Lifespan of peripheral ported engine
#4
Rotary Enthusiast
iTrader: (2)
Join Date: Sep 2001
Location: Altadena, CA
Posts: 932
Likes: 0
Received 0 Likes
on
0 Posts
oh yeah, right, forgot about that Although I'd imagine that if that failed you could just re-epoxy (?) it on a rebuild, vs. having to buy a new iron for a cracked bridge and doing all the porting again (?)
#5
Banned. I got OWNED!!!
Join Date: Sep 2002
Location: Saint Louis
Posts: 2,092
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Manolis_D
oh yeah, right, forgot about that Although I'd imagine that if that failed you could just re-epoxy (?) it on a rebuild, vs. having to buy a new iron for a cracked bridge and doing all the porting again (?)
oh yeah, right, forgot about that Although I'd imagine that if that failed you could just re-epoxy (?) it on a rebuild, vs. having to buy a new iron for a cracked bridge and doing all the porting again (?)
#6
Full Member
iTrader: (1)
Join Date: Mar 2001
Location: Gainesville, GA USA
Posts: 241
Likes: 0
Received 0 Likes
on
0 Posts
I have a friend that had 2 of them. He delivered pizzas in both of them. I think he had around 20-30k mi on the latest one when he sold it, and it still ran like a scalded dog. I think since the exhaust ports are already peripheral, there isn't any different load on the seals with a peripheral intake port. The 10.5k redline is a little hard on things sometimes, but if it's built properly they work great. I personally prefer big turbos, but nothing stirrs my blood like that BRAAAP BRAAAP BRAAP and the smell of Klotz first thing in the morning. Oh, and it got around 9mpg or so.
Trending Topics
#8
Old [Sch|F]ool
So don't rev it that high.
Hell CJ reported 20mpg highway with his p'port... that's good enough for me! I've had boingers making less power get worse mileage
Hell CJ reported 20mpg highway with his p'port... that's good enough for me! I've had boingers making less power get worse mileage
#10
Old [Sch|F]ool
What's the fun in that?
I dunno... I am starting to prefer engines that you don't wind the **** out of. Rotating inertia goes up with the square of RPM, meaning it gets progressively harder to accelerate rotating mass as it spins up faster. And steady state power may be nice but how the engine can accelerate determines how the car accelerates, and accelerating the car is what the engine is for. Unless you prefer racing dynos instead of cars.
I dunno... I am starting to prefer engines that you don't wind the **** out of. Rotating inertia goes up with the square of RPM, meaning it gets progressively harder to accelerate rotating mass as it spins up faster. And steady state power may be nice but how the engine can accelerate determines how the car accelerates, and accelerating the car is what the engine is for. Unless you prefer racing dynos instead of cars.
#11
Originally posted by peejay
What's the fun in that?
And steady state power may be nice but how the engine can accelerate determines how the car accelerates, and accelerating the car is what the engine is for. Unless you prefer racing dynos instead of cars.
What's the fun in that?
And steady state power may be nice but how the engine can accelerate determines how the car accelerates, and accelerating the car is what the engine is for. Unless you prefer racing dynos instead of cars.
I've been seeing a lot of those lately from certain individuals on the dyno!
crispeed
87 RX-7 TII
9.204@150.47mph
2600lbs
un-tubbed
#14
Learned alot | Alot to go
iTrader: (2)
Join Date: Apr 2002
Location: Rotaryland, New Hampshire
Posts: 4,232
Likes: 0
Received 0 Likes
on
0 Posts
alright, ive been following the 2 pport threads in here for a while and i have a question
it seems all pports make there power way up high and have very little low end due to the intake being very advanced. Do you have to put the port so high? couldnt it be put in lower, somewhat closer to where the stock ports. Would doing this negate the purpose of the pport?
it seems all pports make there power way up high and have very little low end due to the intake being very advanced. Do you have to put the port so high? couldnt it be put in lower, somewhat closer to where the stock ports. Would doing this negate the purpose of the pport?
#17
Full Member
Join Date: Feb 2003
Location: Canberra, AUSTRALIA
Posts: 76
Likes: 0
Received 0 Likes
on
0 Posts
Theory:
you would think that because the peripheral port is generating more power than the bridge port that there would be more stress on the parts and therefore have a shorter life span.....
you would think that because the peripheral port is generating more power than the bridge port that there would be more stress on the parts and therefore have a shorter life span.....
#19
Learned alot | Alot to go
iTrader: (2)
Join Date: Apr 2002
Location: Rotaryland, New Hampshire
Posts: 4,232
Likes: 0
Received 0 Likes
on
0 Posts
a bridgeported housing cracks because of what usualy?
increased amount of force because of the higher HP output?
More fragial to heat cycling on the "bridge"
or what?
would cryotreating the housings increase there life?
-Jacob
increased amount of force because of the higher HP output?
More fragial to heat cycling on the "bridge"
or what?
would cryotreating the housings increase there life?
-Jacob
#20
Adolf Hitler Verfechter
Join Date: Sep 2002
Location: Northern South Africa
Posts: 969
Likes: 0
Received 0 Likes
on
0 Posts
Peripheral engines can be quit drivable,depending on the location and size of the ports,if you look at Yaw`s peripheral,it wouldnt be as rough.Proper clearancing,carbon seals,and a balanced rotating assembly would help with the high rpms invloved.Example : Mazda Factory peripheral 12A housings were used,carbon seals,and 51IDA.It idels at 1200rpm,and starts making hp at 4000rpm.Balancing really does improve lifespan.I have seen 125000miles on a daily driven streetport 12A,very frequently taken to 8500+.
#23
NASTY NOISE IS MAKES?!?!?!!? it's the most enjoyable noise ever!
bUhr buHR bUhr BuHR bUhR **** i'm down for some peripheral port! ...maybe in two years
there is some street driven peripheral port in pR, so i don't think it's that stupid.
bUhr buHR bUhr BuHR bUhR **** i'm down for some peripheral port! ...maybe in two years
there is some street driven peripheral port in pR, so i don't think it's that stupid.
#24
I don't know how many of you remember Vigil Ward's R100 way back when in So Cal. Before it had the top chopped and a full tub job, he ran around all of LA county with a 13B P-Port for friggin' years. Big *** supertrapp on the back to quiet the ***** down....passed me a couple times at around 10,500!! Personally I'd love one....use 2 turboII 2 1/2" Presilencers and a 3 1/2" muffler at the end....that would bring some of the torque lower and make it livable noisewise. Uncork it at the track for the top end.
#25
Adolf Hitler Verfechter
Join Date: Sep 2002
Location: Northern South Africa
Posts: 969
Likes: 0
Received 0 Likes
on
0 Posts
"Not to mention the nasty noise it makes. I could never stand that."
Oh my word....cant believe i read that !!
I love Perripheral Ports....they just rock!The mpg is the only thing keeping me from driving one....
Seeing those pipes going into the Rotor housing..mmmmmm...brap-brap-brap-brap...
Oh my word....cant believe i read that !!
I love Perripheral Ports....they just rock!The mpg is the only thing keeping me from driving one....
Seeing those pipes going into the Rotor housing..mmmmmm...brap-brap-brap-brap...