Is This A High Port Sr20de
Blue93G20
10-22-2001, 05:16 PM
IS THIS A HIGH PORT SR20DE:confused:
http://www.se-r.net/multimedia/pictures/sentra_se-r/sean_bruce/mvc-032f.jpg
I HOPE SO....YEAH THE MOTOR LOOKS LIKE SHIT...CAN ANYONE CONFIRM THIS IS A HIGH PORT?
http://www.se-r.net/multimedia/pictures/sentra_se-r/sean_bruce/mvc-032f.jpg
I HOPE SO....YEAH THE MOTOR LOOKS LIKE SHIT...CAN ANYONE CONFIRM THIS IS A HIGH PORT?
Apeman
10-22-2001, 05:29 PM
I do believe that is a high port. If the throttle body is down low than the intake curves up and the ports are high on the engine.
Someone please correct me if I am making a monkey out of myself.
Someone please correct me if I am making a monkey out of myself.
AznVirus
10-22-2001, 05:34 PM
yes that is a high port engine. IIRC its 93.5 and before that had these engines.
P10DET
10-22-2001, 09:02 PM
Originally posted by Blue93G20
IS THIS A HIGH PORT SR20DE:confused:
http://www.se-r.net/multimedia/pictures/sentra_se-r/sean_bruce/mvc-032f.jpg
I HOPE SO....YEAH THE MOTOR LOOKS LIKE SHIT...CAN ANYONE CONFIRM THIS IS A HIGH PORT?
Yes indeed it is.
IS THIS A HIGH PORT SR20DE:confused:
http://www.se-r.net/multimedia/pictures/sentra_se-r/sean_bruce/mvc-032f.jpg
I HOPE SO....YEAH THE MOTOR LOOKS LIKE SHIT...CAN ANYONE CONFIRM THIS IS A HIGH PORT?
Yes indeed it is.
GoodJuan
10-22-2001, 09:05 PM
Wat's hi port? Is it a good thing?
Apeman
10-22-2001, 09:30 PM
The general consensus on the high port is that it flows better and makes more power at the high end.
It is believed that the low port has better low end power but does not have the high end breathing capability of the high port.
In the end I don't think the difference is all that significant and both respond well to mods.
It is believed that the low port has better low end power but does not have the high end breathing capability of the high port.
In the end I don't think the difference is all that significant and both respond well to mods.
JustinP10
10-22-2001, 09:46 PM
There was also a slight difference in cams between the low port and the high port motors. I believe this makes one of the biggest differences in high end power. The high port makes a little more power after peak. As far as responding to mods, it depends on which ones you are talking about. I've noticed certain mods seem to be a little more effect on one motor or the other (but it may have just been one car or the other). So take it for what it's worth (and that's probably not too much) :D
P10DET
10-22-2001, 09:55 PM
Originally posted by JustinP10
There was also a slight difference in cams between the low port and the high port motors. I believe this makes one of the biggest differences in high end power. The high port makes a little more power after peak. As far as responding to mods, it depends on which ones you are talking about. I've noticed certain mods seem to be a little more effect on one motor or the other (but it may have just been one car or the other). So take it for what it's worth (and that's probably not too much) :D
No, you are quite correct. With all the dyno days SERCA has been holding in SoCal, they've been getting pretty good data. It seems the low port really likes the S series cams - more so it seems than the high port. OTOH, the high port seems to like the C series cams better than the low port - but nobody with a low port has made enough tuning effort to be able to say that definitively. It seems to make some sense though since the C series cams pull like a MOTHER to redline.
I think the same has been found for other mods as well, so I think you are 100% correct based upon anecdotal evidence.
