Semi p-port n/a 20b results and discussion. 421rwhp
#51
Banned. I got OWNED!!!
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No worries, I enjoy discussions on here I checked out the dyno charts, and muffler build. Nice TIG welds btw, looking good. With the torque you are producing and where the torque is at, a improvement with the header is not going to be a walk in the park. But I think its possible! How long are your ITB's? And how aggressive is the street port? And how is the exhaust port? Earlier or later opening/closing? both? Next week I will be starting on some headers, so testing can happen soon
Thanks for the compliments about the welds ... I know a thing or two about welding
Ya, this engine has definately gone through some extensive R&D already lol ... so no one said it was going to be a walk in the park for you :P. As you can tell I'm already down to just playing around with not only degrees of timing but split timing also, so its definetely approaching what I believe is close to its limits with the porting available.
What do you mean by how long are my ITB's? Are you asking the throttle bodies themselves or with the air horns?
As for the porting ... I can't be of too much help ... I'm not an engine builder (yet ) I had it built so I can't be too specific on that. I was told the ports are a bit bigger than average though. The reason being is when I blew up the engine last time (about a couple years ago), when he tried to match both of them together he went a little bigger on both intake and exhaust from what he uses (he has his own templates, he's been racing and building rotaries since the late 70's), the guys around here call him "the bat from hell" lol. Very aggressive driver from trinidad.
What do you think can you do as far power?
I personally believe it could be brought down about 1000 rpm and be able to flatten it out with that 130ft-lb over a broader range a bit. But ya from looking around I'm pushing the same torque as alot of the 13B guys. So we'll see how it goes.
#52
I'm the same way about discussing things in my threads
Thanks for the compliments about the welds ... I know a thing or two about welding
Ya, this engine has definately gone through some extensive R&D already lol ... so no one said it was going to be a walk in the park for you :P. As you can tell I'm already down to just playing around with not only degrees of timing but split timing also, so its definetely approaching what I believe is close to its limits with the porting available.
What do you mean by how long are my ITB's? Are you asking the throttle bodies themselves or with the air horns?
As for the porting ... I can't be of too much help ... I'm not an engine builder (yet ) I had it built so I can't be too specific on that. I was told the ports are a bit bigger than average though. The reason being is when I blew up the engine last time (about a couple years ago), when he tried to match both of them together he went a little bigger on both intake and exhaust from what he uses (he has his own templates, he's been racing and building rotaries since the late 70's), the guys around here call him "the bat from hell" lol. Very aggressive driver from trinidad.
What do you think can you do as far power?
I personally believe it could be brought down about 1000 rpm and be able to flatten it out with that 130ft-lb over a broader range a bit. But ya from looking around I'm pushing the same torque as alot of the 13B guys. So we'll see how it goes.
Thanks for the compliments about the welds ... I know a thing or two about welding
Ya, this engine has definately gone through some extensive R&D already lol ... so no one said it was going to be a walk in the park for you :P. As you can tell I'm already down to just playing around with not only degrees of timing but split timing also, so its definetely approaching what I believe is close to its limits with the porting available.
What do you mean by how long are my ITB's? Are you asking the throttle bodies themselves or with the air horns?
As for the porting ... I can't be of too much help ... I'm not an engine builder (yet ) I had it built so I can't be too specific on that. I was told the ports are a bit bigger than average though. The reason being is when I blew up the engine last time (about a couple years ago), when he tried to match both of them together he went a little bigger on both intake and exhaust from what he uses (he has his own templates, he's been racing and building rotaries since the late 70's), the guys around here call him "the bat from hell" lol. Very aggressive driver from trinidad.
What do you think can you do as far power?
I personally believe it could be brought down about 1000 rpm and be able to flatten it out with that 130ft-lb over a broader range a bit. But ya from looking around I'm pushing the same torque as alot of the 13B guys. So we'll see how it goes.
#53
Banned. I got OWNED!!!
iTrader: (2)
So am I measuring Primaries or secondaries or both?
If I can reach those levels that would be sweet ... but I'm not getting my hope that high up yet :P
What intake length do you think the SDJ was made for?
Lastly, do you think the principles would be the same for supercharging it? As in the resonance out of the exhaust would still be the same?
If I can reach those levels that would be sweet ... but I'm not getting my hope that high up yet :P
What intake length do you think the SDJ was made for?
