I'm currently building up the bottom end of my LSVTEC project. Theres a pretty significant price difference between a B16A1 and a B16A2 engine. Since I'm just using the head, is there a huge difference between the two?
If I go with the A1 ... will the stock cams and valvetrain suffice?

 

The only difference in the 2 motors not counting any of the electrical (OBD0/OBD1) or the type of injectors they use (saturate/peak and hold) are the pistons... The B16A1 uses the PR3 piston with a stock compression of 10.2:1 and the B16A2 uses the P30 piston with a stock compression of 10.4:1... The rest of the motor is exactly the same... I think there might have been a slight change in the intake cam but since you are building I dont think thats even a factor...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RS_H22 &raquo;</TD></TR><TR><TD CLASS="quote">The only difference in the 2 motors not counting any of the electrical (OBD0/OBD1) or the type of injectors they use (saturate/peak and hold) are the pistons... The B16A1 uses the PR3 piston with a stock compression of 10.2:1 and the B16A2 uses the P30 piston with a stock compression of 10.4:1... The rest of the motor is exactly the same... I think there might have been a slight change in the intake cam but since you are building I dont think thats even a factor...</TD></TR></TABLE> WORD!...
yes CAMS defenitly different between the two...no biggie
good luck with the build up!

 

Well technically there was never a B16A1. If you are talking about a 1st Gen B16A from an Integra XSi and CRX SiR and B16A2 is from a 99-00 Civic Si.

The 2nd Gen B16A is 10.4:1 compared to the B16A2 and 1st Gen B16A @ 10.2:1, but you aren't using the blocks so this dosen't really matter.

The valve train on the two heads are pretty much the same spring/retainer/valve wise.

However the 2nd Gen B16A's JDM & USDM use more aggressive cams then the 1st Gen B16A's. The only thing with less aggressive cams are the auto B16A's.

If you are going stock, then 2nd gen because of not only the cams, but it's newer, less ware on valvetrain.

If you are building the head, then who cares.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr Milano &raquo;</TD></TR><TR><TD CLASS="quote">Well technically there was never a B16A1.</TD></TR></TABLE>

Well I'm sorry there is. I had one in my CRX EE8. The B16A1 is used the in the euro CRX EE8 and the Civic EE9 only made fra 90-91.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRXEE8 &raquo;</TD></TR><TR><TD CLASS="quote">

Well I'm sorry there is. I had one in my CRX EE8. The B16A1 is used the in the euro CRX EE8 and the Civic EE9 only made fra 90-91.</TD></TR></TABLE>

Don't keep up much on euro.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr Milano &raquo;</TD></TR><TR><TD CLASS="quote">Well technically there was never a B16A1. If you are talking about a 1st Gen B16A from an Integra XSi and CRX SiR and B16A2 is from a 99-00 Civic Si.

The 2nd Gen B16A is 10.4:1 compared to the B16A2 and 1st Gen B16A @ 10.2:1, but you aren't using the blocks so this dosen't really matter.

The valve train on the two heads are pretty much the same spring/retainer/valve wise.

However the 2nd Gen B16A's JDM & USDM use more aggressive cams then the 1st Gen B16A's. The only thing with less aggressive cams are the auto B16A's.

If you are going stock, then 2nd gen because of not only the cams, but it's newer, less ware on valvetrain.

If you are building the head, then who cares.</TD></TR></TABLE>

All of the cams are the same except automatic.
USDM B16A2/3 have only 10.2:1 CR as they use PR3 Pistons
Non US b16a made after 1992 have 10.4

 

That means into first gen B16A head are posible to put in B18 cams?

 

Hmmm. I know I've seen a magazine that put 99-00 B16A2 cams in a Gen 1 B16A and pretty decent gains. I guess it's "possible" it could of been an auto motor, but I didnt' think it was. The motor was in a 90-93 DA.

 

b16a/b17a/b18c cams are all the same

magazines are dumb

 

Thanks for the replys
I think i'm gonna go with the A1 head then.

This is a bit off topic but can I use all the stock rad hoses from my LS with the VTEC head?

 

Do auto B16As have dual valve springs on the intake side? I heard they didn't.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Root79 &raquo;</TD></TR><TR><TD CLASS="quote">That means into first gen B16A head are posible to put in B18 cams?</TD></TR></TABLE>

I'm using that setup right now. Gained me 0.25s in the 1/4 mile. JDM GSR cams into a 1st-gen B16, and the cams cost $75 USD used

 

I was under the impression that the LMA's from the first gen B16's were inferior to the ones later used in the b16a2 ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sgT &raquo;</TD></TR><TR><TD CLASS="quote">magazines are dumb </TD></TR></TABLE>

Yes I know I know, but......I don't know I don't have any excuse I guess.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sgT &raquo;</TD></TR><TR><TD CLASS="quote">b16a/b17a/b18c cams are all the same

magazines are dumb </TD></TR></TABLE>

I hope that you were joking.

B18C is a JDM Type R motor, and we all know that those aren't the same as B16 cams. If you meant the B18C1, which is the GSR motor, than you are still wrong because they have a more aggressive cam profile than the B16 as well, but not as much as the Type R.

 

If by inferior you mean old, I think you're right

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lazy bum shaughn &raquo;</TD></TR><TR><TD CLASS="quote">

I hope that you were joking.

B18C is a JDM Type R motor, and we all know that those aren't the same as B16 cams. If you meant the B18C1, which is the GSR motor, than you are still wrong because they have a more aggressive cam profile than the B16 as well, but not as much as the Type R.</TD></TR></TABLE>

Why did I know someone was going ot take that the wrong way. The guy above Steve's post asked about putting B18 cams in a 1st gen B16A because he seemed to think you can't. Obviously Mr. Sakai knows the profiles are differnt he was just assuming everyone in the forum had enough common sense to realize that. Obviously not. He just ment they are the same as in interchangable.

 

They do not have dual intake springs. You are correct.

I currently have a first gen auto motor in my EG....weak cams indeed.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by emissionsux &raquo;</TD></TR><TR><TD CLASS="quote">Do auto B16As have dual valve springs on the intake side? I heard they didn't.</TD></TR></TABLE>

 

Here in Europe all Integras Type-R are only with B18C6 engines. And we do B16A2 cam swap from the B18C6 engine and they fit without problems.

I do not have any experience with B16A1 thats why it is interestin.

 

I know 2nd gen uses a refined casting method.

If you compare 2nd and 1st gen heads, they changed their manufacturing process for whatever reasons. The casting marks are totally different. Also dont forget the 1st gen are cast cam rails, 2nd gen are milled.