Wasn't sure, but I thought so. I thought someone here was trying to substantiate the fact that GT28's outflow 18G's. I dont think it matters what type of fuel used? Power is power? If you can flow the air...efficiently... Seems aweful close?

 

This was stock bottom end and rwd. The other plots TTboost and I posted were on a mustang dyno, 28rs and awd.

Bottom line, 28rs's that aren't held back by a k16 hot side (which highhats were), will make alot of power.

 

fuel makes a GREAT difference when making power

pump fuel will see anywhere from 9.5 to 10 hp per lb/air where as the real nasty stuff like VP import and E85 can see as much as 12hp per lb/air or more

say a system is flowing 66lb/min with pump fuel, figure you are getting 10hp per lb of air so a 66lb/min car is pumping out 660hp

now take that same car, on VP import: 66lb/min * 12 = 792hp!!

 

Interesting facts posting up here guys! I'm in the process of adding a pair of GT28rs's to my S4.

 

Yeah, you're talking about a compressor map. I agree....

 

published compressor maps you really have to research, some get cut off early say at 126,000 RPM as opposed to 144,000 RPM, so what is actually on the map may not be the full potential of the turbo

 

Gt 28's making as much power as my GT 30's....that must be a special dyno. What are the 60-130's? I am sold that the 28's are as good as the 24/18's, but 685?

 

what kind of boost levels are you running on your 30's?

 

I made 670 but it was a mix of pump and Sunoco 114...I went up to 1.4, spiked at 1.5 for a half second. I am going to get a good boost guage pretty soon.

On C 16 I could probably make more. Also, there were no fans on the car. Dyno was pretty stingy. There is another dyno in town where I could make 700 easy, but I only care about 60-130's.

I also have dual pumps, rails and 60lb injectors.

 

if you went up to 2.0 or 2.1 bar on full C16 your hair would really get blown back
granted, the engine would have to be able to take it

do you have the 3071's or 3076's?

 

60lb injectors are pretty small for that kinda power. Have you through about stepping up for safety?

 

That is not a bad idea, Tony....which should I run?

Tial: I have GT 3076 A/R 63

 

All our cars have been running a 72lb or 95lb Bosch injector.

Its one of the best injectors I have ever tested.

Wes from Titan can get you a set. They arent cheap, but they're worth it. Thats what we're running in Audikp's 3071 car.

 

Well sort of...people were seemingly trying to compare 18G's and GT28's with no talk of boost levels, fuels, supporting mods, etc... ALL that does make a difference. I would like to see both turbos at the same boost on the same fuel for a real comparison...

 

There is no need for larger injectors at his power level . you keep on preaching this over and over again ... just beacuse you cant do it does not mean others cant ...
hows 914.4 rwhp and 809 wheel torque on 60 lb injectors ?? Oh and the purple line was on 100 octane !!!!it made 834 rwhp at only 1.34 bar.. so um ya...