Ls1 Rx7 Burnout Video
01-05-2004, 01:36 PM
#51
Member
Join Date: Jul 2001
Posts: 71
I am not anti V-8 at all. I just sold my Mustang GT and have owned plenty of V-8's. I even toyed with the idea of buying a Viper and playing w/ a V-10. I really dont have a problem with V-8 swaps, well actually, I do, I hate to see a rare car such as a FD get a V-8.
I understand. Imo, putting the v8 in the car makes it even more rare. There are a handful floating around and it's a very solid swap, not a hack job.
My whole involvement in this thread was to poke fun. www.thewrongmotor.com VS. www.therightmotor.com.
And I thought it was funny.
But, when I see V-8 conversion guys bragging about all their glorious HP and Torque and dependability it pisses me off.
You have a 5.7 litre engine it had better be making more power.
You have a 5.7 litre engine it had better be making more power.
Again, I completely understand. I was just repling to previous posts. I get really sick of hearing about how I completely threw off the balance of the car.
It takes dedication and knowledge to make big HP w/ a rotary. Your right slap a 150 shot of N2O on your 350 HP V-8 and wow you have and no brainer 500 HP. If thats what is important to you great. Dyno #'s and 1/4 mile times are not the world to me. When my puney 1.3 litre is making comperable #'s to your V-8 it makes me proud of my car knowing I did more w/ less.
It's a lot of work and I completely respect it. I've done it and had a lot of fun.
Here's a pic of my previous setup.
BTW- If I build a Cobra it will have a V-8 because thats what was meant to be in it. I was only kidding about the 20B.
... can we all be friends?
01-05-2004, 01:44 PM
#52
Member
Join Date: Jul 2001
Posts: 71
Originally Posted by mazdadrifter' date='Jan 5 2004, 02:25 PM
no wonder you couldn't keep a high power rotary!! 
Is there anyone on the board that hasn't blown a high power rotary yet? Not knocking them, but remember I used to fight against the v8 swaps. I finally opened my mind and found there's good and bad in every setup reguardless of pistons or rotors.
I like v8's for trucks. I honestly just don't like the power band of a v8. Lots of torque down low, but runs out of **** at high rpm (when a sports car should pull it's hardest)when you really need it. If i could build a low compression v8 twin turbo charged. That would excite me, but everything else is dull.
I've left room for a turbo and have been considering one since before I even started the conversion. It's a lot cheaper to just start out with bottle.
My car is going to be perfect for what I want. Smooth torque all the way to redline, medium power, but not so much that I can't touch the throttle w/o being pointed straight, and it's a very stable/solid setup. If a 4359387459 hp v8 outruns me I don't care, If i were builing a strip car this project would have been completely different.
My car isn't built for just drag racing either. I've spent more money making sure it has retained the weight distrobution etc. I could have saved around $1000 but using an 80lb heavier iron block LT1. A lot cheaper to make a stroker too
01-05-2004, 10:37 PM
#53
Senior Member
Join Date: Dec 2001
Location: Jensen Beach, FL / Sylva, NC
Posts: 2,934
Is there anyone on the board that hasn't blown a high power rotary yet? Not knocking them, but remember I used to fight against the v8 swaps. I finally opened my mind and found there's good and bad in every setup reguardless of pistons or rotors.
My engine was stock w/ 255 HP it will probably dyno in the 375RWHP range so lets say it has 425HP. Thats 326 HP per litre.
So you go make 580 HP with your LS1 that being the same ratio over stock as my REW. Thats 102 HP per litre.
Plus I would like to see you make 580 HP w/o NOS I would like to see it with either a S/C or Turbo. Then lets see how long the engine holds together.
Or really blow me away and make 326HP per litre.
Your 500HP LS1 is by no stretch of the imagination being pushed hard. So please with all due respect do not compare reliability of your LS1 to a Rotary. The people blowing them are pushing them 10x harder than the LS1 guys are.
I gues this swap is good if you want 500 HP and not have to put a real effort into it. I honestly am not impressed with a 500 HP 5.7 litre engine. But like you said its your car do what you like. I dont have to like it though.
01-06-2004, 09:59 AM
#54
Junior Member
Thread Starter
Join Date: May 2003
Posts: 21
Originally Posted by Jims5543' date='Jan 5 2004, 08:37 PM
So please with all due respect do not compare reliability of your LS1 to a Rotary. The people blowing them are pushing them 10x harder than the LS1 guys are.
I gues this swap is good if you want 500 HP and not have to put a real effort into it.
I gues this swap is good if you want 500 HP and not have to put a real effort into it.
Would you rather have a nice, cushy job, making $100,000 a year, or have to work 10x as hard for the same pay? There's only one smart answer.
01-06-2004, 12:08 PM
#56
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Join Date: Nov 2003
Location: Ireland
Posts: 907
Originally Posted by 1point3liter' date='Jan 5 2004, 07:35 PM
Basically what I'm getting at is. Who cares what engine you put in your car? I really don't understand why its ok to put a heavy three rotor in an rx7 and throw off the balance/create bump steer problems, but not ok to put an aluminum v8 and 6 speed t-56 but keep the 50/50 weight distrobution/handling and have instant torque. It totally baffles me.
