Stainless equal-pulse header

dangerous06

dangerous06

diesel tech
Joined
Mar 24, 2008
Messages
3,564
Cumminsheader.jpg
Is there any benefit to using one?
 
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I would gander not as good as a 2nd gen polydyne header

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No experience myself, however this topic get brought back to life about once every 6months - the consensus is it's not a 'drop in and see a big improvement' kind of thing. (Else we would all be buying them and not any of these other machined and welded manifolds)
 
If I recall correctly folks said they said the bottom end power wasn't very good with them.

I am guessing the top one is SS as well.
 
zstroken said:
If I recall correctly folks said they said the bottom end power wasn't very good with them.

I am guessing the top one is SS as well.
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That's what I always hear as well. The tubular is more of a higher RPM design. Makes sense to me since the log style has lest distance to travel and acts more like an insulator with it being thick cast. That heat spools a turbo quicker, giving it length and thinner walls just takes that heat away some.
 
Glad I am not the only one that thought that. For the price I don't see why people would use them
 
Hurley said:
I would gander not as good as a 2nd gen polydyne header
No experience myself, however this topic get brought back to life about once every 6months - the consensus is it's not a 'drop in and see a big improvement' kind of thing. (Else we would all be buying them and not any of these other machined and welded manifolds)
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What's the price on these?
 
I don't think they are being made anymore? (the polydyne units)
 
2300 hp, single turbo. diesel only. log manifolds.

just sayin.


also formula 1 cars are going to log type manifolds this year, instead of headers.
 
There HAS to be a lot of volume there to hurt response. Also, it looks kind of like the exhaust flow would be similar to a interchange off a disney or looney toons cartoon?
 
beh, I've seen longer headers (Banks)....I'd say turbine and housing selection plays more hell with response, and the merge's not that bad, just not optimum.
 
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I'm very interested in these setups especially the 450 shipped part lmao.
So from what you guys are saying it takes longer to spool? Because I can't handle anymore lag haha
 
The results arent much different if you put a steed speed comp manifold on a street truck. You lose spool because its not sized correctly for the application.
 
Dano that's sucks so these are for more track and sled vehicles then and not for dd? I'd live to open my hood and see this though haha
 
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I have a Polydyn header and no issues on the low end at all. Rolling into it from low RPM I get 3-4psi boost with my Garrett GT3788R at 1200 RPM. Great daily driver. Has the .89AR housing but I still have the stock cam. The Polydyn is a high quality piece.
 
VMacKenzie said:
I have a Polydyn header and no issues on the low end at all. Rolling into it from low RPM I get 3-4psi boost with my Garrett GT3788R at 1200 RPM. Great daily driver. Has the .89AR housing but I still have the stock cam. The Polydyn is a high quality piece.
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I had great luck with mine as well. Spooled my 467.7/87/.90 just above 1400 rpm and EGTs never got above 1100*. No issues with cracks either.
 
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