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08-19-2004, 07:14 PM | #1 |
Registered Member
Join Date: Mar 2004
Location: Long Island
Posts: 58
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What The Hell Happened !
ok after about 5 hours i got finaly got my AFR 185's on, went for the test drive.... i STAND ON IT !!! and WTF ! maybe feels alil quicker then my GT40p's but not 1300 dollars faster !! im very upset...
im running 14 degrees timing, about 37 psi through regulator new plugs gapped at 40. are these heads to big for my 308 ? is my intake mainfold not flowing enuff air down into the intake valves ? PLEASE HELP! I SPENT WAAAY TO MUCH MONEY FOR THESE CRUDDY RESULTS. THANKS GUYS.
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1990 Mustang GT Engine- 308 (bored .40 over) Probe Forged pistons (10.5:1), Scat forged crank and rods, w/Main Girdle, AFR 185 heads, GT-40 intake, CSI electric water pump. AC delete kit, No smog pump, Manual rack and pinion steering. Ignition- MSD 6AL, MSD Blaster coil, MSD hellicore wires. Drive Train- Tremic 3550, Alum. Drive shaft, 3:73 gears, Stock carrier and axels. 26X11.5 M/T Et streets. Power adder- 175 shot of laughing gas. Best ET 11.5 @120mph on squeeze, 12.4 @109mph on muscle (on gt40 heads) on the 185 heads ... ??? tba |
08-19-2004, 07:46 PM | #2 |
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Join Date: Aug 2002
Location: Rochester
Posts: 553
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Isnt .040 on the plugs a bit small, and 37 on the regulator seems a bit low, 45psi at least, what injectors do u have? give us more specs.
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08-19-2004, 09:22 PM | #3 |
Factoy Five Roadster
Join Date: May 2000
Location: Sevier Co,Tennessee
Posts: 1,681
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Cam?
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Frank |
08-19-2004, 10:22 PM | #4 |
Registered Member
Join Date: Mar 2004
Location: Long Island
Posts: 58
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i have an iski cam, i dont have the specs on it, the cam was in the car car went i bought it a year ago.
i run .040 on the plugs cause i spray it. and if the gaps not that close the juice puts out the spark. im running 24 pound injectors. and i would think 37 psi on the regulator is more then enuff w/ 24 lbs injectors ? what do u guys think ?
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1990 Mustang GT Engine- 308 (bored .40 over) Probe Forged pistons (10.5:1), Scat forged crank and rods, w/Main Girdle, AFR 185 heads, GT-40 intake, CSI electric water pump. AC delete kit, No smog pump, Manual rack and pinion steering. Ignition- MSD 6AL, MSD Blaster coil, MSD hellicore wires. Drive Train- Tremic 3550, Alum. Drive shaft, 3:73 gears, Stock carrier and axels. 26X11.5 M/T Et streets. Power adder- 175 shot of laughing gas. Best ET 11.5 @120mph on squeeze, 12.4 @109mph on muscle (on gt40 heads) on the 185 heads ... ??? tba |
08-19-2004, 10:23 PM | #5 |
Registered Member
Join Date: Aug 2002
Location: Rochester
Posts: 553
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bring that PSI up to minimum of 45lbs.. raise it and see how she drives.
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08-19-2004, 10:24 PM | #6 |
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Join Date: Aug 2002
Location: Rochester
Posts: 553
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37lbs is the stock setting at WOT, so on a modified car you need to step it up a bit.
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08-19-2004, 11:20 PM | #7 |
Moderator
Join Date: Sep 1998
Location: Grand Rapids, Michigan, USA
Posts: 1,001
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185's are a bit much, IMHO, on a 308 unless you really get it up there in the RPM range, say 3500-7000. I didn't notice which intake/tb/MAF setup you have, but I'd say you need something along the lines of a Victor Jr/ Trick Flow breadbox to really need 185's. How much compression are you getting? Check it with a gauge just to be sure it's spot-on. One vital thing you NEED to find out are the spec's on that cam. The cam will have more effect than any other component in or on the engine, regarding its "attitude."
Coincidentally, I have a friend who ran World Castings' Windsor Sr. heads on a 302 (similar in essence to what you have). Granted he had not-so-great compression, but I still beat him with a mostly-stock '87 Notchback with ~150k miles. A friend of his bought the car and basically shifted at the rev limiter, and he got it to drop a full SECOND in the ¼-mile. The moral is that on these high-flowing heads, you either have to have a LOT of cubes or a LOT of revs.
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Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco |
08-20-2004, 03:57 PM | #8 |
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Location: Staging lane
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Your fuel pressure is fine I run 38 psi with 24# injectors are my heads are as big as yours.
38 psi with 24# injectors will easily support 400rwhp. I also have big heads on a 302 and I lost alot of low end but it screams in the upper rpm's. Your results are normal.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
08-20-2004, 07:35 PM | #9 |
Rat Killer
Join Date: Aug 2002
Location: Cold ass Ohio
Posts: 1,143
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Sounds to me like you need to wind her out a bit more, and let those heads do their thing. I think this is sorta where Capri306 was heading. Your shift points are gonna be all wrong with the new huge X large ports on the AFR's
On a side note, being a "bottle sniffer" myself, I would be willing to bet a weeks pay that if you spay it, you will be HUGELY happy! For example, let's say at your current N20 settings, you can knock of .7 seconds on your quarter mile time. With the new heads, I'd bet big money that same setting will net you better than 1.00!! Make sure she's RIGHT, make sure she's HAPPY. THEN go spray it, and let us know!
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d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply..... |
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