Mark
01-06-2004, 12:29 PM
#57
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Join Date: Nov 2003
Location: Ireland
Posts: 907
From my perspective, the reason I wouldn't choose a v8 engine for an RX-7 is because it would have too much torque . I'm a firm believer in the fact that if you want to go faster don't add power but add lightness, and basically torque = weight.
Your new aluminium v8 engine may be lighter than a 20-something year old steel rotary, but I would imagine you must need a heavier duty gearbox and differential to take the much higher levels of torque, which I presume ends up with a heavier drivetrain overall. For me the beauty of a RX-7 is the way it derrives its power through an efficient high revving engine rather than from sheer displacement. Anyone can make a car more powerful, it doesn't necessarily mean it will be a faster car - just my 2 cents.
Mark
Your new aluminium v8 engine may be lighter than a 20-something year old steel rotary, but I would imagine you must need a heavier duty gearbox and differential to take the much higher levels of torque, which I presume ends up with a heavier drivetrain overall. For me the beauty of a RX-7 is the way it derrives its power through an efficient high revving engine rather than from sheer displacement. Anyone can make a car more powerful, it doesn't necessarily mean it will be a faster car - just my 2 cents.
Mark
01-06-2004, 01:06 PM
#58
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Join Date: Dec 2001
Location: Jensen Beach, FL / Sylva, NC
Posts: 2,934
inanimate_object - I disagree. A 5.7 litre 500+ HP V-8 will be faster. I understand why these guys are doing it. Its easy. I mean they can carry on about how hard it was to swap in the engine but once the swap is done its easy.
500 HP from my Rotary is an accomplishment. 500HP from a LS1 engine is an everyday occurance. Especially when your basically slapping on a 150 shot of N2O. It does not get simpler.
I am just at a loss as to why these guys drop this engine into a heavy FC or FD (2800 lbs) when they could be driving a LS1 powered 2000 lb Cobra or even a Super 7. If I was going through all that trouble I surely would not drop that engine in an FC. I would imagine these guys are as hated in the Corvette/Firebird/Camaro world as they are in the Rotary world. I mean sure there are the few that like it but for the most part its not well recieved.
500 HP from my Rotary is an accomplishment. 500HP from a LS1 engine is an everyday occurance. Especially when your basically slapping on a 150 shot of N2O. It does not get simpler.
I am just at a loss as to why these guys drop this engine into a heavy FC or FD (2800 lbs) when they could be driving a LS1 powered 2000 lb Cobra or even a Super 7. If I was going through all that trouble I surely would not drop that engine in an FC. I would imagine these guys are as hated in the Corvette/Firebird/Camaro world as they are in the Rotary world. I mean sure there are the few that like it but for the most part its not well recieved.
01-06-2004, 04:49 PM
#59
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Join Date: Aug 2003
Location: green brook, nj
Posts: 792
Originally Posted by inanimate_object' date='Jan 6 2004, 10:29 AM
From my perspective, the reason I wouldn't choose a v8 engine for an RX-7 is because it would have too much torque . I'm a firm believer in the fact that if you want to go faster don't add power but add lightness, and basically torque = weight.
Your new aluminium v8 engine may be lighter than a 20-something year old steel rotary, but I would imagine you must need a heavier duty gearbox and differential to take the much higher levels of torque, which I presume ends up with a heavier drivetrain overall. For me the beauty of a RX-7 is the way it derrives its power through an efficient high revving engine rather than from sheer displacement. Anyone can make a car more powerful, it doesn't necessarily mean it will be a faster car - just my 2 cents.
Mark
Your new aluminium v8 engine may be lighter than a 20-something year old steel rotary, but I would imagine you must need a heavier duty gearbox and differential to take the much higher levels of torque, which I presume ends up with a heavier drivetrain overall. For me the beauty of a RX-7 is the way it derrives its power through an efficient high revving engine rather than from sheer displacement. Anyone can make a car more powerful, it doesn't necessarily mean it will be a faster car - just my 2 cents.
Mark
If you use the setup from a LS1...including the t-56 6 speed tranny, most people actually lose weight. Just cause the tranny is stronger doesn't mean its heavier. Then they use the stock rear which I've heard is good into the 10s. So, like I said, it doesn't sound like you have any knowledge of this swap or the LS1 and t-56 tranny
"How does having a heavier engine give you bump steer?
Mark "
Also, I don't know what bump steers means, but i'm going to assume it hapens when you taking a turn, then you put more load onto the front suspension, specially the outside wheel, which would cause your suspension to hit the bump stop? Am I right?, if so, when you put in a heavy engine(20b) the extra weight wil allow the stock suspension to hit the bump stops easier. I would think this wouldn't make a difference anyway because if you put a 20b into your car, i would assume that the suspension isn't stock.
JIm....beautiful Rx7
