272 cam idle problem again
Jul 10, 2003, 10:36 AM
#16
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Its good to see you guys know your stuff!
To really exploit the cams, the gears (called venier pullies overseas just in case you are on forums in other countries) are really needed. Problem is that you will dial out a bit of top end power becuase of the needed adjustments
IMH, 262/272 gives the best overall compromise of performance and power, with only a minor hiccup at idle without the need for cam gears.
To really extract the power of the cam gears, will definately require some form of programmable engine management (what you use does not matter nearly as much as who programs it for you)
To really exploit the cams, the gears (called venier pullies overseas just in case you are on forums in other countries) are really needed. Problem is that you will dial out a bit of top end power becuase of the needed adjustments
IMH, 262/272 gives the best overall compromise of performance and power, with only a minor hiccup at idle without the need for cam gears.
To really extract the power of the cam gears, will definately require some form of programmable engine management (what you use does not matter nearly as much as who programs it for you)
Aug 1, 2003, 06:52 AM
#17
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Re: 272 cam idle problem again
Originally posted by maki
this bad idle problem has been discussed over and over again, but many people still dont understand
272 (high lift cams) will idle badly when the car is not tuned properly.
you wont gain 60 hp when you install those cams and your car probably wont idle too well.
BIgger is not always better.
rmr is not perfect but in this case they are not the person to blame for the idle problem
just my .02 cents
this bad idle problem has been discussed over and over again, but many people still dont understand
272 (high lift cams) will idle badly when the car is not tuned properly.
you wont gain 60 hp when you install those cams and your car probably wont idle too well.
BIgger is not always better.
rmr is not perfect but in this case they are not the person to blame for the idle problem
just my .02 cents
Shawn
Aug 1, 2003, 07:01 AM
#18
Re: 272 cam idle problem again
Originally posted by maki
Shawn, rmr is my competition and I see they pissed you off real good, but..
272 cams will have idle issues, you have to fuel tune your car really good to get rid of the idle problem. Those cams are designed with hks springs (even though some people dont think so) and will make a difference on 400hp + car.
Shawn, rmr is my competition and I see they pissed you off real good, but..
272 cams will have idle issues, you have to fuel tune your car really good to get rid of the idle problem. Those cams are designed with hks springs (even though some people dont think so) and will make a difference on 400hp + car.
know what youre doing, get a mechanic who knows what he's doing.
Aug 1, 2003, 08:18 AM
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Question about the 264/272 combo: (sounds tasty)
What is the compromise with these cams? vs. stock
Where do these cams begin to make power? I'm looking to increase area under the curve more than peak HP, or I'll sacrifice a little HP for more torque. Can you do some neat things with the power band if you also use adjustable sprockets?
Does the exhaust note change a little with them? (better?)
What's the average amount of power, hp/tq, that this combo makes across the board?
(I loved having cams in my old SR20DE, the right ones anways =)
This will be a 100% daily driven street car and will stay with the stock turbo until it dies.
TIA
What is the compromise with these cams? vs. stock
Where do these cams begin to make power? I'm looking to increase area under the curve more than peak HP, or I'll sacrifice a little HP for more torque. Can you do some neat things with the power band if you also use adjustable sprockets?
Does the exhaust note change a little with them? (better?)
What's the average amount of power, hp/tq, that this combo makes across the board?
(I loved having cams in my old SR20DE, the right ones anways =)
This will be a 100% daily driven street car and will stay with the stock turbo until it dies.
TIA
Aug 1, 2003, 08:39 AM
#21
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Originally posted by DrMerl
Question about the 264/272 combo: (sounds tasty)
What is the compromise with these cams? vs. stock
Where do these cams begin to make power? I'm looking to increase area under the curve more than peak HP, or I'll sacrifice a little HP for more torque. Can you do some neat things with the power band if you also use adjustable sprockets?
Does the exhaust note change a little with them? (better?)
What's the average amount of power, hp/tq, that this combo makes across the board?
(I loved having cams in my old SR20DE, the right ones anways =)
This will be a 100% daily driven street car and will stay with the stock turbo until it dies.
TIA
Question about the 264/272 combo: (sounds tasty)
What is the compromise with these cams? vs. stock
Where do these cams begin to make power? I'm looking to increase area under the curve more than peak HP, or I'll sacrifice a little HP for more torque. Can you do some neat things with the power band if you also use adjustable sprockets?
Does the exhaust note change a little with them? (better?)
What's the average amount of power, hp/tq, that this combo makes across the board?
(I loved having cams in my old SR20DE, the right ones anways =)
This will be a 100% daily driven street car and will stay with the stock turbo until it dies.
TIA
if it worked JUN and HKS would sell it
Aug 1, 2003, 08:53 AM
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?????
How do we find out more about this?
I know on NA cars that we could get some interesting results with mixing and matching OE cams with various new cam creations. I know a turbo car use cams to enhance it's design more than the engine itself (iirc). Can someone refresh what types of cams and combos are beneficial for a turbo ?
How do we find out more about this?
I know on NA cars that we could get some interesting results with mixing and matching OE cams with various new cam creations. I know a turbo car use cams to enhance it's design more than the engine itself (iirc). Can someone refresh what types of cams and combos are beneficial for a turbo ?
Aug 1, 2003, 09:07 AM
#24
Are we mixing up duration and lift. The 270 is the the duration or the amount of time the value is opened. This affect idle more than a higher lift. Lift is usually quoted at 10 something depending on the cam. Tomei has a lower duration (260) but higher lift cam that should be better suited for the street.
Aug 1, 2003, 11:18 AM
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272 cams are not intended for road cars but
for track cars who will slightly benefit from the increased duration. Idle is not an issue for racing. For road cars with perfect or close to perfect idle, 264s are recommended.
for track cars who will slightly benefit from the increased duration. Idle is not an issue for racing. For road cars with perfect or close to perfect idle, 264s are recommended.
Aug 1, 2003, 11:32 AM
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Originally posted by value
Are we mixing up duration and lift. The 270 is the the duration or the amount of time the value is opened. This affect idle more than a higher lift. Lift is usually quoted at 10 something depending on the cam. Tomei has a lower duration (260) but higher lift cam that should be better suited for the street.
Are we mixing up duration and lift. The 270 is the the duration or the amount of time the value is opened. This affect idle more than a higher lift. Lift is usually quoted at 10 something depending on the cam. Tomei has a lower duration (260) but higher lift cam that should be better suited for the street.
me no understand
jun 264's 10.5 intake and 10.5 exhaust (an example)
im not sure what value is trying to say and how any other set up would be beneficial for good idle
Aug 2, 2003, 05:50 PM
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Originally posted by maki
huh? 260 duration but higher lift?
me no understand
jun 264's 10.5 intake and 10.5 exhaust (an example)
im not sure what value is trying to say and how any other set up would be beneficial for good idle
huh? 260 duration but higher lift?
me no understand
jun 264's 10.5 intake and 10.5 exhaust (an example)
im not sure what value is trying to say and how any other set up would be beneficial for good idle
FYI The Parts recommendation for the VII does indeed specify 264/272 combo..
If anyone can tell me how to upload pictures.. I'll send the japanese catalog page on that 
