how to create some power and noise with the exhaust?
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-Chops- |
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#2 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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That should increase performance. it would be even better if you add headers too.
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#3 |
Speed Limit = Floorboard
Join Date: Jan 2004
Location: Kasilof, Alaska
Posts: 803
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Actually stock hurts performance. 2 inch and glasspacks will be lots better than stock. What kind of motor is it? your sig says 67 truck so I'm guessing its a 327 at the most. I'd go with 2 1/4 with glasspacks. Headers would be a great add on too. Lots of flow. Most of the stock exhaust is like trying to breath through a coffee stir stick. Robs power and mileage.
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1971 C20 350, 4-speed - Sold. 1985 K10 350, Built 700r4, Edel 1406, Performer intake, MSD Ign, Hooker Comps, Silverstars, Piaa drivers, LED tails, Toyo A/T 31's, Eaton Posi, the project. "Build for torque, horsepower will follow" |
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#4 |
Registered User
Join Date: Aug 2004
Location: san marcos,tx
Posts: 266
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yeah, what they said.
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72 GMC sierra 3/4 ton 402 bb ![]() 68 GMC 3/4 ton ![]() 2010 camaro rs: daily driver |
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#5 |
Registered User
Join Date: Sep 2004
Location: Newark, DE
Posts: 81
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excellent. thanks alot for the information. some one elsewhere said tht the dual exhaust would ruin my performance and i thought otherwise and you all helped answer that. and its actually a later 305 in my 67.
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-Chops- |
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#6 |
Senior Member
Join Date: Jan 2000
Location: Cincinnati, Ohio
Posts: 1,492
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I guess you could argue that if you went really big on your exhaust it could lower the torque with a stock engine... A could set of duals is all you really need on that 305.
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#7 |
Left Foot Functioning
Join Date: May 2004
Location: Duncan, OK
Posts: 348
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Good point, Dean.
For the 305, I'd probably stay with 2" pipes to keep the flow up. Larger could detract from your low-end. Glasspack noise output is a combination of diameter and length, so with a 2" diameter, you'll probably stay out of trouble with the sound police with anything 24" or longer. If you have ambitions of a larger motor, especially bigger than 350, might want to go with the 2.25" pipes. SSOW ![]()
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69 C10 (#1 son's ride) 72 C20 (Dad's farm truck) 82 K30 (Ex - brush pumper project) |
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#8 |
Speed Limit = Floorboard
Join Date: Jan 2004
Location: Kasilof, Alaska
Posts: 803
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Yeah with a 305 they are right about keeping the smaller pipe for torque, you could also invest in an h-pipe or x-pipe if you wanted that also helps torque by balancing out the tubes. Depends on what you want for sound, like they said bigger pipe rumbles more. Dean has a point about that you could argue that big exhaust will lower torque but stock is pathetic period.... its designed to be cheap, not powerful.
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1971 C20 350, 4-speed - Sold. 1985 K10 350, Built 700r4, Edel 1406, Performer intake, MSD Ign, Hooker Comps, Silverstars, Piaa drivers, LED tails, Toyo A/T 31's, Eaton Posi, the project. "Build for torque, horsepower will follow" |
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#9 |
Account Suspended
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
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you have got to have a double hump trans crossmember to get the clearence
under the truck..... check my store.... ![]() http://cgi.msn.ebay.com/ebaymotors/w...e=STRK:MESE:IT http://stores.ebay.com/RAGENRAT638S-...RUCKPARTS-MORE |
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#10 | |
Insert funny comment.
![]() Join Date: Dec 1999
Location: Concord NC
Posts: 621
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Quote:
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------------ - Mark -My Build Thread... -68 C10, LT1 - Undergoing Frame off resto -86 IROC-Z T72 turbo 355, M6 -70 Camaro http://www.iroc-ss.com |
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