LS1 in a RX-7

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Old 06-05-2004 | 09:52 PM
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LS1 in a RX-7

http://honda-tech.com/zerothread?id=880931
Old 06-05-2004 | 10:48 PM
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Hmmm...kinda defeats the whole purpose of an RX-7....I mean, it's a rotary car...thats why people buy it.
Old 06-05-2004 | 10:53 PM
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Would that fit in a miata? I remember waaay back someone fit a 5.0 mustang engine in the miata...

Im a fan of rotaries
Old 06-06-2004 | 01:17 AM
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Long live the LS1..... those are probably the best made engines Chevy has ever produced....
Old 06-06-2004 | 02:34 AM
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people sell rx7 cause of the rotory motor. those damn things overheat and last about 70k miles.

the ls1 rx7 has a 50/50 weight distribution and weigh in at a total of 2831lbs running a 9.8@140mph.....while still getting 28mph hwy.

anyone have a problem with that?
Old 06-06-2004 | 02:59 AM
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hey i posted it cause i was impressed. i don't like new american cars, but the old ones will live forever
Old 06-06-2004 | 07:44 PM
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Originally Posted by RUF 993TTR
people sell rx7 cause of the rotory motor. those damn things overheat and last about 70k miles.

the ls1 rx7 has a 50/50 weight distribution and weigh in at a total of 2831lbs running a 9.8@140mph.....while still getting 28mph hwy.

anyone have a problem with that?

The LS1 Rx7 doesn't have 50/50 weight distribution unless they added some weight in the back. The v8 totally throws off the handling of the Rx7. You're taking out a 1.3/2.6 liter engine and throwing in a v8. What do you think is gonna happen?
Old 06-07-2004 | 12:55 PM
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2 rx7 guys around here have the ls1 bolted to thei cars and run almost everyone they encounter. The mototrs are built and one of them is spraying a 100 shot.
Old 06-07-2004 | 01:33 PM
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Originally Posted by al900rr
The LS1 Rx7 doesn't have 50/50 weight distribution unless they added some weight in the back. The v8 totally throws off the handling of the Rx7. You're taking out a 1.3/2.6 liter engine and throwing in a v8. What do you think is gonna happen?

The v8 is actually right around the same weight as the rotary, I actually think it may be lighter

It's a bitchin car, handles awesome, my buddy actually helped Hoffines ( I think that's the spelling but couldn't find anything on the net) produce the actual first car
Old 06-07-2004 | 01:37 PM
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the LS1 also brings a ton of benefit, A lot better gas mileage, a HUGE difference in power over the RPM range, let's not even get into reliability etc, etc.
Old 06-07-2004 | 01:41 PM
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The aluminum GM LS1 and LS6 engines are extremely light power plants. With the complete removal of the 13B and the sequential turbo assembly, the project car's final weight is less than the total gross vehicle weight of a stock Mazda RX7. The final weight of the car is listed below. The car weighed 2,831lbs with a full Touring interior, sunroof, complete Bose sound system including the "Sound Wave," and a 1/4 tank of gas.

LF: 746 RF: 677 Total Front: 1,423lbs
LR: 675 RR: 733 Total Rear: 1,408lbs


www.hinsonsupercars.com is the site



so in other words, what i'm saying to you AL900RR is :noob:
Old 06-07-2004 | 04:42 PM
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Originally Posted by Edr0e
Would that fit in a miata? I remember waaay back someone fit a 5.0 mustang engine in the miata...

Im a fan of rotaries
I remember that being called the "Monster Miata". With different options it could very well put out some 500hp if memory serves.
Old 06-07-2004 | 04:45 PM
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Yeah, i remember the news doing a section on those 5.0 miatas. This was back in the mid 90's, when hybrids were in
Old 06-07-2004 | 05:20 PM
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yea, those 5.0 miatas are a killer, the blown ones are even more fun
Old 06-07-2004 | 05:55 PM
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They are call Monster Mitas. Here is a link to one of them. Not very much info though.

click me

The name of the place that used to make them was called monster Motorsports in Escondido CA. but I don't think they are around any more.
Old 06-07-2004 | 06:30 PM
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there are numerous places that do them now
Old 06-07-2004 | 11:41 PM
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If you notice the 13b sits well behind the front axle making the car "mid-engine like". I'm almost positive the v8 will not sit in the exact same place as the factory motor. The 13b is the size of a milk crate. Weight will be put into the wrong places. IN terms of reliability I will speak from personal experience, I have a heavily modded 3rd gen Rx7 that I use as a daily driver. I have had no problems yet though my motor was rebuilt at around 88,000 miles.
Old 06-10-2004 | 05:07 AM
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Originally Posted by al900rr
The LS1 Rx7 doesn't have 50/50 weight distribution unless they added some weight in the back. The v8 totally throws off the handling of the Rx7. You're taking out a 1.3/2.6 liter engine and throwing in a v8. What do you think is gonna happen?

hey...since you're so sure of this...how about a lil wager? they didnt add any weight in the back. you obviously know nothing about the rotary motory's weight or the american motor's....
Old 06-10-2004 | 11:18 AM
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Originally Posted by RUF 993TTR
hey...since you're so sure of this...how about a lil wager? they didnt add any weight in the back. you obviously know nothing about the rotary motory's weight or the american motor's....


