missing at 5000 rpm

stng87 · 02-25-2001, 02:38 AM

So what is the cause of this? I never really push it to 5000 rpm too often, but Id like to know that I could if I ever wanted to without any problems. Stock cam, 1.7rollers, gt40p's,adj fpr. The following are all new.

plugs
wires
ign module
distributor
cap
rotor
coil

any suggestions? It isnt really a big problem since I usually stay below 5g's but still dont like it.

QuantumMotorsports · 02-25-2001, 10:33 AM

What ignition module to you have? What tach are you using? If it's stock tach, the 5000 you're seeing may actually be anywhere from 4800 to like 6400. I've seen stock tachs that are that far off. If your tach happens to be off and your ignition mod has a rev limiter, there you have it. I'd get an aftermarket tach to check and see how accurate the stock tach is and if it's still missing at 5000 check to see if the ign mod has a rev limiter. Sometimes you can change where they're set.

------------------
Michael Black
Quantum Motorsports
Norman, Oklahoma

1988 Merc Cougar 5.0 HO, P&Ped heads, 2.25" custom mandrel bent dual pipes, T5 five speed tranny
15.43 @ 91.08mph (not shabby for a 3600 pound car)
60' 2.453 Street tires suck!!!

02-25-2001, 02:38 AM	#1
stng87 Registered Member Join Date: Sep 2000 Location: southern california Posts: 329	missing at 5000 rpm So what is the cause of this? I never really push it to 5000 rpm too often, but Id like to know that I could if I ever wanted to without any problems. Stock cam, 1.7rollers, gt40p's,adj fpr. The following are all new. plugs wires ign module distributor cap rotor coil any suggestions? It isnt really a big problem since I usually stay below 5g's but still dont like it.

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02-25-2001, 10:33 AM	#2
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	What ignition module to you have? What tach are you using? If it's stock tach, the 5000 you're seeing may actually be anywhere from 4800 to like 6400. I've seen stock tachs that are that far off. If your tach happens to be off and your ignition mod has a rev limiter, there you have it. I'd get an aftermarket tach to check and see how accurate the stock tach is and if it's still missing at 5000 check to see if the ign mod has a rev limiter. Sometimes you can change where they're set. ------------------ Michael Black Quantum Motorsports Norman, Oklahoma 1988 Merc Cougar 5.0 HO, P&Ped heads, 2.25" custom mandrel bent dual pipes, T5 five speed tranny 15.43 @ 91.08mph (not shabby for a 3600 pound car) 60' 2.453 Street tires suck!!!