stock manifold bore??

[240SXsaint]

who and has done it and what were the results of it would like to know how much of a bore you did and it advantages and disadvantages and if your using a stock turbo or not???

please leave the negative comments to yourself

[240SXsaint]

anybody with helpful info???

[CrazyRob]

intake manifold? exhaust manifold? are you talking about porting?

[240SXsaint]

intake manifold? exhaust manifold? are you talking about porting?

the exhaust manifold porting yes

[rb25_s13*CHUKI]

Its very effective but Its also very expensive. Its been done before. I would recommend It If you can find a person to do It at a reasonable price.

[Z U L8R]

not trying to be a debbie downer lol, or negative....

but stock is a log manifold....by design it's not really optimal for high flow at high rpm. it's design was that of budget and drivability (quick response).

on the other end of that manifold still lies a very small/restrictive factory turbo.

therefore slightly enhancing the volume/capacity of the exhaust manifold, that still has a restriction on the other end wouldn't benefit efficiency half as much as upgrading to a bigger turbo.

i'm really not trying to shoot you down man, i'm just questioning your intentions so you can invest your time/energy/money in the best possible way to meet your goals.

as far as lowering your exhaust pressure closer to your intake manifold pressure to optimize head flow, upgrading your turbo would be my first choice.

sorry for not answering your question. i've never ported one before so i don't know.

best of luck,

Dave

[240SXsaint]

Its very effective but Its also very expensive. Its been done before. I would recommend It If you can find a person to do It at a reasonable price.

yea i have someone that can do it for a nice price just trying to find info on the gains

not trying to be a debbie downer lol, or negative....

but stock is a log manifold....by design it's not really optimal for high flow at high rpm. it's design was that of budget and drivability (quick response).

on the other end of that manifold still lies a very small/restrictive factory turbo.

therefore slightly enhancing the volume/capacity of the exhaust manifold, that still has a restriction on the other end wouldn't benefit efficiency half as much as upgrading to a bigger turbo.

i'm really not trying to shoot you down man, i'm just questioning your intentions so you can invest your time/energy/money in the best possible way to meet your goals.

as far as lowering your exhaust pressure closer to your intake manifold pressure to optimize head flow, upgrading your turbo would be my first choice.

sorry for not answering your question. i've never ported one before so i don't know.

best of luck,

Dave

yea i have a sapare stock exhaust manifold and turbo to play around with so i just figure i would try it out and see what happens

[codyace]

The stock turbo manifold is in fact a fantastic piece, that really aids in heat retention (this helping spool turbos faster). Along with this postive, they are also STRONG. It takes an incredible amount of force to break a stock manifold, to the point where maybe 1 in 50,000 ever have an issue.

Porting/polishing IMO is a waste on them though. You can only realistically get' so far into them, thus rendering much work as useless. Gasket matching though is always a nice step to take (assuming yo uhave it all apart) as it just improves velocity.

HOWEVER, all is not lost, as EXTRUDE HONE is still an option, and is (in fact) the best thing you could ever do to a stock manifold. Lets face it, everyone wants the most power for the least amount of money -- but in our case, extruding a stock manifold not only gives you the most power out of ANY manifold for a T2 based setup, but it also is affordable. Unlike traditional porting which is limited by tool size, extrude hone is abrassive puddy, which will flow the same as air will. Cliffs: Extrude hone can literally port/polish the entire manifold.

Tubular manifolds are problematic at best, and shift powerbands to the upper rpms, typically beyond the 'power threshold' of all bottom mount turbos. Sure they look sexy when you pop the hood, but I'm a FORM > FUNCTION guy, so it's all abotu HP to me. Plus, I don't want to deal with the constant cracking, heat loss, and power shift that tubulars allow. (Now granted, if going with a T3 flanged turbo, going to a tubular manifold is the only (and best) way to go. You now allow the turbo to breath, and it helps 'expand' the top end power of those higher RPM turbos.

High Performance, High Output Racing - GetHoned (http://www.gethoned.com) is the official website for Extrude Hone. I love their stuff, and swear by it. There is a funny 'similarity' amongst the cars I build. They all make 390-410 whp, all use the same stock manifold (extrude honed and swain coated), and all are reliable as the day is long...something that can't be said by most.

