Whats the standard bhp on a 964 turbo?
Discussion
Search is your friend here. Rennlist is probably a better place to get the technical stuff.
Realistically the following is a guide:
1Bar boost ~30bhp
Cat delete ~5bhp
Airbox ~nothing
Headers ~15bhp (in real terms, but as it shifts the boost ~30-40bhp)
Cams ~20bhp
Heads ~10-20bhp
400bhp is the limit for CIS.
Realistically the following is a guide:
1Bar boost ~30bhp
Cat delete ~5bhp
Airbox ~nothing
Headers ~15bhp (in real terms, but as it shifts the boost ~30-40bhp)
Cams ~20bhp
Heads ~10-20bhp
400bhp is the limit for CIS.
So from 320bhp to almost 400bhp is that a good for the engine or not? Only found out about the power when going through the paper work that came with it,didnt buy it for the power as I just got rid of my G,which was 520 bhp standard,I always thought standard manufactures power was best for the engine.
964 turbos use CIS. This stands for Continuous Injection System. It is a mechanical fuel injection system and requires adjustment, every so often. Or after mods have been added. This is analogous to mapping a EFI car. People can run the car lean as this can give bigger dyno figures. If it is lean, JBL930 can show you what happens.
In the old days there were no computers. So they used a system called CIS. So called because the injectors are on all the time and it is the opening and closing of the valves that manages the induction cycle. The pressure that the fuel is inject at is controlled by the metering head. This is basically a big flap that gets drawn open as the engine uses more fuel/air. This, mechanically, adjusts the control pressure to increase or decrease fuel. There is a screw on the metering head that sets the base level of fuelling. As you mod the car you'll need to turn this screw to increase the fuel delivery. This should have already been done on your car. When your turbo comes on boost, it needs more fuel. The Warm-up Regulator is used to achieve this. The Warm-up Regulator adjust the control pressure when the car is cold to add more fuel. When you come on boost, you need more fuel, so the system is used again to achieve this. If you find your car is running very rich, it is probably the WR that has failed and is "pretending" to be on boost all the time and delivering too much fuel. JBL can give you chapter and verse on this.
Once you have reach the limit of CIS you need to move to EFI. This is a great mod, but bloody expensive. It is only worth doing if you love your car in a way that is truly unholy.
Once you have reach the limit of CIS you need to move to EFI. This is a great mod, but bloody expensive. It is only worth doing if you love your car in a way that is truly unholy.
Just bought one in white, 70k immaculate condition,with full history.The only thing is never bought a modified car,and never bought a car quite so old.Always had a low mileage Porsche turbo 996/997(6000miles) and Lambo(2500miles)as sunshine cars lol,but sick of losing 20 to 40k on a car that I hardly drive! I think this ones for keeps and I dont think im going to lose any value this time I hope!
Ultra Violent said:
964 turbos use CIS. This stands for Continuous Injection System. It is a mechanical fuel injection system and requires adjustment, every so often. Or after mods have been added. This is analogous to mapping a EFI car. People can run the car lean as this can give bigger dyno figures. If it is lean, JBL930 can show you what happens.
I thought that certainly in porsche terms mechanical fuel injection meant a mechanical pump that individually pumps each injection "spurt". MFI in porsche terminology came immediately before CIS.Bert
Sounds like a gorgeous car you have purchased!
Very important to have your car set up correctly,you can safely run nearer 450 bhp i have proven with the standard turbo charger set at 1 bar and with other mods although the secret is the correct fuel curve(AFR's set correctly throughout rev range) as ultra violent has mentioned..
I have worked on setting these cars up for several years now and fueling is the key for safety and power..Once you can prove you have the correct amount of fuel going to each cylinder then check AFR's throughout the rev range you should have years of reliable fun...Your car will need to have at least a modified Warm up regulator(wur) and rpm switch(delays fuel enrichment to a chosen rpm) to acheive a near perfect fuel curve..If it dont your "co level" will just have been set high at idle and you will be running overly rich early-midrange which is not ideal for a number of reasons!! most "so-called" tuners in the UK set them up this way and it is far from ideal!
Can you list any mods if possible as maybe your car has an over inflated dyno figure and only has minor mods,,without naming and shaming i know of at least one tuning company who claim mega HP after they install only a set of their supplied headers,then dyno.lol
Very important to have your car set up correctly,you can safely run nearer 450 bhp i have proven with the standard turbo charger set at 1 bar and with other mods although the secret is the correct fuel curve(AFR's set correctly throughout rev range) as ultra violent has mentioned..
