"How Sweet The Sound"

[Gobird]

Re: "How Sweet The Sound"

Paul, Isn't that what I said.

[jerrym3]

Re: "How Sweet The Sound"

Learn something new everyday.

So, how does a V8 with single exhaust get around this issue?

Also, should after market headers use an "H" pipe? I thought headers were designed to have one cylinder sucking out another cylinder on the same bank.

[bronzebird]

Re: "How Sweet The Sound"

Learn something new everyday.

So, how does a V8 with single exhaust get around this issue?

Also, should after market headers use an "H" pipe? I thought headers were designed to have one cylinder sucking out another cylinder on the same bank.

A v-8 with a single exhaust doesn't have that issue because it all dumps into one pipe. That is what the crossover pipe on a dual system tries to account for.

Most aftermarket headers have some type of crossover in the system either before or after the cats.

Bronzebird

[bronzebird]

Re: "How Sweet The Sound"

How so? Can you explain, please?

Paul Davidson did a remarkably good job of doing just that.

Bronzebird

[jerrym3]

Re: "How Sweet The Sound"

I really don't have a dog on this subject, but since I run straight pipes on my Galaxie, I figured I'd do a little research.

Concensus from most gearheads (and I say that with much respect; wish I were more of a gearhead) is that while the valves will not burn up, an H pipe will give slightly more HP (and balance the sound), while an X pipe is even better at both.

Anyway, I'm not planning to add an H pipe to my Galaxie, or change my retro's exhaust, so doesn't make that much difference to me.

PS, with no H pipe, I got 110,000 miles out of my Galaxie's 352 block, and it was a knock that forced me to replace the motor, not bad valves.

[bronzebird]

Re: "How Sweet The Sound"

I really don't have a dog on this subject, but since I run straight pipes on my Galaxie, I figured I'd do a little research.

Concensus from most gearheads (and I say that with much respect; wish I were more of a gearhead) is that while the valves will not burn up, an H pipe will give slightly more HP (and balance the sound), while an X pipe is even better at both.

Anyway, I'm not planning to add an H pipe to my Galaxie, or change my retro's exhaust, so doesn't make that much difference to me.

PS, with no H pipe, I got 110,000 miles out of my Galaxie's 352 block, and it was a knock that forced me to replace the motor, not bad valves.

I agree that in a 352 ci motor ( I had a '66 Galaxie with the FE 352 motor) running straight pipes may not kill the valves but there are some differences between that motor and the tiny, (by comparison) 241 ci V-8 in the '02 T-Bird.

1. We ran leaded gas back then and that lubricated the valves a lot more than today's mixture of corn oil and petroleum. They stayed coated and a lot of that crap had to burn off before the valves did, so while they looked ugly they still did their jobs of closing fully. Also the exhaust valves were larger and there were less of them.

2. The T-Bird engine has variable valve timing versus fixed valves in the Galaxie. One enemy of the technology for variable timing is heat. Without an 'H' or 'X' pipe you get more heat build up. Excessive heat with smaller valves causes warping and loss of power.

I'm not a gearhead either.

Bronzebird

[V8 Cat]

Re: "How Sweet The Sound"

The T-Bird engine has variable valve timing versus fixed valves in the Galaxie. One enemy of the technology for variable timing is heat. Without an 'H' or 'X' pipe you get more heat build up. Excessive heat with smaller valves causes warping and loss of power.
Bronzebird

Rick,
Thanks for pointing this out. These small DOHC, 32 valve, engines with variable valve timing are a whole new ball game. Add the unleaded gas with ethanol content, and all of these modifications the manufacturers are making are there for a reason. So if I was doing any modifiction, I would want the whole package from professional aftermarket supplier like Borla - not saying they are the only one, but be careful.

[Sumerbird]

Re: "How Sweet The Sound"

Borla with K&N cold air intake is a very nice set up on the Thunderdird.