2.8 Pulley with Gm kit
#101
Senior Member
Join Date: 04-13-05
Location: Toronto, Canada
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by glockglade
I am running the stage 1 w/2.8 and i was also the one with the vaccum leak and that was from the injector cap o-ring breaking no big deal 5 minutes to fix. as far as the a/f is concerned you guys need to read what some dynos w/stage 2 actuall prove the graph i just read shows a 11 to 12 a/f ratio w/ the stage 2 kit there is plenty of fuel to do the 2.8 you guys if you don't think so i have been runnig the crap out of my car and it still works perfect i will have a dynograph for you all tomorrow hopefully so we can end this stupid arguement. The injectors are good for up to around 300hp. The stock ones were doing a 12.9 a/f ratio with the rev it up stage kit on the car and they were boosting 17 pounds. So with bigger injectors we should have no problem with our a/f.
#102
Senior Member
Join Date: 04-13-05
Location: Toronto, Canada
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Ok!!! I'm going on a trip to Cancun for a week..........end of April............If I don't hear a resonable response with a reason as to why I shouldn't do stage 2 over a stage 1 with a 2.8.........................then I'll just get the stage two when I get back...............D.U.N. done!!!!
#103
Senior Member
Originally Posted by 1stbluSS
you could get a larger idler pulley for $35 and that will take away the slack.
#104
Senior Member
Join Date: 06-16-05
Location: Buffalo, NY
Posts: 1,356
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by betterthanbad
That still doesn't answer my question.................I want to know..........how do you do a stage 1 with a 2.8 pulley...............what is involved??? i.e stage 1 with such and such pulley with such and such tensioner etc.............and what is the cost and what are the reprocutions of doing this vs. just getting the stage 2 and being a happy customer with warrenty on the car?????????????????????????? I will go out and buy stage 2 tomorrow if this is a better choice but I have seen a few threads about stage 1 with a pulley and I am interested and so is the dealer/all the guys working there!!!!! They would love to do a stage install with a smaller pulley but I don't know what to do at this point with ony a few dyno's and very few who say that they have installed a stage 1 with a 2.8 pulley. If stage 1 with a 2.8 pulley will give more than a stage 2 then that seems to be the way to go. If not, I'll just do stage 2..................help me out brothers!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I bought Stage 2. 1 of the reasons was the smaller belt. A lot of people are running Stage 1 with a South Florida Pulley HQ DUB (Dial UR Boost) setup where the pulley rings are interchangable or Billetflow. The GM Stage 2 kit comes with something simliar to the SFPH DUB System which has a 4 bolt pattern and is interchangable. But I got the idea of purchasing just a 2.8" pulley ring from SFPH and using it with the GM hub. Well this did not work. The HUB on the GM kit is too large to fit inside of the 2.8" ring and the bolt pattern is a little off and the size of the holes were different. The GM pulley ring had larger holes. So the only difference your getting OUT OF THE BOX from Stage 1 to Stage 2 is a smaller belt and a modular (interchangable) pulley system with a 3.0" pulley. You have more to choose from if you were to buy a pulley system from SFPH or Billetflow because you will be able to drop down to a 2.8" or 2.7" where as for now the GM pulley system is capable of the same thing but there are no other pulley rings u can purchase and not even sure if it may be an option. It seems like it because of the modular system being used. But who knows! Stage 2 get's me to about 15psi a 2.8" pulley would put us at about 16-17psi which supposedly for every lbs of boost is about 10hp. So if that's the case u may get an extra 10hp using the 2.8" instead of a 3.0"
And to let everyone know as far as GAS MILEAGE.. I drove from Buffalo to Syracuse and back (w/ Stage 2) and my DIC said I was getting 31mpg. Was doing 80mph the whole way. City driving is 26mpg. before Stage 2 I was at 25mpg. and hwy about 30mpg. but when I get on the gas I watch those numbers fall and they fall almost instantly
#105
Would a stage 1 and a 2.9 pulley be faster than a stage 2, since they supposably have the same reflase and the 2.9 pulley is smaller? Does that sound right. Correct me is im wrong.