I think I already shut him up
Old 06-10-2004 | 11:20 AM
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and here is a pic of the motor in the car al

looks like it's mounted pretty far back like the 13B

Old 06-10-2004 | 02:18 PM
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Originally Posted by indoMFP
Long live the LS1..... those are probably the best made engines Chevy has ever produced....
Old 06-10-2004 | 03:34 PM
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Originally Posted by RUF 993TTR
hey...since you're so sure of this...how about a lil wager? they didnt add any weight in the back. you obviously know nothing about the rotary motory's weight or the american motor's....

Didn't shut me up. Don't visit this forum much. My whole point was motor placement is very important. In the 3rd gen that is pictured the motor sits pretty much behind the front axle. I'm almost positive that the LS1 will sit over the front axle. You being a Porshe enthusiast should be able to appreciate and comprehend what I'm trying to say. Also, you guys mean to tell me a Chevy V8 weights as much as a two-rotor. Show me some unbias proof and I'll be quiet. What I mean by proof is true engine weights and not numbers from the guy who did the swap. I've been a rotary head for about 6 years now, hell I own a rotary. I've pulled a rotary motor before and have hands on experience. I'll even take pics for ya.
Old 06-10-2004 | 03:36 PM
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Originally Posted by CLpower
and here is a pic of the motor in the car al

looks like it's mounted pretty far back like the 13B


In the pic you posted the motor is right over the front axle. The rotary sits behind it and lower. Last time I checked the LS1 weighed alittle over 450lbs and the rotary weighed in around 300. Here's a link for the rotary. You still wanna bet? Do some research before talking.
http://www.rotaryaviation.com/faq.html#weight
Old 06-10-2004 | 04:06 PM
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Originally Posted by CLpower
and here is a pic of the motor in the car al

looks like it's mounted pretty far back like the 13B



Look how much further back the rotary sits. The motor pretty much starts where the intake manifold is. Just use the strut tower bar as a reference. Holy cow, it's behind the front axle. OMG
Old 06-10-2004 | 07:09 PM
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Is that your RX7 in that pic? Looks sweet!!!

You are running one big turbo my friend !
Old 06-10-2004 | 08:54 PM
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Originally Posted by Edr0e
Is that your RX7 in that pic? Looks sweet!!!

You are running one big turbo my friend !
Actually it's not, lemme see if I can find one for you.
Old 06-10-2004 | 08:55 PM
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Old 06-10-2004 | 08:58 PM
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Old 06-10-2004 | 09:06 PM
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Originally Posted by CLpower
The aluminum GM LS1 and LS6 engines are extremely light power plants. With the complete removal of the 13B and the sequential turbo assembly, the project car's final weight is less than the total gross vehicle weight of a stock Mazda RX7. The final weight of the car is listed below. The car weighed 2,831lbs with a full Touring interior, sunroof, complete Bose sound system including the "Sound Wave," and a 1/4 tank of gas.

LF: 746 RF: 677 Total Front: 1,423lbs
LR: 675 RR: 733 Total Rear: 1,408lbs


www.hinsonsupercars.com is the site



so in other words, what i'm saying to you AL900RR is :noob:
That's weak kid. Obviously you have no clue what you are talking about. Show me some unbias numbers and I'll be quiet. Have you ever seen a V8 bareblock or a rotary bareblock? Lemme guess you're just posting sh*t off the net so you can sound like you know what you're talking about? Back to the point show me some unbias numbers and I'll shutup.
Old 06-10-2004 | 11:37 PM
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I m currently searching for a "weekend warrior" what would u say is a good price on a 3rd gen Rx7 w/ under 75k miles.

i have a friend who works at Autobacs in OC, he owns a jdm silvia s14 and was hollering working on the rx7 is a bitch! something about vacuum lines...

What do u think? Reliability is an issue for me, because i dont own a truck or a trailer.
Old 06-11-2004 | 09:41 AM
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Originally Posted by Edr0e
I m currently searching for a "weekend warrior" what would u say is a good price on a 3rd gen Rx7 w/ under 75k miles.

i have a friend who works at Autobacs in OC, he owns a jdm silvia s14 and was hollering working on the rx7 is a bitch! something about vacuum lines...

