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DKZ 4seven
Dakota Enthusiast
 
3/13/2003
02:05:21
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 Subject: 4.7L : To stroke or not?
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Sure it's do-able. But feasable? How would "torquing" this "revving" engine prove to be? Especially with OHC's.
If so, wonder if Marty @ KRC would develope a stroker kit for the 4.7.
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Notchlx
Dodge Dakota
JOIN HERE
3/13/2003
07:54:46
| RE: 4.7L : To stroke or not?
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Torque'ing?
Umm, let's try this. Into a high revver? Stroke it out, and slap some forged pistons in it, sturdy gaskets, beefed internals, worked heads, 218cams with new springs etc... a good short runner intake, FAT throttle body, headers, and exhaust.
A 4.7 that will turn on the up-side of 7,500rpm, and make awesome power. Due to CUBE envy I don't believe you would get the TORQUE down low, that would compare to a 408, so just move the power up in the rpm band.
Of course if this is done, custom work will need to be done to the computer to map the fuel and timing, but definitely "DO-ABLE" Priceworthy??? How much money you got? Want to be the fastest, you have to drop the bills.
I'm sure Marty has probably run a few of these ideas through his head. Prolly just waiting on some interested folks. Give him a call.
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kicker01
Dodge Dakota
JOIN HERE
3/13/2003
09:06:13
| RE: 4.7L : To stroke or not?
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i think it'll be a long time before anyone developes a strocker kit for the 4.7. You might as well port your heads, get some high comp pistons, forged rods, some 206 or 218 cams, and a PCM flash. Then on top of that throw a s/c on or spray it. This is basically what im working towards. All I need is a decent '01 flash and Ill be set till I scrounge up the funds for internals.
CYa.
STEVE
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.alex.
Dodge Dakota
JOIN HERE
3/13/2003
09:08:12
| RE: 4.7L : To stroke or not?
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There's already a German company that's stroking these things out to 5.4L, but there's no info on torque, etc....
I ran the idea by Marty, but his opinion was to rev the sh*t out of the motor, instead of making it a torque monster. It makes sense. you have to have cubic inches to make torque, and with this small of a motor, you are working at cross-purposes. Just let it rev and make the power all the way across the band.
If you want low-end, get the Kenne Bell screw-charger.
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xplikt
GenIII
3/13/2003
13:35:57
| RE: 4.7L : To stroke or not?
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I think it's already pretty damn impressive this motor can rev to 6K with the cat removed and still be making some decent power. For a V8 in a truck, that is mighty high. I have to agree, this motor isn't a torque monster and we shouldn't try to force it to be. Our 5.9 to 4.7 dilemma is almost the exact same as the 5.0 vs 4.6 Rustang's.
Just get some gears :)
-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out | straight piped 3rd cat | turndown tip
Full Hotchkis (bars, springs, shocks) and RAS
Shaved emblems and antennae
150BM fan | removed clutch | HD Radiator
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sandman
Dodge Dakota
JOIN HERE
3/14/2003
00:45:43
|  RE: 4.7L : To stroke or not?
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The mass is staying about the same so the engine should still rev nicely and RPM limit is mostly determined by valve train. I do not think htat this amount of strokeing will negatively affect the ability of the engine to rev quickly and should in no way affect the peak RPM's unless secondary harmonics become an issue. Anyone that has built a Chevy 383 would be hard pressed to tell any difference in RPM limit or how quickly they rev compared to an OEM 350. Now if you were compareing the 496HP Chevy 289V8 that would turn 7500 RPM's all day long at the track to say a 383 then yes you will notice a huge difference! A 289 hitting solid at 7500RPM's sounds like a trillion agry Bee's are comeing after you!!!
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Demon Dakota
DakotaEnthusiast
3/14/2003
14:59:03
| RE: 4.7L : To stroke or not?
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Much like the DZ 302 sound when equipped with 4.56 gears....God I love that engine! My friend had on that he hand built in a Chevy II. car was quick as hell in the 1/4...real quick
K&N Drop in AF (CAI during summer months)
True Dual exhaust and removed third cat
HO Cams & HO Intake
FASTMAN 70mm TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod
14.52@94.2 MPH at Silver Dollar Raceway
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darcy
GenIII
3/14/2003
15:02:39
|  RE: 4.7L : To stroke or not?
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Alex, do you know the name of the german company? Do they have a website?
2002 Dakota Sport 4.7 V8 Club Cab
www.dodgetruckworld.com/darcy/
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j
GenIII
3/14/2003
15:17:33
| RE: 4.7L : To stroke or not?
