Bridgeport or V-8??EWhich one should I go with??
06-07-02, 07:13 PM
#1
Full Member
Thread Starter
Join Date: Jan 2002
Location: Mississippi
Posts: 138
Likes: 0
Received 0 Likes
on
0 Posts
Bridgeport or V-8??EWhich one should I go with??
Having Trouble deciding..Bridgeport or V-8..I have a V-8 out of a 70 Corvette but It will be pretty expensive to put in..I want to rev past 8000 rpms..I want to make power..I am going to do the engine work myself..Except for the port Job...It doesn't look like the rotary is very complicated...I think I could take it apart and put it back together myself...Has anyone out there done this thereself...If So let me know and tell me how hard and how much this would cost...
06-07-02, 07:29 PM
#2
Has been.. hangin' around
Join Date: Mar 2001
Location: Milpitas, CA
Posts: 2,618
Likes: 0
Received 0 Likes
on
0 Posts
Sounds like you answered your own question, either way, you want the bridgeport. How hard? I'll leave that for others to answer.
Me, I'm going V8 eventually
PaulC
Me, I'm going V8 eventually
PaulC
06-07-02, 07:38 PM
#3
We come with the Hardcore
iTrader: (2)
Join Date: Nov 2001
Location: Springfield, MO
Posts: 2,456
Likes: 0
Received 0 Likes
on
0 Posts
V8 would be more practical. Bridge wouldn't be as streetable, and the V8 could be built to have the same HP as the bridgeport pretty easily; and at lower RPM's.
If it were me, I'd go V8. www.grannysspeedshop.com for more info.
If it were me, I'd go V8. www.grannysspeedshop.com for more info.
06-07-02, 08:20 PM
#5
inteligent extratarestril
Join Date: Mar 2001
Location: The Sunny B.O.P, New Zealand
Posts: 1,313
Likes: 0
Received 0 Likes
on
0 Posts
you want to rev to over 8000, hmm its bridge port time for you then, unless you have huge $$$ invested in the 8 to be able to pull those rpm
06-07-02, 08:31 PM
#7
Junior Member
Join Date: May 2002
Location: Poulsbo, WA
Posts: 38
Likes: 0
Received 0 Likes
on
0 Posts
Bridgeport definitely. I have a friend that did a peripheral port motor for just under $1,300. The bridgeport runs good if done properly and makes plenty of power. A bulky V-8 will go to about 5500 rpm and make only low end power. The lighter more efficient rotary will have a better power to weight ratio and be more fun to drive because you will be able to go to 8000 rpm.
Trending Topics
06-07-02, 08:52 PM
#8
We come with the Hardcore
iTrader: (2)
Join Date: Nov 2001
Location: Springfield, MO
Posts: 2,456
Likes: 0
Received 0 Likes
on
0 Posts
Power to Weight Ratio? You realize that a V8 can be made so there is less than 100lbs. difference, right? Power-wise, the V8 can be made to handle far more than the bridgeport. The only things the Bridge has going for it ( other than being a rotary ) are it'll use the stock mounts, etc; and it'll rev higher.
06-08-02, 03:27 AM
#9
Uh ohhhhhh...... not one of these posts again?!?!
Ask yourself this....
Does having an engine that revs to 8000 safely make a car more fun.....?
Or does an engine that can make triple the torque make a car more fun?
Horsepower is a measurement of torque over a period of time. So the bridgeported 13B has the ability to make power high in the revs..... but what about the lopey idle, poor gas mileage, and the tradeoff with the more you port a 13B.... the less time it lasts. Also the fact that the torque will still not be impressive.
Torque is what pins you to your seat during acceleration. Not horsepower.
Put some new technology aluminum heads on the Vette engine, a nice cam, with good intake manifold and exhaust system and you will have a car that will blow your mind. 450-500ft/lbs of torqu will send quivers down your spine for a long time after building your new monster.
With proper suspension upgrades the car can still handle great.
Better yet..... sell the Vette engine and put in an LT1/T56 (6speed) from a '93-97 Camaro. About $2.5K-3K total! Obviously more cost is involved....
but you gotta pay to play.
Not trying to offend anyone.... just saying torque will always rule the boulevard and racetrack.
Zaxfire- Check out some of the creations on http://www.v8rx7.com check out the forum section. Everything from 5.0's to LT1's to LS1's (all aluminum V8) to V6's to Turbo V6's.
