compression ratio
December-4th-2003, 05:49 PM
#4
Salt addict
Join Date: Aug 2002
Location: Niagara Falls Ont.
Posts: 1,201
First Gen 9:1
2nd gen 9.1:1
10:1 or higher is fine for turbo, and not that difficult to achieve reliably with common sense and premium fuel, but then if you're going turbo you'll be using premium anyways.
2nd gen 9.1:1
10:1 or higher is fine for turbo, and not that difficult to achieve reliably with common sense and premium fuel, but then if you're going turbo you'll be using premium anyways.
December-4th-2003, 06:22 PM
#5
BJ Slut
Join Date: Jan 2003
Location: MD
Posts: 899
Originally posted by midnightblue97
First Gen 9:1
2nd gen 9.1:1
10:1 or higher is fine for turbo, and not that difficult to achieve reliably with common sense and premium fuel, but then if you're going turbo you'll be using premium anyways.
First Gen 9:1
2nd gen 9.1:1
10:1 or higher is fine for turbo, and not that difficult to achieve reliably with common sense and premium fuel, but then if you're going turbo you'll be using premium anyways.
December-16th-2003, 04:19 PM
#8
Protege Newbie
Join Date: Dec 2003
Posts: 4
10:1 or higher is definantly not what you want for a turbo. You'd be blowing head gaskets and predetinating left and right. You don't want to go any higher than 9:1 with a turbo setup, exspecially if your planning on running a lot of boost.
December-16th-2003, 05:04 PM
#9
Salt addict
Join Date: Aug 2002
Location: Niagara Falls Ont.
Posts: 1,201
Sigh.
Tuning is the Key.
Why do Top fuel cars run 14+:1 compression and have over driven superchargers??
If you tune properly and use high quality materials (IE headgaskets, rod/main studs etc..) you WON'T have problems.
Tuning is the Key.
Why do Top fuel cars run 14+:1 compression and have over driven superchargers??
If you tune properly and use high quality materials (IE headgaskets, rod/main studs etc..) you WON'T have problems.
December-16th-2003, 06:32 PM
#10
The beige beast!
Join Date: Sep 2002
Location: Mt. Pleasant, NC
Posts: 300
Originally posted by midnightblue97
Sigh.
Tuning is the Key.
Why do Top fuel cars run 14+:1 compression and have over driven superchargers??
If you tune properly and use high quality materials (IE headgaskets, rod/main studs etc..) you WON'T have problems.
Sigh.
Tuning is the Key.
Why do Top fuel cars run 14+:1 compression and have over driven superchargers??
If you tune properly and use high quality materials (IE headgaskets, rod/main studs etc..) you WON'T have problems.
December-16th-2003, 09:57 PM
#11
Slow, loud, cheap
Join Date: Dec 2003
Location: Oshkosh, Wisconsin
Posts: 147
Why do Top fuel cars run 14+:1 compression and have over driven superchargers??
The thinking of low *** compression with turbo is like 15 year old thinking.
And my old '93 DX driver manual said the compression is 8:1
December-17th-2003, 06:46 PM
#15
Moderator/ Pocket Tuner
Join Date: Apr 2002
Location: Tampa,Fl
Posts: 4,150
midnight, you are correct...high compression + boost is possible with proper tuning...using low compression on a turbo engine just allows for more error with fuel control...that is why tuners like it because most DIY guys like it, it's cheaper and easier, NOT better
...why do you think more modern turbo cars run higher compression than before...fuel delivery systems are more efficient and can be VERY fine tuned..most cars though are 10:1 or less compression ratio anyway, unless they are higher end sports cars and are perfectly capable of running boost
...why do you think more modern turbo cars run higher compression than before...fuel delivery systems are more efficient and can be VERY fine tuned..most cars though are 10:1 or less compression ratio anyway, unless they are higher end sports cars and are perfectly capable of running boost