porting question
Rotary Freak
Joined: Aug 2001
Posts: 2,267
Likes: 3
Originally Posted by gsl-se addict
Blake/GUITARJUNKIE : Do either of you guys have a good recommendation on a template for a 6 port (GSL-SE)? I am going to be opening it up to replace some seals and springs and would like to port it if I have the time/tools. I always figured there should be some good gains with porting a 6 port (maybe not as much of a gain as 4 ports, though). You always read about porting them not being worth it, difficult, etc., so that is what has discouraged me from doing it in the past.
Kent
Kent
Yep. Saw that right after I posted. It sounds really nice. I think having the templates pre-cut would be helpful. So do you use a large plate and use the dowel pins to locate the ports? One corner with secondary/aux, the other corner with primary?
All the 6 port guys interested in streetporting should go over to the Pineapple Racing vendor section and tell them you are interested.
All the 6 port guys interested in streetporting should go over to the Pineapple Racing vendor section and tell them you are interested.
Rotary Freak
Joined: Aug 2001
Posts: 2,267
Likes: 3
Originally Posted by gsl-se addict
Yep. Saw that right after I posted. It sounds really nice. I think having the templates pre-cut would be helpful. So do you use a large plate and use the dowel pins to locate the ports? One corner with secondary/aux, the other corner with primary?
multipersonality disorder
Joined: Feb 2002
Posts: 5,656
Likes: 0
From: so. cal
Originally Posted by Blake
Bridgeport intake *and* exhaust? Peripheral intake, side exhaust? Just guesses, but it's only a matter of time before someone does one or the other for the sake of being first. Seriously, whatever you do, keep us posted. We've worked on a couple of them, but because 99.99% are in warrantee, it will be a few years before the aftermarket gets a sufficient volume of them to do some serious experimentation...and even longer before conclusions are drawn from the results.
i have one good engine, enough parts to build another, and a bunch of junk housings and irons that i can practice my ideas on. i'm not giving any specific details, but it'll be a side port 3-rotor
Cholo with the Bolo
Joined: Nov 2005
Posts: 469
Likes: 0
From: Las Cruces, NM
Confused
Damn internet kept me from posting this.
Just to let you know, I AM heading down to kinkos this weekend to scan the results in (I don't have a scanner)
Needless to say, the results were a bit surprising. Not necessarily a good or bad surprising, but definately surprising.
My 82 GS is running 124.8 HP @ 6700 and only 101 ft/lbs of torque at 3500 RPM. The power curve is like a mountiain top and the torque curve looks slightly like a *****.
Jay's 83 GSL was the clear winner here.
It pulled 153 HP @ 6600 and 120 Ft/Lbs @ 4200. The power curve was jagged, but not rediculous like mine. The torque curve was actually very subtle and smooth, but dropped almost instantly after it peaked. The power stayed constant for another 400 RPM or so, and dropped drastically at 7000.
The 'almost stock' 81 black FB was the only car that performed how we expected it to.
112 @6400 and 110 @ 3700.
Can ANYONE tell me why I have absolutely zero torque? I have less torque than the almost stock car. Did someone **** up my port job or something?
In all truth, we were expecting power figures to be significantly higher, especially with the GSL. That's only about a 60 HP gain over stock. Dollar per HP, the low end car actually gets the best score!
I'm VERY confused by these results.
Just to let you know, I AM heading down to kinkos this weekend to scan the results in (I don't have a scanner)
Needless to say, the results were a bit surprising. Not necessarily a good or bad surprising, but definately surprising.
My 82 GS is running 124.8 HP @ 6700 and only 101 ft/lbs of torque at 3500 RPM. The power curve is like a mountiain top and the torque curve looks slightly like a *****.
Jay's 83 GSL was the clear winner here.
It pulled 153 HP @ 6600 and 120 Ft/Lbs @ 4200. The power curve was jagged, but not rediculous like mine. The torque curve was actually very subtle and smooth, but dropped almost instantly after it peaked. The power stayed constant for another 400 RPM or so, and dropped drastically at 7000.
The 'almost stock' 81 black FB was the only car that performed how we expected it to.
112 @6400 and 110 @ 3700.
Can ANYONE tell me why I have absolutely zero torque? I have less torque than the almost stock car. Did someone **** up my port job or something?
In all truth, we were expecting power figures to be significantly higher, especially with the GSL. That's only about a 60 HP gain over stock. Dollar per HP, the low end car actually gets the best score!
I'm VERY confused by these results.
Too old to act my age
Joined: Feb 2005
Posts: 3,164
Likes: 0
From: Tulsa, Ok.
gsterror: When you post the results, would you give a quick run down of each cars mods. This will help to diagnose the areas to start checking for the possible causes of these odd results.
It may just be the one car needs tuned better, but without knowing the list of mods, it's impossible to tell. I know you gave a breif description, but that was a couple pages back....
It may just be the one car needs tuned better, but without knowing the list of mods, it's impossible to tell. I know you gave a breif description, but that was a couple pages back....
Cholo with the Bolo
Joined: Nov 2005
Posts: 469
Likes: 0
From: Las Cruces, NM
Originally Posted by gsterror
So, percent, what do you figure the gain is on a ported 6 port?
I'm taking a few different first gens in to the dyno this weekend, so I'll have scans up of these (all 12A)
82 GS
full RB
Yaw
Carter FP
FPR
VERY mild streetport (so mild it might as well not be there)
DLIFDIS
83 GSL
aggressive SP
RB full SP exhaust
Yaw
Carter
FPR
Jay's black FB
Stockport
Presilencer-post exhaust
Yaw
Carter
FPR
I think it'll be a great comparison between all three (I'm gonna run my 82 first, and while the 83's running, I'll slap the headers on the black car, that way we can see the difference that porting gives)
I'm taking a few different first gens in to the dyno this weekend, so I'll have scans up of these (all 12A)
82 GS
full RB
Yaw
Carter FP
FPR
VERY mild streetport (so mild it might as well not be there)
DLIFDIS
83 GSL
aggressive SP
RB full SP exhaust
Yaw
Carter
FPR
Jay's black FB
Stockport
Presilencer-post exhaust
Yaw
Carter
FPR
I think it'll be a great comparison between all three (I'm gonna run my 82 first, and while the 83's running, I'll slap the headers on the black car, that way we can see the difference that porting gives)
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