Investigate both options and determine which one you think is best.
GNX7
Ask yourself this....
Does having an engine that revs to 8000 safely make a car more fun.....?
Or does an engine that can make triple the torque make a car more fun?
Horsepower is a measurement of torque over a period of time. So the bridgeported 13B has the ability to make power high in the revs..... but what about the lopey idle, poor gas mileage, and the tradeoff with the more you port a 13B.... the less time it lasts. Also the fact that the torque will still not be impressive.
Torque is what pins you to your seat during acceleration. Not horsepower.
Put some new technology aluminum heads on the Vette engine, a nice cam, with good intake manifold and exhaust system and you will have a car that will blow your mind. 450-500ft/lbs of torqu will send quivers down your spine for a long time after building your new monster.
With proper suspension upgrades the car can still handle great.
Better yet..... sell the Vette engine and put in an LT1/T56 (6speed) from a '93-97 Camaro. About $2.5K-3K total! Obviously more cost is involved....
but you gotta pay to play.
Not trying to offend anyone.... just saying torque will always rule the boulevard and racetrack.
Zaxfire- Check out some of the creations on http://www.v8rx7.com check out the forum section. Everything from 5.0's to LT1's to LS1's (all aluminum V8) to V6's to Turbo V6's.
Investigate both options and determine which one you think is best.
GNX7
Last edited by gnx7; 06-08-02 at 03:33 AM.
06-08-02, 04:43 AM
#11
inteligent extratarestril
Join Date: Mar 2001
Location: The Sunny B.O.P, New Zealand
Posts: 1,313
Likes: 0
Received 0 Likes
on
0 Posts
I agree with the last guy.
also what you have to remember is HP and torque are directly related to how much air and fuel is going in. because the v8 doesn't have a great rev range like the rotary does, you are constantly producing power, this might be all find and dandy but i'd say that it'd be just as hungry around town as the bridgeport would be unless you have some way of getting the thing to drive around town pulling 750rpm instead of 1800-2500rpm
also what you have to remember is HP and torque are directly related to how much air and fuel is going in. because the v8 doesn't have a great rev range like the rotary does, you are constantly producing power, this might be all find and dandy but i'd say that it'd be just as hungry around town as the bridgeport would be unless you have some way of getting the thing to drive around town pulling 750rpm instead of 1800-2500rpm
06-08-02, 04:53 AM
#12
Lives on the Forum
Boy, gnx7 catches so much heat in here...
Not many FC's can beat his car right now, yet you guys give him a lot of flak for his ride.  Sodomy and murder?  Boy, you got one twisted sense of reality...
-Ted
Not many FC's can beat his car right now, yet you guys give him a lot of flak for his ride.  Sodomy and murder?  Boy, you got one twisted sense of reality...
-Ted
06-08-02, 08:45 AM
#13
Senior Member
Join Date: Jul 2001
Location: Las Vegas
Posts: 456
Likes: 0
Received 0 Likes
on
0 Posts
Now it's all clear to me. It is not V8's the purists object to, it's just the pistons inside.
I really like my rotaries, when they are running right, but lets be honest. The Wankel as used in the RX-7 is much more expesive to maintain, and requires a lot more "tuning" to keep running right.
Just read back through the posts to verify that.
I have noticed that my Wankel powered car gets driven a lot less - almost like a "classic car" I am preserving.
My V8 'Vert is a daily driver, fun, VERY FAST, and cheap to operate.
I really like my rotaries, when they are running right, but lets be honest. The Wankel as used in the RX-7 is much more expesive to maintain, and requires a lot more "tuning" to keep running right.
Just read back through the posts to verify that.
I have noticed that my Wankel powered car gets driven a lot less - almost like a "classic car" I am preserving.
My V8 'Vert is a daily driver, fun, VERY FAST, and cheap to operate.
06-08-02, 09:25 AM
#14
RX-7 stands for ROTARY something or other..
heheh
I'd go bridgeport or peripheralport (I hear PP engines last a LONG time)
What about a turbo?
V8 swap sounds like fun, (Mmmmmm, TORQUE) but will the rest of the drivetrain stand up to it? Might be VERY expensive in the end, swapping to a turbo tranny and diff.