#106
Senior Member
Join Date: 06-16-05
Location: Buffalo, NY
Posts: 1,356
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by srt-killer
Would a stage 1 and a 2.9 pulley be faster than a stage 2, since they supposably have the same reflase and the 2.9 pulley is smaller? Does that sound right. Correct me is im wrong.
#108
i seen someone mention the boost bleed off issue with stage 1.... it is the same flash as stage 2 no boost bleeds....
With my stage II and 2.8" pully i am seeing ~125kpa or ~18psi
I am using the florida pully non slip system, the tensoner picks up any slack and i have no belt slipping at all.
Hoping to go for a dyno somethime this week.
#109
Senior Member
Join Date: 03-20-06
Location: Orange Park, Florida
Posts: 503
Likes: 0
Received 0 Likes
on
0 Posts
So after buying stage 2 if you wanted to put a 2.8" pulley on it wouldn't just be an easy job one pulley off another on? It would involve changing the hub as well? How hard? how long? and what steps would involve converting GM Stage 2 3.0" pulley to Intense 2.8" pulley? or vice versa
#113
I think one of the pulley vendors on this site have a pulley with a very similar, if not the same mounting as the stage 2 pulley. Do a search for it, I think someone posted it.
#114
Why spend the money on a stage 2 if your going to change the pulley. just get a stage 1 and put a pulley on. save a ton of money that way, since the only diff. in between the to kits is the pulley.
#115
360 L337 User
Join Date: 08-11-05
Location: Philadelphia, Pa
Posts: 7,454
Likes: 0
Received 0 Likes
on
0 Posts
one reason could be that NOBODY can actually garantee the 2 different reflashes. everytime someone says they are different someone contradicts them and says it isn't.
#116
I went the cheeper way and got the stage 1 with a pulley. I haven't raced a stage 2 yet or seen the dyno's of the two setups yet so im not sure witch is better but i do no that my car is fast with stage 1 and a pulley.
#117
Senior Member
Join Date: 07-08-05
Location: Niceville, FL
Posts: 6,200
Likes: 0
Received 0 Likes
on
0 Posts
Check out the redline forums. I think Sp00ner over there just dyno'd 260whp and 225 ft lbs with Stage 2 and a 2.8" pulley. The A/F ratios look to be pretty safe. That was with just an intake too. A header and exhaust would really open up his car.
#119
Senior Member
Join Date: 03-20-06
Location: Orange Park, Florida
Posts: 503
Likes: 0
Received 0 Likes
on
0 Posts
So how is it that a stage 1 with a 2.8" pulley is equivalent to a stage 2 with the 3" pulley? since basically they are the same thing just one is a smaller pullley shouldn't the stage 1 be greater since its the same kit? and will someone please give me a straight answer is it because of the reflash because i was possibly misinformed when i read the reflashes for both stages were the same?
#121
Im pritty sure gm even said themselves that the flashes were the same, the only diff. was the pulley so im sticking with the stage 1 and the pulley is greater than a stage 2.
#122
Banned
Join Date: 01-09-06
Location: New Glasgow N.S.
Posts: 990
Likes: 0
Received 0 Likes
on
0 Posts
jmac is running it safely right now, i gave him my sfphq 2.8 and im running his 3 inch for now... hes pushing just over 18psi....its totally safe, actually in theory more safe wit hthe stage 2 considering u have the smaller belt.
i dont see why ur all scared.... im prolly the first person to blow the supercharger, i did last week, and they warrentied it with the smaller pulley, cold air intake, among other things.
p.s. it was completely random that it blow, in no way was it the pulley, more of an issue internally with the blades and there alignment
i dont see why ur all scared.... im prolly the first person to blow the supercharger, i did last week, and they warrentied it with the smaller pulley, cold air intake, among other things.
p.s. it was completely random that it blow, in no way was it the pulley, more of an issue internally with the blades and there alignment
#123
Senior Member
Join Date: 12-06-05
Location: Bergen, NY
Posts: 780
Likes: 0
Received 0 Likes
on
0 Posts
does that non slip pulley just bolt on to the same blue bolts on the gm stage 2 hub. basically i'm asking is it really easy to install? did u buy the machined one or the ring one?