So when are you installing this and driving to work?

Can that question be anymore wrong? Or is it so wrong that it might be right?

 

How much Boost can a SRT handle? With still being reliable. On the N/A cars, is the lower half of the engine the same as the SRT?

 

Couldn't be anymore wrong.


Honestly I have no clue, but that's how I answer stuff now. I just did it at work, it's the perfect answer.



I can't login to the payroll system can you help?

Couldn't be anymore wrong,

 

Yes and no. Same block, same crank save the different mounting bolts for the flywheel but the pistons and connecting rods are in fact different.

 

So would it be wise to say, that you shoudn't go throwing 20 to 25 boost on a N/A crossfire. Since the lower half of the engine can't handle it. I think that less than 1% of SRT owners will be interested in going the turbo route! On the other hand, I could see the N/A guys scooping them up! I hope Euorcharged gets that SRT doing low 10's.. This is a interesting thread........I'll shut up now!

 

Well let's see there's V-6 turbo pickups runnin 10's, 4 banger Honda Civics runnin 11's and God knows what else out there with off the shelve turbo kits runnin at least 12's. Dare I say the cranks and journals in our lower ends be any less robust than a Honda Civic ??? Hmmmm....interesting indeed !!!

 

Calm down there, big fella.

Just like most of the folks on here, we like to take things a little slow and make sense of things first. We stopped drinking Kool-Aid when we were children, and most of us are just too old and tired to get excited about things before figuring them out first. You're acting like I made fun of your *****.

I do math and physics. Here's the compressor map from a T04E 50 trim compressor wheel, which is basically what is used by Turbonetics, ATP Turbo, etc to produce their T3/T4 hybrids:


Assume that you're pushing 100% VE and a BSFC of 0.60 - assuming 70% compressor efficiency and a perfectly efficient intercooler, you're looking at about 8.7 bhp/lb/min airflow at an 11.5:1 AFR. Let's say you're pushing half boost of a stock SRT6, or a nominal pressure ratio of 1.50. The airflow needed to feed the engine the required 40.5 lb/min airflow at the pressure ratio isn't even on the compressor map. The choke line on that turbo hits at about 32 lb/min at that pressure ratio. You're talking about sub-50% efficiency at that range. We're talking about BSFC rising to 0.70 or higher and power reduction to around the 300 bhp level at the crank - and that's with an efficient intercooler in between the turbo and the intake.

The bottom line is this: physics says you need to push about 12 psi on that turbo just to feed enough air to generate 350hp.

Nothing personal.

And yes, that turbo is small. puny. Sorry, buddy.

 

Which could be all fine and dandy but the Supercharger would have to push more to get the same results because of the horsepower it takes to move that air. So the end result is the Turbo will make more power with less.

Looks a little rough to be honest, not something that you'd want to take a 2 hour drive in but it works. I think placement could have been a little more thought out the intake looks a bit restrictive but it works and I think that's what they were trying to get across that it does work.

All in all good job in making it work and showing that it can be done. I think once they get it fine tuned they will have numbers equal to what the 20psi Superchargers are doing with about half the boost.

 

Well I'll respect your opinion, but I have to say, in person it looks pretty damn impressive. Considering everything short of the turbo and BOV were custom fabricated in house at Eurocharged. Not bad for 10days from running with a supercharger to running with a turbo...

my $.02

 

Superchargers and turbos make boost, it takes the same power to compress the air into the motor. THe efficiency of the given 'booster' makes the bigger difference as that determines the usable gain seen at the rear wheels.

I bought the SRT to get the supercharger as I autocross and knew that the turbo car I had with 300 hp did not get off the corner and autocrossing is all corners. I even designed and built a stored air charge system to spool up the turbo and kill the lag turbos have when changing engine speed occures. I mean there is lots of inerta at 110,000 RPM.

Turbos big gain is the utilization of the lost thermal energy in the exhaust system. THat is in part what powers the impeller and gives the higher overall efficiency in the SYSTEM ( input to output). You can get great power if you keep all the variables in check. This is historical fact, so the debate is over classically if not factually. Dragsters use the blowers to get going, cause most of the ET is taken up in the first couple of seconds to get the speed up. You can go 350 mph but the start is time lost and that area is the part most effort goes into, clutches and wrinkle walls and stuff.

I feel that I have a lot to go in the power department as the Eurocharge 181 crank pulley is giving me 25 PSIG, I just need to get the durn thing dynoed and there few OPEN shops around here for the testing, but Ill get there soon.

Enjoy life, Woody
1988 Dodge daytona shelby II 5 speed FWD with a super 60 turbo @ 18 PSIG, and storage system, Woody

 

I agree, Not bad at all for 10 days.

 

Rodimus

Look I'm sorry you haven't heard the saying, "You couldn't be anymore wrong." I left out the "You" because I was indeed replying to you. Here, maybe this will break it down for you, there is no level of wrongness beyond your claim. How's that? If you didn't like my answer to that question just move on...

 

I stayed out of this thread for a reason, now reading it I know why.
This thread makes my head hurt.

 

So by my interpretation of your statement, you think that a turbo is just as parasitic as a blower? If so this is one statement that I'm afraid you are incorrect sir.

Let's face it, dragsters & funny cars use blowers because that's what the NHRA rule book says.

 

Actually, the rulebook only dictates what superchargers can be used and what can be done to said superchargers. With the amount of air and fuel going through those motors in the few seconds after launch, to get a turbo to flow those numbers, it would need to be enormous and have zero lag. Somethings are better turbo'd, somethings are better supercharged... the jury is still out on our car.

 

LMAO, I know, I know, but I love it

I am simply standing by waiting for the lowly NA application

It was very impressive to see forsthand and seeing / hearing it run from a rolling stop - flippin' awesome.

 

It also says that turbos are in fact illegal Which is my point since the NHRA somehow keeps getting brought up, Montana is that you? If they allowed them, who knows what the records would be like...

 

Parasitic??
Superchargers get all their power from - off - the crank.

Turbos get their power from the exhaust, some of that power is lost in any event, so the power to drive them results in a greater crank power (less lost in the motor) or therefore output - shaft horse power.
Woody

 

I am not trying to start anything here or hijack a busy thread, but the civics that I have seen in the 11's and 12's are not running much of anything stock, forged blocks and high strength internals....

I am simply saying, you can not say "well a civic is doing it, so an SRT can" becuase you don't know what is under the hood or inside the block....

 

The rules dont say that turbos can not be used:


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Wednesday, January 30, 2008




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