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It could be for several reasons. The center port could have more flow in total, or it could just be more turbulent flow, or it could have more total contact time.
I think it has more to do with contact time. A cooler sustained torch flame for example will heat metal much faster than a hotter flame which is only on the metal half the time. Even at higher flow rates the exhaust temperature isn't any hotter, it just has a bit more turbulence from the higher flow. 6ms doesn't seem like a lot of time, but that's per revolution, if you think about it like a percentage it makes a lot more sense.
Just saw this which illustrates what i was taking about erlier in the thread . Speedsource renesis dyno .
I toyed around with different setups for years . These days I run a honeycomb maf straightener . Seems to be the most reliable .
Cool, I was just curious. I run the honeycomb as well as a screen (AEM screen) further up from it. It has been working well but recently the screen got sucked in a bit and my car ran like ****. I am planning on removing it but will need the tune adjusted when I do that so it will have to wait.
Well good luck with everything Brutus, your journey has been very interesting. Im glad to see you fit a gt35 in the low mount.
My turbo guy is trying to shoehorn a gt35 in the low mount position as well, but he may change his mind. I don't think there is an easy way out for him on this one lol.
Well good luck with everything Brutus, your journey has been very interesting. Im glad to see you fit a gt35 in the low mount.
My turbo guy is trying to shoehorn a gt35 in the low mount position as well, but he may change his mind. I don't think there is an easy way out for him on this one lol.
Get him to fit the To4B compressor housing and try again .
Cool, I was just curious. I run the honeycomb as well as a screen (AEM screen) further up from it. It has been working well but recently the screen got sucked in a bit and my car ran like ****. I am planning on removing it but will need the tune adjusted when I do that so it will have to wait.
I gave up on screens even before I fitted my first turbo for that very reason.
No, I don't want to high jack your thread. I'll get into more detail when I start my build thread. But basically plan A (right on the manifold) is out the window, he's gonna discuss other options with me tomorrow. I just know this build is gonna get "ugly fast"
....... Hopefully my car will be ugly fast too.
Yeah my custom CAI is made using a housing with a honeycomb from MRP. I just had them make one with the exact ID specs and length I needed.
It just blows me away how sensitive it is, no other MAF car i have owned was that sensitive to changes. But I got the new lower profile filter in and installed it today and it's fine.
Last edited by 9krpmrx8; Oct 28, 2015 at 12:42 AM.
Hey brett, what boost control Solenoid are you running. The Mac 45 or 46? Are you still liking it? no problems with small increases in duty cycle making big increases in boost?
Hey brett, what boost control Solenoid are you running. The Mac 45 or 46? Are you still liking it? no problems with small increases in duty cycle making big increases in boost?
It's a 46 ..... It works great and I have exceptional boost control . Not really sure how much the 4 port contributes to that as it's all i've run on this setup .
To get 2 psi increase in boost i need to add 5% to duty cycle ...................
ok another note about the boost controller. They seam like you set the hertz, duty cycle, and the pressure they start working the solenoid at. I realize some of them have a over boost cutoff that defaults to the waste gate spring if it's over boosting.
Does it have a target boost and actively try to achieve that boost?
Does it just boost to whatever level you have the solenoid set as long as it's below the over boost level?
Small update :
Engine is finally going back together this week . The hold up was in waiting for the US supplier of the solid corner seals . I gave up on that and decided to just modify the stock Renesis corner seals . A friend in the UK tells me this has been done over there with some success .
Also planning to port the two end exhaust ports (leaving the Siamese alone) to try improve spoolup .
Hope to be back on the road by next week .
Small update :
Engine is finally going back together this week . The hold up was in waiting for the US supplier of the solid corner seals . I gave up on that and decided to just modify the stock Renesis corner seals . A friend in the UK tells me this has been done over there with some success .
Also planning to port the two end exhaust ports (leaving the Siamese alone) to try improve spoolup .
Hope to be back on the road by next week .
How about a road trip to my hood next week? The one way trip is a perfect distance for run in before cranking it up to 400whp
Making some progress . Just mock fitting turbo setup to engine and making a few minor improvements as I go.
Added a heat shield below the turbo and changed the water piping to try improve siphoning as it was glugging a lot.
This pic really highlights the time and skill required to fit it all into such a small space while maintaining the smooth flow in the primaries and collector.
Did the turbo guys check the balance when you sent the turbo unit back? Could contribute to bad spool.
This pic really highlights the time and skill required to fit it all into such a small space while maintaining the smooth flow in the primaries and collector.
Did the turbo guys check the balance when you sent the turbo unit back? Could contribute to bad spool.
changed the water piping to try improve siphoning as it was glugging a lot.
This seems to have worked .... the loud glugging after engine shutdown has gone and now I just hear a swishing noise so I think the turbo water is siphoning perfectly now .
