ITR cams with low boost?
03-16-2003, 02:43 PM
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ITR cams with low boost?
Well this is want I'm thinking about building:
Rebuild B16a with ITR cams with 11:1 cr low boost
*So what do you guys think? I'm going HIGH compression becuse I only want to boost less than 8psi.
*Will these cams work ok?
I wanted some cams that were a little better than the 1st gen cams.
Rebuild B16a with ITR cams with 11:1 cr low boost
*So what do you guys think? I'm going HIGH compression becuse I only want to boost less than 8psi.
*Will these cams work ok?
I wanted some cams that were a little better than the 1st gen cams.
03-17-2003, 05:12 AM
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Re: ITR cams with low boost? (b3435)
go with itr - tune out overlap with adjusible cam gears - make power till 9500rpm
I have not heard of such powerband with ITC cams with force induction.
****some please fill me in on this and verify if this is possiable.
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03-23-2003, 04:18 PM
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Re: ITR cams with low boost? (Charlie Moua)
go with itr - tune out overlap with adjusible cam gears - make power till 9500rpm
woah who the hell can do that?
I have not heard of such powerband with ITC cams with force induction.
****some please fill me in on this and verify if this is possiable.
here is a quote (looks like I was optimistic with 9500
Making it work would be getting to the dyno and tuning out the overlap until it was optimal. Theoretically speaking, retarding the intake cam -5 degrees and advancing the exhaust cam 5 degrees would eliminate 10 degrees of overlap. That may or may not be the best setup due to other factors that operate an engine, but you get the idea. The overlap added by the ITR cams that you have will be obsolete once you tune it, so don't let anyone tell you that your cams are bad for boost. Just say to whoever tell you that, "I make power all the way to a 9000rpm redline".
TR cams, ITR outer springs, Port Flow inners, Skunk2 cam gears. Ideal setup IMO.
did it and it's unreal what ITR cams do for the powerband over 8k. And to clarify about GSR cams making power over 8k, in no way am i saying that your hp curve is going to drop off after 8k. The fact of the matter is, certain cams have certian powerbands. It is the same in N/A and boost. The more lift you have, the higher the engine needs to rev to utillize it. This is why if you set your vtec to 2k it will bog like crazy (been there, done that). A GSR cam only had enough lift to feed a b18c up to 8200. ITR cams can feed the same engine up to around 9k because of the 1mm of lift added on each cam. If there is a boosted application using GSR's that has a hp curve that is still rising after, lets say 8300, it is because boost is still rising. Increasing boost is almost always going to increase hp, even if the cams gave up at 6000. What i'm talking about is an FI app that has reached peak boost by at least 5-6k and wants to keep increasing output all the way to 9k. That person would need a more aggressive cam.
& good info. i'll try searching the ClubSi form too
03-25-2003, 08:34 PM
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Re: ITR cams with low boost? (Charlie Moua)
I can say for a fact that gsr cams can carry to 10k rpm without boost creeping. We run them in our race car and have a flat power curve from 7.5 to 10k. STOCK gsr cams....
03-25-2003, 11:40 PM
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Re: ITR cams with low boost? (MotorMatrix.com)
gsr cams have 17 degrees of overlap, itr's have 25 degrees overlap. not a big difference. you can dial it out, but I doubt it does anything real beneficial in hp as opposed to spoolup. one thing I've learned from dyno graphs is if you maintain torque, hp will always keep a climbing trend. if torque starts to drop, hp will level off and basically flatline until the motors effieciency drops and torque falls off even steeper. most hondas peak torque comes in from 6-8k rpms, so basically the power will be climbing and after about 8k rpm's the motor effiecincy(torque) will fall and hp will basically flatline. finding a way to make these motors peak torque at higher rpms is what I want to know. R/S I believe is the key. got any ideas?
03-30-2003, 07:00 PM
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Re: ITR cams with low boost? (Charlie Moua)
my car made 125 more whp at 6000 rpms with gsr cams than it did with itr cams.i think it would have been more if the clutch would not have been slipping.
03-30-2003, 08:09 PM
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Re: ITR cams with low boost? (turbotypeR)
Originally posted by ninesecteg:
gsr cams have 17 degrees of overlap, itr's have 25 degrees overlap. not a big difference.
gsr cams have 17 degrees of overlap, itr's have 25 degrees overlap. not a big difference.
My ITR cams were killing my motor. We turned VTEC up to 6500 and there was still a 20 HP LOSS at the switchover point, AND torque fell flat on it face and kept falling til we stopped revving it at 7500.
Now with the 94 GSR cams I bought, I can't wait to re-dyno.
[Modified by SiR Kid, 11:14 PM 3/30/2003]
03-31-2003, 08:30 AM
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Re: ITR cams with low boost? (MotorMatrix.com)
I run ITR cams and stock cam gears and I make power to 9500. I like the aggressiveness of the ITR cams.
[Modified by FUCATYPR, 6:07 PM 3/31/2003]
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