"Best" Exhaust Manifold for FD Single Turbo?
#52
10000 RPM Lane
iTrader: (2)
it’s welded too, heaven forbid …
I’m not too worried about different or disagreeing opinions, others can do as they will.
some people think I’m always digging on Rob, but no. I was beating the drum loudly over the 3R, but when he’s putting a G35-1050 with a 1.21 Vband and calling it the best manifold ever made or a G40-900 on a choked-up, mostly stock T2, I’m going to point it out for what it is.
So congrats and hats off on making the changes that they did with the G40/T2 engine combo and showing the true potential. The response vs peak output difference of the 0.84 A/R housing in lieu of the 1.06 would be interesting to see. There are a number of things yet to be proven over certain differences of opinion. It will all eventually prove itself out one way or the other though.
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I’m not too worried about different or disagreeing opinions, others can do as they will.
some people think I’m always digging on Rob, but no. I was beating the drum loudly over the 3R, but when he’s putting a G35-1050 with a 1.21 Vband and calling it the best manifold ever made or a G40-900 on a choked-up, mostly stock T2, I’m going to point it out for what it is.
So congrats and hats off on making the changes that they did with the G40/T2 engine combo and showing the true potential. The response vs peak output difference of the 0.84 A/R housing in lieu of the 1.06 would be interesting to see. There are a number of things yet to be proven over certain differences of opinion. It will all eventually prove itself out one way or the other though.
.
#53
Rotary Freak
iTrader: (8)
From the many plug reads I have done while tuning at the shop. Intake manifold is the biggest influencer of variance in fueling between rotors. I have also had many instances where the rotor with the Hotter EGT doesn't end up being the one that fails. Nor does it register as the hot rotor (on EGT) when doing a plug read.
A good back to back for me on this one was changing from an OEM FD intake to Typhoon, EGT's showed Rear rotor being hotter, Plugs showed Front rotor being hotter. I decided not to do any fuel trims and when we pushed that engine hard it was the front rotor that failed, not the rear.
Take from that what you will, but plugs has always been the most accurate form of data to do rotor trimming and intake seems to sway it more than anything else. Can't see I have ever changed an exhaust manifold and seen a change in the plug read as a result. Not saying it is not possible, just saying It's not something I have seen
A good back to back for me on this one was changing from an OEM FD intake to Typhoon, EGT's showed Rear rotor being hotter, Plugs showed Front rotor being hotter. I decided not to do any fuel trims and when we pushed that engine hard it was the front rotor that failed, not the rear.
Take from that what you will, but plugs has always been the most accurate form of data to do rotor trimming and intake seems to sway it more than anything else. Can't see I have ever changed an exhaust manifold and seen a change in the plug read as a result. Not saying it is not possible, just saying It's not something I have seen
Last edited by rx72c; 03-04-24 at 10:44 PM.
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#55
Rotary Freak
iTrader: (8)
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scotty305 (03-18-24)
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#60
GSSL-SE
iTrader: (1)
the future is closer than most people realize to avoid the generic vendor compromises and limitations:
https://youtu.be/rJtX_xwq_4M
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https://youtu.be/rJtX_xwq_4M
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Had some printed parts quoted recently for another application and I was very surprised at how reasonable it was. Hopefully we see more of this in the future!!!
#63
Rotary Freak
^^^ It's nicely made, but......wince each time I see what seems like every Nth American use angle grinders without cutting guards - to spread it on to the next youtube guy to copy cat. **** me, don't know anybody locally here who hasn't exploded a cutting disc or ten!
#65
10000 RPM Lane
iTrader: (2)
the same guy that 3D printed the inconel turbo manifold released another vid a week or two later for a 3D printed intake manifold. It will warm mr2peak’s heart to know he only put a Bosch 68mm DBW throttle body on it. It ended up as a shorter runner single piece rather than upper/lower 2 piece with a water-air intercooler welded in the middle of the plenum.
In the original video that started this particular series, he bought a 13B-REW from an FD3 that burned down in a fire for $950 on eBay. When he tore it down it was in near perfect condition with a beautiful street port, 12mm studs, lightened S4 8.5CR rotors etc. Luckiest find ever …
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In the original video that started this particular series, he bought a 13B-REW from an FD3 that burned down in a fire for $950 on eBay. When he tore it down it was in near perfect condition with a beautiful street port, 12mm studs, lightened S4 8.5CR rotors etc. Luckiest find ever …
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estevan62274 (05-18-24)
#66
Rotary Freak
#67
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#68
10000 RPM Lane
iTrader: (2)
is that antagonizing, or me just referring back to our disagreement on that particular aspect of rotary engine tech as one man to another?
Which for those who didn’t see the thread, it goes back to the AU company Plazmaman stating that in their extensive intake manifold experience, a 70mm-74mm DBW single-plate throttle body is sufficient for 1000 hp on a reciprocating piston turbo engine. Which equates to ~700 - 750 rotary turbo engine hp relative to accepted mass flow rate difference between the two.
but just so we’re clear; I don’t consider your post questioning my intent to be antagonizing at all. Please always feel free to ask or say exactly what’s on your mind. Maybe you should go back and refer to the comments he made to me there even. Which I didn’t consider them antagonizing, but merely responded to the challenge with the facts as I understood them.
That being, there are many 13B turbo engines using 3” OD intercooler piping (~73mm ID @ 16 Ga thickness) and the total combined length/bends and resulting dP is going to be a lot greater than the 3” long 70-74mm ID TB with a milled shaft and plate in the center of it. It would also be fairly simple to measure the dP across the inlet to outlet as well rather than play the internet forum supposition game.
I’m also not a victim, but pointed out the hypocrisy for the off topic statements he pursued about my personal beliefs and commitments.
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Which for those who didn’t see the thread, it goes back to the AU company Plazmaman stating that in their extensive intake manifold experience, a 70mm-74mm DBW single-plate throttle body is sufficient for 1000 hp on a reciprocating piston turbo engine. Which equates to ~700 - 750 rotary turbo engine hp relative to accepted mass flow rate difference between the two.
but just so we’re clear; I don’t consider your post questioning my intent to be antagonizing at all. Please always feel free to ask or say exactly what’s on your mind. Maybe you should go back and refer to the comments he made to me there even. Which I didn’t consider them antagonizing, but merely responded to the challenge with the facts as I understood them.
That being, there are many 13B turbo engines using 3” OD intercooler piping (~73mm ID @ 16 Ga thickness) and the total combined length/bends and resulting dP is going to be a lot greater than the 3” long 70-74mm ID TB with a milled shaft and plate in the center of it. It would also be fairly simple to measure the dP across the inlet to outlet as well rather than play the internet forum supposition game.
I’m also not a victim, but pointed out the hypocrisy for the off topic statements he pursued about my personal beliefs and commitments.
.
Last edited by TeamRX8; 05-21-24 at 12:19 AM.
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