| From | Message |
03graphrt
Dodge Dakota
JOIN HERE
10/28/2002
14:34:30
|
 Subject: 4.7 auto vs r/t
IP: Logged
Message:
hey are the 4.7 auto reg cabs as fast as the sticks??i have a cc r/t and just wondering cuz i dont want to look stupid if he beats me even thjo im prety confident ill win.he has a throttle body spacer and exhaust.thats it.oh and just wondering what are some stock r/t dyno #s?thanks.
|
Clevite 77
GenIII
10/28/2002
14:55:48
| RE: 4.7 auto vs r/t
IP: Logged
Message:
Seems like your the new guy on the boards, but for a who will beat who question, just look around the performance section, there's plenty of posts like this.
It will be close, but I think you'll take him, what gears does he have? (3.55's or 3.92's) from the sounds of it he doesn't do too much research, because he would know that a TB spacer doesn't help any. What kind of exhaust does he have? If he has a high performance cat back, it might help him out a bit, but if he has the ol' custom duals, it will actually hurt him off the line. All and all, both being autos, you should spank him.
Oh and with a good driver, sticks are usually if not always quicker than a auto, unless....... it has a hypo torque convert with a high stall and a shift kit.
Line-X Over The Rail Bed Liner
Home Brew Intake
Dual Exhaust
3923 Autolite Plugs
Krypton 4300K Blue/Whites
Euro Clear Corners
Grille-Tech Grill Insert (Silver)
TPS Set At .705
Removed Rubber Flap
I've used Mobil -1 Full Synthetic Oil And Filter Since I Had 6,000 miles
|
03graphrt
Dodge Dakota
JOIN HERE
10/28/2002
16:28:59
| RE: 4.7 auto vs r/t
IP: Logged
Message:
hey yea i am prety new to the boards but ive been posting here and there for like a month or two now.but yea i know he has duals not sure what kind tho.and i wil race him soon, the only thing that he has advantage is weight.
|
Clevite 77
GenIII
10/28/2002
16:59:09
| RE: 4.7 auto vs r/t
IP: Logged
Message:
weight??? yea but you have more power
A simple TB and exhaust, will have your truck not only beating him, but you'll slaughter the guy, and if you really want to hurt him, drop a cam into that thing. I'm sure Bernd at speedtweaks can help you out with that one.
An auto 4.7L basically stock, with what sounds like a "sound and no go" exhaust and possibly a peg-leg with 3.55's don't stand a chance.
In the mean time practice your launces. and the day you race him, if you have the opportunity, air down your tires a bit, that'll help with traction.
let us know how it goes
Line-X Over The Rail Bed Liner
Home Brew Intake
Dual Exhaust
3923 Autolite Plugs
Krypton 4300K Blue/Whites
Euro Clear Corners
Grille-Tech Grill Insert (Silver)
TPS Set At .705
Removed Rubber Flap
I've used Mobil -1 Full Synthetic Oil And Filter Since I Had 6,000 miles
|
03graphrt
Dodge Dakota
JOIN HERE
10/28/2002
17:02:56
| RE: 4.7 auto vs r/t
IP: Logged
Message:
ok thanks and i have the stage 3 cold air for inetnse and mbrp super single already on the truck, looking into getng the b&g flash and a throttle body but i heard the Tb doesnt do that much, i duno any more i hear some much crap that things work and these dont, so i im just tryin to see what you guys think i should do next?computer(kenne bell or b&g) or throttle body??and ill will race him next time i see him.
|
Clevite 77
GenIII
10/29/2002
02:12:24
| RE: 4.7 auto vs r/t
IP: Logged
Message:
go to:
speedtweaks.net
This is a good site for performance tips, although from reading a lot of posts lately, I wouldn't jump into a major order from them.
http://www.krcperformance.com/newcontent/home.html
Some will argue about a tb (good or bad) but it all comes down to more are in + more air out = more power.
