Sr20det powered Rx-7? -Possible?

Norcalidrifter · 02-15-2004, 05:44 PM

I recently picked up the modified magazine and It had a rx-7 with a sr20det engine in it. I heard people saying that rotor engines are hard to maintain, but I think we have a solution! I am just wondering if you guys think its easy to do or u need a real good technician to do this....

hachiroku-fc3s · 02-15-2004, 06:42 PM

Anything is possible with time, money, a welder, a ban saw, a sawzall, steel, aluminum, and the skills to yield the above. Not smart, but possible. Rotarys are fantastic engines. Hard to maintain?! Hardly, unless you dont know how to change the oil.

Norcalidrifter · 02-15-2004, 10:07 PM

Well I have a friend and he says he has problems with it every week. I heard a lot of people saying that. Hmm....Maybe your right....Its how u treat it i guess.

ACDSupra7 · 02-15-2004, 10:08 PM

C'mon man. That takes the R out of RX7.

nissanguy_24 · 02-15-2004, 10:16 PM

Sounds like an interesting Idea, but you will probably hurt the weight distribution and deffenately make it heavier.. plus the rotary guys will probably hang you for it...

JunpoweR · 02-15-2004, 11:51 PM

Anything is possible if you have Money or the resources to do it..
I think ank kind of Swap would be cool..I always wanted a V-8 ,RX-7=)

Realibility Is a issue for any car but i do believe a Rotary motor does take to over revving better and higher without blowing a valve..=) we dont have them =)

I say any car with MUCHO power will have reliability issues..
Thats why im gonna stick to around 200-300RWHP..
and thats alot for any engine under 2.0!!

Norcalidrifter · 02-16-2004, 10:52 AM

Actually...With the sr20det engine the weight will be less than before. The front becomes lighter than the rotor engine because you are going to cut off the metal and the extra stuff. I guess it will take off the R in rx7, but it'll be a cool project.

02-16-2004, 11:51 AM

nooooooooooooooooooooooooooo.

TP | sil-beer · 02-16-2004, 12:33 PM

Quote:

Originally posted by Norcalidrifter
Actually...With the sr20det engine the weight will be less than before. The front becomes lighter than the rotor engine because you are going to cut off the metal and the extra stuff. I guess it will take off the R in rx7, but it'll be a cool project.

wrong

baboon's a$$ · 02-16-2004, 07:05 PM

Quote:

Originally posted by Norcalidrifter
Actually...With the sr20det engine the weight will be less than before. The front becomes lighter than the rotor engine because you are going to cut off the metal and the extra stuff. I guess it will take off the R in rx7, but it'll be a cool project.

you're kidding right?

Norcalidrifter · 02-16-2004, 07:20 PM

IT FLIPPIN SAYS IN THE BOOK! Im reading it right now and thats what it says!!! I thought at first it'll be heavier, but then in the book it says its 65 pound lighter.....

02-16-2004, 11:34 PM

don't think the fackin magazines are bibles. They're screwey. The rotory motor is much lighter than a SR. Why do you think the RX7 has such good balance?

A SR swap is doable, have fun though.

nissanguy_24 · 02-16-2004, 11:41 PM

What book is this??

mranlet · 02-17-2004, 08:17 AM

He's saying that you can cut things out.

It's not like the rotary weighs nothing.

About this low-displacement claim -
Saying that a rotary makes X amount of power on 1.3 L isn't quite fair when comparing it to a piston engine. For a 2.0L 4-cyl, you are only using 1.0 L of that per revolution (since only 2 of the cylinders will fire in one revolution), while a 1.3L Rotar engine will combust 6 times per revolution (in a twin-rotar) using all 1.3L. This increased combustion is why the rotary gets such crappy gas mileage.

I love the rotary design and do think it's a mervelous engine. It is really too bad that rotaries haven't gotten the development that piston engines have (more than 100 years of R&D), because it really is a superior design. However, with engineering where it is today, it isn't hard to make a piston engine that weighs the same as a rotary, makes the same power and is more reliable.

