X-ram manifold
Pro
Joined: Apr 2003
Posts: 552
Likes: 13
From: Oz
Originally Posted by V-twin 63
At the x-ram site the sale throttle bodies that should be able to handle the modifications I was thinking about doing to it, 383 ect. Here's what they say they can do :2"/672 cfm for stock 305 engines.
2.055”/710 cfm for lightly modified 305’s and stock 350’s
2.07”/720 cfm for lightly modified 305’s and 350’s
2.1”/740 cfm heavily modified 305’s and moderately modified 350’s
2.113”/750 cfm heavily modified 350’s and moderately modified 383’s
2.155”/780 cfm heavily modified 383’s and mildly modified 406/415’s
2.17”/790 cfm heavily modified 383’s and moderately modified 406/415’s
2.18”/800 cfm heavily modified 406’s and mild 427’s
2.195/810 cfm heavily modified 406’s and mild 427’s
2.21”/820 cfm moderately modified 427’s and mild 430’s
2.22”/830 cfm moderately modified 427’s and 430’s
2.235”/840 cfm heavily modified 427’s/430’s and lightly modified 440’s
2.25”/850 cfm moderately modified 440’s and mild 454’s
2.275”/870 cfm heavily modified 440’s and moderate 454’s
2.3”/ 890 cfm for heavily built 454’s (600+hp)
Up to a 890 cfm. seems like that should handle it, I don't know about the flow the x-ram will give me thow.
Thanks
2.055”/710 cfm for lightly modified 305’s and stock 350’s
2.07”/720 cfm for lightly modified 305’s and 350’s
2.1”/740 cfm heavily modified 305’s and moderately modified 350’s
2.113”/750 cfm heavily modified 350’s and moderately modified 383’s
2.155”/780 cfm heavily modified 383’s and mildly modified 406/415’s
2.17”/790 cfm heavily modified 383’s and moderately modified 406/415’s
2.18”/800 cfm heavily modified 406’s and mild 427’s
2.195/810 cfm heavily modified 406’s and mild 427’s
2.21”/820 cfm moderately modified 427’s and mild 430’s
2.22”/830 cfm moderately modified 427’s and 430’s
2.235”/840 cfm heavily modified 427’s/430’s and lightly modified 440’s
2.25”/850 cfm moderately modified 440’s and mild 454’s
2.275”/870 cfm heavily modified 440’s and moderate 454’s
2.3”/ 890 cfm for heavily built 454’s (600+hp)
Up to a 890 cfm. seems like that should handle it, I don't know about the flow the x-ram will give me thow.
ThanksGetting the air in is not the problem. Fuel is the problem.. I run 90lb/hr 454 injectors at 20psi and they are almost static at 90% duty cycle at WOT.. If I made them any 'bigger' with more fuel pressure, the pulse widths at idle would be too short... Low 12's are within reach, but 11's will take considerable work...
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by qws
maybe because I had 3.07 gears already installed I never noticed.
Originally Posted by qws
I "felt" a big differance after the x-ram and rr's were installed. If I manually shift it 2nd gear seems like it just explodes and puts you well into your seat. According to the X-ram website they recommend the fuel pump to be replaced.... don't know if I really agree with that... for me I'm not out driving over 120 mph!
When I installed my manifold, with no other changes, I experienced an approx 3/4 of a second improvement in my 1/4 mile ET.
RACE ON!!!
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
Originally Posted by CFI-EFI
You seem pleased with your 3.07 gears. Actually, the 3.07s were the worst ratio you could get in an '84. The 3.07s were standard and most of the 51,547 cars built had them. If you ordered the Z51 handling package, you could have also ordered the 3.31 gears. The Z51 didn't come with these gears, but the Z51 had to be ordered to be able to order the gears. Only 410 cars were built with the 3.31 gears, and it was a 1984, only, option.
Originally Posted by CFI-EFI
The way to tell if your pump is "up to snuff" is to test it. Connect a gauger and go for a ride. At WOT, wind that sucker as high as you dare. The higher the gear, the better. All the while watching the pressure gauger. If it can't hold pressure under extreme circumstances, it's time for a replacement. If it DOES maintain pressure, there is nothing to be gained in a fuel pump change. My stock (but not the original) '84 pump holds a steady 14 PSI at 6200 rpms in second gear. "Driving over 120 mph" won't create the demand for fuel that my test does.
Le Mans Master
Joined: Sep 2000
Posts: 6,303
Likes: 714
From: Bartlett IL
Originally Posted by ben73
Getting the air in is not the problem. Fuel is the problem.. I run 90lb/hr 454 injectors at 20psi and they are almost static at 90% duty cycle at WOT.. If I made them any 'bigger' with more fuel pressure, the pulse widths at idle would be too short... Low 12's are within reach, but 11's will take considerable work...
You need to install an EBL so you could use the vacuum port on your VAFPR. My 80# injectors at 20psi are at about 75%. Of course, you've got more cubes and more power.
Forza Azzuri!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by qws
I am pleased with the gears, since my rearend is out of a 95. They are not from a 84. I was orginally under the impression that I had the 2.59's. So YES, I'm pleased
Originally Posted by qws
I never questioned whether my fuel pump was "up to snuff". But thanks for the information. I'm sure that someone doing a search will also find it very useful
RACE ON!!!
[EDITED] To make the quotes appear correctly. No content was altered.
Last edited by CFI-EFI; Jul 10, 2006 at 06:53 PM.
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
I am pleased with the gears, since my rearend is out of a 95. They are not from a 84. I was orginally under the impression that I had the 2.59's. So YES, I'm pleased[/QUOTE]Sorry! My crystal ball is still in the shop. I had no idea you had swapped diffs. And I never imagined a little general information would be so offensive,
I had realized that you didn't know I changed out the differential that is why I wrote that mine is from the 95. You had better hurry up and get that crystal ball fixed
[/QUOTE]I never questioned whether my fuel pump was "up to snuff". But thanks for the information. I'm sure that someone doing a search will also find it very useful[/QUOTE]That is right. You said that you were not "out driving over 120 mph!". I merely wished to point out that high speed cruising wasn't the greatest demand that you could put on your fuel system, and how to test it, if you cared to. I never suggested that you NEED to or HAVE to or even that you SHOULD test it. Once again, I never imagined a little general information would be so offensive,
RACE ON!!![/QUOTE]
I never knew of that test and is something that may be useful down the road or to other CF members. You provided good useful information as you always do. Thank you
I had realized that you didn't know I changed out the differential that is why I wrote that mine is from the 95. You had better hurry up and get that crystal ball fixed
[/QUOTE]I never questioned whether my fuel pump was "up to snuff". But thanks for the information. I'm sure that someone doing a search will also find it very useful[/QUOTE]That is right. You said that you were not "out driving over 120 mph!". I merely wished to point out that high speed cruising wasn't the greatest demand that you could put on your fuel system, and how to test it, if you cared to. I never suggested that you NEED to or HAVE to or even that you SHOULD test it. Once again, I never imagined a little general information would be so offensive,
RACE ON!!![/QUOTE]
I never knew of that test and is something that may be useful down the road or to other CF members. You provided good useful information as you always do. Thank you
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by qws
I had realized that you didn't know I changed out the differential that is why I wrote that mine is from the 95. You had better hurry up and get that crystal ball fixed
RACE ON!!!
