I read your link and have more question then answers. I am having a really hard time with your 1400 number. The trans alone is not even close to able to handle that let alone the 700 you are putting though it now. The gear ratios suck in that box for a turbo engine. Also those gears are pressed on the shaft no splines. Clutch?? Who makes one for the platform that can handle 800whp let alone 1400. I know the car stripped out like it is is around what 2000-2200lbs? so that helps the clutch and gear box live. Your 1000cc injectors are what about 85% @ 43psi now? or 80%@ 60 base? I will stop here.

are 1000cc injectors enough to supply 1400 whp?

Tim, Aasco/Tilton have a twin disc in your choice of metalic or carbon/carbon that will handle 700whp. Its not on there website but I have called and spoken to them about it. The carbon/carbon sucks
because is life is only 3000miles if i recall. I am planning on using there
twin metalic 7.25" but they do offer a 5.5" as well.

I can not see the 1000cc injectors supporting 1400hp ever
but I belive he may have been saying that the block/sleeves will handle the 1400hp. I personaly was planning on using the 1100FIC injectors with a goal of 550-600whp but I'm limited to my turbo setup unless you feel like like visiting TX for a while with your welder

I never knew that our 996na gearboxes only had the gears pressed on w/ out splines. thats sucks!!!

Not even close. At 88% duty on E85 they are enough for 720whp. On C16 will probably be good for 1000whp

mark , i didnt think they would , hence why i asked to be sure... hmm... oh well. maybe the had larger injectors at the time ? who knows...

Their dynopack only goes to 1100hp.

Quote:

Originally Posted by Tim941NYC

I read your link and have more question then answers. I am having a really hard time with your 1400 number. The trans alone is not even close to able to handle that let alone the 700 you are putting though it now. The gear ratios suck in that box for a turbo engine. Also those gears are pressed on the shaft no splines. Clutch?? Who makes one for the platform that can handle 800whp let alone 1400. I know the car stripped out like it is is around what 2000-2200lbs? so that helps the clutch and gear box live. Your 1000cc injectors are what about 85% @ 43psi now? or 80%@ 60 base? I will stop here.

I am more than happy to oblige:
I am using a 997 gearbox, on my blue 911, and have had much success to date. I am also not very gentle on my projects, and the gearbox is holding up like a champ! My tuning protocol may help, as I use an electronic boost solenoid by AEM, and take advantage of the engine management system's "boost per speed" function: it allows me to run lower boost levels at low speeds, and ramp up the pressure, as MPHs increase. The advantages of ideal traction coupled with ease on drivetrain parts are appealing.

The torque multiplication in the n/a gearbox is very appealing to me, especially when it comes to the “fun factor”.

I run a custom semi-metallic matrix 6 puck disc with a heat treated, and modified diaphragm fulcrum pressure plate. I try to avoid commercially available twin discs, if I can, due to its noise and frequent maintenance. Only in my most powerful of race cars to I opt for one...when I have extinguished all possibilities.

I have vast experience with injectors, and the myriad of advantages of higher fuel pressures. A good example is on one of my inline 4 race engines: I run a set of Bosch EV1 620cc injectors, on methanol, at 130psi, base, with numbers approaching 500hp. The improved atomization, coupled with ideal idle quality makes it a win-win. This same experience is used in many of my builds: smaller injectors with higher base pressures, for the aforementioned benefits. To answer your question, I am yet to approach the 70% duty cycle region, at this time. Thanks, and I hope that helps.

Quote:

Originally Posted by unvmy996

are 1000cc injectors enough to supply 1400 whp?

Yes, with the right base pressures, it can. As long as your injector coils can handle the high pressures. Thanks.

Quote:

Originally Posted by prodigymb

Not even close. At 88% duty on E85 they are enough for 720whp. On C16 will probably be good for 1000whp

As shared above, you may be surprised. Six 1000cc injectors can, on petrol. Thanks.

Quote:

Originally Posted by Tim941NYC

Their dynopack only goes to 1100hp.

That is correct. I rarely get clients that make more than that...for now. Thanks.

I am more thank happy to share my experiences: past, and as I explore more. I love going fast, and I get really excited about science, and experimentation. Thank you, all, for the nice discussion.

@bisimoto, what does it rev out to?

My limiter is set to 8800RPMs, and power only drops slightly post 8200. The n/a 996 heads have very nice intake ports. Thanks.

8800rpm ???

I thought 7500 was high...

That is some insanely high base fuel pressure there. IMO, a bomb waiting to go. But then not my car so no worries here

Tim how's the conditions down in your neck of the woods right now with the storm cleanup? I was planning to shoot down to see your car again and to hand you back your cable in person, but if it's still a mess and a hassle for fuel I'd rather just wait it out for the time being and ship your cable back to you insured.

+1
Agreed

Those pressures are not high at all, to the contrary. Teams with much more resources that you and I (F1) take advantage of even higher pressures due to the atomization and power benefits.

OEs (including Porsche) now use direct injection (fuel pressures of 1200psi+), with pumps, lines and modern injectors for economy, power, and efficiency.

Maybe I am too much of a geek, who loves and builds fast cars, experiments, and bases info on facts and data...opposed to assumptions. I do not build "bombs", I build fast, reliable cars...while thinking out of the box. Thanks.

Hold up...Those psi's are high for any non direct injector as a base, then add your 1-1 fpr. You can get away with a lot on a 1200lb N/A motor with little load on it.. Is that why you like the short gears of the N/A tranny? You are using a Holley fuel pump they dont even rate them passed 60psi.. And at the 60psi their biggest pump flows 140gph. hmm. I will not get into math with you and a lot of thing "work" as long as you dont use them. F1 and direct injectors do not run on 12 volt.. Two different animals..

One hiccup and you have a toasted engine..