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post #16 of 306 (permalink) Old 11-11-09, 16:04 Thread Starter
 
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Could that Greddy 6 be a NSX? Look at the rear hatch/engine cover lines and the roof line... Kinda resembles NSX?

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post #17 of 306 (permalink) Old 11-11-09, 16:57
 
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Nah, it's a completely custom car.

Carnage - what I meant was, other than what is written in a thread on a forum, did you look into it after wards to confirm. That guy only believes IIRC. I'll look into it tonight.

Brian - The apex seals are the equivalent to a head gasket. When one goes, you lose compression and the motor is "blown". It's just that if you can't do it yourself, finding someone to rebuild an engine is complicated. When mine blows, I'll be rebuilding it myself. If it fails, then I'll send it out to a shop and get a bridge port done at the same time.

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post #18 of 306 (permalink) Old 11-11-09, 21:59
 
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So if i got one, and my apex seals went, i'd just trailor it up to you for a weekend of fun! Beers on me. lol

I may not be perfect, but I'm Canadian and thats close enough!!!!!!!!
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post #19 of 306 (permalink) Old 11-11-09, 22:19
 
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all good! haha But make it Pepsi. I don't drink.

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post #20 of 306 (permalink) Old 11-12-09, 12:38 Thread Starter
 
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Did you guys see that 87 RX7 on Passtime last night. Blew the motor or the tranny on the line! ahaha... He was bouncing it off the rev limiter and it jerked and jusy stopped dead.

Hey joey... could you post a video of your buddy's 20b?

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post #21 of 306 (permalink) Old 11-12-09, 16:18
 
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Quote:
Originally Posted by JoeyV View Post
all good! haha But make it Pepsi. I don't drink.
i'm all about the pepsi.. but i don't mind the grown up pops once and a while.

I may not be perfect, but I'm Canadian and thats close enough!!!!!!!!
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post #22 of 306 (permalink) Old 11-12-09, 16:22

 
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Quote:
Originally Posted by JoeyV View Post
Nah, it's a completely custom car.

Carnage - what I meant was, other than what is written in a thread on a forum, did you look into it after wards to confirm. That guy only believes IIRC. I'll look into it tonight.

Brian - The apex seals are the equivalent to a head gasket. When one goes, you lose compression and the motor is "blown". It's just that if you can't do it yourself, finding someone to rebuild an engine is complicated. When mine blows, I'll be rebuilding it myself. If it fails, then I'll send it out to a shop and get a bridge port done at the same time.
Actually, the Apex seals are more like piston rings and valve seals as coolant doesn't pass them. They maintain compression though, so your right there.

Engine rebuilding around Ontario is not hard. Scarborough Mazda and Dave Wood both have Master rotary mechanics on site and build quite a few racecar motors a year. Besides that, there are plenty more worth mention. Just thought I'd add that in.

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SOLD - 1994 Mazda MX6 LS, Infiniti G35 HID conversion, 2.5" Magnaflow cat-back, 3" CAI, 16x8" FD RX7 wheels, LEDA Custom True Coilovers, shaved body and full repaint, Genuine Mazdaspeed Kit, '03 Protege rear caliper conversion, and much, much more...
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post #23 of 306 (permalink) Old 11-12-09, 20:16
 
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Quote:
Originally Posted by mazdaboyracer View Post
Did you guys see that 87 RX7 on Passtime last night. Blew the motor or the tranny on the line! ahaha... He was bouncing it off the rev limiter and it jerked and jusy stopped dead.

Hey joey... could you post a video of your buddy's 20b?
Nah, didn't see that. Link???

As for Andrews 20B, I don't have a video of it running, and I don't think he's up for taking it out of storage just for that. I believe I have a pic of his engine though. Here it is:




^ That thing is as big as my face.


Quote:
Originally Posted by I4MX6 View Post
Actually, the Apex seals are more like piston rings and valve seals as coolant doesn't pass them. They maintain compression though, so your right there.
I guess you're right as well. It's kinda hard to really say because the engines are so different. It kinda acts as both You know, those 3 parts all together do the same job as the 40+ in a piston engine..

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Engine rebuilding around Ontario is not hard. Scarborough Mazda and Dave Wood both have Master rotary mechanics on site and build quite a few racecar motors a year. Besides that, there are plenty more worth mention. Just thought I'd add that in.
This is interesting. If I end up needing a shop rebuild, and I'm still in eastern Canada, I may just drive it out there.

