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I have finished the install on my FR500 HCI 99 Cobra. Includes new springs and SFI Balancer. Engine acutally quieter than stock hydraulic lifters (adjusters) (so far). Exhaust is noticibaly louder (more crackle and snap). Put 250 miles on it; then Dyno Test. Initial Dyno; no re-tune; I...

Started the project this weekend to replace FR500 springs with special double helix; and to install solid lifters with double rollers. I should gain 30-40 RWHP at 8,000 RPM. (440-450 RWHP) fo the FR500 Cobra 4.6. Remember I have Oliver I-Beam Rods and a 9 Quart Canton Oil pan with a custom...

From 2006;

I know it is 0-60 is NO real test (but interesting though); but these are real clocked 0-60 times from Sunday. (modified N/A) I was really surprised. 99 FR500 Cobra -- 4.588 4.30's 04 Mach1 4.913 -- 4.10's 06 GT 5.022 -- 3.73's

Warm engine. NA. FR500 Cams at 900-925 RPM's. At 800 RPM's the lope is too much for me. I have had several request for this. Turn your speakers up a little; the recording is weak and of poor quality. FR500 Heads (heavily ported) - Intake Flowbench = 302 CFM. Bassani Mids, Prochamber with Cats...

Ran flawlessly, even in 95* + temp -- ran cool. Averaged 304 miles per tank with 4:30's. Went 1,400 miles. Installed the engine 18 months ago. No problems yet; 7200 miles. BTW, Have T56 Viper Spec; (.5 6th gear)

Found it an antique store for 50 cents Friday night. Quadcammer ?

Assorted pics: BTW: Cobra revs freely to 8,000 RPM. I take it to 7500 RPM every day; 7600 + is considered dangerous without a higher quality balancer and large springs.

FR500 Cobra one year later -- Few pics added Last April 1, 2006, I finished the FR500 conversion of my 99 Cobra. I have been driving it a lot this first year (409 RWHP; 380 RWTQ) and I can't say enough about the drivablility and reliability. FR500 Heads Ported and Polished to Stage 2-3...

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...

Since in have 99 Cobra, and have long since pulled the CD player; I installed 3 gauges in that empty location. I still am using the Hurst shifter instead the MGW for a trial. Comments ?

For those interested in FR500 motor Heads, Cams, Intake, (Stock 03 Cobra Tank and pumps, 39# inj, 90mm LMAF); Fuel mileage (3.73s): 1st Tank -- 178 Miles (Dyno Tunes) 2nd Tank -- 210 Miles (Dyno Tunes) 3rd Tank -- 165 Miles (several easy 1/4 mile runs and Dyno Tunes) 4th Tank -- 277 Miles...

I gotta make a change. Came close to a deer tonight that I should have seen !! I have searched and not found agreement on bulbs. I don't want anything that will delete my high beams AND just need more candle-power. What is best ?

What a positive difference (with a Viper spec T56) for a high RPM engine. Glad it did it (3.73's to 4.30's).

I put in the Hurst T56 shifter (which was given to me), this morning and replaced my beloved MGW shifter; basically just to try it out. But; I have got to tell you it is NOT BAD. It has only slightly longer throws than either the MGW or TriAX (which I have used for 3+ years). It is crisp; not...

I have used the search function and read for an hour. So much difference of opinion on this one. I guess the real crucial time is the first 40-100 miles but 1500 also seems to be a milestone. I have 2400 miles on the new built Cobra Engine. Is it time to go synthetic ? Best Synthetic. I have...

For those who have asked, I tried to record the the exhaust from about 8-10 feet behind the rear bumper this afternoon. To cut down on filesize I deleted the video portion (which have found out is required at Google). Posting of an audio/video is new to me. Idle is 900-910 RPM. Remember, this...

Potentially Dangerous Situation --- Everything started out very well. Good idle, good response, motor comes back to idle (for a month); then out of the clear blue, the last 3 days, which have been cold and wet; the engive revs to 3500 for no apparrant reason each time I drive it for 5-10...

With a Viper Spec T56, (2.66:1 First) I have decided on 4.30's for my car (408 RWHP FR500 everything). It currently has 3.73's. It is not my daily driver.

I have a Viper Spec T56. To get the same gear ratio (jump of the line) as a T45 with 3.27's, I have to install a minimum of 4.10's - 4.30's. Is this valid anyalsis; not counting changes in HP/TQ ??

This is the dual TB FR500C model; "The "Five Liter" Is Back The foundation for the Mustang GT-R's race-prepared 440-horsepower engine is the new 5.0-liter "Cammer" crate engine from Ford Racing Performance Parts. The engine is rooted in the MOD 4.6-liter four-valve V-8 engine family...

Teksid Block with LDC cooling mod; Canton 8 QT Oil Pan; new Fluidyne radiator, Mildly ported and polished FR500 heads; FR500 Valvetrain, FR500 Intake, FR500 CB, JLT and 90mm LMAF, Mezziere Water Pump, MSD Stacker 8, Accufab Dual 60mm TB. T56 and 3.73's. I now have 2009 miles on this motor and...

Any experience in recent purchases ?

Regarding the FR500 modded NA 4.6 I have been working on (power #'s based on 2 pulls each): Runner control via MSD Window Switch Runner control 0-2500 Short Runners (noise control) Runner control 2501-4700 Long Runners (torque Runner control 4701-7500+ Short Runners (horsepower) Standard...

Has anyone given any thought to the effects of 2 crossovers. For instance, my FR500 setup has a ProChamber "sort of an H" and then a downstream "X". Theoretically, what does this do to flow ? Does it help it or hurt it ? What about straight pipes from the headers to the CB and only a...