272/272 cams (fix creep?)

[SRiz]

Hey I had a question to the owners of Crower or HKS 272/272 cams... Does it help at all from preventing creep, and if so how many pounds?

I after getting 3inch exhaust the boost creeps to 22psi -24psi. I ported the crap out of the housing and with 2.5 inch exhaust it held 17-18psi. Now with 3" it creeps way to high. This is the reason for the question because if the 272/272 extra Volumetric Efficiency prevents 1-2 pounds and not like 5 pounds... i might have to get external


Heres my port job any more near the wastegate and ill put a hole though it. WTF

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[SRiz]

also 32mm flapper upgrade users... Worth it?

 

[tumtum411]

What was that you ported again

 

[SRiz]

its the turbine housing on the hot side of the turbo... I also have tubular 02 housing 2.5 matched to the EVOIII housing I have done everything other then the 32mm flapper to fix creep

 

[SRiz]

I talked to my physics professor and he wasnt sure that it would fix the creep. I have heard this multiple times where does this theory come from?

 

[assault187]

cams will not cure boost creep to my knowledge...The cams will allow for MORE flow through the turbo creating more boost creep.

An properly matched external wastegate setup will prevent boost creep

 

[Yngvar]

an external dump would help creep

 

[BigSorn]

get an o2 dump, way cheaper then going external, and sounds mean.

 

[SRiz]

Well I spent $180 for the punishment racing recirc 02 and never creeped before exhaust. I dont really want a dump maybe external recirc... soooo expensiveeeeee

 

[JrCRXHF]

I got tired of the creap so i just did the supporting mods to get me to 20-22psi on pump gas.

Now creap is not an issue.

 

[No_Skillz]

If by going to a bigger flapper you actually mean opening up the wastegate hole, then yes, it will help with your creep issue. A bigger flapper by itself isn't going to do anything, but's necessary if you want to port out the wastegate hole.

 

[SethA]

I agree that cams would should make creep worse. Search for the "peepers mod". It might have some ideas to save you from having to go external. That porting you did looks pretty good to me.

As was said previously, buying the right goodies to just run higher boost might money better spent than on an external.

Only consider the big flapper if you never plan to run high boost. I have read that the big flapper can blow open at higher boost levels.

Seth