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#1 |
Registered User
Join Date: Jun 2007
Location: Smyrna, GA
Posts: 709
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My new H-Pipe
Just wanted to pass along my observations as I installed an H-pipe on my truck this weekend... What I have bolted to my Mildly built 4-bolt 350 in the breathing department: 4bbl Rochester Q-Jet on an Edlebrock intake, long hookers w/ 2 ½” collectors to 29 ½” L / 2 1/2” in / out Cherry Bomb glass packs that turn down in front of my rear axle. (I have a long bed w/ the coil spring set-up).
SO, obviously this was a relatively loud system. One of my neighbors loved it, the rest were nice about it, but I could tell that it was a bit too much in the mornings. Aside from my expected performance gains, I wanted to quiet things up a bit. Personally, I love the sound of headers and straight pipes, you can’t beat it, but I can’t risk being ‘that guy’ in the neighborhood. I went to summit and picked up one of their $32 h-pipes. When it arrived in the mail, it looked like my 3 yr old nephew had welded it together. I highly suggest spending a few more $$ and go w/ a name brand, hooker, headman, etc. From the research that I carried out I found that I needed to install the H-pipe as close to the collectors as possible. It ended up finding it’s home about 12” back from the collectors, or about 2.5” behind the front cross member just behind the slip yoke on my tranny. I will post pics later- The Pros: It is certainly mild. There is better throttle response, better low end torque as well as a last push that wasn’t there at about 4800 rpm’s( I probably need to re-tune the Q-Jet a bit), and overall my engine is running a bit smoother / more balanced. The Con: I lost my cam loop, or at least I cannot hear it anymore. The sound that I loved so much is gone. It had been compared to my uncle’s ’67 Chris Craft w/ a Chrysler 340…I KNOW, Im not a Chrysler fan either, but the sound of that boat on the water is heaven. To sum things up Im happy with the performance gains, nice and smooth, but it changed the aggressive chop / loop that I enjoyed so much. As for anyone else who has also run this set up, can you give me some suggestions for mufflers that will compliment the H-pipe? I just feel that the packs have lost their effect. Im sure that I’ll get antsy and end up taking it off in a few weeks! Thanks-
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Rottenwood Garage 1970...71...72 C1500 aka Orange aka Sideshow Bob 540 BB Straub Roller Cam, AFR Magnums, XP 950, TKO 600 2 Tons of Fun |
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#2 |
Aluminum slot wheels rule...
Join Date: Jan 2006
Location: Maine
Posts: 6,212
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Re: My new H-Pipe
I was thinking of an H-pipe, but I don't want to lose the little cam lope I have either.
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#3 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Re: My new H-Pipe
it sucks that you tried to do something nice for the neighbora dn it ended up biting you from behind... too bad
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#4 |
Registered User
Join Date: Jun 2007
Location: Sweeny,Texas
Posts: 96
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Re: My new H-Pipe
I have a home made h pipe on my truck and all most the same setup but I have my exhaust coming out the side before the wheels with Full Boar mufflers. Have you re check you timing you can maybe retired it a little a adjust your idle. I still have a little cam loop but I would rather have the performance. And my wife says my truck is to load but man it sound good.
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#5 | |
Registered User
Join Date: Jun 2007
Location: Smyrna, GA
Posts: 709
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Re: My new H-Pipe
Quote:
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Rottenwood Garage 1970...71...72 C1500 aka Orange aka Sideshow Bob 540 BB Straub Roller Cam, AFR Magnums, XP 950, TKO 600 2 Tons of Fun |
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#6 |
Registered User
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
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Re: My new H-Pipe
i'm installing an h pipe this weekend in the same location after my tranny.
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#7 |
Registered User
Join Date: Feb 2007
Location: Cali Central Coast
Posts: 5,191
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Re: My new H-Pipe
The Con: I lost my cam loop, or at least I cannot hear it anymore. The sound that I loved so much is gone. It had been compared to my uncle’s ’67 Chris Craft w/ a Chrysler 340…I KNOW, Im not a Chrysler fan either, but the sound of that boat on the water is heaven.