-MR

Norcalidrifter · 02-17-2004, 10:10 AM

well it isnt a book, its a magazine called "Modified Magazine." Well Im convinced that the sr20 is heavier, but you have to think about all the metal that was cut off.

ZeroliftAutoLab · 02-17-2004, 05:37 PM

its for sale

http://cgi.ebay.com/ebaymotors/ws/eB...tem=2461183887

prodigy · 02-17-2004, 06:11 PM

Quote:

Originally posted by Norcalidrifter
I recently picked up the modified magazine and It had a rx-7 with a sr20det engine in it. I heard people saying that rotor engines are hard to maintain, but I think we have a solution! I am just wondering if you guys think its easy to do or u need a real good technician to do this....

I have seen one for sale. It can and has been done by a none pro shop or however you want to put that.

Norcalidrifter · 02-17-2004, 07:11 PM

Its for sale???!!! WOW that was quick. I guess he has more plans. Cool!

Chas · 02-17-2004, 07:46 PM

Crazy

hachiroku-fc3s · 02-17-2004, 07:52 PM

More like dumb. If I ever ran across that guy.....

I didnt know we were talking about an FD. I had seen red tops in FCs....Thats just dumb....

baboon's a$$ · 02-17-2004, 08:06 PM

the question of feasible? vs. why bother? comes to mind, If you build a rotary the RIGHT way then they can be as reliable or more reliable than a piston engine hp for hp, but the same can be said about just about any motor, if you treat it bad or do something half-a$$ then it's gonna blow up, plain and simple. Most people that build 7's never port the engine or add thicker apex seals or for godsakes replace the oil seals. They just throw a buncha mods at it and not even think about the internals ,or so I've read in almost every article that's written about a street driven RX7. then again I may just be talkin outta my a$$.

hachiroku-fc3s · 02-17-2004, 08:16 PM

No, good post, I am actually glad you posted this. You are exactly right. There arent many mods necessary in making a great rotary engine but you do have to use your brain. Almost any engine can be great, that is why I hate many swaps (especially like this), but you can't half a.. it....ever. Grooving the water jackets is smart too.

CaliChocolate · 02-20-2004, 05:05 AM

Anything is possible with money. However, everyone that has owned a 7 will tell you that the rotary engine is a key signiture to an RX-7. Kinda like the anology: Mario Brothers is to Nintendo. When you hear a rotary come around the block, you know its a 7. No other engine hums like a rotary. Its like a pride thing; it sets you apart from the crowd. No longer are you known by your first name, but you are now known as a rotor-head!! You're one of a kind amongst most enthusiats. Isnt that special???

mranlet · 02-20-2004, 09:20 AM

Rotary accually qualifies as a religion...

I saw a picture one time of a tattoo that had a cross-section of a rotary in the guy's chest, and a intercooler on his stomach, with one turbo at each shoulder...

If you want an RX-7 but don't want to destroy a rotary engine and know piston engines, a SR20 RX wouldn't be a bad thing once you get past the blashpening part.

-MR

Ghost of Duluth · 02-23-2004, 06:58 PM

Don't have specific weight figures on the SR BUT you can bolt in an LS1 and save 40lbs. So the Rotary isn't that light with the twins on it.

02-15-2004, 05:44 PM	#1
Norcalidrifter Registered Alcohol user Join Date: Feb 2004 Location: Richmond Posts: 130	Sr20det powered Rx-7? -Possible? I recently picked up the modified magazine and It had a rx-7 with a sr20det engine in it. I heard people saying that rotor engines are hard to maintain, but I think we have a solution! I am just wondering if you guys think its easy to do or u need a real good technician to do this....