There was also a slight difference in cams between the low port and the high port motors. I believe this makes one of the biggest differences in high end power. The high port makes a little more power after peak. As far as responding to mods, it depends on which ones you are talking about. I've noticed certain mods seem to be a little more effect on one motor or the other (but it may have just been one car or the other). So take it for what it's worth (and that's probably not too much) :D
No, you are quite correct. With all the dyno days SERCA has been holding in SoCal, they've been getting pretty good data. It seems the low port really likes the S series cams - more so it seems than the high port. OTOH, the high port seems to like the C series cams better than the low port - but nobody with a low port has made enough tuning effort to be able to say that definitively. It seems to make some sense though since the C series cams pull like a MOTHER to redline.
I think the same has been found for other mods as well, so I think you are 100% correct based upon anecdotal evidence.
FlossinPrimera
10-22-2001, 10:33 PM
HMMM, my high port doesn't look like that, it has a cover over the whole assymbly. What gives?http://www.sr20de.net/multimedia/pictures/200sx_se-r/alfonso_cortina/engine.jpg
As you can see here where the intake tubing runs into the manifold, there is this cover. That is what mine looks like.
As you can see here where the intake tubing runs into the manifold, there is this cover. That is what mine looks like.
JustinP10
10-22-2001, 10:37 PM
You high port looks suprisingly like a low port :jump:
You actually have a low port motor in your car. What model do you have? It almost looks like a Sentra engine bay? (mainly due to the placement of the radiator overflow tank)
(edit) opps, i'm stupid I see it right in your signature... heh:biggrin2:
You actually have a low port motor in your car. What model do you have? It almost looks like a Sentra engine bay? (mainly due to the placement of the radiator overflow tank)
(edit) opps, i'm stupid I see it right in your signature... heh:biggrin2:
FlossinPrimera
10-22-2001, 10:38 PM
Here's a better picture of what I'm talking about. It is in the non shaded region of the picture.
Apeman
10-22-2001, 10:39 PM
That's a low port, and it looks like a 200sx.
FlossinPrimera
10-22-2001, 10:40 PM
Ok, neither of those are my engine, but that is what I'm talking about, I have a 94 G20 (production date 1/94). It has a 7500RPM redline (indicative of high port, the low ports had a 7250RPM redline if I recall correctly)
T4 Primera
10-22-2001, 10:42 PM
Originally posted by FlossinPrimera
HMMM, my high port doesn't look like that, it has a cover over the whole assymbly. What gives?http://www.sr20de.net/multimedia/pictures/200sx_se-r/alfonso_cortina/engine.jpg
As you can see here where the intake tubing runs into the manifold, there is this cover. That is what mine looks like. If that is your engine in the pic, then your engine is a LOW port motor.
My T4 is a '91 high port engine AND it has a 7500rpm redline.:D
HMMM, my high port doesn't look like that, it has a cover over the whole assymbly. What gives?http://www.sr20de.net/multimedia/pictures/200sx_se-r/alfonso_cortina/engine.jpg
As you can see here where the intake tubing runs into the manifold, there is this cover. That is what mine looks like. If that is your engine in the pic, then your engine is a LOW port motor.
My T4 is a '91 high port engine AND it has a 7500rpm redline.:D
JustinP10
10-22-2001, 10:43 PM
Originally posted by FlossinPrimera
Ok, neither of those are my engine, but that is what I'm talking about, I have a 94 G20 (production date 1/94). It has a 7500RPM redline (indicative of high port, the low ports had a 7250RPM redline if I recall correctly)
HAHA, well that would explain why it looks alot like a Sentra engine bay :D The redline I believe, is the difference between an auto and 5-spd G20. I believe all p10's have the same redline (autos are all 7250 i think, and 5-spds all 7500) Those numbers may be off, but i think it's around there.
Ok, neither of those are my engine, but that is what I'm talking about, I have a 94 G20 (production date 1/94). It has a 7500RPM redline (indicative of high port, the low ports had a 7250RPM redline if I recall correctly)
HAHA, well that would explain why it looks alot like a Sentra engine bay :D The redline I believe, is the difference between an auto and 5-spd G20. I believe all p10's have the same redline (autos are all 7250 i think, and 5-spds all 7500) Those numbers may be off, but i think it's around there.