V8 swaps sound like a very expensive way to turn a perfectly good car into a mustang.
as far as someone said you'll just have low end power, that depends entirely on how it's cammed. Toss in a lumpy cam and it won't start making power till 4500RPM and will keep making it till 7500+
it's not THAT hard to make a v8 rev to 7500, a stock 305/350 chevy will rev to 7000 (depending on the cam, and the year)
go to your local paved circle track, and ask the street stock guys how many RPM they are running at the end of the back straight.. with the STOCK motor, it's generally 7000-7500, they leave the cars in 1st.
heheh
I'd go bridgeport or peripheralport (I hear PP engines last a LONG time)
What about a turbo?
V8 swap sounds like fun, (Mmmmmm, TORQUE) but will the rest of the drivetrain stand up to it? Might be VERY expensive in the end, swapping to a turbo tranny and diff.
V8 swaps sound like a very expensive way to turn a perfectly good car into a mustang.
as far as someone said you'll just have low end power, that depends entirely on how it's cammed. Toss in a lumpy cam and it won't start making power till 4500RPM and will keep making it till 7500+
it's not THAT hard to make a v8 rev to 7500, a stock 305/350 chevy will rev to 7000 (depending on the cam, and the year)
go to your local paved circle track, and ask the street stock guys how many RPM they are running at the end of the back straight.. with the STOCK motor, it's generally 7000-7500, they leave the cars in 1st.
06-08-02, 10:18 AM
#15
Has been.. hangin' around
Join Date: Mar 2001
Location: Milpitas, CA
Posts: 2,618
Likes: 0
Received 0 Likes
on
0 Posts
Oh here we go again. I was worried it would start into this crap again.
HWO, try re-writing that post, it made zero sense. I have no idea what you just said.
I recommended earlier that the poster should go BP, only because he wants RPMs. However, RPMs mean nothing if you've got a 500 RPM powerband and no torque anywhere else.
rexman... I don't even know what to say except... GET A LIFE!
PaulC
HWO, try re-writing that post, it made zero sense. I have no idea what you just said.
I recommended earlier that the poster should go BP, only because he wants RPMs. However, RPMs mean nothing if you've got a 500 RPM powerband and no torque anywhere else.
rexman... I don't even know what to say except... GET A LIFE!
PaulC
06-08-02, 11:41 AM
#17
Lives on the Forum
Originally posted by Turbo23
one of the number one reason espically for me to get a 7 is cause of the rotary engine. Thats a big plus! Y not just go with a 20B
one of the number one reason espically for me to get a 7 is cause of the rotary engine. Thats a big plus! Y not just go with a 20B
10. I crashed my Grand National, and I couldn't find another one!
9. My sister gave me the FC for free!
8. I've got no good rotary mechanics where I live!
7. Dutweiller[sp?] is my best friend!
6. I can rebuild Buick engines in my sleep!
5. I fab race chassis for a living, and I have a $5,000 TIG welder in my living room!
4. The 20B engine itself costs the same as a Buick turbo engine!
3. The 20B swap is easliy over $10K, yet my Buick turbo engine swap was HALF that!
2. Hey, at least it's a turbo!
And the #1 answer is...
1. Hey, they supercharge NA FC's, I just wanted to try a Buick powered FC!
-Ted
06-08-02, 04:47 PM
#21
inteligent extratarestril
Join Date: Mar 2001
Location: The Sunny B.O.P, New Zealand
Posts: 1,313
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Silkworm
Oh here we go again. I was worried it would start into this crap again.
HWO, try re-writing that post, it made zero sense. I have no idea what you just said.
PaulC
Oh here we go again. I was worried it would start into this crap again.
HWO, try re-writing that post, it made zero sense. I have no idea what you just said.
PaulC
A V8 is making say 150+/- HP at 2000rpm right.
HP and Torque is the DIRECT RESULT of how much FUEL you have going into the motor (when combined with air) Because its making 150HP +/- at the rpm you are at when cruising around town, it will be sucking back as much gas as the bridge port would be when its making say 130HP, which would be hmm 3500-4000rpm. so when you think about it, when driving around the street, BOTH will be using VERY SIMILAR amounts of gas.
The bridge port is gas hungry issue is pretty much null and void in the arguement.
06-08-02, 05:59 PM
#23
Yikes..... these threads always get sticky....
ReTed- Thanks for the cool down words after the post after mine..... you are always supportive of alternative thinkers. BTW- after selling my 13B my car cost me $100. Then I sold the GXL diff and installed a T2 diff/axles. Now I'm $100 in the hole. That's when the phone calls started to find a GN drivetrain. 245hp/350ft/lbs tq stock? How could I go wrong?