Lastly, do you think the principles would be the same for supercharging it? As in the resonance out of the exhaust would still be the same?
#55
Banned. I got OWNED!!!
iTrader: (2)
Well did my best at measuring out the length ... not sure whether it ended up in the primaries or secondaries ... but its roughly 18" to the bell mouth of the velocity stack.
Here's a couple very old pictures of the setup minus the 1/2" spacer inbetween the upper and lower intake manifold as previously mentioned:
https://www.rx7club.com/attachment.p...4&d=1208145798
https://www.rx7club.com/attachment.p...5&d=1208145798
Excuse the messy look in those pictures, I was just putting everything in that new, freshly painted shell at the time.
Here's a couple very old pictures of the setup minus the 1/2" spacer inbetween the upper and lower intake manifold as previously mentioned:
https://www.rx7club.com/attachment.p...4&d=1208145798
https://www.rx7club.com/attachment.p...5&d=1208145798
Excuse the messy look in those pictures, I was just putting everything in that new, freshly painted shell at the time.
#56
So am I measuring Primaries or secondaries or both?
If I can reach those levels that would be sweet ... but I'm not getting my hope that high up yet :P
What intake length do you think the SDJ was made for?
Lastly, do you think the principles would be the same for supercharging it? As in the resonance out of the exhaust would still be the same?
If I can reach those levels that would be sweet ... but I'm not getting my hope that high up yet :P
What intake length do you think the SDJ was made for?
Lastly, do you think the principles would be the same for supercharging it? As in the resonance out of the exhaust would still be the same?
Well did my best at measuring out the length ... not sure whether it ended up in the primaries or secondaries ... but its roughly 18" to the bell mouth of the velocity stack.
Here's a couple very old pictures of the setup minus the 1/2" spacer inbetween the upper and lower intake manifold as previously mentioned:
https://www.rx7club.com/attachment.p...4&d=1208145798
https://www.rx7club.com/attachment.p...5&d=1208145798
Excuse the messy look in those pictures, I was just putting everything in that new, freshly painted shell at the time.
Here's a couple very old pictures of the setup minus the 1/2" spacer inbetween the upper and lower intake manifold as previously mentioned:
https://www.rx7club.com/attachment.p...4&d=1208145798
https://www.rx7club.com/attachment.p...5&d=1208145798
Excuse the messy look in those pictures, I was just putting everything in that new, freshly painted shell at the time.
#59
Banned. I got OWNED!!!
iTrader: (2)
Well I suppose i could always ask someone that might also have it up for sale .. either way I could probably find a way
Out of curiosity what part of Ohio are you in? I might be stopping in Cleveland with a friend who's interested in purchasing a 1914 Ford Model T in the near future.
Out of curiosity what part of Ohio are you in? I might be stopping in Cleveland with a friend who's interested in purchasing a 1914 Ford Model T in the near future.
#60
Banned. I got OWNED!!!
Join Date: Aug 2009
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Im sorry i just can't stop
#61
Old [Sch|F]ool
Well I suppose i could always ask someone that might also have it up for sale .. either way I could probably find a way
Out of curiosity what part of Ohio are you in? I might be stopping in Cleveland with a friend who's interested in purchasing a 1914 Ford Model T in the near future.
Out of curiosity what part of Ohio are you in? I might be stopping in Cleveland with a friend who's interested in purchasing a 1914 Ford Model T in the near future.
...wait, what?
#62
Well I suppose i could always ask someone that might also have it up for sale .. either way I could probably find a way
Out of curiosity what part of Ohio are you in? I might be stopping in Cleveland with a friend who's interested in purchasing a 1914 Ford Model T in the near future.
Out of curiosity what part of Ohio are you in? I might be stopping in Cleveland with a friend who's interested in purchasing a 1914 Ford Model T in the near future.
#65
Banned. I got OWNED!!!
iTrader: (2)
I haven't forgot about this yet, I just got really busy since then and we had a lovely snow storm the past few dayys and prob the next day or two, so I'll get to it as soon as things clear up. I currently have over 4 feet of snow on my front lawn from the past 3 days .... I'm still having a blast with it though in the snow
#66
I haven't forgot about this yet, I just got really busy since then and we had a lovely snow storm the past few dayys and prob the next day or two, so I'll get to it as soon as things clear up. I currently have over 4 feet of snow on my front lawn from the past 3 days .... I'm still having a blast with it though in the snow
On a separate note, I have been getting emails and IM's about seeing more semi p-port pics. So a few days ago I took some better pics from a recent set we did for a turbo setup. We are starting to have these pre-made and in stock. Also can do the service to a sent in rotor housing.