Lord, I thought I was the only one that loved that sound - or the sound of the old inboard Centurys, at an idle, burbling in the water - it's sweet music. My '70 sounds a little like that (it has an H pipe) but my '67 has straight duals with no cam, and it kinda sounds like there's a hole in a regular muffler. Not too impressive. ![]()
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'67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD ![]() Click here to support the board Philippians 4: 6-7 |
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#8 | |
Registered User
Join Date: Jun 2007
Location: Smyrna, GA
Posts: 709
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Re: My new H-Pipe
Quote:
I have a small Erson off road cam, not too agressive but it's deffinatly there.
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Rottenwood Garage 1970...71...72 C1500 aka Orange aka Sideshow Bob 540 BB Straub Roller Cam, AFR Magnums, XP 950, TKO 600 2 Tons of Fun |
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#9 |
blood type; Retumbo
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
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Re: My new H-Pipe
take off the H pipe and the 29" pack. give it a pair of 12" packs installed backwards and put them as far forward as possible. this should bring back the sound. hehehe
nothing as sweet as a bark and cackle IMO |
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#10 |
Registered User
Join Date: Jan 2006
Location: Seattle WA
Posts: 505
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Re: My new H-Pipe
Does it still sound good when you get on the gas?
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#11 |
Registered User
Join Date: Feb 2005
Location: Redway, Ca
Posts: 97
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Re: My new H-Pipe
Damn that sucks I know how you feel I love loud pipes. I had an h pipe on mine and when I got my exhaust redone I told him I wanted it loud so he did not put one back in. Right away I noticed power loss
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#12 |
Registered User
Join Date: Jun 2007
Location: Smyrna, GA
Posts: 709
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Re: My new H-Pipe
It sounds good, but different. Not the vintage straight pipe sound as before. I dont feel like I win the 'who's exuast sounds better' when another guy pulls up next to me in his mustange or truck-
Sounds a bit more sporty...just not as aggresive.
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Rottenwood Garage 1970...71...72 C1500 aka Orange aka Sideshow Bob 540 BB Straub Roller Cam, AFR Magnums, XP 950, TKO 600 2 Tons of Fun |
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#13 |
Registered User
Join Date: Aug 2007
Location: Benson-ish, NC
Posts: 325
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Re: My new H-Pipe
Same thing happened to me with FM 40's
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#14 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: My new H-Pipe
I`ve never run a cross-over.No one ever used to.I know things vary,but the first thing that goes on a Harley is the crossover.Nothing runs as good a true duals on a Harley.No crossover on race vrhicles either.But,bottomend is a non-issue since they dump at full throttle.Boats and roundy-round racing is all about staying in the power curve,too.I guess crossovers are best for street.Unless untimate performance isn`t such a big deal.I always thought my stuff ran great.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#15 | |
Registered User
Join Date: Jun 2007
Location: Smyrna, GA
Posts: 709
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Re: My new H-Pipe
Quote:
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Rottenwood Garage 1970...71...72 C1500 aka Orange aka Sideshow Bob 540 BB Straub Roller Cam, AFR Magnums, XP 950, TKO 600 2 Tons of Fun Last edited by OrangeCrush1970; 12-07-2007 at 02:36 PM. Reason: misspelled some words |
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#16 |
Account Suspended
Join Date: Sep 2005
Location: Monroe, WA
Posts: 3,815
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Re: My new H-Pipe
The purpose of a crossover is to cancel out the differences in the pulses...so I'm not too surprised that the lope cancelled out since by definition they're out of phase with each other (seperate banks).
Sounds like it's time for a Thumpr cam '-) |
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#17 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: My new H-Pipe
Billa,you win a cantelope for that answer.Much tastier than a canteloop.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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