1.8L sohc to 1.8L dohc or gtx/gtr
Thread Starter
Protege Enthusiast
Joined: Oct 2001
Posts: 199
From: Missouri
1.8L sohc to 1.8L dohc or gtx/gtr
I was wondering about how much it will cost to swap my 1.8L sohc to a 1.8L dohc or should i save more and get a gtx or gtr??because i was really thinking about doin a swap and needed to know how much it would cost
Protege Newbie
Joined: Dec 2001
Posts: 48
I don't think you need to change the block, you can probably change only the head and the ecu (i'm 85% sure).
You can probably get a head for 100-150$ from a scrap yard but I would strongly suggest to have it rebuilt before you put it in your car.
But now how much can a head rebuilt cost?
You can probably get a head for 100-150$ from a scrap yard but I would strongly suggest to have it rebuilt before you put it in your car.
But now how much can a head rebuilt cost?
Protege Newbie
Joined: Dec 2001
Posts: 48
Since we didn't get the dohc protege in canada I know I can take the a head from an old escort gt but what about a head from a miata?
I know it has the same displacement but the miata has from 128hp to 140hp...but then maybe it has to do with the pistons...
I know it has the same displacement but the miata has from 128hp to 140hp...but then maybe it has to do with the pistons...
Registered User
Joined: Dec 2001
Posts: 411
From: Paris Ontario Canada
Originally posted by White1stGen
Since we didn't get the dohc protege in canada I know I can take the a head from an old escort gt but what about a head from a miata?
I know it has the same displacement but the miata has from 128hp to 140hp...but then maybe it has to do with the pistons...
Since we didn't get the dohc protege in canada I know I can take the a head from an old escort gt but what about a head from a miata?
I know it has the same displacement but the miata has from 128hp to 140hp...but then maybe it has to do with the pistons...
Protege Newbie
Joined: Jan 2002
Posts: 21
PseudoRealityX...so my SOHC in my LX protege would be strong enough to handle a turbo?!!! Cool!!! I'm guessing the DOHC has more potential HP with a turbo than the SOHC with a turbo right?
But that's pretty kewl stuff...I guess instead of the swap, I can save the money and work on a turbo system for the SOHC. How about the oil line to the turbo...will it have to be custom also then?
But that's pretty kewl stuff...I guess instead of the swap, I can save the money and work on a turbo system for the SOHC. How about the oil line to the turbo...will it have to be custom also then?
Show 'n Go
Joined: Nov 2001
Posts: 422
From: Montréal, CAN
Re: Huh?????
Originally posted by 90&00 Protege
Excuse me????
The 1990-91 & 1993 Protege GT had the DOHC 1.8L. Granted, there aren't many out there - 1,500 1990s, 1,500 1991s, & 500 1993s, but we certainly DID get the DOHC motor.
Totally different intake on the Protege versus the Miata. The Protege had variable length intake runners and makes it's max torque far lower down in the rev range than the (by comparison) peaky Miata motor.
FYI:
1994-1995 Miata - 1.8L DOHC - 128bhp
1996-1997 Miata - 1.8L DOHC - 133bhp
1999-2000 Miata - 1.8L DOHC - 140bhp
2001-2002 Miata - 1.8L DOHC - 142bhp
Go look at the Mazda 4-cylinder interchange guide at www.solomiata.com - it'll help with your search.
Excuse me????
The 1990-91 & 1993 Protege GT had the DOHC 1.8L. Granted, there aren't many out there - 1,500 1990s, 1,500 1991s, & 500 1993s, but we certainly DID get the DOHC motor.
Totally different intake on the Protege versus the Miata. The Protege had variable length intake runners and makes it's max torque far lower down in the rev range than the (by comparison) peaky Miata motor.
FYI:
1994-1995 Miata - 1.8L DOHC - 128bhp
1996-1997 Miata - 1.8L DOHC - 133bhp
1999-2000 Miata - 1.8L DOHC - 140bhp
2001-2002 Miata - 1.8L DOHC - 142bhp
Go look at the Mazda 4-cylinder interchange guide at www.solomiata.com - it'll help with your search.
About the SOHC turbo... I'm in if a project is gonna be started... Also, How much power are we prolly looking at with a stock BPT turbo or even with a T28 Mitsubushi turbo (common on ebay).
thanks.
Protege Enthusiast
Joined: Jan 2002
Posts: 64
From: Virginia Beach, VA
Hello,
I'm new here, but have a question about this thread. I just bought a 90 LX with the 1.8L DOHC (that burns enough oil to make the EPA cry) and don't quite understand what you're saying. Is mine a "true" DOHC? FYI, I also have a 92 Escort GT with the "EXACT" same motor ('cept for the Mazda/Ford on the valve cover). Did the LX's not have a DOHC?
Bill
I'm new here, but have a question about this thread. I just bought a 90 LX with the 1.8L DOHC (that burns enough oil to make the EPA cry) and don't quite understand what you're saying. Is mine a "true" DOHC? FYI, I also have a 92 Escort GT with the "EXACT" same motor ('cept for the Mazda/Ford on the valve cover). Did the LX's not have a DOHC?
Bill
Protege Owner
Joined: Dec 2001
Posts: 587
From: www.clubprotege.com
the DX protege has 16 valves - but just 1 cam (SOHC). your LX, as well as GT, have 16 valves, but 2 cams - 1 for exhaust, 1 for intake... a 'true' DOHC.
by the way, send an email to Racing Beat if you're interested in some headers or any other parts- you've now got 2 cars that could use em!(i'm not going to giv up on this!!!)
by the way, send an email to Racing Beat if you're interested in some headers or any other parts- you've now got 2 cars that could use em!(i'm not going to giv up on this!!!)
Protege Enthusiast
Joined: Jan 2002
Posts: 64
From: Virginia Beach, VA
Thanks,
I thought that I was correct, but you never know with Mazda. I bought my 92 Escort GT new and nobody believes me when I tell them that it has a Mazda engine in it (which is why it's still running strong with over 185,000 miles on it). I haven't desided yet what I want to do with the Protege yet (i.e. rebuild it, use as donor car for Escort, part it, etc). It runs strong, but smokes really bad until it's warm (driving around for 5-10 minutes) and has some damage to it (scrape down drivers side and other minor dents/dings and a little cancer (not bad)). I wouldn't mind using it for a daily driver except for the smoke. But since I only paid $300 for it, I don't want to soak money into it (would rather spend it on the Escort).
Bill
I thought that I was correct, but you never know with Mazda. I bought my 92 Escort GT new and nobody believes me when I tell them that it has a Mazda engine in it (which is why it's still running strong with over 185,000 miles on it). I haven't desided yet what I want to do with the Protege yet (i.e. rebuild it, use as donor car for Escort, part it, etc). It runs strong, but smokes really bad until it's warm (driving around for 5-10 minutes) and has some damage to it (scrape down drivers side and other minor dents/dings and a little cancer (not bad)). I wouldn't mind using it for a daily driver except for the smoke. But since I only paid $300 for it, I don't want to soak money into it (would rather spend it on the Escort).
Bill
Show 'n Go
Joined: Nov 2001
Posts: 422
From: Montréal, CAN
Originally posted by White1stGen
I have an SE and I can assure you it's only a sohc 16v.
I have an SE and I can assure you it's only a sohc 16v.
Also, about the turbo, I was thinking that a T3 would prolly be a little big for my engine to spool it up... It'd be crap for everyday driving, would'nt it? I was told that a T28 would be better suited for an engine with a low base HP rating...