So I have this DSM buddy and him and his brother have been building them for years, and I was talking to him the other day and he said something about how he welded angles in his exhaust ports to spool the turbo faster, and He didn't get into it much, but I picture it working kind of like those gay "tornado" things but only for each runner, creating a vortex and spiraling the air spinning the turbine. Now it seems like this would work, but it is prolly some BS and I have never heard to this before, and I just wanted to see if any of you guys have heard of this. BTW, the car he suposedly did this to did 10.50's (1st gen, built, 60-1, 17's, AFT! ) Thanks guys.

 

you know dsm guys. whatever he welded in probably came from home depot

 

HAHAHA, exactley. It makes sense in how it works, but I can think of anything that would withstand 1600 degree temps and 30+psi of pressure without breaking off and taking out the turbo.

 

there are some duramax guys in my area that do the same thing but to their downpipe. they believe it does the same thing as what you believe, help with the vortex thing....their farm boys so they probably stick welded that crap in.

 

Well, I was thinking, that if there was any truth to this, and if it was a significant difference, and after testing etc the design, you could almost have some mini "tornados" CNC'd that could just be welded to the head flange on the manifold and that woudld prolly work, but like I said, It would have to be a big difference to even persue such a project. I will have to ask him what he did next time.

 

its probably in the 02 housing...where they attempt to separate the turbine discharge from the wastegate discharge.

 

As if a 4G needs anymore help at flowing like crap If they would bump the compression up a bit they might learn something. I chose the easy way out...150 shot in first gear in my EVO sticks your butt in the seat

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jared &raquo;</TD></TR><TR><TD CLASS="quote">you know dsm guys. whatever he welded in probably came from home depot</TD></TR></TABLE>

Just use this in there..

https://www.mightyputty.com/sp...me=10

 

yeah that stuffs great^^^ worked wonders when installing my cage

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4piston &raquo;</TD></TR><TR><TD CLASS="quote">As if a 4G needs anymore help at flowing like crap If they would bump the compression up a bit they might learn something.</TD></TR></TABLE>

well said.

 

Flow like crap huh? Guess you've never head of M2.

 

Redesigning and reshaping ports have been around forever. It only benefits on some applications where you can increase velocity or volume. I believe on the DSM guys, they add material on the upper part of the intake ports on certain model cylinder heads. Its kinda like how some people port B-series head ports square, I think Jerry built does this.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by G2K &raquo;</TD></TR><TR><TD CLASS="quote">Flow like crap huh? </TD></TR></TABLE>

When compared to other manufacturers heads, yes.

 

I would say 2G Heads flow like crap, but the 1Gs don't flow much worse then a stock b16a head.

 

Wow.. Welcome to mis-informationville. Honda-tech never changes.

 

I guess I should have mentioned that I own both a honda and a dsm, which is getting some 42r loving The 2G had is perfect for a street head, and the 1G head is better for higher rpms. But just so you all know a properly ported DSM head will outflow any B16 head any day of the week. I've seen it plently of times.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by G2K &raquo;</TD></TR><TR><TD CLASS="quote">I guess I should have mentioned that I own both a honda and a dsm, which is getting some 42r loving The 2G had is perfect for a street head, and the 1G head is better for higher rpms. But just so you all know a properly ported DSM head will outflow any B16 head any day of the week. I've seen it plently of times.</TD></TR></TABLE>

really...dsm guys run twice the boost to make the same power as honda's running stock port heads at 1/2 the boost....

 

i love how all the die hard honda owners always have something bad to say about other manufacturers engines. i say the 4g and dohc vtec engine are badass personally and im sure a 4g63 with simlar mods and turbos would be very close in power to a honda engine at the same boost levles providing tuning is there.


mike

 

It has nothing to do with die hard Hondas guys, it's just the facts.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by G2K &raquo;</TD></TR><TR><TD CLASS="quote">Flow like crap huh? Guess you've never head of M2.</TD></TR></TABLE>

That statement alone shows how many good flowing 4G heads you haven't seen LOL. It was a joke man...a joke. I drive a 4G every day. Carry on.

 

probably welding up the exhaust port to increase velocity.

 

when you look there is a huge difference in a head that has a welded chamber and 1 that does not.

I had the impression that this type of work was common for all motor cars rather than turbo cars. I understand a little bit of how it works and why they do it but I have never seen any real data supporting their theory.

Alaniz technologies wrote down a report on his website.

 

Mitsu heads flow pretty well. I think they can use some help, but aren't that bad to start with - especially for a 6-8k revving motor. How many Hondas are out there on gas running 8's with no nitrous? I've done this on a 2g mitsu head. Also, how many Hondas are making over 1000whp on GT42's with gas and no nitrous? There are several mitsu's doing this (mostly EVO's).

Kevin

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dreadcivicturbo &raquo;</TD></TR><TR><TD CLASS="quote">

really...dsm guys run twice the boost to make the same power as honda's running stock port heads at 1/2 the boost....</TD></TR></TABLE>

7.8 vs. 11.0 to 1 compression ration, hmmm. Wonder if that has anything to do with it. BTW the fastest 4cyl in the world isn't made by Honda.

 

how many fwd mitsu's do u see running 8's?...or how about 7's?....pound for pound b or k series honda motors will out power a dsm motor any day of the week... you look at a lot of these evos and they are runnin 45-50 psi on 70mm 42's to make 750-800....most of the 800+ honda motors are running around 35-40psi to make that power

and as for the fastest 4cyl car being brent rau's car.(running near 70psi)...tell me how many rwd modified honda 4cyl powered cars you have seen?....