Cam question.
10-31-2009, 08:39 AM
#1
Registered Member
Thread Starter
Join Date: Jun 2009
Location: Richmond VA
Posts: 288
Likes: 0
Received 0 Likes
on
0 Posts
Cam question.
Alright this may seem like a stupid question, but help me out here. I am swapping a b20z into my 93 sol. My machinist, who auto x corvairs, swears that I cannot swap an automatic engine into a manual car.
He says that the cams and the crank will be different. He also question if the clutch will fit. Obviously, he says that I could use the block. So is this true? 
I have spent hours researching, and I have never read anything about this. A b20 is a common swap so I though something like this would have been on one of the 100s of threads I have read.
He says that the cams and the crank will be different. He also question if the clutch will fit. Obviously, he says that I could use the block. So is this true? I have spent hours researching, and I have never read anything about this. A b20 is a common swap so I though something like this would have been on one of the 100s of threads I have read.
10-31-2009, 10:44 AM
#3
Racetracks
Join Date: Nov 2002
Location: How long is a piece of string?
Posts: 15,668
Likes: 0
Received 0 Likes
on
0 Posts
Re: Cam question.
The machinist isn't an idiot, he's just applying ideas about domestic engines from yesteryear to the Japanese engines of the modern era. Not the same thing.
The machinist is correct that there are often different cams in auto and manual engines. That's done because the load and RPM ranges are different depending on the type of transmission, so the cam profiles are different. I don't think Honda does that though, because that makes everything less modular from an assembly standpoint. There are other reasons too but they're not important. I think that's just a domestic engine thing from a long time ago.
No Japanese engine company is stupid enough to use different cranks when a single type of crank could be used for both. Domestic engines are a different story, which is probably why your mechanic is thinking things like that.
Anyway, as far as I know, Honda engines of both transmission types are usually identical.
The machinist is correct that there are often different cams in auto and manual engines. That's done because the load and RPM ranges are different depending on the type of transmission, so the cam profiles are different. I don't think Honda does that though, because that makes everything less modular from an assembly standpoint. There are other reasons too but they're not important. I think that's just a domestic engine thing from a long time ago.
No Japanese engine company is stupid enough to use different cranks when a single type of crank could be used for both. Domestic engines are a different story, which is probably why your mechanic is thinking things like that.
Anyway, as far as I know, Honda engines of both transmission types are usually identical.
10-31-2009, 05:15 PM
#6
Registered Member
Thread Starter
Join Date: Jun 2009
Location: Richmond VA
Posts: 288
Likes: 0
Received 0 Likes
on
0 Posts
Re: Cam question.
Alright, thanks guys!
He had me feeling like a total idiot. The funnies part was that after he told me that, I was like, "Oh really? none of the threads or books I've read said anything about that." He merely responded, "well that's b/c every one knows you can't put an automatic engine with a manual car."
He had me feeling like a total idiot. The funnies part was that after he told me that, I was like, "Oh really? none of the threads or books I've read said anything about that." He merely responded, "well that's b/c every one knows you can't put an automatic engine with a manual car."
10-31-2009, 05:23 PM
#7
Racetracks
Join Date: Nov 2002
Location: How long is a piece of string?
Posts: 15,668
Likes: 0
Received 0 Likes
on
0 Posts
Re: Cam question.
Alright, thanks guys! He had me feeling like a total idiot. The funnies part was that after he told me that, I was like, "Oh really? none of the threads or books I've read said anything about that." He merely responded, "well that's b/c every one knows you can't put an automatic engine with a manual car."
He had me feeling like a total idiot. The funnies part was that after he told me that, I was like, "Oh really? none of the threads or books I've read said anything about that." He merely responded, "well that's b/c every one knows you can't put an automatic engine with a manual car."
10-31-2009, 05:47 PM
#8
Registered Member
Thread Starter
Join Date: Jun 2009
Location: Richmond VA
Posts: 288
Likes: 0
Received 0 Likes
on
0 Posts
Re: Cam question.
Yeah, I am about to rebuild the b20 (it has really low compression, I THINK the piston rings are shot.) and going to pair it with a b18 trany (grs) and drop them both into my del sol.
10-31-2009, 06:09 PM
#10
Registered Member
Thread Starter
Join Date: Jun 2009
Location: Richmond VA
Posts: 288
Likes: 0
Received 0 Likes
on
0 Posts