How about this? Make a list of all the shops that rebuild engines other than Mazda dealerships? (Which I don't recommend unless they've been around since the early 90's and actually SOLD RX-7's, as well as a mechanic that was there then) Could be helpful info for those who are looking into getting one but are worried about how to go about a blown engine(most Rotary owners go through a rebuild).

Also, if anyone wants to attempt a rebuild, the parts can be purchased here: Atkins Rotary

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Last edited by JoeyV; 11-12-09 at 20:24.
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post #24 of 306 (permalink) Old 11-12-09, 21:59 Thread Starter
 
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Quote:
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^ That thing is as big as my face.
ROOL: I need a bib. Thats a damn truck turbo!
I think that is what God would drive if he needed a car

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post #25 of 306 (permalink) Old 11-13-09, 16:49
 
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long time rotorhead (got 1st rx7 in 1991) dont have one right now but some pics of the last few-
87 n/a gxl (86k org miles DD)




7stock

old 86 n/a




my 1st 7 with built 12a


drag racing FD in '03


dirt track 1st gen

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2006 forester xt/1994 toyota 4x4/1979 rx7 scca
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post #26 of 306 (permalink) Old 11-13-09, 19:15

 
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post #27 of 306 (permalink) Old 11-13-09, 19:39
 
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kiesel used to have a sick FD rx7

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post #28 of 306 (permalink) Old 11-13-09, 19:55

 
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Quote:
Originally Posted by SDRotary View Post
kiesel used to have a sick FD rx7


7PARTS.com - Specializing in aftermarket parts for the Mazda RX-7

He sold it to a fellow in south america who is racing it in a local series there.

The bugeye is the 2nd variant of that car. Originally it was a 400-450-ish HP 3 rotor 20B with an extremely trick slide valve throttle body. For the region he runs in it was simply too loud for the sound regs they have there(shrieked like a banshee!!). After multiple massive mufflers (3 of the same size as whats in the picture) it was found that the induction noise was almost as loud. Even shrouding the intake didnt help so he replaced the engine with the world most powerful muffler

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post #29 of 306 (permalink) Old 11-13-09, 21:15

 
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Quote:
Originally Posted by midrange View Post
I have always liked the look of the RX7 with the lights down, when the lights are up, i find it kinda fugly. But i'd still own one.

What worries me about rotary is APEX seals!
Dont let it worry you!
In the early Rx days up to the Rx5 the twin dissy motors all used 6mm carbon apex seals, which were notorious for problems...they switched to 3mm steel seals in the late 70s, and then to 2mm seals in the FC.

I have heard of people going on to rack up 300,000km in an NA FC.

Most engine builders usually replace 2mm seals with 3mm ones if big power is needed. 6mm seals had an upside, they would allow quite high rpms...there used to be a club car series for 2.0l and under, of which the 10A Rx3 qualified based on the then 2x displacement rule....those guys used to frequently take the 10A with 6mm carbon apex seals well over 10,000rpm
I dont know how many meetings they were going between rebuilds.

Rotary engines were always popular over here as you could fit one into anything....and people have converted just about every car....VW beetles, combi's minis, ford escorts (british RWD design from the 70s, not the mazda based one) datsun 1200s
here back in the late 80s early 90s you could pick up a used rotary from japan for less than 500$, the most popular engine for conversions back then was the 12A turbo from the 80s japanese cosmo (HB 929 equiv) I remember ther were companies that specialised in drive in-drive out conversions

84 626 sedan FE SOHC turbo - Sold, no time to finish
84 626 sedan RF diesel - Sold, no time to work on it.
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07 Mazda 6 MZR-CD 6sp manual - new DD

Last edited by chief tool; 11-13-09 at 21:20.
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post #30 of 306 (permalink) Old 11-13-09, 23:16
 
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Well, i guess its all about how you drive your car. My bro had a RX7 with a turbo 2 motor, and many upgrades and in no time his seals went.. But when i think about it, i know my bro would have been driving it hard.. But when i looked into them, i saw that apex seals have been issues in many cases.. so i figured it was a problem that is common.

I may not be perfect, but I'm Canadian and thats close enough!!!!!!!!
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