FlossinPrimera
10-22-2001, 10:44 PM
I thought they quit putting low ports in in 93.5 model year. When driving my rev limiter is 8000RPM (I know I've bounced off of it before). I think I got screwed, I know that the engine I have is the original because this car has been in my family since new.
JustinP10
10-22-2001, 10:48 PM
Do you have a JWT ecu, or other piggyback computer? If not your tach is VERY optimistic! :eek: :D
FlossinPrimera
10-22-2001, 10:51 PM
Nope, all stock computer.
Ok here is a pic of a P11 G20 (which we all know to have the high port), it has the funky cover.http://www.g20.net/images/rr_lukec07.jpg
Ok here is a pic of a P11 G20 (which we all know to have the high port), it has the funky cover.http://www.g20.net/images/rr_lukec07.jpg
T4 Primera
10-22-2001, 10:54 PM
Originally posted by FlossinPrimera
I thought they quit putting low ports in in 93.5 model year. I think you've got that backwards - the high port engines are the earlier ones. Remember, plenum/throttle body on top = lo port vs plenum/throttle body underneath = high port. P11s are LO port engines.
I thought they quit putting low ports in in 93.5 model year. I think you've got that backwards - the high port engines are the earlier ones. Remember, plenum/throttle body on top = lo port vs plenum/throttle body underneath = high port. P11s are LO port engines.
RYANS
10-22-2001, 10:59 PM
Does anyone make a cold air intake forthe high port manifold? If anyone makes a cai for it does it run to the manifold--any input will be appreciated.
FlossinPrimera
10-22-2001, 10:59 PM
Ok. now I've gone crosseyed. . .:bloated:
T4 Primera
10-22-2001, 11:13 PM
Originally posted by FlossinPrimera
Ok. now I've gone crosseyed. . .:bloated:
Ok, here's the good oil.
The earlier engines have the high ports (where the intake runners attach to the head), and the throttle body and plenum chamber (which is what you call the funky cover) is mounted underneath the intake manifold. That is, on the high port engines, the intake manifold runners curve UPWARDS from the throttle body/plenum, and into the cylinder head intake ports.
The later low port engines have the throttle body and plenum chamber mounted on top of the intake manifold (like in the P11 pic) so that the runners curve DOWNWARDS from the throttle body/plenum chamber and into the cylinder head intake ports.
IIRC, the reason they changed the position of the intake ports in the cylinder head was because, in the newer low port engine, they could avoid having so much of the intake valve guide protruding into the intake port. This was only of limited success because the low port position meant that the intake flow had to turn 90degrees to enter the cylinder. The older high port cylinder heads allowed the intake flow to approach the intake valve at a 45degree angle.
Clear as mud??
Ok. now I've gone crosseyed. . .:bloated:
Ok, here's the good oil.
The earlier engines have the high ports (where the intake runners attach to the head), and the throttle body and plenum chamber (which is what you call the funky cover) is mounted underneath the intake manifold. That is, on the high port engines, the intake manifold runners curve UPWARDS from the throttle body/plenum, and into the cylinder head intake ports.
The later low port engines have the throttle body and plenum chamber mounted on top of the intake manifold (like in the P11 pic) so that the runners curve DOWNWARDS from the throttle body/plenum chamber and into the cylinder head intake ports.
IIRC, the reason they changed the position of the intake ports in the cylinder head was because, in the newer low port engine, they could avoid having so much of the intake valve guide protruding into the intake port. This was only of limited success because the low port position meant that the intake flow had to turn 90degrees to enter the cylinder. The older high port cylinder heads allowed the intake flow to approach the intake valve at a 45degree angle.
Clear as mud??
