YankeeVert.

The XFI lobes have two different lifts. The second set have less lift. I read that the lower lift is for the exaust. Can these lobes be used on the intake? I want a small cam with a good smooth idle. If the lower lift lobes can be used they still give more lift than the XE-R lobe. and come in a lower duration. How bad are they on spring life? How come we don't see many people using them?

I would like a cam a little bigger than the GT2-3. So if you can use these lobes how will this cam perform?

XFI lobes 212/218-.580/.590 116 LSA

YankeeVert.

Nobody has any info on these lobes?

Tom@SpeedInc

iTrader: (5)

XFI has lobes for intake and exhaust, have xfi cam in my 402, 236/242 .615/.612. IIRC duration @ .200" is the same for likewise XFI and XER lobes.

1989GTA

You are correct. There are two sets of XFI lobes with the shorter lift being for the exhaust lobes. You are only talking around .005" difference in the lifts with a 1.6rr. I have the XFI cam on my L98 with the 218@ .050" and 224@ .050" on the exhaust. The idle is almost like stock at 750rpm. The vacuum is just short of 15" which is good.


As for the springs the lobes where designed around Comps beehive springs and Pro Magnum rockers. From what Bret has said the rpm limit seems to be in the mid 6000's. They should be killer lobes for a street machine.

More people may be using them than known. I bet a lot of the custom cams use the lobes. I know of a custom cam here locally that was specked using the 224 XFI lobes on both the intake and exhaust. The owner had it cam doctored at Chet Herberts do to a bad situation with the guy who did the heads and specked the cam.

YankeeVert.

So I can use the XFI exhaust lope for a intake lobe ?

Patrick G

iTrader: (14)

You can if you're looking for a softer, lazier lobe.

YankeeVert.

I have PP gold springs. Are they good enough for this lobe? How would you rate this lobe in regards to spring life? Is it tougher on springs than the XE-R lope?

Thanks

YankeeVert.

So it looks like I can use the XFI exhaust lobes. How do you think my "custom cam" would compare to the GT2-3 cam?

GT2-3 207/220-.571/.578 118.5 LSA

Custom Cam 212/218-.58/.59 115 LSA

Do you think it will make more HP? The VE look better for the street. Do you think the idle will be stealth (-15* ol)?

I am looking for a smooth idle and 6300/6400 RPM shift points. Also I have PP STAGEII LS6 heads that flow 300cfm @.60 lift.

Quick Double Nickel

iTrader: (5)

Your custom is very close to my 216/216 .588/.588 114+2. I haven't had the opportunity to run it yet, but I'm looking forward to using it in my DD.

YankeeVert.

Yes it is. Where did you find a lobe that gives you a .588 lift@216* duration?

Quick Double Nickel

iTrader: (5)

I bought the cam off a guy on another forum with only 50 miles on it I think. He had it custom ground by a place called More Performance, Inc. located in Charlotte, NC. I'm not sure if it's XE-R lobes or XFI, but either way I think it will be great for my DD. Good luck on finding yours.

Asmodeus

If you have Patriot Gold Springs, why are you debating over .005 lift? and around the .610 area? Honestly..

You'd prob be better off with an X-ER lobe than an XFI exhaust.. you're leaving power on the table.

I have the same springs, and I'm not even hesitating to put a 228.7/.644 intake lobe (LSK) into the car.

YankeeVert.

1. I am looking to get 25/30 K spring life.

2. I want a small cam with high lift. The XE-R lobes do not come in low duration.

3. I am willing to leave some HP on the table to meet my goals A smooth idle is my top priorioty. Hence the small cam.

Quick Double Nickel

iTrader: (5)

I agree with YankeeVert on this. Plus, I got my cam for pretty cheap and didn't want to go to crazy out of the gate. I wanted something I knew would run good (with the XE-R lobes) and still work well with a stock, or close to stock tune. I image in the not-so-distant future I will change out the cam for something bigger. But, right now I just want to get the conversion taken care of and then go for the upgrades later.

YankeeVert.

Bump for opinions on the cam.

BOWTIE

Looks like the LSK go down to a 216, but has .629 lift. You could also go with a different ratio rocker to get your lifts up. You may also want to check the other cam companies. Life does exist outside of Comp Cams.

YankeeVert.

I read in another post not to use PP gold springs with the LSK lobes.

BOWTIE

True, but I think you can upgrade just the springs and still use the retainers and seats. Of course you would need to verify that with Patriot.

YankeeVert.

Bump for more input.

Ragtop 99

iTrader: (7)

I'd use the XFI 214 lobe and 220 Xer lobe and put it on a 114 LSA. Straight up for a basic mid-range and top end performance or 2* Advance for a little better bottom end.

If you have headers, I'd bump the 214 to the 218 and run with 2* advance. 218/220 114 has -9 overlap. It will idle very smoothly. If you are an A4 with a stock stall I'd go back to your 115 lsa with the 214/220 115 113