possible?
04-24-2012, 11:17 AM
#16
Addict
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This one even has bi name 
04-24-2012, 12:19 PM
#18
Rainman
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Not exactly... Just looking for low end power (below 3000rpm). Horsepower is not really a concern as I believe the 951s has enough to keep me happy, but that's only above 3000 on boost. I understand with the mods come more hp and that's great but it should be noted that the goal here is to increase low end power; not insane horsepower.
04-30-2012, 02:42 PM
#19
Rennlist Member
Just wondering if anyone ever built a 944/951 2.5L engine with twin-charging, itbs, and variocam... and Is this possible with a stock bay or only with a tubular front end? I'd be more interested in acceleration vs top speed. Frank Profera's lotus elise has a twin-charged 1.8L putting out 680 hp: Do our cars have that kind of potential with similar mods?
04-30-2012, 02:58 PM
#20
Team Owner
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why did they use the 8 valve and not the 16 valve head ?
1. the RS was built for GT class and running the 16 valve heads would make too much power.
2. the Turbo S would have been the fastest steet-legal car (on any track course) that Porsche was building at the time....
couldn't have a lesser model beating the 911 in the curves and in a straight line.
in the afterworld,
seems people are less-tempted to run too much boost with the 3.0 setup.
04-30-2012, 03:03 PM
#21
AutoX
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I'm not trying to troll... just trying to learn and think outside the box. If everyone did the same things and used the same parts, there would be no progress. You're free to think what you want. I'm not sorry for trying to think of different ways to make my car reflect me. If I was trolling I'd ask how to rear-mount a twin turbo 13b on a 968 chassis with a 911 targa shell slant-nose conversion rally set-up with lambo doors.
Also, I guess I should apologize for starting another thread for the remote turbo question. I should have just asked in this thread- my bad.
Also, I guess I should apologize for starting another thread for the remote turbo question. I should have just asked in this thread- my bad.
04-30-2012, 03:37 PM
#22
Burning Brakes
1. thinking outside the box= cubic dollars.
2. low end torque on a turbo 2.5 plus good boost up top= unicorns.
it would be cool to simply use a VNT turbo, but you'd have to control it somehow. see rule #1.
have great fab skills and access to some cool parts? sweet. if not, see rule #1.
think you can just slap something together on the cheap? see rule #2.
2. low end torque on a turbo 2.5 plus good boost up top= unicorns.
it would be cool to simply use a VNT turbo, but you'd have to control it somehow. see rule #1.
have great fab skills and access to some cool parts? sweet. if not, see rule #1.
think you can just slap something together on the cheap? see rule #2.
05-02-2012, 02:42 PM
#25
Nordschleife Master
20K reasonable? Perhaps...
Lag is almost non-existent on the 968 TRS... there is a difference between spool and lag...
No, and yes if you want variocam... also remember, not many noobs know what vario cam is, or how it works.. some even reffer to it as v-tec.
OK, you have a 951S.. there I said it!
Variocam = 968 Engine plus engine management... period.
ITBs..GREAT for flat line, high RPM running.. (NOT the best for straight line accelleration... IMHO these seam to contradict what you are asking for... but hey its your $$)
Twincharging.. again why? Duals would IMHO do better based on your loose requirements...
You want best acceleration and throttle response?
How about bumping compression up to 10 or 10.5:1, and running it with low boost (say limited to 10PSI?)...
Say for example I have a 951S and I want variocam, itbs, twincharging, and the dual stage fuel system. Anyone have an estimate to how much that would cost with stock turbo and say for example 4-5k for itbs? Remember, just looking for the best acceleration and throttle response.
Lets say I have like 20k to throw around and I'm really stingy (I really don't. Just for reference). What could I get away with spending the least amount of money?
Lets say I have like 20k to throw around and I'm really stingy (I really don't. Just for reference). What could I get away with spending the least amount of money?
Variocam = 968 Engine plus engine management... period.
ITBs..GREAT for flat line, high RPM running.. (NOT the best for straight line accelleration... IMHO these seam to contradict what you are asking for... but hey its your $$)
Twincharging.. again why? Duals would IMHO do better based on your loose requirements...
You want best acceleration and throttle response?
How about bumping compression up to 10 or 10.5:1, and running it with low boost (say limited to 10PSI?)...
05-02-2012, 04:17 PM
#26
Three Wheelin'
I'll expand on Mr Burgundy's Vario-cam answer.
Vario-cam on the 968 works by advancing / retarding the intake cam in relation to the exhaust cam (either advanced or retarded 7.5deg from TDC, nothing in between). The exhaust cam is driven by the timing belt and the intake cam is driven, via a chain, by the exhaust cam. An oil pressure driven chain tensioner, with a solenoid used for activation, is what controls the intake cam indexing. Since the 8V heads use a single cam, Vario-cam cannot be fitted.
For vario-cam to be used, you either need to start with a 968 head, or a S2 head that has had the chain tensioner mounting bosses welded in.
Vario-cam on the 968 works by advancing / retarding the intake cam in relation to the exhaust cam (either advanced or retarded 7.5deg from TDC, nothing in between). The exhaust cam is driven by the timing belt and the intake cam is driven, via a chain, by the exhaust cam. An oil pressure driven chain tensioner, with a solenoid used for activation, is what controls the intake cam indexing. Since the 8V heads use a single cam, Vario-cam cannot be fitted.
For vario-cam to be used, you either need to start with a 968 head, or a S2 head that has had the chain tensioner mounting bosses welded in.
05-02-2012, 04:21 PM
#27
Nordschleife Master
And then add an engine management system capable of activating the solenoid...
05-02-2012, 04:36 PM
#28
Drifting
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you want power down low, get a smaller turbo or use a longer stroke(3.0L crankshaft). bigger engine will spool turbo sooner, smaller turbo will spool earlier.
other option, twin charge it. not impossible, but you'd have to run them in sequential turbo set-up, think mk4 supra. again, not impossible.
i'd say swap in a 2.0t from a vw or something. smaller engine, small turbo, great power possibilities.
other option, twin charge it. not impossible, but you'd have to run them in sequential turbo set-up, think mk4 supra. again, not impossible.
i'd say swap in a 2.0t from a vw or something. smaller engine, small turbo, great power possibilities.
05-02-2012, 04:41 PM
#29
Burning Brakes