Check out this site for some good machined OE pieces for a very reonable price. Not to mention it won't void your warranty like others because unless the dealer really looks at the thing it appears as a stock tb. but here's the site, check it out.
www.thefastman.com
this should give you some kind of direction for mods, you find plenty more, the more you visit this site, I had to settle for the 4.7L because I couldn't get the 5.9L in a 4x4 CC and I didn't want a QC, but anyways I'm not real familiar with the mods for the push rod motors (all but 4.7L) so just keep looking around.
http://www.hughesengines.com/www/hughesengines/
http://premier-automotive.net
dakota-durango.com
Line-X Over The Rail Bed Liner
Home Brew Intake
Dual Exhaust
3923 Autolite Plugs
Krypton 4300K Blue/Whites
Euro Clear Corners
Grille-Tech Grill Insert (Silver)
TPS Set At .705
Removed Rubber Flap
I've used Mobil -1 Full Synthetic Oil And Filter Since I Had 6,000 miles
|
Demon Dakota
DakotaEnthusiast
10/29/2002
10:02:18
| RE: 4.7 auto vs r/t
IP: Logged
Message:
Clevite77, I hate to inform you, but the information on your dual exhaust assesment is incorrect. I gaind both HP and TQ when switching to true duals and a removed third cat. Although the 360 still has the edge in TQ, the higher RPM 4.7L HP range could save me (or anyone else) in a true 1/4 mile race. It's really going to depend on the driver in this matter, but even then I would still give the edge to the R/T due to the slightly higher rear wheel torque.
K&N Drop in AF
True Dual exhaust and removed third cat
HO Cams & HO Intake
Modified TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod
|
Clevite 77
GenIII
10/29/2002
12:10:06
| RE: 4.7 auto vs r/t
IP: Logged
Message:
whaaaaat?!?!?!?!
you went to true duals (off the manifold, you have a set of pre-cats, and 2 pipes running the length of the truck out to the back like a stang, and you gained off the line tq and hp?????? All I did was remove the 3rd cat (I mean it fell off hehe) and from the performance muffler, I have 2 3" pipes ran out the back. I really noticed a loss in off the line performance, and so has many others, which is due to the decrease in back pressure, but here's the catch, I gained more top end than the loss in low end performance. Is that where you gained your power to, or are you running forced induction?
From what I've seen a thousand times on this board is for the best off the line performance exhaust (on a stock, or near stock motor) is the Gibson cat back, My setup, probly gives me better top end, but off the line the Gibson has much better results
Line-X Over The Rail Bed Liner
Home Brew Intake
Dual Exhaust
3923 Autolite Plugs
Krypton 4300K Blue/Whites
Euro Clear Corners
Grille-Tech Grill Insert (Silver)
TPS Set At .705
Removed Rubber Flap
I've used Mobil -1 Full Synthetic Oil And Filter Since I Had 6,000 miles
|
Clevite 77
GenIII
10/29/2002
12:20:40
| RE: 4.7 auto vs r/t
IP: Logged
Message:
Hey Demon, I do have a question about the HO stuff,
I'm heading to PA soon (from Detroit) to visit a college buddy and I thought of doing the cams only, did you notice improvement with the intake? I hear it takes away from the bottom end but adds more top end, for the price, was it worth it and would you do it again?
Line-X Over The Rail Bed Liner
Home Brew Intake
Dual Exhaust
3923 Autolite Plugs
Krypton 4300K Blue/Whites
Euro Clear Corners
Grille-Tech Grill Insert (Silver)
TPS Set At .705
Removed Rubber Flap
I've used Mobil -1 Full Synthetic Oil And Filter Since I Had 6,000 miles
|
Demon Dakota
DakotaEnthusiast
10/29/2002
15:37:56
| RE: 4.7 auto vs r/t
IP: Logged
Message:
The HO Intake moved the max HP to a higher overall RPM range, but it didn't really take anything away from the bottom end (at least not in my opinion). I'm not forced induction yet (that's planned for early 2003), but my numbers off the dyno after the exhaust and just the drop in K&N filter were just over 208 RWHP and just under 270 RWTQ. I ran this 3 consecutive times (not in a row, but my truck ran those numbers all three times it ran). All I can say is that it worked for me. I think that the back pressure loss in duals isn't as bad as the y-pipe constriction for overall flow on single/split outlets. If you go to a size of pipe that is too large, then yes, I can see the loss of backpressure. But the 4.7L doesn't need 3" dual pipes off the intake manifolds/precats. I say go with 2" pipes and make sure to get the two pipes the same overall length. That's what I did (only now I have a damn rattle where one of the welds is on the right side muffler). OK, I think that was a long enough reply :)
K&N Drop in AF
True Dual exhaust and removed third cat
HO Cams & HO Intake
Modified TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod
|
chris
Dodge Dakota
JOIN HERE
10/29/2002
18:21:24
| RE: 4.7 auto vs r/t
IP: Logged
Message:
I am not running true duals, but I am running a dual cat back. I also gained off the line power as well as hp and torque. I have 70mm throttle body, home brew intake, and dual exhaust and iv took a r/t with exhaust. He got me off the line, but by 50 I was dead even with him, and by 70 was half a car length ahead.
--
Chris
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
