GS motor swap
05-04-2009 | 08:44 PM
#21
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The ITR uses a B16A head, but it's ported from the factory.
Compression in the GSR (B18C1) is 10:1, the ITR's C/R is 10.6:1.
The cams in the ITR had a little bigger duration, so VTEC was moved to 6000rpm, where as it's at 4400 in the GSR because of the slightly different cams and dual stage intake manifold.
Redline for the GSR is 8000rpm, ITR had a slightly bigger redline, because of the powerband from the cams and intake.
The trans in the ITR is also a B16 trans, but with a factory helictical LSD unit.
In all, The B18C1 and B18C5 are the same motor, but with a better flowing head, slightly bumped compression and shorter geared trans.
Compression in the GSR (B18C1) is 10:1, the ITR's C/R is 10.6:1.
The cams in the ITR had a little bigger duration, so VTEC was moved to 6000rpm, where as it's at 4400 in the GSR because of the slightly different cams and dual stage intake manifold.
Redline for the GSR is 8000rpm, ITR had a slightly bigger redline, because of the powerband from the cams and intake.
The trans in the ITR is also a B16 trans, but with a factory helictical LSD unit.
In all, The B18C1 and B18C5 are the same motor, but with a better flowing head, slightly bumped compression and shorter geared trans.
on the dot.
the ITR pistons also had moly coatings on the skirts, the valvesprings were dual valvesprings and the valvetrain had lost motion assemblies. the motor mounts were supposedly stiffer too. theres more to it than that, but snakes got most of the good info.
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05-04-2009 | 09:08 PM
#22
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h:Motor mounts for the GSR and ITR were the same, they were different between the non-vtec models though, because the GSR and ITR came with braced torque mounts.
This is the non vtec torque mount:
And here's the torque mount for the GSR and ITR.. the different is the little "brace" to make it more solid, the inner section is ripped out of this one.
Oh hi, lookie at what torque mounts I ordered
Last edited by pslsnakes; 05-04-2009 at 09:11 PM.
05-04-2009 | 09:58 PM
#23
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what the weird, my torque mounts have those braces, as well as my old LS.
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05-04-2009 | 11:12 PM
#25
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well then again my first LS was a 2000, with all the weird updates.
and my current one is a GS, with all the GSR parts and specs except the motor, so who knows.
The ones from my 97 GS
and my current one is a GS, with all the GSR parts and specs except the motor, so who knows.
The ones from my 97 GS
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Last edited by Spec R; 05-04-2009 at 11:15 PM.
05-05-2009 | 05:34 AM
#26
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Ummm...... I thought ALL VTEC heads had lost motion devices. So for the most part I was right about the differences between the GSR and ITR(specifics are cool to know though)?
Last edited by jrgoswick; 05-05-2009 at 05:35 AM.
05-05-2009 | 10:48 AM
#27
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05-05-2009 | 04:09 PM
#28
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05-05-2009 | 04:39 PM
#29
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They do.. The H-series uses a spring type LMA. The ITR and GSR uses a hydraulic LMA, but they were a little stiffer in the ITR to aid the slightly more aggressive cams.
05-05-2009 | 10:06 PM
#30
The know nothing kid.
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From: AZ
weight has all to do with it, lighter car with better power output yummy taste of dirt, most stock itr's came without radios, sound proofing, itr inside is a very loud ride compared to other integra models, it is why the car was so quick also