itr and ctr?
Pull my finger
Joined: Apr 2004
Posts: 41,423
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From: Arizona
No you wouldn't, unless you're a godly driver or the other driver sucks... they lose a minimal amount of torque in return for a little bit more HP
I missed Sean
Joined: Aug 2004
Posts: 11,285
Likes: 1
From: Fairfield/Bridgeport CT
.....the cams, the cams are why. gsr cams have more lift and duration then b16/b17 cams do. but then, ctr and itr cams are more agressive then that even. and im pretty sure that the valves and springs are stronger too. but, a gsr head does not flow as well as a b16 head does NA, but, under boost, a gsr head is more ideal because of the shape of the combustion chamber and i think the ports are different too, but, they also yield a higher compression. so, in my opinoin a true poor mans itr should atleast have the same valvetrain, other wise its nothing like an itr/ctr head
stock flow:
PR3(B18)>P72(GS-R)>PR3(B16)
modified flow:
P72(GSR)>PR3(all)
compression:
P72>PR3(all)
as you can see modified the p72 will beat it out in both sections. unmodified the pr3 from the ITR has bettter flow, but the compression loss is greater than what is gained from the flow, so it's a mute point.
the gsr head is hands down the best b-series head that was produced, the only reason the ITR got the pr3 head is because there were too many stockpiled from the old b16's.
cam profiles are a whole other story, but it's not like it matters, without the compression to back up the more agressive profiles there isn't much to gain. the type-r merely overcame this by using pistons with an increased dome volume to increase compression.
I missed Sean
Joined: Aug 2004
Posts: 11,285
Likes: 1
From: Fairfield/Bridgeport CT
there should be no horsepower gains at all with using a b16 head. the flow characteristics and combustion chamber volume are both downgraded.
the use of a type-r head will still have the same effect, with minimal if any gains in the top end.
an LS motor in a EG will most likely crush a castrated GS-R
my bum is on the swedish!
Joined: Mar 2002
Posts: 10,133
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From: San Antonio, Texas
turning u inside out
Joined: Oct 2003
Posts: 2,545
Likes: 0
From: cortland, ohio
[QUOTE=sherwood;3082769]oye
stock flow:
PR3(B18)>P72(GS-R)>PR3(B16)
modified flow:
P72(GSR)>PR3(all)
compression:
P72>PR3(all)
as you can see modified the p72 will beat it out in both sections. unmodified the pr3 from the ITR has bettter flow, but the compression loss is greater than what is gained from the flow, so it's a mute point.
the gsr head is hands down the best b-series head that was produced, the only reason the ITR got the pr3 head is because there were too many stockpiled from the old b16's.
cam profiles are a whole other story, but it's not like it matters, without the compression to back up the more agressive profiles there isn't much to gain. the type-r merely overcame this by using pistons with an increased dome volume to increase compression.[/QUOT
u listed that, but u did notshow at what rpm. the gsr head will out flow a b16 head up at around like 9.5k, but bottom mid and most of ur top end. not many people will rev there motor that high daily.
stock flow:
PR3(B18)>P72(GS-R)>PR3(B16)
modified flow:
P72(GSR)>PR3(all)
compression:
P72>PR3(all)
as you can see modified the p72 will beat it out in both sections. unmodified the pr3 from the ITR has bettter flow, but the compression loss is greater than what is gained from the flow, so it's a mute point.
the gsr head is hands down the best b-series head that was produced, the only reason the ITR got the pr3 head is because there were too many stockpiled from the old b16's.
cam profiles are a whole other story, but it's not like it matters, without the compression to back up the more agressive profiles there isn't much to gain. the type-r merely overcame this by using pistons with an increased dome volume to increase compression.[/QUOT
u listed that, but u did notshow at what rpm. the gsr head will out flow a b16 head up at around like 9.5k, but bottom mid and most of ur top end. not many people will rev there motor that high daily.
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