The Turdle's Exhaust-(yeah revisited again)

[Turdle]

just to add on to this

regualr core on the left, highflow on the right, the difference you can see alot more in the zoomed view under
There may be people who sell high flow cats that are fake but yes there are high flow cats

Thanks for saving me the time

 

[CougarX]

Say Brad, have you noticed the Pro Comp heads that are common on eBay? They claim to be from Australia, I have read China as their origin. They have normal Ford bolt patterns like the GT40's, and they have ports which are higher by about 1/2".

No I haven't seen them before, but they look good. So they will bolt up to a header that fits on a GT40P? I see they have dual pattern exhaust threads.

The big thing I learned hunting around was that like most imported heads many have or have had minor defects. I bookmarked a company who specializes in building heads, their forte is doing stock or stock like heads, including the GT40's through all FMS heads(the under 6000rpm heads). Their $600 charge covers all porting and assembly. I saved their website because they know how to work those imported heads, find and correct the defects.

Do you have the link for the builder you speak of that does know what they are doing for sure?

Below is a link to a regular seller on eBay, I don't know anything about their knowledge in building them. The heads all come in bare, so the builder is critical.
http://cgi.ebay.com/ebaymotors/ws/e...STRK:MEWA:IT&viewitem=&item=150136612417&rd=1

I definitely like the price on these heads. I'll have to look into them more for when that time comes. This same seller has 331 long blocks with these heads and my exact cam (Comp Cams 35-514-8) and is claiming "380Hp @ 5400 rpm –380 Ft Lbs of Torque @ 3800 rpm." I emailed them to ask them for a dyno sheet so we'll see what they come back with. This seems like a very usable power band too being as most built engines on EBay seem to be for lightweight Mustangs and high RPM power.

 

[Turdle]

Mandrel bent pipe necessary?

I cannot find anyone around who does the smooth -mandrel type bends. I found a shop that will weld up pipe which is tacked-or, would even piece together mandrel pieces for 45 per hour--

I could go the extra effort I guess to cut and tack pieces together-but I never have done this-
My other alternative is to just let them crimp bend the tubing--

Thoughts? what will I really gain from mandrel bent exhaust tubing? If it is a matter of a 10hp difference, then I would do it--

 

[410Fortune]

Trip to Denver?

There are a few shops around here that will do mandrel bent exhaust on trucks and hot rods

 

[Turdle]

Trip to Denver?

There are a few shops around here that will do mandrel bent exhaust on trucks and hot rods

I hope to make the trip to Denver a fun one--hang out and see the Mountains-well, and you of course

I could probably find a place in KC for sure-I just wonder if it is really worth all the effort.

 

[Jakee]

I personally think you should do mandrel bends with your new exhaust Idea's (Single) I don't know the HP increase/decrease but the only real way to find out is to try it both ways. My way of thinking is not take any chances. Jt - I'm pretty sure you can do your own exhaust with a bend kit, and a stick of straight pipe. It's really not all that hard, but you will be going back and forth from under the truck many many times.

And after you finish it up, take it back out and coat it.

 

[Xan]

i got an idea for you. this is how my friend does his
Do it your self!
http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2D907016&N=700+115&autoview=sku

 

[Jakee]

Good luck with that bender. Not to knock it, but we have one of those and it's not all fun and games trying to get something bent smooth.

 

[Turdle]

Notes: This pipe bender is designed to bend water pipe and heavy gauge galvanized pipe used in commercial applications. This bender is not recommended for use with thin wall tubing, like exhaust pipe.


I was told a mandrel bender is a $100,000 k machine

 

[Xan]

Notes: This pipe bender is designed to bend water pipe and heavy gauge galvanized pipe used in commercial applications. This bender is not recommended for use with thin wall tubing, like exhaust pipe.


I was told a mandrel bender is a $100,000 k machine

lol din't notice that, wonder why they even sell it then.... :thumbdwn:

 

[Jakee]

It will bend pipe, but you'd be better off having crimp bends done somewhere.



Jt - This is what I'm gonna do on my turbo.

1) Fit all the pipes (Make the cuts, and grind flush)
2) Tack into place around the pipe
3) Take off and send to a real welder. Someone that can get penitration without burning thru the pipes making restrictions. (My dad)

If you had a good welder around you locally, this is one option....

 

[Xan]

You know i doubt you'll lose much of anything (like .5 to 2 hp?) from not having perfect bends or perfect welds (non leaky ones anyway). That and you might just end up doing your exhaust again. Are you really that worried about it?

 

[410Fortune]

unless you plan to go boosted, with a SBF I dont think the mandrel bends are going to gain you 10HP over a well put together, non mandrel setup

HP per cost difference may not be worth it IMO (agree with above)

 

[CDW6212R]

The mandrel bends are very desirable for the final exhaust. The problem is that most people change their exhausts more than once. For real high performance it is worth it. Jon needs mandrel bends around the rear end and engine. The minor bends to steer around the torsion bars, mufflers, and tailpipes aren't as important. That's part of why some people use pipes that are a little too big.

 

[CDW6212R]

No I haven't seen them before, but they look good. So they will bolt up to a header that fits on a GT40P? I see they have dual pattern exhaust threads.



Do you have the link for the builder you speak of that does know what they are doing for sure?...

I'll look a little harder in my favorites, it wasn't where I went looking for it yesterday. The exhaust ports are supposed to be the normal ports pattern, the GT40P is different(the plugs). With tight confines of the Explorer, with any change from bone stock port locations, any headers will be a new test.

I'm planning for the small version of those Pro Comp heads, with a 75k engine(+ cam) and stock exhaust. That way I can build an exhaust to fit properly, from the back to the front. I will buy mandrel bends etc. and cut/fit/tack the pipes for tailpipes, then mufflers, then cat pipes, then cross overs, and lastly headers. All of their heads should fit alike, so I'll buy different heads for a final engine last. Regards,

 

[CougarX]

Well, depending on what kind of timeframe you're talking about maybe I'll buy the first set of heads off of you when you go to larger heads. Its gonna be a while before I get to heads anyway. Too many projects and too little money :. I was looking at the 190cc heads anyway since I plan on lifting the truck some eventually so I'm going more for torque and a wide powerband then peak hp and high revs.

 

[CDW6212R]

Well if I plan properly I will buy the ported small heads, and then reuse them for my Lincoln and turbos. I know that the builder that I found does his work for $600, and works on those heads. I just do not know what he sells them for, his initial price may be a good bit higher than those seen on eBay. They are just very attractive if they do emulate the real Edelbrock Victor Jr. heads.

 

[Jakee]

Mandrel bends and kits.

http://store.racing-solutions.org/mandrelbends.html

 

[Turdle]

Exhaust cut out

I have to have this!!

http://www.mccordcg.com/mpp/order.htm

Plans change--I'm doing 3" all the way----

 

[Burns]

Oh baby. Yes that will be nice