I have worked on setting these cars up for several years now and fueling is the key for safety and power..Once you can prove you have the correct amount of fuel going to each cylinder then check AFR's throughout the rev range you should have years of reliable fun...Your car will need to have at least a modified Warm up regulator(wur) and rpm switch(delays fuel enrichment to a chosen rpm) to acheive a near perfect fuel curve..If it dont your "co level" will just have been set high at idle and you will be running overly rich early-midrange which is not ideal for a number of reasons!! most "so-called" tuners in the UK set them up this way and it is far from ideal!
Can you list any mods if possible as maybe your car has an over inflated dyno figure and only has minor mods,,without naming and shaming i know of at least one tuning company who claim mega HP after they install only a set of their supplied headers,then dyno.lol
Edited by stup on Sunday 15th November 02:09
I have loads and I mean loads of reciepts,but not many reciepts which actually show what mods have been done,company called eporsche every year previous owner must have spent on average £1000, the reciepts dosent actually say what they did.Dyno tested was done by a company called Soutern Carburetters
Rocco1 said:
I have loads and I mean loads of reciepts,but not many reciepts which actually show what mods have been done,company called eporsche every year previous owner must have spent on average £1000, the reciepts dosent actually say what they did.Dyno tested was done by a company called Soutern Carburetters
eporsche? That's slightly confusing - eporsche sell used porsche's - they don't service or tune them, and they use GT-One for any work that is needed on the cars they're selling.Eporsch are primarily a Porsche sales company. They are neighbours with GT-One who probably did all the work on your car. GT-One are very well respected and knowledgeable especially with 964 era cars. A lot of 964RS owners I know trust GT-One to look after their car.
I guess the work on the car was probably arranged through Roly at Eporsche and carried out by Pete and Craig next door. Give them a call - they're very friendly and will probably know your car inside out.
www.eporsch.co.uk
www.gt-one.co.uk
I guess the work on the car was probably arranged through Roly at Eporsche and carried out by Pete and Craig next door. Give them a call - they're very friendly and will probably know your car inside out.
www.eporsch.co.uk
www.gt-one.co.uk
Rocco, reading through this my first question would have been who did the work ? One of the recognised tuners here or in europe could well get 400 bhp, but at price.
Reading further you suggest a £1000 was spent, for this I would suggest nothing more has been done other than a chip, filter, and rolling road set up.
If I were you and you really want to know, I would put on a recognised rolling road to get the figure, if the car runs well and you are happy then why go to the expence from your perspective.
I am not an expert on early turbos but thought power was more like 260 /300bhp as standard.
Yours sounds like a nice car, and you wont be loosing fortunes on it like the others.
Regards
Reading further you suggest a £1000 was spent, for this I would suggest nothing more has been done other than a chip, filter, and rolling road set up.
If I were you and you really want to know, I would put on a recognised rolling road to get the figure, if the car runs well and you are happy then why go to the expence from your perspective.
I am not an expert on early turbos but thought power was more like 260 /300bhp as standard.
Yours sounds like a nice car, and you wont be loosing fortunes on it like the others.
Regards
In 1974 Porsche introduced the first production turbocharged 911. Although called simply Porsche 911 Turbo in Europe, it was marketed as Porsche 930 (930 being its internal type number) in North America. The body shape is distinctive thanks to wide wheel-arches to accommodate the wide tires, and a large rear spoiler often known as a "whale tail" on the early cars, and "tea-tray" on the later ones. Starting out with a 3.0 L engine 260 PS (190 kW; 260 hp), these early cars are known for their exhilarating acceleration coupled with challenging handling characteristics and extreme turbo lag. For 1978, capacity rose to 3.3 L 300 PS (220 kW; 300 hp), and an intercooler was added which was placed under the rear spoiler.
In 1990 Porsche introduced a Turbo version of the 964 series. This car is sometimes mistakenly called 965 (this type number actually referred to a stillborn project that would have been a hi-tech turbocharged car in the vein of the 959). For the 1991 and 1992 model years, Porsche produced the 964 Turbo with the 930's proven 3.3 L engine, improved to produce 320 PS (235 kW). 1993 brought the Carrera 2/4's 3.6 L engine, now in turbo-charged form and sending a staggering 360 PS (265 kW) to the rear wheels. With the 993 on the way, this car was produced through 1994 and remains rather rare
In 1990 Porsche introduced a Turbo version of the 964 series. This car is sometimes mistakenly called 965 (this type number actually referred to a stillborn project that would have been a hi-tech turbocharged car in the vein of the 959). For the 1991 and 1992 model years, Porsche produced the 964 Turbo with the 930's proven 3.3 L engine, improved to produce 320 PS (235 kW). 1993 brought the Carrera 2/4's 3.6 L engine, now in turbo-charged form and sending a staggering 360 PS (265 kW) to the rear wheels. With the 993 on the way, this car was produced through 1994 and remains rather rare
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