224/224 Weber Ductile Comp Cam Spring Selection ??

[jmendlik]

What minimum spring pressure is needed to run this cam?. What type of vacum will this cam pull?

It 's the Xtreme Energy XFI Lobe 3015 series. LSA 112
Lobe lift .358 with 1.55 rockers =554.9 lift in my application

I have PAc1201x now with 150LB seat pressure at 1.750 install. Will these support this cam up to 6000 RPM without issues @ .554 lift?

not planning to spin this past 6000-6200 ....95% street car but want the best performance possible

My Combo:

250 CU Stroker Stage1
E85 Fuel-120lb injectors
9:1 Compression-
GN1 Aluminum Heads Race Ported 1.55 T&D Shaft Rollers
Pac1201x SPrings 150Lb seat
Johnson Reduced Travel Lifters
Champion Race Intake
PTE 6466 Dbbl with .63AR
PTC 9.5 NL 17 blade Converter approx 3200 stall

 

[turbo nasty]

Minimum of 150 on the seat. What lifters are you using?

 

[jmendlik]

Johnson Reduced Travel Lifters from Bison

 

[turbo nasty]

These springs are in the car now running and your having issues?

 

[jmendlik]

yes in car no issues with these springs on my 218/224.....but long story but i have a 218/224 roller in the car that needs to be replaced and I was looking to replace it with either the same 218/224 or move to the 224/224..

Just wondering if my Pac1201x will work if I went to the 224/224..i hear different opinions...

people say the XFI lobes will be super hard on valvetrain-more than xtreme series which is my 218/224

also i hear you should have 170 Lb on set...

 

[Pronto]

Have you called Weber and asked what they recommend?

 

[jmendlik]

yes-they said it would work awesome!......but i hear others say different....I would rather have real world results from people who have this new XFI lobe in their combo

 

[jmendlik]

Ttt

 

[jmendlik]

Any others with opinion?

 

[forcefed3.8's]

What is the open pressure of the 1201x?

 

[jmendlik]

My setup :
Springs are 150#@1.750 and 445# @1.250".

 

[rag231]

I would stick with Weber's rec and Vacuum doesn't affect the power master.

 

[jmendlik]

any others with thoughts or experience with this cam??

 

[dank GN]

I had ran this cam with 130 on the seat and 410 open . It was Alil on the weak side but I had no issue with Spining it up to 6800 max .