1nzfe equal length manifold.

[turboecho2005]

Why do you think that race cars that have had millions of dollars of engineering behind them build manifolds with long runners? Nearly every drag car you see has huge long runners.

Your manifold design isn't a bad one. Its functional and thats what matters.

If i were made of money i would buy your manifold.. put it on my car.. dyno it.. then put on a manifold with longer runners and dyno it. Thats the only realy world test we can do. going back and forth on an internet forum is useless.

[cdydjded]

Originally Posted by turboecho2005

Why do you think that race cars that have had millions of dollars of engineering behind them build manifolds with long runners? Nearly every drag car you see has huge long runners.

Your right most race cars have long runners. And the reasons are many, such as:
1) Their max RPM is not 6300
2) They are not a 1.5 liter
3) They are not using T25 turbos
4) Their power range starts @ +/- 5000 RPM
5) Their inteded for max accelaration
6) They are not daily drivers

FYI, Garm made 350HP on a log style manifold.....

[turboecho2005]

Originally Posted by cdydjded

Your right most race cars have long runners. And the reasons are many, such as:
1) Their max RPM is not 6300
2) They are not a 1.5 liter
3) They are not using T25 turbos
4) Their power range starts @ +/- 5000 RPM
5) Their inteded for max accelaration
6) They are not daily drivers

FYI, Garm made 350HP on a log style manifold.....

A local guy here has a D16 turbocharged with an equal length squid style manifold. Its a 1.6L. It has a rev max of 6800. Its his daily driver and he's putting down over 500hp.

As i said before there is nothing wrong with a log style or non equal length its just not the best possible design. I am just saying that you could yield more hp with properly made equal length manifold.

[Blown_xa]

hey everyone is entitled to there own opinion, its all good. I don't know if you knew or not turboecho, but we have a race car. We did a lot of r&d with it, that is where are production parts derived from for the tc.

posting photos of different manifolds doesnt justify much. r &d does. i have a book on turbocharging in front of me , in another post ill copy what it says for u.
I have no beef with your opinion, It's just that many yaris owners on here are new to turbocharging and soak up info quickly. i think it is only fair they are presented real proven fact and data, rather than mashing opinions. Just because a certain car obtained 1000hp, it doesnt mean that is an ideal design.
the whole el debate, its totally fine if you dont want to call our manifolds el. the gentleman who produces our manifolds had that particular opinion (there is no el manifold) , and others may have another.

[Blown_xa]

"As mentioned in the chapter about turbocharger design, the turbine housing increases exhaust velocity to around 2000 ft per sec. if the exhaust gas comes out of the exhaust port at 300 fps,then we wont gain very much if it is slowed to 100fps just so we can speed it up to 2000 fps. there is nothing wrong with smooth flowing exhaust headers with swerving bends, but in the case of tubocharged engines their use is more estetic than power increasing." - Hugh Maclnnes mechanical engineer,society of automotive engineers.

[xbgod]

And right you are.

But it's hard to argue the point of a dedicated drag car vs. a daily driver. I too have brought this same question up to two different world renouned tuners. Rolo from CFT who is recognized by Haltech, Microtech,AEM and Greddy as a top tuner.And John from LHT Motorsports whih is a top tuner for Hondata.

It's more than just equal lengths of the manifold but also waste gate placement on the exhaust manifold and other various factors which will encourage hp gains or losses.

I'm not saying it's not possible to make more hp with equal lenghts but Have been told with motors of this caliber that not much of a signifigance is noticed to make it worth your while to purse such a cost for so little.

So I guess if 4-6 more hp which is about the typical gain if all is correctly placed is worth the cost to you than it's worth the time.

XBG

[turboecho2005]

I agree. and unless we can dyno prove both cases its still an open ended thread. good for discussion and popcorn :)