84TransAm

I'm looking at a pulley that goes in front of the harmonic balancer that is supposed to "turn 25% slower than stock and provide about 15 extra horsepower, which will give me better mileage and increased accessory life"--According to Summit.
Does this sound right or is it total BS? I'm not looking to put any hard parts on right now, the engine has a good intake and exhaust. I'm just looking at this for something extra before i plunge into something larger like heads/camshaft.


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--Steve S--
1984 Trans Am 305 LG4, 5 speed Daily Driver, Flowmaster 80 Series
Holley 600 cfm & vacuum advance
350 ready to get in and run as soon as i find a WC T5.

wataru

i had some on mine and ended up taking them off because it really f***ed with the charging and caused the idle to be really bad. oh and i didnt notice a difference with them on either.

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'89 firebird formula tpi
custom cold air,gutted maf(just screens),52mm tb,ported plenum,edelbrock runners and base,headers with 3" catback,tb coolant bypass,afpr@44 psi,msd 6a w\blasterII coil,3.73 posi,sf connectors and corvette servo

DartByU

I have a March crankshaft pulley on mine, but I didn't put the bigger alternator pulley on it so it keeps charge very well, It does help the engine rev. faster and it seems to get a little better mileage. I have never had any charging problems with it, but it did almost overheat one time when I was on vacation and drove it fast up Pike's Peak, it didn't turn the waterpump fast enough to keep the engine cool at VERY high altitude(12,000 to 14,000 ft.)

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92 Camaro RS 5.0 5-Speed (Quasar Blue)
T-Tops
14" Open Air Cleaner
3.08 Posi-trac
Edelbrock TBI Intake
Crane cam
Ported & polished stock heads 3 angle valve job
HyperTech Chip
SLP Headers (Ceramic Coated)
UltraFlo cat-back exhaust

74 Dodge Dart Sport 360 (11.2 1/4 mile)

2000 Dodge 1500 Ram Sport

Tim Hunsinger

I've got a SLP 25% reduction pulley on mine with all other pulleys stock and it works fine. Performance wise I can't tell because I made some other mods at the same time. But the charging system is good, and it does not overheat.

84TransAm

Anybody using this with a V-belt system instead of a Surpentine belt system?

CamaroMike

YEP!

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84 Camaro ZZ4 with HOT cam. Ported Heads, Installed Larger Race-Flo Valves, RPM Air Gap Intake, and 1 3/4" SLP Headers (Best 60',Quarter Mile, MPH) (1.88, 12.91, 106.77)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

wataru

the reason i think i had probs with the charging system is because i but the alternator pully on to. But i might try just the crank pully now. Since uyou guys dont seem to have a prob.
Later Barrett

camaroguy99

check out march's power and amp series a little more expensive, but they say it retains near stock charging capacity.

Biochem

I have a 25% crank pulley and did notice a butt-o-meter difference I think. I have slight charging problems, but who idles or runs below 1200 rpms for very long anyways. I usually cruise around 2000, so it is fine at that rpm. I do have a cooling problem and that really irritates me.

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...

-=ICON Motorsports=-