What The Hell Happened !

leathal injection · 08-19-2004, 07:14 PM

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.

88fivepointoh · 08-19-2004, 07:46 PM

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.

mustangII460 · 08-19-2004, 09:22 PM

leathal injection · 08-19-2004, 10:22 PM

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 ?

88fivepointoh · 08-19-2004, 10:23 PM

bring that PSI up to minimum of 45lbs.. raise it and see how she drives.

88fivepointoh · 08-19-2004, 10:24 PM

37lbs is the stock setting at WOT, so on a modified car you need to step it up a bit.

Capri306 · 08-19-2004, 11:20 PM

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.

Dark_5.0 · 08-20-2004, 03:57 PM

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.

~The Jester~ · 08-20-2004, 07:35 PM

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!

08-19-2004, 07:14 PM	#1
leathal injection Registered Member Join Date: Mar 2004 Location: Long Island Posts: 58	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. __________________ 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, 09:22 PM	#3
mustangII460 Factoy Five Roadster Join Date: May 2000 Location: Sevier Co,Tennessee Posts: 1,681	Cam? __________________ Frank

08-19-2004, 10:22 PM	#4
leathal injection Registered Member Join Date: Mar 2004 Location: Long Island Posts: 58	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 ? __________________ 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, 11:20 PM	#7
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	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. __________________ 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
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	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. __________________ 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

08-19-2004, 07:46 PM	#2
88fivepointoh Registered Member Join Date: Aug 2002 Location: Rochester Posts: 553	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.

08-19-2004, 10:23 PM	#5
88fivepointoh Registered Member Join Date: Aug 2002 Location: Rochester Posts: 553	bring that PSI up to minimum of 45lbs.. raise it and see how she drives.

08-19-2004, 10:24 PM	#6
88fivepointoh Registered Member Join Date: Aug 2002 Location: Rochester Posts: 553	37lbs is the stock setting at WOT, so on a modified car you need to step it up a bit.

08-20-2004, 07:35 PM	#9
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	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! __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

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