Pulley Wars-Final Pulley Battle Winner

[combatstang]

Re: JKD COBRA

Originally posted by ghostrydyr
How or where do you base this on? I'm not questioning you on this I actually really want to believe since I am about to put a 2.8.


Thanx:beer:

good question


Im ordering billow flows 2.76 today

yay!!1

 

[JKD COBRA]

ghost - there is nothing wrong with questioning. Especially on forums where false info can be posted all the time.

I am basing my opinion on dyno results AND track results from owners of 2.93 pulleys and 2.80 pulleys. And I am also basing my opinion from my own experience with a 2.93 pulley and 2.80 pulley.

If you look at everyones track times, you will see that the 2.80 pulley will almost always perform better at the track. You may only gain 5-15hp, but you will gain 20-40 more rwtq. Because our cars are so heavy, torque is very important. I have PM'ed a few people on this board that run low 11's, and they have used the 2.93/2.80 pulley. So far, everyone has said they definately run faster with the 2.80 and would never switch back to the 2.93.

I don't have a true back to back dyno comparison, but I did go from a 2.93 pulley with an aftermarket throttle body to a 2.80 pulley and back to the stock throttle body. With the 2.93/TB I put down 440rwhp and 422rwtq. . . then with the 2.80 pulley and stock TB I put down 452rwhp and 470rwtq. (these dyno's were not on the same exact day). I could also feel a good SOTP difference from the extra torque down low. The car felt much better with the 2.80. Unfortunately, I did not run the car at the track with the 2.93 before I took it off. But just from the SOTP feel and dyno numbers alone, I will not switch back to a 2.93.

Now there are a few people that say there car runs better with the 2.93, this could be true. Every car is different. But assuming all else is equal, and both cars have good tunes, the 2.80 will be faster.

 

[JKD COBRA]

grandestang - don't forget about the lightning. They have been around for a while, and they are all using the eaton blowers. They have been doing all of this stuff long before we have.

If your running 18psi or more then who knows, there have been a couple eaton that seized. But if your just running a 2.93/2.80/2.76 pulley, from what I have seen you will blow your motor before the eaton fails :shrug:

 

[realsmith]

I was thinking 2.93 to keep from using the idler and more likely to be able to use the predator. I've only heard of 1 or 2 Eatons ever failing. I think longevity is why Eatons are used. There are still some old SC T-birds running around with a zillion miles on them.

 

[SVT4ME]

Going throught these same questions because I want to change my pulley soon.

 

[ghostrydyr]

ghost - there is nothing wrong with questioning. Especially on forums where false info can be posted all the time.

I am basing my opinion on dyno results AND track results from owners of 2.93 pulleys and 2.80 pulleys. And I am also basing my opinion from my own experience with a 2.93 pulley and 2.80 pulley.

If you look at everyones track times, you will see that the 2.80 pulley will almost always perform better at the track. You may only gain 5-15hp, but you will gain 20-40 more rwtq. Because our cars are so heavy, torque is very important. I have PM'ed a few people on this board that run low 11's, and they have used the 2.93/2.80 pulley. So far, everyone has said they definately run faster with the 2.80 and would never switch back to the 2.93.

I don't have a true back to back dyno comparison, but I did go from a 2.93 pulley with an aftermarket throttle body to a 2.80 pulley and back to the stock throttle body. With the 2.93/TB I put down 440rwhp and 422rwtq. . . then with the 2.80 pulley and stock TB I put down 452rwhp and 470rwtq. (these dyno's were not on the same exact day). I could also feel a good SOTP difference from the extra torque down low. The car felt much better with the 2.80. Unfortunately, I did not run the car at the track with the 2.93 before I took it off. But just from the SOTP feel and dyno numbers alone, I will not switch back to a 2.93.

Now there are a few people that say there car runs better with the 2.93, this could be true. Every car is different. But assuming all else is equal, and both cars have good tunes, the 2.80 will be faster.




Good enough for me. Thanks a lot JKD COBRA


:burnout: :burnout:

 

[04-MystiChrome]

Early Winner Declared

Since this is my thread I feel it's time to declare an
early winner in this election. 2.80 Wins!

