turbo
09-14-2009, 08:56 PM
#1
Three Wheelin'
Thread Starter
turbo
Well got a quotes on a stage 1 promotve turbo setup installed for my car for $7200. Would be low boost and leave engine stock. Probably around 350 hp with out an intercooler and 400hp with but additional 3k for that.
I thought would be more. I think I will go with it. Anyone else do with a stock motor and just low boost? about .35 bar and is upgradeable to over 600 hp with time and money.
Not going supercharger more money and less power and not upgradeable. Not wanting to start a blower/supercharger war just not interested in it.
I thought would be more. I think I will go with it. Anyone else do with a stock motor and just low boost? about .35 bar and is upgradeable to over 600 hp with time and money.
Not going supercharger more money and less power and not upgradeable. Not wanting to start a blower/supercharger war just not interested in it.
09-14-2009, 11:20 PM
#2
Three Wheelin'
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...so mild boost set up (you will be running 5 p.s.i. correct?) by formula will give - at best gain of about 85hp
( forced induction formula 5/14.7 x stock motor hp) & that will be at the crank....so perhaps 80% will get to the wheels for a rwHP gain of somewhere around 68 plus/minus.
that is - in my view really expensive HP....and forced induction dropped onto an engine with a compression ratio of 11:1 (mild boost or not) is a bit like walking on a minefield.......
getting it to higher range with just an intercooler only provides in my view greater change of failure at WOT.....getting it to the higher ranges as you have alluded to is proper & necessitates full bottom end rebuild with low compression - forged internals, bigger stroke, and porting. if this is a long term build out you might consider the engine side 1st rather than an expensive bolt on....up front.
personal opinion
(2 prior supercharged cars, latterly 04 cobra, whipple blower @ 15p.s.i. , BAP, MAFia, fuel rails- 575rwHP)
( forced induction formula 5/14.7 x stock motor hp) & that will be at the crank....so perhaps 80% will get to the wheels for a rwHP gain of somewhere around 68 plus/minus.
that is - in my view really expensive HP....and forced induction dropped onto an engine with a compression ratio of 11:1 (mild boost or not) is a bit like walking on a minefield.......
getting it to higher range with just an intercooler only provides in my view greater change of failure at WOT.....getting it to the higher ranges as you have alluded to is proper & necessitates full bottom end rebuild with low compression - forged internals, bigger stroke, and porting. if this is a long term build out you might consider the engine side 1st rather than an expensive bolt on....up front.
personal opinion
(2 prior supercharged cars, latterly 04 cobra, whipple blower @ 15p.s.i. , BAP, MAFia, fuel rails- 575rwHP)
09-15-2009, 09:48 AM
#4
Three Wheelin'
Thread Starter
well done some research and with really low boost should be fine. Your correct probably 80 hp gain at the crank and 60-65 at the wheels gain. The great thing about this system is that it is upgradeable. You can increase boost add intercooler and drop compression down the road and get increase in HP
Rasberry not into the superchargers are more money for our car and less HP and not upgradeable.
I am not looking into a huge engine rebuild until it needs it but motor was rebuilt 10,000 miles ago
Rasberry not into the superchargers are more money for our car and less HP and not upgradeable.
I am not looking into a huge engine rebuild until it needs it but motor was rebuilt 10,000 miles ago
09-15-2009, 12:11 PM
#6
Three Wheelin'
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well done some research and with really low boost should be fine. Your correct probably 80 hp gain at the crank and 60-65 at the wheels gain. The great thing about this system is that it is upgradeable. You can increase boost add intercooler and drop compression down the road and get increase in HP
Rasberry not into the superchargers are more money for our car and less HP and not upgradeable.
I am not looking into a huge engine rebuild until it needs it but motor was rebuilt 10,000 miles ago
Rasberry not into the superchargers are more money for our car and less HP and not upgradeable.
I am not looking into a huge engine rebuild until it needs it but motor was rebuilt 10,000 miles ago
looking fwd. to seeing the installation and dyno sheet.
09-15-2009, 12:55 PM
#7
Three Wheelin'
Thread Starter
Rasberry why would a supercharger run cooler? Just curious. True the supercharger would run at lower rpms just because it is belt driven but you do give that up in HP loss.
It is a promotive stage 1 kit made for our 964.
It is a promotive stage 1 kit made for our 964.
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09-15-2009, 01:02 PM
#8
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Seems like an intercooler would be a very good idea for a turbo, not an upgrade.
09-15-2009, 01:23 PM
#9
Is is a used kit? I thought the kit is $9.3K for the 964 according to Promotive web site.
BTW, there is a member on the 993 board who documented his 993 Promotive install.
BTW, there is a member on the 993 board who documented his 993 Promotive install.
09-15-2009, 01:23 PM
#10
Is is a used kit? I thought the kit is $9.3K for the 964 according to Promotive web site.
BTW, there is a member on the 993 board who documented his 993 Promotive install.
BTW, there is a member on the 993 board who documented his 993 Promotive install.
09-15-2009, 03:04 PM
#13
09-15-2009, 03:45 PM
#15
Rennlist Member
I think we are getting carried away there are pros and cons to both. The supercharger works off the crank and it causes drag, the unit is installed in lieu of the intake and generates heat which is radiated into the engine compartment. This heat is drawn into the system just as the turbo gains heat from the hot side of the turbo, making it harder to compress the gases without an IC.
Depending on who is selling you the product they can show you proof that their system is superior.
What is important here is not the HP gain but how much torque will be gained and where?
Depending on who is selling you the product they can show you proof that their system is superior.
What is important here is not the HP gain but how much torque will be gained and where?