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Message:
The mass may remain the same but the speed of the piston will increase to maintain the same rpm. The force required to stop the piston at tdc (and bdc) and start it moving again will increase.
2000 4.7 CC auto, clear corners, Magnaflow catback, Kenne Bell s/c.
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.alex.
Dodge Dakota
JOIN HERE
3/14/2003
16:11:49
| RE: 4.7L : To stroke or not?
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http://www.startech.de/homee.htm
Go to the PROGRAMS section and click on the Jeep Grand Cherokee link. It makes our motor a 5.5 liter motor and the power figures look kinda weak. Like 285 hp and 355 lb-ft of torque.
I'm making that almost that much right now with the Leach flash, HO cams, HO intake, big exhaust and 72mm TB. Plus StarTech looks like a company that thinks a lot of their own work. As in, you gonna pay out yo azz for this one.....
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darcy
GenIII
3/14/2003
23:28:49
| RE: 4.7L : To stroke or not?
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Yeah, no kidding! Thanks for the link... just think though, all the power you'd be making with those mods on a 5.5 instead of a 4.7...
2002 Dakota Sport 4.7 V8 Club Cab
www.dodgetruckworld.com/darcy/
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Demon Dakota
DakotaEnthusiast
3/15/2003
13:29:50
| RE: 4.7L : To stroke or not?
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Message:
Why not bore and stroke the 4.7L :) Plenty of room for bigger pistons from what I've seen...
K&N Drop in AF (CAI during summer months)
True Dual exhaust and removed third cat
HO Cams & HO Intake
FASTMAN 70mm TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod
14.52@94.2 MPH at Silver Dollar Raceway
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.alex.
Dodge Dakota
JOIN HERE
3/15/2003
13:32:38
| RE: 4.7L : To stroke or not?
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Message:
Okay, you first!
Have you priced custom cut billet crankshafts?
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xplikt
GenIII
3/15/2003
20:06:47
| RE: 4.7L : To stroke or not?
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Boring wouldn't be too bad. You could bore it and get some custom higher compression pistons from Ross (or another company). Boring is a lot easier than stroking, not as many variables.
-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out | straight piped 3rd cat | turndown tip
Full Hotchkis (bars, springs, shocks) and RAS
Shaved emblems and antennae
150BM fan | removed clutch | HD Radiator
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Demon Dakota
DakotaEnthusiast
3/16/2003
10:07:25
| RE: 4.7L : To stroke or not?
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Message:
Hell, I don't need to stroke my truck. I'd like to bore it out, but I'm just wondering what the maxium size would be. I don't think that we could get 4" out of this thing...maybe something like 3.8-3.9". Anyone know for sure?
K&N Drop in AF (CAI during summer months)
True Dual exhaust and removed third cat
HO Cams & HO Intake
FASTMAN 70mm TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod
14.52@94.2 MPH at Silver Dollar Raceway
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yates-in-DE
*GenIII*
3/16/2003
12:27:06
|  RE: 4.7L : To stroke or not?
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Message:
I have contacted this German Company about the Stroker kits, it includes a stroker crank and larger Pistons and better heads and CAMS. I am waiting for them to get back to me on price from the State Side Distributor in California. The 285 hp and 355 #'s torque for these stroked engines is whith the stock 65mm T-bodies and stock exhaust and such. I believe if you add some of the after market parts a lot of us allready have and 300 RWHP NA, would not be impossible, and they would still be able to rev like they do now. And also with the UNICHIP (I'm going to go let them R&D on my truck in the next few weeks)we shoud see some really great #'s. I'm also waiting for the production Turbo Kit that is only a few weeks away from release (it has been tested and is waiting for the outside Companies to finish some production parts) and I think some 450 to 500 horse 4.7's will be riding around our streets terrorizing the Mama's Boyz camaro's, mustangs and the old Foggie 'Vettes.
Later,
Lynn
 Clic the pic
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darcy
Mechanic
3/16/2003
14:14:22
|  RE: 4.7L : To stroke or not?
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Message:
Lynn, who makes the turbo kit? Do you have any specs or a website?
Demon, I don't think we'd get 4" out of it... the stock bore is 3.66" and the bore spacing is 4.09" so there isn't a ton of room to work with...
2002 Dakota Sport 4.7 V8 Club Cab
www.dodgetruckworld.com/darcy/
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xplikt
GenIII
3/16/2003
14:25:19
| RE: 4.7L : To stroke or not?
