Need Boost Advice with 91 Octane, 8.5:1 & AFR225 Heads
02-10-2008, 11:47 PM
#11
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I think trever1t meant before the throttle.
What pulley are you running currently, and what are some smaller sizes available? What are the specs on your cam? How much power have you made at 12 psi, and what are your IATs and timing numbers?
What pulley are you running currently, and what are some smaller sizes available? What are the specs on your cam? How much power have you made at 12 psi, and what are your IATs and timing numbers?
I am so tired, please excuse that one! Yes, thanks Henry, before the TB.
02-10-2008, 11:58 PM
#13
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I really do not know the timing numbers, etc and the specs of the CAM. I will definitely get those and post them.
Running the standard 7.5" damper and a 3.375" charger pulley. Cannot really go any smaller since with the 3.3L Whipple even with the 10 rib belt it will start slipping.
I think I made so many changes that the car just does not feel well. Big part of it may be the 4L80. It feels like I am towing something with the car.
The car stock had 345HP with the 6.0L, came with 10:1 comp pistons and I had headers on it and the Radix 1.8L good for 5.5ft-lbs. It was pretty fast, nothing outragous. But now with this motor, 416cuin, 3.3L charger at 12psi and larger valve heads,CAM, more fuel, lunati crank, etc, the difference just does not seem to be that much...
I will get the specs and post them.
Any thoughts abotu the 4L80? Everyone scared me aout the 4L65 and the 6200lb AWD car. I think I over reacted should have just gone with the 4L65 built up.
Running the standard 7.5" damper and a 3.375" charger pulley. Cannot really go any smaller since with the 3.3L Whipple even with the 10 rib belt it will start slipping.
I think I made so many changes that the car just does not feel well. Big part of it may be the 4L80. It feels like I am towing something with the car.
The car stock had 345HP with the 6.0L, came with 10:1 comp pistons and I had headers on it and the Radix 1.8L good for 5.5ft-lbs. It was pretty fast, nothing outragous. But now with this motor, 416cuin, 3.3L charger at 12psi and larger valve heads,CAM, more fuel, lunati crank, etc, the difference just does not seem to be that much...
I will get the specs and post them.
Any thoughts abotu the 4L80? Everyone scared me aout the 4L65 and the 6200lb AWD car. I think I over reacted should have just gone with the 4L65 built up.
02-10-2008, 11:58 PM
#14
You are all forgetting that lower compression is great for turbos, but not always for posi blowers. 
Your lack of compression is killing your power in this case. Change the compression, or change the style of FI.
Rick
Your lack of compression is killing your power in this case. Change the compression, or change the style of FI.Rick
02-11-2008, 12:13 AM
#16
02-11-2008, 12:26 AM
#18
02-11-2008, 08:13 PM
#20
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The best thing I can reccomend is ditch the s/c and get something without any parasitic loss......Nah Im just joking or maybe not...lol.......But yeah you have to realize that psi per c/r point will be radically different between 8.5 and 10 : 1.........
In terms yes to get the same response you will need to increase pressure or efficiency,,,,,,
Dont mess with the timing 2 much or you will me knocking more than a door to door salesman,,,,!!!!
In terms yes to get the same response you will need to increase pressure or efficiency,,,,,,
Dont mess with the timing 2 much or you will me knocking more than a door to door salesman,,,,!!!!