What do u think? Reliability is an issue for me, because i dont own a truck or a trailer.
A 3rd gen with that amount of miles usually go for around $10-13k. LOL There's about 150 vacuum lines under the intake manifold. Most owners swap them for more durable hoses cause they tend to harden up and crack due to the heat. I would set aside about $16k, buy a Rx7 with high mileage and rebuild the motor right away. 75k is right around the area where a rotary starts experiencing problems if it wasn't maintained right.
Old 06-11-2004 | 11:00 AM
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Originally Posted by al900rr
That's weak kid. Obviously you have no clue what you are talking about. Show me some unbias numbers and I'll be quiet. Have you ever seen a V8 bareblock or a rotary bareblock? Lemme guess you're just posting sh*t off the net so you can sound like you know what you're talking about? Back to the point show me some unbias numbers and I'll shutup.

I've seen both bareblocks. The V8 IS ALUMMINUM!!!!!!!!!!! then add in the weight fo the turbos, etc you see how weight adds up to the rotary. Size doesn't determine weight. They are almost identical in weight. I don't see why hinsons would be bias. Find me some weights on the stock RX7 to compare.

The weight of the motors are very similiar.
Old 06-11-2004 | 11:01 AM
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Originally Posted by Edr0e
I m currently searching for a "weekend warrior" what would u say is a good price on a 3rd gen Rx7 w/ under 75k miles.

i have a friend who works at Autobacs in OC, he owns a jdm silvia s14 and was hollering working on the rx7 is a bitch! something about vacuum lines...

What do u think? Reliability is an issue for me, because i dont own a truck or a trailer.


out here in LA you can find rx7's w/ blown motors for about 5-6K. My buddy just picked one up w/ a perfect body and interior for 6.5K. Rebuilds usually can cost you about 3-4K
Old 06-11-2004 | 11:04 AM
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[QUOTE=al900rr] Lemme guess you're just posting sh*t off the net so you can sound like you know what you're talking about?[QUOTE]


that's runny



btw, I posted up #'s and you told me I was wrong. Why don't you post up some #'s supporting your argument.
Old 06-11-2004 | 11:22 AM
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[QUOTE=CLpower][QUOTE=al900rr] Lemme guess you're just posting sh*t off the net so you can sound like you know what you're talking about?


that's runny



btw, I posted up #'s and you told me I was wrong. Why don't you post up some #'s supporting your argument.
http://www.rotaryaviation.com/faq.html#weight
Last time I checked LS1's weighed in around 450. Rotaries with EVERYTHING IN FRONT OF THE FIREWALL weigh in around 345. Not only is the weight a factor but also motor placement. If you see in the pictures that you supplied, the LS1 sits right over the front axle. The rotary sits behind the axle and not on it. Look at the pics. Use the strut bar as reference.
Old 06-11-2004 | 11:29 AM
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Originally Posted by CLpower
I've seen both bareblocks. The V8 IS ALUMMINUM!!!!!!!!!!! then add in the weight fo the turbos, etc you see how weight adds up to the rotary. Size doesn't determine weight. They are almost identical in weight. I don't see why hinsons would be bias. Find me some weights on the stock RX7 to compare.

The weight of the motors are very similiar.
Why wouldn't they bias? It's their product they are selling. Can I sell you some used motor oil I wouldn't be needing anymore? Not saying that they are aren't reputable but it doesn't take a genius to figure out that a 350 outweighs a rotary. Hell rotaries are even lighter then some V6's out there.
Old 06-11-2004 | 11:32 AM
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Dude, do you realize at all how light an all aluminum motor is? I know you have a 7 yourself so you know how much those 2 turbos add to the weight, etc.


It doesn't take a genious to realize that an alluminum motor is light as hell and most likely lighter then some 4 cyl's out there!


How many cyl's are in a motor do not judge how much it weights
Old 06-11-2004 | 11:34 AM
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Originally Posted by CLpower
Dude, do you realize at all how light an all aluminum motor is? I know you have a 7 yourself so you know how much those 2 turbos add to the weight, etc.


It doesn't take a genious to realize that an alluminum motor is light as hell and most likely lighter then some 4 cyl's out there!


How many cyl's are in a motor do not judge how much it weights
Here's some more numbers. I'm not judging the wieghts by the amount of cylinders. I'm not the stupid.

If this doesn't seal the deal then I don't know what will. Here ya go.Scroll down to the rotaries. You can look up the v8s too.
http://www.angelfire.com/ar/dw42/engfyi.htm
Old 06-11-2004 | 11:34 AM
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an LS1 short block w/ crank/rods/pistons is less then 350#'s. I'm trying to get weight of the whole motor.
Old 06-11-2004 | 11:38 AM
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Originally Posted by al900rr
Here's some more numbers. I'm not judging the wieghts by the amount of cylinders. I'm not the stupid.

If this doesn't seal the deal then I don't know what will. Here ya go.Scroll down to the rotaries. You can look up the v8s too.
http://www.angelfire.com/ar/dw42/engfyi.htm


that doesn't help either of us. All it states is that some GM motors use alluminum heads. The LS1 has a full alluminum block also. It also doesn't show the weights of a TT 13B


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