High Boost Pulley on 91 octane??
05-26-2004, 04:09 AM
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High Boost Pulley on 91 octane??
Does any one know if the HBP-5.5lbs from Comptech will work on California's 91 gas or is running it on 91? If not, is there some sort of additive or octane booster available out there which could be used with it?
Thanks in advance.
Thanks in advance.
05-26-2004, 04:14 AM
#2
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i don't think they reccommend using the HBP w/ 91 octane.
check out this link. http://www.acura-cl.com/forums/showt...octane+booster
check out this link. http://www.acura-cl.com/forums/showt...octane+booster
05-26-2004, 06:47 AM
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Per our conversation yesterday, quite honestly we don't know for sure. The theorectical maximum boost for the 91 octane on 10.5:1 CR is about 5.5 PSI non-intercooled boost, which is where the pulley would put it. On 93 octane and the same non-intercooled boost it is about 6.5 PSI.
So in theory it could work fine. I would love to see someone try it; they can always go back if knock is present.
So in theory it could work fine. I would love to see someone try it; they can always go back if knock is present.
05-26-2004, 06:51 AM
#4
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you hear that Glenn?
05-26-2004, 07:09 AM
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Originally posted by scalbert
Per our conversation yesterday, quite honestly we don't know for sure. The theorectical maximum boost for the 91 octane on 10.5:1 CR is about 5.5 PSI non-intercooled boost, which is where the pulley would put it. On 93 octane and the same non-intercooled boost it is about 6.5 PSI.
So in theory it could work fine. I would love to see someone try it; they can always go back if knock is present.
Per our conversation yesterday, quite honestly we don't know for sure. The theorectical maximum boost for the 91 octane on 10.5:1 CR is about 5.5 PSI non-intercooled boost, which is where the pulley would put it. On 93 octane and the same non-intercooled boost it is about 6.5 PSI.
So in theory it could work fine. I would love to see someone try it; they can always go back if knock is present.
Thanks
05-26-2004, 11:40 PM
#7
Safety Car
Originally posted by scalbert
Per our conversation yesterday, quite honestly we don't know for sure. The theorectical maximum boost for the 91 octane on 10.5:1 CR is about 5.5 PSI non-intercooled boost, which is where the pulley would put it. On 93 octane and the same non-intercooled boost it is about 6.5 PSI.
So in theory it could work fine. I would love to see someone try it; they can always go back if knock is present.
Per our conversation yesterday, quite honestly we don't know for sure. The theorectical maximum boost for the 91 octane on 10.5:1 CR is about 5.5 PSI non-intercooled boost, which is where the pulley would put it. On 93 octane and the same non-intercooled boost it is about 6.5 PSI.
So in theory it could work fine. I would love to see someone try it; they can always go back if knock is present.
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05-26-2004, 11:56 PM
#8
Subie Dubie
Originally posted by allmotor_2000
The S/C I installed on power3dfx's car is with the HBP... and its running on CA 91-octane
The S/C I installed on power3dfx's car is with the HBP... and its running on CA 91-octane
05-27-2004, 01:29 AM
#10
Blown is Best
Originally posted by allmotor_2000
The S/C I installed on power3dfx's car is with the HBP... and its running on CA 91-octane
The S/C I installed on power3dfx's car is with the HBP... and its running on CA 91-octane
05-27-2004, 06:42 AM
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Originally posted by allmotor_2000
The S/C I installed on power3dfx's car is with the HBP... and its running on CA 91-octane
The S/C I installed on power3dfx's car is with the HBP... and its running on CA 91-octane
05-27-2004, 10:23 AM
#12
Safety Car
Power3dfx lives where I live... it gets to 100+ during the summer and all we have is 91-octane. He has the Velocity-something HBP, not the Comptech one; figure its the same. I drove his car, raced next to him etc., didn't hear any knock.
05-27-2004, 10:56 AM
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Originally posted by allmotor_2000
He has the Velocity-something HBP, not the Comptech one; figure its the same.
He has the Velocity-something HBP, not the Comptech one; figure its the same.
Winters are pretty mild there but it can still get cool at night. That is when the knock, if any, will appear. It seems that during the warmer weather the ECU pulls enough timing to keep knock at bay.
05-27-2004, 08:49 PM
#15
Blown is Best
Originally posted by scalbert
Winters are pretty mild there but it can still get cool at night. That is when the knock, if any, will appear. It seems that during the warmer weather the ECU pulls enough timing to keep knock at bay.
Winters are pretty mild there but it can still get cool at night. That is when the knock, if any, will appear. It seems that during the warmer weather the ECU pulls enough timing to keep knock at bay.
05-27-2004, 08:55 PM
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summers rarely reach 100+ here, but they do in the area allmotor lives in. i am closer to the santa monica bay and that means i usually get 10 degrees difference between the sf valley and santa monica area.
i think in the summer the 10 degree gap will widen as the ocean tends to take longer to heat up than land and can therefore cool us down better here. but as steve points out, knock isnt a problem with higher temps. and in cali, the coldest ive seen is nothing below 50, and even numbers approaching that is rare as well.
i run nothing but Chevron 91, and i am generally a calm driver. I will try mixing some 76 100 octane to achieve a rating of 93-94 and see if that makes a difference at all.
but overall i think you can get away with it. only time will tell..
i think in the summer the 10 degree gap will widen as the ocean tends to take longer to heat up than land and can therefore cool us down better here. but as steve points out, knock isnt a problem with higher temps. and in cali, the coldest ive seen is nothing below 50, and even numbers approaching that is rare as well.
i run nothing but Chevron 91, and i am generally a calm driver. I will try mixing some 76 100 octane to achieve a rating of 93-94 and see if that makes a difference at all.
but overall i think you can get away with it. only time will tell..
yeah right!!
05-28-2004, 02:33 AM
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Originally posted by scalbert
If he had gotten it from VR it would most likely have been the Comptech unit.
Winters are pretty mild there but it can still get cool at night. That is when the knock, if any, will appear. It seems that during the warmer weather the ECU pulls enough timing to keep knock at bay.
If he had gotten it from VR it would most likely have been the Comptech unit.
Winters are pretty mild there but it can still get cool at night. That is when the knock, if any, will appear. It seems that during the warmer weather the ECU pulls enough timing to keep knock at bay.
That would have been the Comptech HBP.
05-28-2004, 07:16 AM
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Originally posted by Allout
Wow. My mind was in a different direction with the less dense mixture in high temp.
Wow. My mind was in a different direction with the less dense mixture in high temp.
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