02-15-2004, 11:51 PM	#6
JunpoweR Registered User Join Date: Jul 2003 Location: ~San~Francisco~415~510~ Posts: 434	ANything is Possible! How Deep Is Your Pocket??!! Anything is possible if you have Money or the resources to do it.. I think ank kind of Swap would be cool..I always wanted a V-8 ,RX-7=) Realibility Is a issue for any car but i do believe a Rotary motor does take to over revving better and higher without blowing a valve..=) we dont have them =) I say any car with MUCHO power will have reliability issues.. Thats why im gonna stick to around 200-300RWHP.. and thats alot for any engine under 2.0!! Last edited by JunpoweR; 02-15-2004 at 11:55 PM.

02-23-2004, 06:58 PM	#25
Ghost of Duluth Sixgun Join Date: Nov 2003 Location: Neverland Posts: 2,280	Don't have specific weight figures on the SR BUT you can bolt in an LS1 and save 40lbs. So the Rotary isn't that light with the twins on it. __________________ Team SIXGUN, Don't whine about the food chain, be the top of it. Tokyo Pimps, Godzilla is coming. Lorin, oh Lorin, where have you gone?? If you're in the stands warming the bench, don't whine about the guys in the drivers seats.

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02-15-2004, 06:42 PM	#2
hachiroku-fc3s Registered User Join Date: Dec 2003 Location: D/FW TX Posts: 549	Anything is possible with time, money, a welder, a ban saw, a sawzall, steel, aluminum, and the skills to yield the above. Not smart, but possible. Rotarys are fantastic engines. Hard to maintain?! Hardly, unless you dont know how to change the oil.

02-15-2004, 10:07 PM	#3
Norcalidrifter Registered Alcohol user Join Date: Feb 2004 Location: Richmond Posts: 130	Well I have a friend and he says he has problems with it every week. I heard a lot of people saying that. Hmm....Maybe your right....Its how u treat it i guess.

02-15-2004, 10:08 PM	#4
ACDSupra7 ACDSevenGuy Join Date: Nov 2003 Location: Los Angeles Posts: 1,148	C'mon man. That takes the R out of RX7.

02-15-2004, 10:16 PM	#5
nissanguy_24 Guest Join Date: Jan 2004 Location: bakersfield, CA Posts: 3,197	Sounds like an interesting Idea, but you will probably hurt the weight distribution and deffenately make it heavier.. plus the rotary guys will probably hang you for it...

02-16-2004, 10:52 AM	#7
Norcalidrifter Registered Alcohol user Join Date: Feb 2004 Location: Richmond Posts: 130	Actually...With the sr20det engine the weight will be less than before. The front becomes lighter than the rotor engine because you are going to cut off the metal and the extra stuff. I guess it will take off the R in rx7, but it'll be a cool project.

02-16-2004, 11:51 AM	#8
nrgdrft Guest Posts: n/a	nooooooooooooooooooooooooooo.

02-16-2004, 07:20 PM	#11
Norcalidrifter Registered Alcohol user Join Date: Feb 2004 Location: Richmond Posts: 130	IT FLIPPIN SAYS IN THE BOOK! Im reading it right now and thats what it says!!! I thought at first it'll be heavier, but then in the book it says its 65 pound lighter.....

02-16-2004, 11:34 PM	#12
Nightwalker Guest Posts: n/a	don't think the fackin magazines are bibles. They're screwey. The rotory motor is much lighter than a SR. Why do you think the RX7 has such good balance? A SR swap is doable, have fun though.

02-16-2004, 11:41 PM	#13
nissanguy_24 Guest Join Date: Jan 2004 Location: bakersfield, CA Posts: 3,197	What book is this??

