which one of the 2 cams should i get?
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which one of the 2 cams should i get? custom grind 231/239 .617/.623 @ 112 LSA or keep my current cam which is an off the shelf comp cam 285LR-HR13 (235/243 .621/.624 @ 113LSA). The custom grind was meant for another setup but the guy wants my cam and wants to do a trade.
89 fox body. EFI 2003 5.3 with 2001 silverado PCM, stock 706 heads, PRC dual .650 springs, 7.4 chromoly pushrods, comp cam 285LR-HR13 (235/243 .621/.624 @ 113LSA), 36# injectors, walbro 255, fuel reg. set to 60psi, 4l60e built with red clutches, "beast" sunshell, larger belt, corvette servo, hd2 shift kit, circle d single disk 2500-2800 stall (does NOT stall past 1650rpm), stock trac-loc 8.8 rear with 3.55s, 27x8 hoosier slicks (beat to hell). thru the floor subframes, boxed stock control arms, stock suspension.
89 fox body. EFI 2003 5.3 with 2001 silverado PCM, stock 706 heads, PRC dual .650 springs, 7.4 chromoly pushrods, comp cam 285LR-HR13 (235/243 .621/.624 @ 113LSA), 36# injectors, walbro 255, fuel reg. set to 60psi, 4l60e built with red clutches, "beast" sunshell, larger belt, corvette servo, hd2 shift kit, circle d single disk 2500-2800 stall (does NOT stall past 1650rpm), stock trac-loc 8.8 rear with 3.55s, 27x8 hoosier slicks (beat to hell). thru the floor subframes, boxed stock control arms, stock suspension.
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On The Tree
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That thing needs to be tuned very, very, badly. It's taking a **** on launch which means you're getting tip-in knock retard and/or not enough fuel from PE. I would expect your MPH to be a fair bit higher than that too! Also, the smaller cam will work better with your 5.3.
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With your stall speed being as tight as it is the cam will need to make good torque on the bottom end and mid-range where it will fall back on the shift extension.
The car being light helps, but the stall and gears demands a camshaft that delivers strong torque production at lower engine speeds.
Here is what I'd recommend:
221/228 .609/.571 111+3
I have a ton of customers with 2800-3200 lb. 5.3 swapped 5.0 mustangs. I have 3-4 camshafts that perform exceptionally well and none of them are over 229@.050" intake lobe.
I've re-cammed so many over cammed 5.3's it's not funny. Had a guy go from mid 11's with a 150 shot to 10.80's with a cam swap in a 5.3 swapped G-body. Old cam was 244/248 112+4. New cam was mid 220's intake duration low 230's exhaust duration.
The car being light helps, but the stall and gears demands a camshaft that delivers strong torque production at lower engine speeds.
Here is what I'd recommend:
221/228 .609/.571 111+3
I have a ton of customers with 2800-3200 lb. 5.3 swapped 5.0 mustangs. I have 3-4 camshafts that perform exceptionally well and none of them are over 229@.050" intake lobe.
I've re-cammed so many over cammed 5.3's it's not funny. Had a guy go from mid 11's with a 150 shot to 10.80's with a cam swap in a 5.3 swapped G-body. Old cam was 244/248 112+4. New cam was mid 220's intake duration low 230's exhaust duration.
Last edited by Sales@Tick; Aug 8, 2014 at 10:59 AM.
Thread Starter
On The Tree
Joined: Jan 2013
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With your stall speed being as tight as it is the cam will need to make good torque on the bottom end and mid-range where it will fall back on the shift extension.
The car being light helps, but the stall and gears demands a camshaft that delivers strong torque production at lower engine speeds.
Here is what I'd recommend:
221/228 .609/.571 111+3
I have a ton of customers with 2800-3200 lb. 5.3 swapped 5.0 mustangs. I have 3-4 camshafts that perform exceptionally well and none of them are over 229@.050" intake lobe.
@Martin. Out of 3-4 cams that you have, which one performs the best? By the way, I will be porting the stock 706 heads over the next few days.
I've re-cammed so many over cammed 5.3's it's not funny. Had a guy go from mid 11's with a 150 shot to 10.80's with a cam swap in a 5.3 swapped G-body. Old cam was 244/248 112+4. New cam was mid 220's intake duration low 230's exhaust duration.
The car being light helps, but the stall and gears demands a camshaft that delivers strong torque production at lower engine speeds.
Here is what I'd recommend:
221/228 .609/.571 111+3
I have a ton of customers with 2800-3200 lb. 5.3 swapped 5.0 mustangs. I have 3-4 camshafts that perform exceptionally well and none of them are over 229@.050" intake lobe.
@Martin. Out of 3-4 cams that you have, which one performs the best? By the way, I will be porting the stock 706 heads over the next few days.
I've re-cammed so many over cammed 5.3's it's not funny. Had a guy go from mid 11's with a 150 shot to 10.80's with a cam swap in a 5.3 swapped G-body. Old cam was 244/248 112+4. New cam was mid 220's intake duration low 230's exhaust duration.
Last edited by Joe Lluvia Avila; Aug 8, 2014 at 02:33 PM.
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I'd wait on the stall change until you get the cam recommended. When you make more torque your stall speed will change to a higher rpm range. Are you thinking the 1650 rpm is the rpm the converter flashes(stall) or is that your foot brake rpm? Because those are two totally different things.
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Last edited by lsxRanger94; Aug 8, 2014 at 02:50 PM.
Cam would be 225/232 .612/.575 112+3.
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Since you are moving away from this being a daily driver with a little big cam and a new 4000 converter, 4:10 gears always worked well in a fox body with an aod and cam. So it would probably be the same outcome. 4:30 gears if you are only going to using it for occasional street duty. For a daily driver, Id have Martin cook you up a slightly smaller cam and keep the setup you have. It will most likely be just as fast and a whole lot more fun to drive everyday. If you need to go faster at the track there is always a 150 shot.