Here are some pics for you, this stuff ROCKS. NOW lets also not forget the follow disclaimer:

Is this for all owners? Certainly not. While an excellent mod, you also should look at your overall setup. I would strongly suggest going with at least an s15 turbo before even considering it, as there are certainly more worthwhile modifications to undertake before going with this.

http://www.codyace.com/albums/album188/ex14.sized.jpg

http://www.codyace.com/albums/album188/ex5.sized.jpg

http://www.codyace.com/albums/album188/ex9.sized.jpg

Smooth as a babies ass. Great stuff!

[jspaeth]

Cody loves the stock mani so much. I believe him.

Until someone can beat his setup with a 2871R, I see no reason to not listen to him....

What works for bigger turbos (tubular manis) does NOT necessary give the optimal performance with the medium-sized 2871R


My friends always argue with me about this, and I try to explain, but they don't wanna hear it.

[jspaeth]

Oh and by the way, by "beat" I don't mean just a simple PEAK hp number.


Area under the curve my friends.

[codyace]

What works for bigger turbos (tubular manis) does NOT necessary give the optimal performance with the medium-sized 2871R

Exactly! I mean there is just somethign to be said about the overwhelming benefits of the stock manifolds that it's frustrating to watch people buy the 700 dollar Tomei manifold, and having that constant 'what if it cracks, man no torque' aspect of things.


Oh and by the way, by "beat" I don't mean just a simple PEAK hp number.

Area under the curve my friends.

This is a concept that so many FFF's forget - only superstreet cares about that top end peak number...and it's a shame.

"My car makes 430 hp" and people go 'oh shit, that's awesome, better than CodyAce

and then I respond "that's cool, but i'm on pump gas less boost, and still have more average power, and much more torque...but that's cool if that peak HP strokes your ego" ya know?

[240sxvaj]

i know that these have been done on the 2000 celica GTS and i heard they have good gains compared to some of the aftermarket headers.

[Z U L8R]

i must admit that does look pretty sexy cody....how much does something like that cost?

Dave

[jspaeth]

i must admit that does look pretty sexy cody....how much does something like that cost?

Dave


The extrude honing is pricy....I called for a quote, and I think if you do it through that company (extrude-hone.com or whatever) it is like $400 or something for an exhaust mani, and it's like 4-6 weeks turnover time or something.

Then on top of that, the SwainTech coating is like another $250 or so.

I think both places require you to pay your own shipping to/from.

At the end of the day, it's probably close to $750-$800 total for that.


I really want to do it, and I have the $$$ saved, but I just feel like I would feel so guilty about spending that much money on my car for something like that.....

[codyace]

The extrude honing is pricy....I called for a quote, and I think if you do it through that company (extrude-hone.com or whatever) it is like $400 or something for an exhaust mani, and it's like 4-6 weeks turnover time or something.

Then on top of that, the SwainTech coating is like another $250 or so.

I think both places require you to pay your own shipping to/from.

At the end of the day, it's probably close to $750-$800 total for that.


I really want to do it, and I have the $$$ saved, but I just feel like I would feel so guilty about spending that much money on my car for something like that.....

Extrude hone is roughly (as you said 400) per manifold. What is nice is that you can sometimes find group deals on other turbo 4 cyl manifolds and get a reduced rate.

Another nice thing is that Extrude will ship to swain afterword...which is cheap, as they are roughly 4-5 hours away from each other. Much easier than waiting for it to come back to you, then for you to ship it back out. Always funny as when you talk to them, they know immediatly of where it's going after haha.

Swain is 180 per manifold.


So in the end, you're looking at 580 before shipping, and roughly another 40-60 shipping after, so under 650 total. To me, this is the price point you want to shoot for as it's less than Full Race, and less than Tomei - performs better (or equal at minimum) and you now have no chance of it ever cracking, and you know everything fits perfectly. No warped flanges, no worries...


EDIT: Each place takes (in my experiences) between 5-10 days per process

[240SXsaint]

hey cody thank you for your input that was the answer i was looking for.

[Z U L8R]

i must admit that does look pretty sexy cody, and i totally agree 100% about the stock manifold being much stronger....how much does something like that cost?

i also much rather have the stock manifold instead of a megan or whatever IFFFFFF i was staying t2 turbo....which i never do :P but none the less.

while you're at it , you may as well ceramic coat it so it's better insulated. that'll help keep engine temps down as well as hold in more heat for the turbo.

Dave