02-17-2004, 08:17 AM	#14
mranlet Smokes Dynamite Join Date: Dec 2003 Location: Tampa, CT, all over the place! Posts: 1,090	He's saying that you can cut things out. It's not like the rotary weighs nothing. About this low-displacement claim - Saying that a rotary makes X amount of power on 1.3 L isn't quite fair when comparing it to a piston engine. For a 2.0L 4-cyl, you are only using 1.0 L of that per revolution (since only 2 of the cylinders will fire in one revolution), while a 1.3L Rotar engine will combust 6 times per revolution (in a twin-rotar) using all 1.3L. This increased combustion is why the rotary gets such crappy gas mileage. I love the rotary design and do think it's a mervelous engine. It is really too bad that rotaries haven't gotten the development that piston engines have (more than 100 years of R&D), because it really is a superior design. However, with engineering where it is today, it isn't hard to make a piston engine that weighs the same as a rotary, makes the same power and is more reliable. -MR

02-17-2004, 10:10 AM	#15
Norcalidrifter Registered Alcohol user Join Date: Feb 2004 Location: Richmond Posts: 130	well it isnt a book, its a magazine called "Modified Magazine." Well Im convinced that the sr20 is heavier, but you have to think about all the metal that was cut off.

02-17-2004, 05:37 PM	#16
ZeroliftAutoLab Registered User Join Date: Dec 2003 Location: Cincinnati, OH Posts: 53	its for sale http://cgi.ebay.com/ebaymotors/ws/eB...tem=2461183887

02-17-2004, 07:11 PM	#18
Norcalidrifter Registered Alcohol user Join Date: Feb 2004 Location: Richmond Posts: 130	Its for sale???!!! WOW that was quick. I guess he has more plans. Cool!

02-17-2004, 07:46 PM	#19
Chas Guest Join Date: Nov 2003 Location: Huntington Beach Posts: 2,566	Crazy

02-17-2004, 07:52 PM	#20
hachiroku-fc3s Registered User Join Date: Dec 2003 Location: D/FW TX Posts: 549	More like dumb. If I ever ran across that guy..... I didnt know we were talking about an FD. I had seen red tops in FCs....Thats just dumb....

02-17-2004, 08:06 PM	#21
baboon's a$$ Junior Member Join Date: Nov 2003 Location: somewhere in GA Posts: 193	the question of feasible? vs. why bother? comes to mind, If you build a rotary the RIGHT way then they can be as reliable or more reliable than a piston engine hp for hp, but the same can be said about just about any motor, if you treat it bad or do something half-a$$ then it's gonna blow up, plain and simple. Most people that build 7's never port the engine or add thicker apex seals or for godsakes replace the oil seals. They just throw a buncha mods at it and not even think about the internals ,or so I've read in almost every article that's written about a street driven RX7. then again I may just be talkin outta my a$$.

02-17-2004, 08:16 PM	#22
hachiroku-fc3s Registered User Join Date: Dec 2003 Location: D/FW TX Posts: 549	No, good post, I am actually glad you posted this. You are exactly right. There arent many mods necessary in making a great rotary engine but you do have to use your brain. Almost any engine can be great, that is why I hate many swaps (especially like this), but you can't half a.. it....ever. Grooving the water jackets is smart too.

02-20-2004, 05:05 AM	#23
CaliChocolate Newbie Join Date: Feb 2004 Location: Japan Posts: 24	Anything is possible with money. However, everyone that has owned a 7 will tell you that the rotary engine is a key signiture to an RX-7. Kinda like the anology: Mario Brothers is to Nintendo. When you hear a rotary come around the block, you know its a 7. No other engine hums like a rotary. Its like a pride thing; it sets you apart from the crowd. No longer are you known by your first name, but you are now known as a rotor-head!! You're one of a kind amongst most enthusiats. Isnt that special???

02-20-2004, 09:20 AM	#24
mranlet Smokes Dynamite Join Date: Dec 2003 Location: Tampa, CT, all over the place! Posts: 1,090	Rotary accually qualifies as a religion... I saw a picture one time of a tattoo that had a cross-section of a rotary in the guy's chest, and a intercooler on his stomach, with one turbo at each shoulder... If you want an RX-7 but don't want to destroy a rotary engine and know piston engines, a SR20 RX wouldn't be a bad thing once you get past the blashpening part. -MR