P10DET
10-22-2001, 11:14 PM
Originally posted by FlossinPrimera
Ok, neither of those are my engine, but that is what I'm talking about, I have a 94 G20 (production date 1/94). It has a 7500RPM redline (indicative of high port, the low ports had a 7250RPM redline if I recall correctly)
OK, what would it take to convince you that's a low port? ;)
Ok, neither of those are my engine, but that is what I'm talking about, I have a 94 G20 (production date 1/94). It has a 7500RPM redline (indicative of high port, the low ports had a 7250RPM redline if I recall correctly)
OK, what would it take to convince you that's a low port? ;)
P10DET
10-22-2001, 11:15 PM
Originally posted by FlossinPrimera
I thought they quit putting low ports in in 93.5 model year.
No, they stopped putting high ports in the cars beginning in 94. IOW, 94 is the first year of the low port.
I thought they quit putting low ports in in 93.5 model year.
No, they stopped putting high ports in the cars beginning in 94. IOW, 94 is the first year of the low port.
P10DET
10-22-2001, 11:17 PM
Originally posted by FlossinPrimera
Nope, all stock computer.
Actually, you do have an optimistic tach.
Originally posted by FlossinPrimera
Ok here is a pic of a P11 G20 (which we all know to have the high port), it has the funky cover.
No, we all know the P11 has the low port engine. :D
Nope, all stock computer.
Actually, you do have an optimistic tach.
Originally posted by FlossinPrimera
Ok here is a pic of a P11 G20 (which we all know to have the high port), it has the funky cover.
No, we all know the P11 has the low port engine. :D
FlossinPrimera
10-22-2001, 11:17 PM
Ok fine its a low port, I always thought that the high ports were the newer engines. Oh well, change isn't easy.
T4 Primera
10-22-2001, 11:23 PM
Originally posted by FlossinPrimera
Ok fine its a low port, I always thought that the high ports were the newer engines. Oh well, change isn't easy. :) :) Hey, we're all here to learn right? It took me a little while to get my head around too.:) :)
Ok fine its a low port, I always thought that the high ports were the newer engines. Oh well, change isn't easy. :) :) Hey, we're all here to learn right? It took me a little while to get my head around too.:) :)
P10DET
10-22-2001, 11:25 PM
Originally posted by T4 Primera
IIRC, the reason they changed the position of the intake ports in the cylinder head was because, in the newer low port engine, they could avoid having so much of the intake valve guide protruding into the intake port.
Actually, it was for emissions reasons. The intake runners on the high port were often wet due to the placement of the runners and the injectors. They point more directly onto the runners, and thus wouldn't always get picked up by the intake air. The unatomized fuel results in poorer emissions.
I may not have explained that as well as I should have, but that's the essence.
IIRC, the reason they changed the position of the intake ports in the cylinder head was because, in the newer low port engine, they could avoid having so much of the intake valve guide protruding into the intake port.
Actually, it was for emissions reasons. The intake runners on the high port were often wet due to the placement of the runners and the injectors. They point more directly onto the runners, and thus wouldn't always get picked up by the intake air. The unatomized fuel results in poorer emissions.
I may not have explained that as well as I should have, but that's the essence.
T4 Primera
10-22-2001, 11:31 PM
Originally posted by P10DET
Actually, it was for emissions reasons. The intake runners on the high port were often wet due to the placement of the runners and the injectors. They point more directly onto the runners, and thus wouldn't always get picked up by the intake air. The unatomized fuel results in poorer emissions.
I may not have explained that as well as I should have, but that's the essence. No, you explained it well. Now I'm a learnin' somethin' too.:D
Actually, it was for emissions reasons. The intake runners on the high port were often wet due to the placement of the runners and the injectors. They point more directly onto the runners, and thus wouldn't always get picked up by the intake air. The unatomized fuel results in poorer emissions.
