heads for HP?

1984 GT · 02-13-2003, 03:34 PM

When my 351W went in my car I kept the Windsor Jr. heads. Yesterday I had it on the dyno for the first time, torque 323, RWHP 277 at 5000 rpm. What heads should I be considering to get my HP up and what would the expected pay off be at the track. Last time out I ran 13.4, 108 mph with a 2.4 60' on street tires. Suggestions?

Murdock · 02-13-2003, 05:24 PM

What is the rest of your mods, from the carb to the tail pipes?

Murdock

88workcar · 02-14-2003, 07:04 AM

First give us the whole package
motor
tranny/stall
rear/ tire
suspention

You are capable of mid 12s with out ever opening the hood, your problem is the 60ft. Those Jrs are not the problem, yes there is better out there, but you don't need that right now.

1984 GT · 02-14-2003, 11:46 AM

Mods: 351, .040 over, World Products Windsor Jr. Heads, Crane Cam and Roller Rockers, Weiand Stealth Intake, Holley 650 Double Pumper, Under Drive Pulleys, FMS Clutch, Ford Motorsports Aluminum Drive Shaft, 8.8 rear with 3.73 Gearing, Mac Shorty Headers and H-Pipe, Flowmaster 2 Chamber Mufflers, K&N Filter

Thanks for any advice.

1984 GT · 02-14-2003, 11:48 AM

oops...transmission T-5, sub frame connectors, removed front sway bar

Ackbar00 · 02-14-2003, 12:20 PM

Something is up. Mine made more power with less parts. Not to mention 50 less cubic in. and a stock cam.

Murdock · 02-14-2003, 12:24 PM

I need the cam specs. What ratio rocker are you running?

Murdock

1984 GT · 02-14-2003, 01:41 PM

It's a Crane 284 energizer

lift: intake: .512 exhaust: .512
adv duration: intake: 284 exhaust: 284

crane roller rocker: 1.60

BilLster · 02-14-2003, 02:33 PM

slicks , 750 dbl pumper, or a little n20 would be cheaper than new heads

what suspention mods do you have ?

cams almost the same as my turbo set up 280 dur .512 lift

so its kinda small for a na 351

Murdock · 02-14-2003, 07:57 PM

The Windsor Jr. heads are a little under sized for a 357. I also think you could use more cam lift and get at least your exhaust duration at 50 up into the 234's. Your at 228 right now. I'm not a huge fan of single pattern cams. You might also look into a long tube header with 1-3/4" primaries. The best head IMO for the lift your running would be the TFS Twisted Wedge, but you would have to get them drilled for the 1/2" head bolts. Second I would choose the AFR 185cc heads. Don't forget to check valve clearance! If you could post your dyno that would help more also.

Thanks
Murdock

88workcar · 02-14-2003, 11:32 PM

A 2.4 60ft, yes lets all add more motor, thats it now a 2.9 60ft should fit the bill. YOUR MOTOR IS NOT THE PROBLEM, GET OFF OF IT AND GET OUT THE HOLE.

Murdock · 02-15-2003, 01:37 AM

Granite he's not getting any traction, but I was looking at his dyno numbers. A 357 should be pulling more than 277 HP and you really don't need to hook up on the dyno roller.

1984 GT, does the car bog at all off the line?

Murdock

1984 GT · 02-15-2003, 06:48 AM

I don't bog off the line. I haven't run on anything but my street tires so far and can't really launch. I just have to ease out of the hole and be pretty conservative shfting into second. I have an extra set of rims and plan on mounting and using ET streets which should help with my traction problems.

I'll try and post my dyno sheets for help later they show a nice clean steady curve up to around 5000 rpm where it tails off.

88workcar · 02-15-2003, 11:34 PM

I will agree, the motor sounds a little shy. What is the chance that the tires were slipping on the dyno? OK stupid question. But really, what is more important the dyno sheet or the time slip? No matter what the dyno sheet tells you, the timeslip says (You need traction) 277hp is what I think I have, But no one at the track knows that, they all think more like 400, ha I wish. Good luck with what ever you decide, The best part is that you are concerned with it.

1984 GT · 02-16-2003, 07:10 AM

Thanks to everyone for the input. I guess the bottom line is ET and not HP so I'll look for a new transmission, I'm running the stock T5 which I don't think will last under the pressure of hooking and launching, and probably run ET Streets.

02-13-2003, 03:34 PM	#1
1984 GT Registered Member Join Date: Mar 2002 Location: Gainesville, Fl Posts: 59	heads for HP? When my 351W went in my car I kept the Windsor Jr. heads. Yesterday I had it on the dyno for the first time, torque 323, RWHP 277 at 5000 rpm. What heads should I be considering to get my HP up and what would the expected pay off be at the track. Last time out I ran 13.4, 108 mph with a 2.4 60' on street tires. Suggestions? __________________ If not now, when?

