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#1
06-03-2004, 12:38 AM
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SI Heads, Fact or Fiction
A friend of friend said that to make a 1.5L a 1.6L all I would need is to swap the heads..
I checked and all the head gaskets are the same size for the 1.5 and 1.6... Unless the 1.6 has a longer stroke to make it a 1.6 the piston sleeve should be bigger right?? I came from VW's and older chevys where we would use bigger pistons to get bigger displacement. FACT OR FICTION can you just swap the heads to get a bigger displacement with these motors? MAX... 
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#4
06-03-2004, 01:35 AM
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Re: SI Heads, Fact or Fiction
No the piston is bigger.
__________________
Mods: D16Z6 Turbo'd P28 ecu and Greddy emanage for fuel.  FWD tire smokerMy first Civic love Died from 92 year old Fart not watchin out.   
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#5
06-03-2004, 01:25 PM
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ya, the piston is bigger, plus the 1.6 head has a more aggressive cam, pluss you are also goin to need to do the mpfi swap to get the full potential out of your 1.6
__________________
KoRnSaQ
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#6
06-03-2004, 02:40 PM
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if u put an Si head on a D15B2 block would u have any gains at all? or would u only get gains if u had the MPFI on the Si head?
__________________
94 s-10 bagged, body dropped, 22's, suicide coupe doors, fully shaved, and soon a small block 350 2011 Silverado... Stock Daily driver 
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#7
06-03-2004, 03:29 PM
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Re: SI Heads, Fact or Fiction
yes you would have gains just from the head, but it would be mostly because of the cam, which you can use in the b2 head anyway
__________________
1991 CRX Si Looking for 88-91 Sedan or Hatch
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#8
06-03-2004, 09:57 PM
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Re: SI Heads, Fact or Fiction
Thanks for setting that straight guys..
 I understand now, even though the head gasket kit is the same for 1.5 and 1.6 it does not cover all the way up to the outer circle of the piston sleve..MAX
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#9
06-04-2004, 08:32 PM
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Re: Re: SI Heads, Fact or Fiction
Quote:
Ok please inform us on how the piston is bigger since both the D16 and D15 motors share the 75mm bore??
__________________
-1991 Civic Si (Sold) -1990 Accord EX(Sold) -2000 Civic Hatch -1998 Lexus SC300   Click here to see my Shoe!
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#11
06-05-2004, 12:21 AM
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Re: SI Heads, Fact or Fiction
true, wtf were you guys thinking? all D-series are 75mm bore.
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#12
06-05-2004, 11:42 AM
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Re: SI Heads, Fact or Fiction
Man, you asswipes are making me dumber by giving out bad info. Someone straighten this out please! Where is SiZ or Ami when we need them?!?
__________________
Saturn Stealership Technician #331 
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#13
06-07-2004, 11:49 AM
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Re: SI Heads, Fact or Fiction
O.K. now I'm lost (again),
You are saying the bore is 75 mm on all D-series motors so there must be a longer stroke to makeup for the size displacement.... Can't be the heads or there would be a drop in compression if they where bigger... Hrmm... DSSMAX <---- Lost again....
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#14
06-07-2004, 11:55 AM
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i give up on this, i thought the piston was bigger, but if they share the same bore, then they have to be the same size, so is there any difference in the pistons at all???
__________________
KoRnSaQ
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#15
06-07-2004, 06:23 PM
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Re: SI Heads, Fact or Fiction
Is the crank different from the d15 and d16a6?
__________________
Saturn Stealership Technician #331
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ya i would like to know as well