Rexman- think outside your little rotary world. There is a lot to be learned. Get a ride in a 500 ft/lb torque RX-7 and see the light. 20+ mpg on the highway, great acceleration, good handling, and a driveable RX-7 for many a moon to come. No overheating issues, bad tank of gas woes, or lack of torque blues.
Felix Wankel- PUt a T2 diff out back and driveline swap and you will run 11's all day, handle well, and not break a thing. Because your V8/Turbo V6 driveline is near stock! Plus like you said with a newer EFI engine and overdrive trans you get power and economy.
HWO- Most V8's will make around 200hp @2000rpm... but at least 250ft/lbs tq. At 3000rpm that is about TQ peak and that should show about 350ft/lbs tq. Any basic V8 with minimal mods will make 350ft/lbs tq. If you want a V8 that revs.... you have to make some changes.... but that is half the fun as with building a 13B totally insane. But when you build up both.... the V8 yields mind boggling results.
I'll blast my 6am bugle roll call on this thread right now...... and maybe post another time to put out the flames.... but a V8 and definately not a V6 turbo (lighter weight) will not bastardize the handling of an FC or FD. You will get better gas mileage (if you go EFI), triple the torque, and if you go coilover and order custom springs retaint the stock handling.
Stepping off of my podium.....
GNX7
torque to spare......
ReTed- Thanks for the cool down words after the post after mine..... you are always supportive of alternative thinkers. BTW- after selling my 13B my car cost me $100. Then I sold the GXL diff and installed a T2 diff/axles. Now I'm $100 in the hole. That's when the phone calls started to find a GN drivetrain. 245hp/350ft/lbs tq stock? How could I go wrong?
Rexman- think outside your little rotary world. There is a lot to be learned. Get a ride in a 500 ft/lb torque RX-7 and see the light. 20+ mpg on the highway, great acceleration, good handling, and a driveable RX-7 for many a moon to come. No overheating issues, bad tank of gas woes, or lack of torque blues.
Felix Wankel- PUt a T2 diff out back and driveline swap and you will run 11's all day, handle well, and not break a thing. Because your V8/Turbo V6 driveline is near stock! Plus like you said with a newer EFI engine and overdrive trans you get power and economy.
HWO- Most V8's will make around 200hp @2000rpm... but at least 250ft/lbs tq. At 3000rpm that is about TQ peak and that should show about 350ft/lbs tq. Any basic V8 with minimal mods will make 350ft/lbs tq. If you want a V8 that revs.... you have to make some changes.... but that is half the fun as with building a 13B totally insane. But when you build up both.... the V8 yields mind boggling results.
I'll blast my 6am bugle roll call on this thread right now...... and maybe post another time to put out the flames.... but a V8 and definately not a V6 turbo (lighter weight) will not bastardize the handling of an FC or FD. You will get better gas mileage (if you go EFI), triple the torque, and if you go coilover and order custom springs retaint the stock handling.
Stepping off of my podium.....
GNX7
torque to spare......
06-09-02, 01:57 AM
#24
If an RX7 was meant to have a V8, it would have came with one from the factory. I've seen many videos of rx7s with 5.0 liter mustang engines and 350s also, and I still see a well tuned turbo rotary kick its ***. As far as me getting a life, well I have one, and it involves Rx7s with ROTARY ENGINES! So there, I stay true to the rotary roots and don't sell out for some ****** domestic V8 because you don't have to tune it much to extract power. It takes real skill and intelligence to tune and build rotaries, unlike a V8 that any redneck can slap together.
06-09-02, 02:18 AM
#25
Old [Sch|F]ool
I can think of MANY cars "not designed for V8's"... hell most Mustangs were "not designed for V8s" ('67-71 were but '64-66 weren't, nor were Mustang IIs and V8s were being phased out when the Fox chassis was designed, they wanted us to want a turbo 4-cylinder instead of a V8) Cobras were "not designed for V8s" - they were just another British sports car until some Texan decided to put a Ford 260 in one.
Just take it philosphically... RX-7 has an excellent chassis that is receptive to all manner of powerplants.
I also see you've never built up a piston engine before...
Everything is simple when you haven't tried it yet, eh?
Just take it philosphically... RX-7 has an excellent chassis that is receptive to all manner of powerplants.
I also see you've never built up a piston engine before...
Everything is simple when you haven't tried it yet, eh?