Head shaving and horsepower??
10-02-2003, 08:55 PM
#1
Burning Brakes
Thread Starter
Head shaving and horsepower??
Can one safely obtain more power by shaving the head on the 968 to increase compression?
What is stock compression on these guys 10:1 ..?
If it can be done how much can the compression be incresed and what sort of HP/TQ gains can reasonably be attained.
Thanks
Ross
What is stock compression on these guys 10:1 ..?
If it can be done how much can the compression be incresed and what sort of HP/TQ gains can reasonably be attained.
Thanks
Ross
10-02-2003, 09:00 PM
#2
I used to keep my head shaved and it definitely gave the impression of more power. 6'5" with a shaved head and surly attitude, if not powerful certainly scarey.
Sorry. Now let's return to the original topic.
Sorry. Now let's return to the original topic.
10-03-2003, 01:50 AM
#7
Burning Brakes
Join Date: Jun 2001
Location: AZ
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Originally posted by Travis - sflraver
You dont want to go over around 12.5:1 as a rule of thumb.
You dont want to go over around 12.5:1 as a rule of thumb.
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10-03-2003, 03:58 PM
#9
Three Wheelin'
According to my computer dyno program going from 11 to 1 to 12 to 1 would have a net increase of about 7 HP.
You are going to have a hard time finding high enough octane gas to support that compression ratio though. I have 10.7 to 1 on my 944 N/a with a guru chip and it still pings under load running 93 octane gas.
You are going to have a hard time finding high enough octane gas to support that compression ratio though. I have 10.7 to 1 on my 944 N/a with a guru chip and it still pings under load running 93 octane gas.
10-03-2003, 11:33 PM
#11
Race Car
Originally posted by david fracolli
You are going to have a hard time finding high enough octane gas to support that compression ratio though. I have 10.7 to 1 on my 944 N/a with a guru chip and it still pings under load running 93 octane gas.
You are going to have a hard time finding high enough octane gas to support that compression ratio though. I have 10.7 to 1 on my 944 N/a with a guru chip and it still pings under load running 93 octane gas.
10-04-2003, 12:55 AM
#12
Three Wheelin'
I agree that the head design between a 968 and a 944 is completely different. 11 to 1 compression ratio is one thing but 12 to 1 is whole different ball game.
Danno, actually I have been playing around with the FQS switch and it does make a difference. The point I was trying to make though is that 12 to 1 compression is awfull high for a daily driven street car running even 93 octane gas.
Danno, actually I have been playing around with the FQS switch and it does make a difference. The point I was trying to make though is that 12 to 1 compression is awfull high for a daily driven street car running even 93 octane gas.
10-04-2003, 01:13 AM
#13
Nordschleife Master
stock s2 is 10.9? so I would think with a good gas with tulean you shouldn't have problems with 12:1.
I really don't know what I am talking about but thats my $.02
I really don't know what I am talking about but thats my $.02
