PDA

View Full Version : Upgrading Eaton pulley


Marauder Rick
04-22-2011, 08:36 PM
As it stands right now, i have the stock upper pulley on my eaton with a +2 lower giving me approx. 10psi. I got a 3.0 and a 2.8 pulley from metco when i was putting together my eaton swap about a year ago. I've gotten quite use to the boost and im ready to slap one of my other pullies on, but need to know what else i HAVE TO do for the functionality of the engine. will i need a new tune? Will my 39lb injectors supply the demand of a 3.0 pulley? Whats up?
Bradley G
04-23-2011, 03:10 AM
I had to upgrade my fuel pump and Maf.
Marauder Rick
04-23-2011, 06:13 AM
I had to upgrade my fuel pump and Maf.
I already have a ford gt fuel pump and an SCT BA-3000 whitch is like SCT's biggest baddest MAF sensor. Anything else?
SC Cheesehead
04-23-2011, 06:57 AM
I already have a ford gt fuel pump and an SCT BA-3000 whitch is like SCT's biggest baddest MAF sensor. Anything else?

Possilby a MAFia, depending on current performance of your MAF.

What are you running for exhaust? May want to upgrade if still running OEM.

Also, check out this site to estimate boost from various pulley combinations.

http://www.boost.xu1.net/
Marauder Rick
04-23-2011, 02:20 PM
Possilby a MAFia, depending on current performance of your MAF.

What are you running for exhaust? May want to upgrade if still running OEM.

Also, check out this site to estimate boost from various pulley combinations.

http://www.boost.xu1.net/

well this just leaves two questions that i SHOULD know the answers to. Is stock 3.6? If not the what? and how big is a +2 lower?
SC Cheesehead
04-23-2011, 04:10 PM
well this just leaves two questions that i SHOULD know the answers to. Is stock 3.6? If not the what? and how big is a +2 lower?

I've got the dimensions on my laptop, will get them to you by Monday at the latest.
Marauder Rick
04-23-2011, 07:30 PM
I've got the dimensions on my laptop, will get them to you by Monday at the latest.

Thank you very much
ImpalaSlayer
04-23-2011, 08:55 PM
a 3.0 with a +2 should yield about 14psi. thats what it made on my car.

gt pump
39s
no mafia
435/432
12* timing
Marauder Rick
04-23-2011, 11:26 PM
a 3.0 with a +2 should yield about 14psi. thats what it made on my car.

gt pump
39s
no mafia
435/432
12* timing

Did you have 2 make any changes to your tune when you upgraded?
justbob
04-24-2011, 12:17 AM
What's the stock upper size? My T kit came stock with a 3.4. I put a 3.2 on with zero changes to the tune, but noticed little to no difference at all. BUT, there is room in the Trilogy tune for a future 3.2 pulley or CAI, I don't know how safe your tune is.
ImpalaSlayer
04-24-2011, 09:06 AM
Did you have 2 make any changes to your tune when you upgraded?


What's the stock upper size? My T kit came stock with a 3.4. I put a 3.2 on with zero changes to the tune, but noticed little to no difference at all. BUT, there is room in the Trilogy tune for a future 3.2 pulley or CAI, I don't know how safe your tune is.

that is the only combo i ever ran, what are your current numbers and timing?
SC Cheesehead
04-28-2011, 07:06 AM
Thank you very much


A couple days late, but I have the info, check your PMs.
RacerX
04-28-2011, 08:15 AM
That boost calculator on the web page above seems to be less accurate the more you go up in boost.
With a 3.0" upper and a 4lb lower and 4,604 ccs, it's telling me I'll be @ 19 psi... I wish!!!

Stock is 3.65" This is nice to print out too:

http://www.mercurymarauder.net/gallery/data/579/EatonPulleyCombinationsUpdated 09-08.jpg