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[mattdickmeyer]

Good job with the quote, at least we're on the same page now. But with turbo charged engines , especially smaller ci engines the primary size is one of several variables that establishes when in rpm range the turbo starts to come in to boost.Primary size relevant , length , no so much.

[Kraig]

We're not on the same page...if primary tubing size determines at what rpm you make boost, the guys running a rear mounted turbo with 2-3" exhaust tubing running into the turbo must not ever make boost! Turbine sizing, A/R ratio, compressor trim, etc. in comparison to engine size determines the boost threshold rpm. I've owned turbo cars for about 25 years now and have some knowledge on the subject...

[mattdickmeyer]

I said primary size is one (1) of SEVERAL factors , I'm not questioning your expert tutilge as a car owner. You'll notice the over all less than stellar result of a rear mount turbo on a small ci festiva. As an authorized Turbonetics dealer/ installer i'm required to know a tad more of turbocharging than the average enthusiast. As i said no offense, but owning a home does'nt make you a carpanter.I'm just trying to offer my experience to help guys out, but in the end do what ever you feel is right. By the way i'm looking for a certified tech to design and build custom turbo kits ,sounds like you posses overwhelming comprehension in the field , name your price.

[Kraig]

This is a somewhat free country...we don't have to agree with other and that's ok. I think your work looks good! And advice on this site is always welcome....

I do you have an aircraft welding, machinist, precision assembly, AWS certified welding inspector, etc., etc. background....

[eurotiva]

^ both of you guys can dog a rear turbo setup all you want ,but until you are faster than me stfu....Ask anyone here(and there's more than 20 people) who have ridden in my car about rear turbos......Well I'd keep the rear turbo comments to yourself. Isn't this thread about a header?

More pics and less "my turbo pipe is bigger than your turbo pipe"

[fastivaB6TG25MR]

^ both of you guys can dog a rear turbo setup all you want ,but until you are faster than me stfu....Ask anyone here(and there's more than 20 people) who have ridden in my car about rear turbos......Well I'd keep the rear turbo comments to yourself. Isn't this thread about a header?

hate to keep it off track but kudos to you sir... you have my same way of thinking... make something that works better or shut up... just like everything thing else its about preference...

and is 60psi of back pressure really and accurate number? cause wouldnt that push the intake charge out of the cylinder during overlap? well unless you happen to be running above 60psi of boost

and back to the subject at hand... awesome looking manifold... i made my turbo manifold a log style cause im lazy...lol

[eurotiva]

hate to keep it off track but kudos to you sir... you have my same way of thinking... make something that works better or shut up...

and back to the subject at hand... awesome looking manifold... i mad mine a log style cause im lazy...lol

But it works good apparently and I DO NOT CARE what size tubing you used.

Good runs too man. I hope to be in the thirteens now.

[NovaSS]

I found when building headers start with the longest tube first, that way it can have the clearest shortest path. Then add the other tubes and let them snake around the first, this helps make it easier to keep the tubes equal.

Turbo engines tend to respond to all most all the same mods that a normally asperated engine does ( except for cam events and CR numbers) equal length primary tubes means you have a better control over EGT from cylinder to cylinder.

Most guys just bypass over some mods with the idea they can just turn up the boost to correct short comings in their design. Sure just about and type of forced induction will result in an increase in cylinder pressure and regester on the old " butt dyno" but it may not be the most efficienct. As for "rear turbos" they work , it has been proven over and over and from a packaging point ( and cost) they are a viable option.

As for building materials I would either use schedule 80 black wall or stainless. I have yet to see an exhaust coating that will stay on mild steel.

[nonamekid]

Discussion is good, but there will be no more inflammatory remarks or I will start handing out yellow cards. If you guys do feel a need to compare sizes, take it to the arena please.

[gorgonheimer]

I think the main discussion turned from "what works best" to "what works" and that was not the point.

Matt, please continue your work and make bp parts as well.

[NovaSS]

I think it has been a great discussion, We got several views on how to aproach this kind of project. Each has it merrits from "simple / cheap and it works" to " moneys no object"

For most of us its somewere in between, realy if we had unlimited funding would we dumping it into a festiva ????

[eurotiva]

I think the main discussion turned from "what works best" to "what works" and that was not the point.

Matt, please continue your work and make bp parts as well.

x2 Awesome work Matt.

If you ever do make parts for a bp I'll buy 2. Alot of performance oriented people here have bp's. Your fab skills would sell your products easily. Keep up the good work.

[Safety Guy]

Nova asked:

"For most of us its somewere in between, realy if we had unlimited funding would we dumping it into a festiva ????"

Uh, YEAH!!

Of course my $$ would first buy me my twenty acres of land and several large storage buildings, then some more Festivas (some imported, hint hint), and maybe a Chevette project...

As a billionaire, I would quickly have my Festiva for every day of the week, and then some!

Karl

[Kraig]

Spirited discussion helps create improvements....

I never said a rear turbo doesn't work...

[ShagFestiva]

and maybe a Chevette project...


Karl

I also am looking for a chevett project.... they look like fun!