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swapping heads?

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luvmysammy

swapping heads?
« on: October 21, 2007, 10:28:11 PM »
my question is- will the head off of a 1.6L 8v tbi fit directly on the 1.3L sammy? or is it even possible... thanks for the help
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Offline Rhinoman

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Re: swapping heads?
« Reply #1 on: October 22, 2007, 04:42:14 AM »
It fits. Not sure what effect it would have on the compression ratio though. Also the TBI has no mechanical fuel pump set up.
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2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org
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sled0890

Re: swapping heads?
« Reply #2 on: October 22, 2007, 05:08:43 PM »
wouldnt that drop the compression ratio?
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Offline sidekicksrock

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Re: swapping heads?
« Reply #3 on: October 22, 2007, 05:37:24 PM »
I don't know for sure what the volume of the 1.6 head vs the 1.3 head, But I do know that the bores between the two are within a few thousandths of each other.  The 1.6 just has a longer stroke.
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luvmysammy

Re: swapping heads?
« Reply #4 on: October 22, 2007, 06:35:26 PM »
so probably not a good idea then, ok, thanks for the input
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Offline Rhinoman

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Re: swapping heads?
« Reply #5 on: October 23, 2007, 04:57:12 AM »
Quote from: sled0890 on October 22, 2007, 05:08:43 PM
wouldnt that drop the compression ratio?

Difficult to say without measuring it. Looking at a piston catalogue the 1298 looks to have flat top pistons whereas the 1.6 has dished pistons. 1.6 is 1mm/40thou larger bore.
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2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org
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Offline JoeCool

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Re: swapping heads?
« Reply #6 on: October 29, 2007, 11:16:20 PM »
There's an article about measuring cylinder head volume in a motor buiding mag this month. Basically they use plexy glass bolted to the underside of the head (valves installed). drill a small hole in the plexy glass and use a metered cyrenge to fill fluid into the head and record. Then measure bore to find the volume of your cylinder BDC & TDC. 325cc ish define the "ish" and you have theoretical compression. Remember depending on the RPM & Induction design a few engines will opperate above that discplacement. But most all situations run about 80%.
My question is what are you looking to gain with this swap? Bigger valves?
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Offline Drone637

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Re: swapping heads?
« Reply #7 on: October 30, 2007, 12:28:51 AM »
Can't you just swap the intakes if you want to pick up the fuel injection?
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Offline Rhinoman

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Re: swapping heads?
« Reply #8 on: October 30, 2007, 05:51:26 AM »
Quote from: JoeCool on October 29, 2007, 11:16:20 PM
There's an article about measuring cylinder head volume in a motor buiding mag this month. Basically they use plexy glass bolted to the underside of the head (valves installed). drill a small hole in the plexy glass and use a metered cyrenge to fill fluid into the head and record. Then measure bore to find the volume of your cylinder BDC & TDC. 325cc ish define the "ish" and you have theoretical compression. Remember depending on the RPM & Induction design a few engines will opperate above that discplacement. But most all situations run about 80%.
My question is what are you looking to gain with this swap? Bigger valves?

Thats the usual way to do it. I can't measure my 1.3 for comparison because its been skimmed and I don't know by how much.
BMEP isn't relevant as we only need to compare heads.
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2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org
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Offline cj

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Re: swapping heads?
« Reply #9 on: October 30, 2007, 12:45:17 PM »
The combustion chamber volume of both heads are the same 32.2cc according to Suzuki. Nobody has ever proved otherwise so far although like many things on the internet some people keep saying there's a difference although they have have not checked it for themselves. There are differences in the valve sizes though with the 1.6 being larger, in particular the exhaust valve and inside the ports but this has no effect on bolting one on in place of the other..
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luvmysammy

Re: swapping heads?
« Reply #10 on: October 30, 2007, 05:39:59 PM »
so with the bigger valves, would that theoretically give me a little more bang for the buck? maybe a lil more pep, or even a little umph? thats what i am lookin for, a little more pep in the ol sammy, but cheap for now!
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Offline Rhinoman

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Re: swapping heads?
« Reply #11 on: October 31, 2007, 10:42:30 AM »
Quote from: blknight87 on October 30, 2007, 05:39:59 PM
so with the bigger valves, would that theoretically give me a little more bang for the buck? maybe a lil more pep, or even a little umph? thats what i am lookin for, a little more pep in the ol sammy, but cheap for now!

Theoretically it could work but the ports are a fair bit bigger. When I fitted the 1.3 carb to the 1.6 I opened out the inlets on the manifold to match. The exhaust fitted straight up and matched very well. The 1.6 has slightly more duration on the cam as well so that should help a little bit. Having said that the 1.3 head seems to have plenty of flow capability, with a bigger carb and a header it can make a lot more power so its not restictive in stock form. If I had the bits lying around and I hadn't already fitted a 1.6 then I might be inclined to try fitting the bigger exhaust valves in the 1.3 head with the 1.6 cam and a mild skim. I'd just give the ports and manifold a bit of a clean up and smooth out the lumpy bits.
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2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org
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Offline Yankee-Tim

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Re: swapping heads?
« Reply #12 on: November 01, 2007, 09:37:48 AM »
1.6L head on a 1.3L 1298cc EFI, with 1.6 runner, TBI spacer, hybrid 1.3/1.6 TBI, mid-range Sammy cam and a port-matched header.

I run this and it's a friggin' screamer.
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