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Matt Barret
Dodge Dakota
JOIN HERE
4/12/2002
09:05:32
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 Subject: 4.7L HO Cams info
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I just ordered the 4.7L HO cams , parts numbers are 53021411 and 53021412. These are listed as 2002 Jeep Grand Cherokee Powertech 4.7L HO.
PRICE : $75.00 EACH !!!!!!!!!!!!!!!
If you all want these cams you'd better order soon. There are only about 5 sets left in the country today AND the price is probably a mistake and will be corrected at some point. My parts manager says they should be priced around $200 each !!
Per CW's info the lift spec are:
I .500" E .443" HO model (265hp)
I .429" E .440" Stock (230hp)
Duration is unknown at this point.
Matt Y2K-HEMI
'00 RC 4.7L 5spd
14.23 @ 94.49
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CW
GenIII
4/12/2002
14:40:27
|  RE: 4.7L HO Cams info
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Oh BTW I goofed on the intake lift. The specs from the manual are .475" lift intake and .429" exahust. Stock are .440" intake and .429" exhaust. Duration very simular between the two. Worked well on my truck guess we will see if it works on your truck Matt. Still a desent jump on the intake side. Hope they work as well for you as they did for me. If your truck reacts like mine did expect more bottem end and with the cat removed to be able to rev to 5500 no problem.
2001 4.7 RC 5sp 3.92 LSD
Click on thumbnail for mods.
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Art
Dodge Dakota
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4/12/2002
14:53:22
| RE: 4.7L HO Cams info
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Kinda hard to imagine 35 hp from that little of change
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Matt Barret
Dodge Dakota
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4/12/2002
15:04:04
| RE: 4.7L HO Cams info
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Thats ok, the intake lift is probably more important. There was no change on the Exhaust at all??? Do you have the Duration specs?
For $150 investment its not that bad. Really you can't buy anything for $150 anymore and expect results!
I'll strap it to the dyno and we'll know the results !!
Matt Y2K-HEMI
'00 RC 4.7L 5spd
14.23 @ 94.49
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CW
GenIII
4/14/2002
17:50:25
| RE: 4.7L HO Cams info
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I would have to get the duration specs from work. It may be hard to belive but I did testing to be as accurate as I possibly could. Everything was very simular temp, weather conditions, launch, IAT adjustment. I don't guarentee it will get 2 to three tenths on anyone elses truck. Matt will only be the second person I know of just to change the cams alone and not do anything else ast the same time. He will be able to tell if it works on his.
Like you say the Matt, you really can't buy much for 150. Worth a try IMO. You are a more experienced drag racer than me and will be able to tell if they help at all.
2001 4.7 RC 5sp 3.92 LSD
Click on thumbnail for mods.
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JoeC
Dodge Dakota
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4/15/2002
01:09:27
|  RE: 4.7L HO Cams info
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What about the heads??
Parts guys says # for heads are different too.
He though heads would make more diff than cam.
What do you guys think??
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CW
GenIII
4/15/2002
08:57:09
| RE: 4.7L HO Cams info
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To pricey, might as well get the stock ones ported.
2001 4.7 RC 5sp 3.92 LSD
Click on thumbnail for mods.
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Matt Barret
Dodge Dakota
JOIN HERE
4/15/2002
09:04:01
| RE: 4.7L HO Cams info
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CW, thanks for the info. To be honest you I really don't put much faith in 1/4 mile times, just too many variables, but you can probably say yes it will improve times, or no it won't. From your testing it looks like there is going to be improvement. About the only way to nail down the HP increase is dyno testing. Luckily I have some good dyno numbers for my truck, and I have a dyno shop which is very close by.
If you can CW, see if you can get the duration for the 2 cams, and check on the cylinder head valve sizes HO vs stock.
Thanks for the info !!
Matt
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CW
GenIII
4/15/2002
14:32:56
| RE: 4.7L HO Cams info
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I am sure that the valve sizes are the same and I will look up the duration specs as well. Personaly I think it was worth it just for the added power down low. It is more fun to drive on the street now.
2001 4.7 RC 5sp 3.92 LSD
Click on thumbnail for mods.