Other Items Worth Noting That "MIGHT"
Be Derived From This Poll:

If you have 4.10+ gears go with a 2.93.
If you don't want an idler go with a 2.93.
If you want max HP & TRQ go with the 2.80 but use idler(s).
Most don't use a 2.80 without idlers possible slip without.
A DUB would be good for those undecided on a pulley.
:bowdown:

 

[dougwg]

ya know what is wierd...

only 20 votes for the "Lower Than a 2.80 With Idler(s)"

I have sold many.... MANY times that amount:shrug:

BTW: what does the 2.8 win?:??:

 

[Spotless 10th]

Originally posted by dougwg

BTW: what does the 2.8 win?:??:

Dust from sitting on the shelf after poll!!

 

[IronTerp]

Originally posted by JKD COBRA
I don't have a true back to back dyno comparison, but I did go from a 2.93 pulley with an aftermarket throttle body to a 2.80 pulley and back to the stock throttle body. With the 2.93/TB I put down 440rwhp and 422rwtq. . . then with the 2.80 pulley and stock TB I put down 452rwhp and 470rwtq. (these dyno's were not on the same exact day). I could also feel a good SOTP difference from the extra torque down low. The car felt much better with the 2.80. Unfortunately, I did not run the car at the track with the 2.93 before I took it off. But just from the SOTP feel and dyno numbers alone, I will not switch back to a 2.93.

JKD,
Agree with you totally about the superior performance that can be derived from the 2.80. But, I question the degree of difference. Of course the TB switch is the unknown variable here, but you gained 48 ft lbs of torque with the pulley change? That's a significant improvement, to say the least. I recently went from a 3.10 to a 2.90 and gained 7.5 ft lbs. I know that there will be improved performance with the 2.80, but don't feel it's normally as dramatic as some potray.

BTW, really enjoy reading your posts on this Forum....been great teaching tool for me.

 

[JKD COBRA]

Iron - thanks man, I really appreciate it. I always try to help out whenever I can.

And your right, the TB being on for the 2.93 and not for the 2.80 does skew the results some. It was not a 'true' back to back comparison, but it was the closest first hand experience I have had with both pullies.

But from what I have seen, you can gain anywhere from 15-45rwtq with a 2.80 pulley swap assuming that the tune is good. It is really hard to compare dyno numbers from the forum, because some people make 440rwtq with a 2.93 and other people say they put down 460-470rwtq with a 2.93. So all I have to go by is dyno's in my area. 'Generally', people put down around 440-450rwtq with a 2.93, and the people running the 2.80 pulley are pushing 470-490rwtq with a 2.80.

But like I mentioned before, I have a friend who dyno's on a mustang dyno and he didnt really gain anything when he went from a 2.93 to a 2.80, but he said the car felt better. But I think that was a rare case. For the most part, everyone who has swapped to a 2.80 will never go back to a 2.93.

 

[1 BLOWN V8]

I purchased the snout with the 2.93 pulley and very happy so far. For now I am happy with my combo making 434 HP and 455 torq on a very moddest tune with 11.8 A/F and 20 WOT timing. Maybe in the future with a 2.8 but I doubt it. Thats my 2-cents at least.
:burnout:

 

[71stang99]

currently have the 2.9, bought the 2.76 plus idlers so thats where my vote went

 

[wuplash]

Originally posted by kaboom
2.80 reichard racing with all the idlers!!!

are your power numbers sae or std???

 

[wuplash]

rr2.60 the upper pulley torque king:bowdown: :-D

 

[nothing]

Originally posted by dougwg
ya know what is wierd...

only 20 votes for the "Lower Than a 2.80 With Idler(s)"

I have sold many.... MANY times that amount

i was wondering this also....a poll was also done that asked what brand was recommended and billet flow, amazon, rr and sfph were the most used, most of these guys all make a 2.76 instead of a 2.80

but that poll may be newer than this one, so this may have changed if done today

 

[Hy_Dro]

Just voted - Patiently waiting for my Billetflow 2.76 and idlers to arrive.

 

[RAZRS EDGE]

I was just curious. Bear with me, I'm new to the Cobra. What is the big difference between a 2.93 w/ idlers and a 2.80 w/ idlers, besides the extra 2 or so psi of boost. Is it just a better deal to go with the 2.80 setup? How much driveablility/reliability is lost if I go with the 2.80 setup instead of the 2.93, if any? Sorry for the stupid question. I'll eventually catch on :bash:

 

[badstang]

I am fine with my RR 2.8 pulley and Gates belt with NO idler:rockon:

-Mike

 

[03BLKSNAKE]

Will change it soon? When the warranty runs out!