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Message:
There is no question whether or not you will be putting considerably more strain on your bottom end going to the same RPMs on a stroked engine. There will be a lot more stress on crank, rods and pins (well at least there are no main bearings). Since you are moving a longer distance, you will be generating more heat. How much I have no fuggin' clue.
It's not a matter of just dumping the stroker kit in there and it's like a chamshaft swap. If I had a stroked 4.7, I would not take it to 6 and 7K without a solid rebuild. Unless you don't mind tearing down your engine every so often.
Stroked engine is not for the faint at heart -- and wallet.
-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out | straight piped 3rd cat | turndown tip
Full Hotchkis (bars, springs, shocks) and RAS
Shaved emblems and antennae
150BM fan | removed clutch | HD Radiator
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Demon Dakota
DakotaEnthusiast
3/16/2003
16:25:22
| RE: 4.7L : To stroke or not?
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Message:
Cool info Lynn. If you don't mind, could you send me the info when you get more of it to my email address? Thanks man! I read about the UNICHIP on dakotausa...
K&N Drop in AF (CAI during summer months)
True Dual exhaust and removed third cat
HO Cams & HO Intake
FASTMAN 70mm TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod
14.52@94.2 MPH at Silver Dollar Raceway
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yates-in-DE
*GenIII*
3/16/2003
22:40:51
| RE: 4.7L : To stroke or not?
IP: Logged
Message:
Well I can Promise you at this time that it's Not Bernd that is releasing the Kit's, and I can't say who till they have it ready for shipping (due to the overwelming flood of e-mails and calls they would get) It will be priced right, and has been fully tested, and can propel a CC 4.7L Sport down the 1/4 on race gas in close to stock Viper Times. :). And I don't know if ya'll know, but Hughes Engine now has a Custom Intake for the 4.7L. I haven't seen the Price Yet.
LAter,
Lynn
Clic the pic
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Demon Dakota
DakotaEnthusiast
3/17/2003
19:23:00
| RE: 4.7L : To stroke or not?
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Message:
I knew of the existance of the custom intake, and I assume it to be metal instead of glass filled polymer composite. And I've pretty much said screw it to the supercharger (my motto is; "If your going to do something, do it right, and do it big"). I'm dumping all my available cash into the "truck fund" that I have budgeted for the purpose of purchasing installing, and tuning a turbo. I just don't know jack about engine/fuel management with a turbo...
K&N Drop in AF (CAI during summer months)
True Dual exhaust and removed third cat
HO Cams & HO Intake
FASTMAN 70mm TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod
14.52@94.2 MPH at Silver Dollar Raceway
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bump
Dodge Dakota
JOIN HERE
4/17/2003
13:26:18
| RE: 4.7L : To stroke or not?
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Message:
bump
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yates-in-DE
*GenIII*
4/17/2003
13:54:51
| RE: 4.7L : To stroke or not?
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Message:
Here is some scoop on the UNICHIP, it is still available and untested on our Engines. And here is why, I was supposed to have a 3 way split on price for some R&D, well someone fell off the list, then they offered it to me for a reduced price of (are you ready for the reduced price?) $795 to do the R&D. The Everyday normal Price is $995. This is not tested and they said it may get 5 hp or 25 hp, no one knows for sure. At a 3 way split I was willing to take a chance, but not at $795. Even if you get it, it will have to produce 28 hp to be worth $995. (and I don't see it happening)
Now on the 5.5L Stroker kits for the 4.7L engines from the Germans. They said they don't import them here any more and it's Not a kit, you have to purchase the whole engine (and the price is reasonable if you are Bill Gates) for $20,449 Euro Dollars. Yep, and then Pay them $1,200 more Euro Dollars to install it for you. Now granted it's a New Engine, but I think for about $23,000 American Money I can Get a Crate Viper Engine, Tranny and Have it Set up with Dual Turbos. And be a whole lot stronger than a 5.5L stoker Motor.
Later,
Lynn
Clic the pic
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Mr.H
Dodge Dakota
JOIN HERE
4/17/2003
22:43:14
| RE: 4.7L : To stroke or not?
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$23,000 ,
Tell em' ta' lick my unwashed balls!
I'd rather just buy an HO crank, forged rods, HO heads, some good forged pistons, get the heads ported, get all the other nic-nac's for the motor that's available, put 20's on er' with custom paint and body, 2 turbos with a liscense plate that says 2-Turbos, and put a $10,000 down payment on a Mastercraft.
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