i am on the way to the movies with the lady a while ago and i decide to get into it a little and watch my afr( good at 11.1) and i slowly move the pedal to wot. i think the most boost i saw was like 7 psi. it didnt feel very fast either. so im thinking it could be belt slip but kind of doubt it since im using a reichard pulley thats smaller than the previous vortech pulley i had( vortech was a 3.1 making 11 psi and this is reichard 3.0 making 7 psi) but it could be the belt im not sure. is there any way to check to seee where im losing the boost?

my new motor is lower compression and does breathe alot better with p&p heads and a cam. but i didnt think id lose this much boost.

btw my motor has over 800 miles on it.

 

I was makeing 10psi on my stock motor with a 3.0 pulley and now with a 2.8 on my built motor it's only makeing 8lbs. I went up a few cubic inches and a set of cnc'd heads.

 

the cubes didnt hardly chaneg at all on mine though but 4 psi is alot . espeacially with a 3.0 pulley i think i should be making more . the 8 rib set up is looking to be my next mod but man its expensive. i just want to know why. i think the is the last bug i need to work out. i fixed my tb i think i fixed my oil leak and now this.

 

I am not saying it's your problem but I lost 2-3lbs you lost 4lbs and I had a slightly bigger change in pulley size. What do you have for vacuum at idle?

 

im pulling 15 inches at idle . but after thinking about it i didnt get it past 5k rpms so that could also be my culprit being a centrifigal. the belt slip may be an issue but ill just need to get the smallest possible pulley i can find.

 

I was just gonna say chase, you are centrifigal right. LAY INTO that **** and report back.

 

I'd bet the belt is slipping alittle

 

I'm thinking you didnt stay in it long enough, with that centrifugal it most likley would have picked up a few more psi if you had stayed in it. I agree with Dewy......stay in that **** and report back
How hot was the weather? That will cost ya maybe 1 psi or so too.
Again.....run that biatch to redline and let us know

 

run that bitch to redline and let us know if you have a matching set of block windows

 

If it's belt slip, a smaller pulley isn't going to help. A 8 rib setup with a larger diameter crank pulley would be a better solution to belt slip.

You're not skeeeeeered to let that thing eat are ya?