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Matt Barret
Dodge Dakota
JOIN HERE
4/15/2002
15:25:18
| RE: 4.7L HO Cams info
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True, I can't imagine a new casting for the HO model. I too would be surprised if there were any differences. Thanks in advanced for the duration specs.
Matt
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CW
GenIII
4/15/2002
19:54:41
| RE: 4.7L HO Cams info
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I got the specs.
Intake
lift .472" VS .443"
duration 236° VS 243°
The overlap is a mear 18°
exhaust
lift .429" reg 4.7 same
duration 250°
Exhaust and intake size are the same between engines. The intake duration is advertized as less but like I say my truck seems to like it.
2001 4.7 RC 5sp 3.92 LSD
Click on thumbnail for mods.
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Turbofreak
Dodge Dakota
JOIN HERE
4/15/2002
21:06:52
| RE: 4.7L HO Cams info
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Message:
I tried to buy these cams today and two different part people said that they couldn't pull the number up on their system....
help.
Ryan
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alex
Dodge Dakota
JOIN HERE
4/15/2002
21:26:56
| RE: 4.7L HO Cams info
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Tell them it's a Jeep part number.
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chris
Dodge Dakota
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4/15/2002
21:40:42
| RE: 4.7L HO Cams info
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If you are using the part #'s from this post you will need to add the letter A to one part number and B to the other at the end of the number.
CW, is ther any difference between the throttle bodies?
chris
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CW
GenIII
4/15/2002
22:12:21
| RE: 4.7L HO Cams info
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Don't know for sure about the TB but I don't think so.
2001 4.7 RC 5sp 3.92 LSD
Click on thumbnail for mods.
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Matt Barret
Dodge Dakota
JOIN HERE
4/16/2002
08:07:32
| RE: 4.7L HO Cams info
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Thanks for looking that up CW ! Interesting that they lowered the duration. This may explain the improved low end, although a 7° change is'nt much.
Matt
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CW
GenIII
4/16/2002
09:19:19
| RE: 4.7L HO Cams info
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Slightly lower duration and increased lift. I didn't notice and top end loss at all and like I say it helps you get out of the hole better.
2001 4.7 RC 5sp 3.92 LSD
Click on thumbnail for mods.
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Jeff
Dodge Dakota
JOIN HERE
4/16/2002
18:28:41
| RE: 4.7L HO Cams info
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I haven't jumped into the 4.7 on my 2000 Dakota yet... does Daimler Chrylser use any torque to yield or non-reusable fasteners in their engines? I am seriously considering the cam swap - just want to make sure I don't have any unforseen expenses other than gaskets and the cams. I know I should buy a book but... what are the chances somebody could supply me with the torque specs?
Also, what else is different in the new HO 4.7 besides the cams? Does it have a revised brain that works better with the new internals? Just curious if they did any exhaust or cat modifications. My trucks oomph has remained stock for too long - it's time to dig in.
Thanks,
Jeff @ PLC
www.PerformanceLifts.com
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alex
Dodge Dakota
JOIN HERE
4/16/2002
19:05:02
| RE: 4.7L HO Cams info
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Message:
They use a lot of torque to yield and torque to angle specs. I can fax you the pages for the cam swap out fo the factory manual, but I am slammed at the office. Give me a few days, then e-mail me. truck_nut@hotmail.com
Jeeps only other POWER PRODUCING mods are the computer and the cams. Every other difference in the HO motor is for strength.
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Turbofreak
Dodge Dakota
JOIN HERE
4/17/2002
20:03:19
| RE: 4.7L HO Cams info
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Message:
Thanks Chris!!!
I will try those numbers again with the A and B suffixes...
My Dakota should be delivered in the next day or so, then the fun starts!!!
Later,
Ryan
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Jeff
Dodge Dakota
JOIN HERE
4/18/2002
14:35:42
| RE: 4.7L HO Cams info
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No rush Chris... I've got a couple other projects that could use my attention. When you get some time let me know. Also, does anyone have any dyno numbers that they can post in regards to the CAM swap. I need to be making more power before the current max output for towing reasons.
Thanks,
Jeff @ PLC
www.PerformanceLifts.com
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