5.0 Question

SteveK · 04-27-2001, 01:46 AM

I have an 86 GT.

1. The timing pointer is huge. Does everyone have this? Or is it a small pointer? Mine is about 2 inches in width, not counting what looks like an O-ring towards the passenger side. I hope this makes sense.
2. Above 4500rpm, it feels like I hit a wall. I know that 86 has rather restrictive heads, but could my valve springs be collapsing at this speed?

By the way, my engine is completely stock. I believe I set my timing to 12-14degrees, assuming I pointed to the correct timing mark. And it has 104k on it.

Any info would be appreciated.

Thanks

------------------
Steve K.
86 GT

WADS56 · 04-27-2001, 01:57 AM

sorry I can't help, but it always good to see another chicago stang.

------------------
347 W/ A-trim 6#'s, Canfield heads, out of the box Systemax II intake, solid roller cam. 11.1 @123mph

93lx 5.0 daily driver

04-27-2001, 02:14 AM

Yes i have the same style timing pointer as you with the big "O" on the passanger side of the pointer, that's normal. My car also dies near 4500 rpm, that's because of several things like, small stock worn out cam, tiny port heads/intake manifold, worn valve springs, and when my car was stock it had log type exhaust manifolds. Yours probably has the small, crimped headers...but you have the same pre-87 heads as me. I believe your car is a roller cam engined car though. From what i know about '86 fuel injected mustangs vs. '87+ fuel injected stangs is that the '86 stangs had a smaller throttle body, crappy heads with smaller ports than the E7TE heads of later models and i also believe your car has the dual-single-dual exhaust (i might be wrong) which also kills power. Is your car carbureted or fuel injected? I know '85 cars had both... but yeah it is very normal for your car not to want to rev high in stock form because it's designed for emissions and lowend torque rather than high end power.

------------------
'84 Mustang 5.0 T5, FMS aluminum radiator & 180* t-stat, 1 5/8 shortys/2.5" duals, '88 GT tail lights and wheels, Holley 4160 4 BBL, FMS smog pump idler

[This message has been edited by 84stangLX (edited 04-27-2001).]

04-27-2001, 02:19 AM

actually...does your car sputter/stall at 4500 or does it just stop revving?

04-27-2001, 01:46 AM	#1
SteveK Registered Member Join Date: Apr 2001 Location: Round Lake, IL, USA Posts: 51	5.0 Question I have an 86 GT. 1. The timing pointer is huge. Does everyone have this? Or is it a small pointer? Mine is about 2 inches in width, not counting what looks like an O-ring towards the passenger side. I hope this makes sense. 2. Above 4500rpm, it feels like I hit a wall. I know that 86 has rather restrictive heads, but could my valve springs be collapsing at this speed? By the way, my engine is completely stock. I believe I set my timing to 12-14degrees, assuming I pointed to the correct timing mark. And it has 104k on it. Any info would be appreciated. Thanks ------------------ Steve K. 86 GT

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04-27-2001, 01:57 AM	#2
WADS56 gear banger Join Date: Aug 2000 Location: CHICAGO Posts: 1,144	sorry I can't help, but it always good to see another chicago stang. ------------------ 347 W/ A-trim 6#'s, Canfield heads, out of the box Systemax II intake, solid roller cam. 11.1 @123mph 93lx 5.0 daily driver

04-27-2001, 02:14 AM	#3
84stangLX Guest Posts: n/a	Yes i have the same style timing pointer as you with the big "O" on the passanger side of the pointer, that's normal. My car also dies near 4500 rpm, that's because of several things like, small stock worn out cam, tiny port heads/intake manifold, worn valve springs, and when my car was stock it had log type exhaust manifolds. Yours probably has the small, crimped headers...but you have the same pre-87 heads as me. I believe your car is a roller cam engined car though. From what i know about '86 fuel injected mustangs vs. '87+ fuel injected stangs is that the '86 stangs had a smaller throttle body, crappy heads with smaller ports than the E7TE heads of later models and i also believe your car has the dual-single-dual exhaust (i might be wrong) which also kills power. Is your car carbureted or fuel injected? I know '85 cars had both... but yeah it is very normal for your car not to want to rev high in stock form because it's designed for emissions and lowend torque rather than high end power. ------------------ '84 Mustang 5.0 T5, FMS aluminum radiator & 180* t-stat, 1 5/8 shortys/2.5" duals, '88 GT tail lights and wheels, Holley 4160 4 BBL, FMS smog pump idler [This message has been edited by 84stangLX (edited 04-27-2001).]

04-27-2001, 02:19 AM	#4
84stangLX Guest Posts: n/a	actually...does your car sputter/stall at 4500 or does it just stop revving?