B16B block to B18C1 head
12-27-2002, 10:32 AM
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B16B block to B18C1 head
Will a B16B(CTR) block bolt right up to a B18C1(GSR) head? If it does, are there other things that I will need to get this to work? Thanks.
12-27-2002, 09:42 PM
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Re: B16B block to B18C1 head (breakdancer)
Why? What's wrong with a GSR head on CTR block? "OMG!!! your destroying the all holy Type R engine by putting that inferior head on there!"
Maybe he has a GSR head with full headwork on it. Maybe it's just stock and he can get a good deal on a CTR block.
Yes, the GSR head will bolt up fine to the CTR block. The compression will be about 11.2:1.
Maybe he has a GSR head with full headwork on it. Maybe it's just stock and he can get a good deal on a CTR block.
Yes, the GSR head will bolt up fine to the CTR block. The compression will be about 11.2:1.
12-28-2002, 02:21 PM
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Re: B16B block to B18C1 head (RyanR)
I'm doing it cause my GSR bottom end went out on me. I can get a B16B shortblock for a good price. The B18C1 head is a JG Engine Dynamics head with a Crower full race valvetrain with Jun Stage 3 cams. I'm was just wondering if it would be smarter to spend another 1000 for a B18C1 shortblock? Didn't seem like it to me, so I was gonna go with the CTR block. Thanks for the input guys.
12-28-2002, 07:06 PM
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Re: B16B block to B18C1 head (Spoon92)
It will bolt up and work. I would clay the motor before final assembly, especially if you are running the Jun 3's and adjustable cam gears. With the compression you are going to be running (12:1+), you are going to need some good tuning as well.
12-28-2002, 09:25 PM
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Re: B16B block to B18C1 head (b19coupe)
It will bolt up and work. I would clay the motor before final assembly, especially if you are running the Jun 3's and adjustable cam gears. With the compression you are going to be running (12:1+), you are going to need some good tuning as well.
i say go for it. revvin up to 9k all day sounds nice.
[Modified by djhatch, 6:26 AM 12/29/2002]
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12-29-2002, 10:54 AM
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Re: B16B block to B18C1 head (djhatch)
Stock GSR compression is 10:1. Stock USDM Type-R compression is 10.6:1. A GSR with USDM Type-R pistons is around 11:1. The dome on a CTR piston is considerably higher than a USDM Type-R piston. The combustion chamber in a GSR head is quite a bit smaller than a CTR or ITR head. I don't know the exact number, but an engine with CTR pistons and a GSR head has around a 12.4:1 compression ratio. There is a formula on Cspeed racing's website with a compression calculator that will give an exact number, if you know the combustion chamber volume and the piston dome volume.
And given the choice between a B16 and a B18, I would choose a B18 for the torque advantage.
And given the choice between a B16 and a B18, I would choose a B18 for the torque advantage.
12-29-2002, 04:21 PM
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Re: B16B block to B18C1 head (b19coupe)
You forget that the CTR engine is 1.6L while the GSR/Type R is 1.8L. Less displacement means lower compression ratio with the same head.
12-29-2002, 08:32 PM
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Re: B16B block to B18C1 head (RyanR)
You forget that the CTR engine is 1.6L while the GSR/Type R is 1.8L. Less displacement means lower compression ratio with the same head.
12-29-2002, 09:04 PM
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Re: B16B block to B18C1 head (RyanR)
You forget that the CTR engine is 1.6L while the GSR/Type R is 1.8L. Less displacement means lower compression ratio with the same head.
I used Cspeed's compression ratio calculator-
http://www.c-speedracing.com/howto/c...c/compcalc.php
I stand corrected.Apologies to all.
12-29-2002, 11:07 PM
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Re: B16B block to B18C1 head (b19coupe)
You forget that the CTR engine is 1.6L while the GSR/Type R is 1.8L. Less displacement means lower compression ratio with the same head.
My bad. The shorter stroke of the b16 (77mm) vs. the longer stroke of the B18C (87.2mm) does indeed change the compression ratio. The greater cylinder volume of the B18C compressed into the same amount of space as the lesser cylinder volume of the B16 does equal more compression. Compression ratio of the B16 block and PCT (CTR) pistons with a GSR head and an OEM 3 layer head gasket = 11.074818055113727:1. Compression ratio of a B18C with CTR pistons and a GSR head with an OEM 3 layer head gasket =12.409404342933987:1.
I used Cspeed's compression ratio calculator-
http://www.c-speedracing.com/howto/c...c/compcalc.php
I stand corrected.Apologies to all.
My bad. The shorter stroke of the b16 (77mm) vs. the longer stroke of the B18C (87.2mm) does indeed change the compression ratio. The greater cylinder volume of the B18C compressed into the same amount of space as the lesser cylinder volume of the B16 does equal more compression. Compression ratio of the B16 block and PCT (CTR) pistons with a GSR head and an OEM 3 layer head gasket = 11.074818055113727:1. Compression ratio of a B18C with CTR pistons and a GSR head with an OEM 3 layer head gasket =12.409404342933987:1.
I used Cspeed's compression ratio calculator-
http://www.c-speedracing.com/howto/c...c/compcalc.php
I stand corrected.Apologies to all.
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