02-13-2003, 05:24 PM	#2
Murdock Registered Member Join Date: Dec 2002 Location: Columbus, OH Posts: 100	What is the rest of your mods, from the carb to the tail pipes? Murdock __________________ LARZRACECARS larzracecars.com

02-14-2003, 07:04 AM	#3
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	First give us the whole package motor tranny/stall rear/ tire suspention You are capable of mid 12s with out ever opening the hood, your problem is the 60ft. Those Jrs are not the problem, yes there is better out there, but you don't need that right now. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

02-14-2003, 11:46 AM	#4
1984 GT Registered Member Join Date: Mar 2002 Location: Gainesville, Fl Posts: 59	Mods: 351, .040 over, World Products Windsor Jr. Heads, Crane Cam and Roller Rockers, Weiand Stealth Intake, Holley 650 Double Pumper, Under Drive Pulleys, FMS Clutch, Ford Motorsports Aluminum Drive Shaft, 8.8 rear with 3.73 Gearing, Mac Shorty Headers and H-Pipe, Flowmaster 2 Chamber Mufflers, K&N Filter Thanks for any advice. __________________ If not now, when?

02-14-2003, 11:48 AM	#5
1984 GT Registered Member Join Date: Mar 2002 Location: Gainesville, Fl Posts: 59	oops...transmission T-5, sub frame connectors, removed front sway bar __________________ If not now, when?

02-14-2003, 12:20 PM	#6
Ackbar00 Rebel Fleet Commander Join Date: Oct 2001 Location: Huber Heights, OH Posts: 1,003	Something is up. Mine made more power with less parts. Not to mention 50 less cubic in. and a stock cam. __________________ 1993 Mustang GT, PTK w/ T-64 - My Cardomain Webpage 11.25@123.5 on only 8 psi. 10.84@121 on only 1 headgasket "The Truth is, Your the Weak, and I am the Tyranny of Evil Men!"

02-14-2003, 12:24 PM	#7
Murdock Registered Member Join Date: Dec 2002 Location: Columbus, OH Posts: 100	I need the cam specs. What ratio rocker are you running? Murdock __________________ LARZRACECARS larzracecars.com

02-14-2003, 01:41 PM	#8
1984 GT Registered Member Join Date: Mar 2002 Location: Gainesville, Fl Posts: 59	It's a Crane 284 energizer lift: intake: .512 exhaust: .512 adv duration: intake: 284 exhaust: 284 crane roller rocker: 1.60 __________________ If not now, when?

02-14-2003, 02:33 PM	#9
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	slicks , 750 dbl pumper, or a little n20 would be cheaper than new heads what suspention mods do you have ? cams almost the same as my turbo set up 280 dur .512 lift so its kinda small for a na 351 __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

02-14-2003, 07:57 PM	#10
Murdock Registered Member Join Date: Dec 2002 Location: Columbus, OH Posts: 100	The Windsor Jr. heads are a little under sized for a 357. I also think you could use more cam lift and get at least your exhaust duration at 50 up into the 234's. Your at 228 right now. I'm not a huge fan of single pattern cams. You might also look into a long tube header with 1-3/4" primaries. The best head IMO for the lift your running would be the TFS Twisted Wedge, but you would have to get them drilled for the 1/2" head bolts. Second I would choose the AFR 185cc heads. Don't forget to check valve clearance! If you could post your dyno that would help more also. Thanks Murdock __________________ LARZRACECARS larzracecars.com

02-14-2003, 11:32 PM	#11
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	A 2.4 60ft, yes lets all add more motor, thats it now a 2.9 60ft should fit the bill. YOUR MOTOR IS NOT THE PROBLEM, GET OFF OF IT AND GET OUT THE HOLE. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

02-15-2003, 01:37 AM	#12
Murdock Registered Member Join Date: Dec 2002 Location: Columbus, OH Posts: 100	Granite he's not getting any traction, but I was looking at his dyno numbers. A 357 should be pulling more than 277 HP and you really don't need to hook up on the dyno roller. 1984 GT, does the car bog at all off the line? Murdock __________________ LARZRACECARS larzracecars.com

02-15-2003, 06:48 AM	#13
1984 GT Registered Member Join Date: Mar 2002 Location: Gainesville, Fl Posts: 59	I don't bog off the line. I haven't run on anything but my street tires so far and can't really launch. I just have to ease out of the hole and be pretty conservative shfting into second. I have an extra set of rims and plan on mounting and using ET streets which should help with my traction problems. I'll try and post my dyno sheets for help later they show a nice clean steady curve up to around 5000 rpm where it tails off. __________________ If not now, when?

02-15-2003, 11:34 PM	#14
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	I will agree, the motor sounds a little shy. What is the chance that the tires were slipping on the dyno? OK stupid question. But really, what is more important the dyno sheet or the time slip? No matter what the dyno sheet tells you, the timeslip says (You need traction) 277hp is what I think I have, But no one at the track knows that, they all think more like 400, ha I wish. Good luck with what ever you decide, The best part is that you are concerned with it. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

02-16-2003, 07:10 AM	#15
1984 GT Registered Member Join Date: Mar 2002 Location: Gainesville, Fl Posts: 59	Thanks to everyone for the input. I guess the bottom line is ET and not HP so I'll look for a new transmission, I'm running the stock T5 which I don't think will last under the pressure of hooking and launching, and probably run ET Streets. __________________ If not now, when?

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