YelCal7

iTrader: (1)

Hey Guys, I wanted to know did anyone has experienced 50# with 2.85 n Ported SC ? Cause I am on 50# with 2.9 n Non-Ported SC. Right now I am seeing my car boosting 13psi then on the way up if I get up to higher RPM. That's why I wanted to know if 2.85 n Ported SC will be better than that.

Vander Nars

iTrader: (5)

13 psi seems low as **** im making like 15psi on a 3" pulley and ported blower

nhanson

iTrader: (1)

Stock is 12 psi

YelCal7

iTrader: (1)

That's strange....I thought that I would be boosting more. Well, It did boost more when I get to higher RPM. That mean must be something is wrong, it could be bad boost valve.

Tjolley

im on a 2.8 with 17-18psi 19psi by redline.
porting and polishing dose wonders.

mrbelvedere

iTrader: (3)

do the boost bypass mod

07MetallicSC

iTrader: (16)

Boost will go down if you port, power will go up, provided you mate it with more fuel and a tune

southal cobalt

iTrader: (3)

what elevation are you at? iat2?? what exhaust mods? thatll all affect boost. there may not be a problem.

when i was stock, id see boost at 13 psi, because im at sea level. then i went to 8k ft above sea level on a trip during the summer in colorado and didnt see above 10 psi.

i have a full catless exhaust on a 2.8 and only see 15 psi. boost isnt a measure of power anyways.

YelCal7

iTrader: (1)

I have BadMab with ZZP 3" Catted DP.

Powell Race Parts

iTrader: (3)

^^^this. Unless the head port is junk or the exhaust is restrictive.

YelCal7

iTrader: (1)

Didn't see that but that TOTALLY make sense.

Speedytec

iTrader: (3)

That works for porting the head...

However the OP talks about a ported SC, which if that flows any more CFM it should at least give similar boostlevel to a standard GM SC.
(Or the SC porting is seriously flawed...)

Tjolley

exactly..my boost went up a lil after i ported my head and sc..