I may not have explained that as well as I should have, but that's the essence. No, you explained it well. Now I'm a learnin' somethin' too.:D
P10DET
10-22-2001, 11:46 PM
Originally posted by T4 Primera
No, you explained it well. Now I'm a learnin' somethin' too.:D
Well, Mike Kojima explained it better. He explained exactly what this did to emissions. I'm not too good at emissions (except after a few Shiner Bocks :right: ). Hell, race cars don't have emissions crap, so why should I learn about it, right? :p
No, you explained it well. Now I'm a learnin' somethin' too.:D
Well, Mike Kojima explained it better. He explained exactly what this did to emissions. I'm not too good at emissions (except after a few Shiner Bocks :right: ). Hell, race cars don't have emissions crap, so why should I learn about it, right? :p
RYANS
10-22-2001, 11:49 PM
So now that all you guys know the difference between the high port and low port do they make a cai for the high port that runs all the way to the manifold?
P10DET
10-22-2001, 11:53 PM
Originally posted by RYANS
So now that all you guys know the difference between the high port and low port do they make a cai for the high port that runs all the way to the manifold?
Yes. Hotshot does.
So now that all you guys know the difference between the high port and low port do they make a cai for the high port that runs all the way to the manifold?
Yes. Hotshot does.
RYANS
10-22-2001, 11:58 PM
George thank you for your input! I have ben asking this question for a while and this is the first respose.
Blue93G20
10-23-2001, 04:28 PM
YES, Hotshot does indeed make a CAI for the high port motor, i know cause i have one and i love it. Stays nice and icey cold mostly at night, But i do live in the desert. I picked mine up off of here in the for sale section brand new for like $100 so just keep you eyes open.:eek: :eek:
frogg
10-23-2001, 07:09 PM
Just curious, where do you live Blue?
Blue93G20
10-23-2001, 08:17 PM
I live in Tucson, AZ...where Summer is hot as hell:devil: and winter is how summer should be....:D
frogg
10-23-2001, 08:19 PM
Originally posted by Blue93G20
I live in Tucson, AZ...where Summer is hot as hell:devil: and winter is how summer should be....:D
Ya I know how ya feel :) :sun:
I live in Tucson, AZ...where Summer is hot as hell:devil: and winter is how summer should be....:D
Ya I know how ya feel :) :sun:
JustinP10
10-23-2001, 09:10 PM
Originally posted by Blue93G20
I live in Tucson, AZ...where Summer is hot as hell:devil: and winter is how summer should be....:D
DUDE! I REALLY know how you feel. I live in Tucson too! I used to live in Phoenix (moved down here in August) and it was definitly worse up there. Where are you at in Tucson? I live off of Grant and Silverbell.
I live in Tucson, AZ...where Summer is hot as hell:devil: and winter is how summer should be....:D
DUDE! I REALLY know how you feel. I live in Tucson too! I used to live in Phoenix (moved down here in August) and it was definitly worse up there. Where are you at in Tucson? I live off of Grant and Silverbell.
Blue93G20
10-23-2001, 09:37 PM
Sweet dude....I live off of Cortaro Farms and I-10 we should meet up sometime and bullshit. Sadly my car is dowm right now but you'd probably be interested to know my friend and i are dropping a DET in his 240sx. My mods include HS Header and CAI, as soon a i order it i will have a ACT clutch and a lower milage SR20DE (mine has rod knock). But yeah we should me up some time i think i have seen you on Speedway at some point or another. Kewl to know theres a fix up G20 in town...theres a blue one that is supposed to be getting a DET. Hopefully i will be getting a JDM SR20DE... :D :D
JustinP10
10-23-2001, 09:42 PM
Are you the one that used to have the White SE-R, but sold it to Shaun for the motor swap, or something like that? And now have a G20?
Blue93G20
10-23-2001, 09:54 PM
yeah that would be me.....Nissan Sentra SE-R RIP..or should i say pieces. Where did you buddy get the motor???for 500???....My motor is SHOT:badass:
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