That High RPM Rush

[wojowojo16]

Is it the stock tune? If so that can be rectified w/ an aftermarket tune and you may make a little more power! ;-)

Edit: Forget that, I just saw you're ProCharged so I doubt you're on a stock tune! :idea:

nope, not stock at all...got a pretty rich very conservitave tune, put down about 480rwhp.

 

[VirtualSVT]

I shift at 7K when its warmed up.

 

[99svtvert]

The max with no Valve Float on the FR500 springs is o/a 7750RPMs, any higher you start playing with fire and its time to up-grade the springs.

The stock bottom end guys dont try that, the stock spring is good to o/a 72-7300RPMs with the stock cams but the rod bolts may not like that and the stock oil pump will hate it.

Billet Oil Pump Gears = Must
Up-graded Rods/Bolts = Must
Billet Timing Gear = Should
Quality Harmonic Balancer = Must

Some high rev 4vs? Check out the Modular Performance, Al-P, and VT race cars! They rock to 9000+!!!!

Here is a video of mine to o/a 7500RPMs shifts.

http://www.mightymustangs.net/~nazman/Naz's%2099%20at%20SAR.wmv

Naz

I have billet pump gears, billet timing gear; ARP rod bolts, and ATI 4.6 Superdamper (an expensive add-on).

The 305 Modular that I am working on; has a solid roller valvetrain and double helix springs, stage 3 ported FR500 heads, and did have a FR500 intake (that has been moved to the 4.6) so it is intake-less right now. It easily turned 8250 early last spring.

That is a unbelievable roar.

As far as blown 4.6's, I don't think it makes any difference how the the RPM's go (6500-6800) after you stop making HP ????

 

[Nazman]

I have billet pump gears, billet timing gear; ARP rod bolts, and ATI 4.6 Superdamper (an expensive add-on).

Not to hijack but here are some supporting pieces to support some higher RPMs. Not to mention Springs, and High-Flow Intake manifold.

ARP 2000 Rod Bolts/Manely H-Beams

Windage Tray & High Cap Baffled Pan is a nice to have to suppport higher RPM

ATI Super Dampener & ARP Crankshaft & Cam Bolts

Lighten (SP?) Pressure Plate (soon to be replaced by an Aluminum PP) & AL Flywheel w/ARP Bolts

Billet Timing Wheel & Billet Oil Pump Gears w/Blueprinted HV Oil Pump

Naz

 

[99svtvert]

Not a hijack - good info for all; we ended up with pretty much the same stuff. BTW; Great pics.

 

[na svt]

I've been up to 7800 a couple times and it sure sounds sweet up there.

 

[UCBeau]

curious as to that dampener..good or bad idea w/ a blower car?

 

[Nazman]

curious as to that dampener..good or bad idea w/ a blower car?

ATI Super Dampener makes one for SC applications. Check out thier site.

Naz

 

[UCBeau]

sweet thanks Naz

 

[Joe Lynch]

If I remember right, Joe Lynch was turning his 8500. He didnt even have an fr500 intake, just a cut stocker.

I have the rev limiter at 8200 rpm but routinely run it to 8000 rpm on a 175 shot. It has the SHM valve springs and valves, however, and some Houston Performance regrind cams. That's the only good valve gear that was available 3 years ago. And its a 20 over stock stroke motor. Lots of good stuff for us now.

The stock crank trigger and electronics is only good for about 8200 rpm I've heard, but I haven't worried about it, since the power is falling off by 8000 rpm anyway.

Gosh, I love these itty bitty engines.

Joe

 

[99svtvert]

I have the rev limiter at 8200 rpm but routinely run it to 8000 rpm on a 175 shot. It has the SHM valve springs and valves, however, and some Houston Performance regrind cams. That's the only good valve gear that was available 3 years ago. And its a 20 over stock stroke motor. Lots of good stuff for us now.

The stock crank trigger and electronics is only good for about 8200 rpm I've heard, but I haven't worried about it, since the power is falling off by 8000 rpm anyway.

Gosh, I love these itty bitty engines.

Joe

Joe, what intake do you use ? Thanks.

 

[01cobravortech]

Here is a video of mine to o/a 7500RPMs shifts.

http://www.mightymustangs.net/~nazman/Naz's%2099%20at%20SAR.wmv

Naz

Thats funny how the announcer called the car "The Mustang Steeda" :lol:

 

[99svtvert]

Must be the stripe. Fastest Steeda they ever saw !

 

[REX-RACER]

Good info as always guys!

I just want to make a point about this:

Even though Ford doesn't say you need to replace the crank pulley bolt when swapping a set of underderive pulleys, it should be obvious that guys that know what their talkin' about around do it, so that's good enough for me!

Bottom, if you're gonna replace the pulley, replace the bolt! It's a $5 investment to protect your engine!

 

[silver2001cobra]

New dyno on Sunday (2 pulls)
----------------------------------

The FR500 (4.6) Cobra made 2 pulls on Sunday. I wanted to see if the HP has stayed the same or increased a bit ??

I upped the rev-limiter to 7600 and pulled both times right up to 7600. Result; I made 1-2 more HP at 7600 (410 RWHP - DynoJet SAE), than 7250. Torque remains unchanged. It is so hard to imagine that the HP has not peaked with those heads, intake, and valvetrain by 7600.

No sounds of float, knocking, detonation, or anything unusual; just a roar. Aggressive !!!!!

I see Naz has raised his to 7750. I really believe that the combo will pull to 8000.

I am not willing to try that much yet and lowered my limiter to 7400; which, by the way, I hit everyday now. No issues.

hey man what was your dyno numbers before the fr500 intake,i want to compare my numbers to yours before the your intake swap.i think we have the same mods but i put down 356rwhp and 350 rwtq