V8 Headers and exhaust

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Surely you jest....I am no professional welder but I do not think one can weld Ti pipe to a low carbon steel Flowmasterbater muffler. Looks like aluminized steel pipe to me. Quality nonetheless.
 
Hello everybody,



This is my first post, I’m writing from Chile, and I’m somewhat confused by the different option for exhaust headers in a conversion to sbc 350 with Toyota h55f gearbox in a fj40. Initially I installed block hugger, the cheap version, but they interfered with the steering column, so I tested ramhorn center dump, and all the problems I had with the steering disappeared. I have seen that it is quite a well documented option and used in conversions you’ve done, but local friends have indicated that I should return to the block hugger, adapting the steering column or block hugger tube, pointing out that otherwise the motor will lose hp’s. However no one has been able to confirm if this is true or not, or what the hp loss would be using ramhorn instead of block hugger. Is the loss of hp true or just a myth? I really like the simplicity of using ramhorn.

Appreciate your comments.
 
Mine is from a PO, and have a run each side (no cross over) that is on the outside of the frame and comes out in front of the back tire. not my choice, but works for now. I dont like getting exhusted when I get into the rig while its warming up.
I have headers but no clue which ones. I Just know there aftermarket.

I would prefer out the back and will probably change it down the road for the muffler is right under each seat and I am not doing much wheeling at the time so wont be crushing anything till later. to many ohter things to get fixed before the real fun begins.
 
Go down the driverside like factory FJs:confused:

First you state:

Then you state:


Outside the frame rail will be worse than a cross over. It stuffs your muffler outside the frame rail under the rockers... prime place to crush stuff.

A competent muffler shop will be able to tuck a crossover pipe real tight.

Plus, if you are having problems hitting your crossover pipe, you have other things to worry about:lol:

Not clear is whether you are talking about single or dual exhaust. Usually, when someone says "crossover pipe" they are talking single *confused*

On my 40, I went single exhaust down the driveside with ramshorn manifolds. On my 55, I will be doing the same thing with hooker block hugger headers.:meh:

Hey Guido, before you go patronizing a fellow 'mudder do some dang research! He may be using the term "crossover pipe" to indicate an "X" pipe to help with scavenging. In which case his statement is valid and you look like a fool! Mind your manners youngin'
 
Yeah, my bad man. I didn't catch the date 'till just today. It was a little rash of me to go there. Not sure what your definition of a fool is but when I saw your comment to a guy who was being honest about not knowing enough and you jumped on him like that I had to say something. That wasn't right man. So, while I should have probably kept my mouth shut, you were still less than cool man and it really did make you look like a fool. An (or "X") pipe is always a good idea for dual exhaust and you made it sound like he was stupid for considering it. I'm done with this man, be more respectful of your fellow 'mudders, you may need to be winched out by one of them someday.

Oh, and I promise to check dates before responding next time.
 
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If you chose the over-the-frame-rail-type headers you get what you deserve for not researching first.

Seven words: rams horn manifolds, competent custom exhaust shop

hough said,

dont waste your time on anything else. trust us. been there done that.
 
Hello everybody,



This is my first post, I’m writing from Chile, and I’m somewhat confused by the different option for exhaust headers in a conversion to sbc 350 with Toyota h55f gearbox in a fj40. Initially I installed block hugger, the cheap version, but they interfered with the steering column, so I tested ramhorn center dump, and all the problems I had with the steering disappeared. I have seen that it is quite a well documented option and used in conversions you’ve done, but local friends have indicated that I should return to the block hugger, adapting the steering column or block hugger tube, pointing out that otherwise the motor will lose hp’s. However no one has been able to confirm if this is true or not, or what the hp loss would be using ramhorn instead of block hugger. Is the loss of hp true or just a myth? I really like the simplicity of using ramhorn.

Appreciate your comments.

Keep the manifolds (Rams horn or otherwise). Block huggers aren't a significant improvement over manifolds. Unless your goal is drag racing you won't notice the difference in an Fj40.
 
Running some cheap chrome block-huggers and 2-1 exhaust just like Cirbo's. Couldn't me happier. Sounds great and runs awesome. Everything is tucked high and dry, and only one tail pipe to worry about smashing.

Jeremy
 
well i guess i will get in on this block hugger headers and true dual exhurs.t no 2 into 1
fj40 complete 021.webp
fj40 complete 023.webp
fj40 complete 038.webp
 
Fieldsken1, do you have problems with the headers lostening over time? I had a set on a 1970 2WD 'Burban and it seems like I had to tighten them more than I really wanted to. Can someone verify for me but aren't headers only doing their thing at high rpms? I don't think they really add to low end torque. Flow really isn't an issue at those rpm's, I don't think.

Kinda like what Bikersmurf said. I ain't gonna be drag racing my SOA 35-inch-tire'd FJ40 anywhere. Most of my engine's work will be below 2000 rpms .... well most of the time anyway ... at least 'till I have to fill the gas tank a few times then my foot might get a little lighter!
 
i used an extra thick gasket and i retighten them once so far. also who cares if they work they just sound good..


Sizing - The diameter and length of the header tube are critical. For a given engine displacement, a smaller tube will cause the exhaust pulses to flow faster down the tube, thus increasing the momentum and the scavenging effect. Too small a tube and back pressure increases. Long header tubes provide superior low RPM performance while shorter tubes work best at high RPM. Optimal tube length and diameter depends on displacement and the desired RPM for the power band. Hence big race engines - big tubes, small street engines - small tubes
 
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Ram's Horn:
Work, Sound good, never need to be tightened, last forever(Running OEM ones from 1969).
 
but if i dont use my tools the wife might not let me get more. she will think i dont need them

I don't have to worry about that. I'm coming on 20 years on my "build". I won't be running out of things to do for a long time.

Nice truck, by the way.:cheers:
 

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