Last edited by GtoRx7.; 12-09-10 at 12:50 AM.
#67
Do a barrel roll!
iTrader: (4)
Logan have you done any full P-port engine builds? I know that most PPorts that are done are primarily track focused, which is where alot of people get the misconceptions that they cannot have a nice idle and streetable car with them. If done right with mild-sized ports and not to crazy timing/overlap they can be quite street friendly while still making power. Just wondered if you've ever played around with that just to avoid the complexity of the semi-pport system (not that its really that bad, just curious).
#68
Logan have you done any full P-port engine builds? I know that most PPorts that are done are primarily track focused, which is where alot of people get the misconceptions that they cannot have a nice idle and streetable car with them. If done right with mild-sized ports and not to crazy timing/overlap they can be quite street friendly while still making power. Just wondered if you've ever played around with that just to avoid the complexity of the semi-pport system (not that its really that bad, just curious).
#69
Semi P-PORT
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This is perfect timing really...
After I'm bored of the semi p-port/ street port 13b turbo setup in my RX-8, this will have to be the next route as I was orginally going to do a N/A 3 rotor build but decided against... This motivates me as now I can just go to you guys.
After I'm bored of the semi p-port/ street port 13b turbo setup in my RX-8, this will have to be the next route as I was orginally going to do a N/A 3 rotor build but decided against... This motivates me as now I can just go to you guys.
#71
High Comp Booster
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This thread is making me want to give up turbo power
Quick couple of questions, for the semi p-ports are you using steel or aluminum in there for the sleeve?
Pros, cons?
What is the cost on the service? to do Semi p-port housings?
What Can I expect out of a similar 13b over a 20b?
And if you dont mind sharing what Lengths did you end up with on your header from flange to collector?
I really love this thread lmao
Quick couple of questions, for the semi p-ports are you using steel or aluminum in there for the sleeve?
Pros, cons?
What is the cost on the service? to do Semi p-port housings?
What Can I expect out of a similar 13b over a 20b?
And if you dont mind sharing what Lengths did you end up with on your header from flange to collector?
I really love this thread lmao
#72
DRIVE THE ROTARY SPORTS
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No problem, driving Rx's in the snow is always a good way to enjoy the bad weather!
On a separate note, I have been getting emails and IM's about seeing more semi p-port pics. So a few days ago I took some better pics from a recent set we did for a turbo setup. We are starting to have these pre-made and in stock. Also can do the service to a sent in rotor housing.
On a separate note, I have been getting emails and IM's about seeing more semi p-port pics. So a few days ago I took some better pics from a recent set we did for a turbo setup. We are starting to have these pre-made and in stock. Also can do the service to a sent in rotor housing.
Also what's the going rate to do semi-pp some housings?
-Heath
#73
Rotor Head Extreme
iTrader: (8)
#74
This thread is making me want to give up turbo power
Quick couple of questions, for the semi p-ports are you using steel or aluminum in there for the sleeve?
Pros, cons?
What is the cost on the service? to do Semi p-port housings?
What Can I expect out of a similar 13b over a 20b?
And if you dont mind sharing what Lengths did you end up with on your header from flange to collector?
I really love this thread lmao
Quick couple of questions, for the semi p-ports are you using steel or aluminum in there for the sleeve?
Pros, cons?
What is the cost on the service? to do Semi p-port housings?
What Can I expect out of a similar 13b over a 20b?
And if you dont mind sharing what Lengths did you end up with on your header from flange to collector?
I really love this thread lmao
And I am glad you like our work
The sleeves are pressed in correct? If so, aren't they cylindrical machined tubes? I would think that unless they are a perfect fit they could move around (in would be the worst case scenario lol) as they heat cycle.
Also what's the going rate to do semi-pp some housings?
-Heath
Also what's the going rate to do semi-pp some housings?
-Heath
Thanks T-von!
Last edited by GtoRx7.; 12-14-10 at 12:26 AM.