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dubkrzy
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Joined: July 02, 2006
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 Posted: Tue Jul 17, 2007 7:12 pm Post subject: W125 vs. FK8 |
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I would like to get feedback on which cam to use on my new engine.
I'm building a 2275 with Tims stage 2 heads and 44 IDF's.
I don't have the rockers yet, so I can go with 1.1's, 1.25's, or 1.4's.
Compression ratio will be 8.5:1
It will go on a street driven 66 full bodied bug  .
Also, any idea on which clutch and pressure plate to use would be helpful. |
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 79687
Location: Sneaking up behind you
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| Posted: Tue Jul 17, 2007 7:15 pm Post subject: |
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I have a 2180 with a FK8 and love it. Easy to drive at low rpm and has tons of torque and revs real quick.
I also have a set of Steve Tims Stage 2 heads. Carbs are 48 IDAs.
Clutch is a KEP Stage 1 with ACE Copperhead disc.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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Last edited by Glenn on Wed Jul 18, 2007 7:04 pm; edited 1 time in total |
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dubkrzy
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| Posted: Tue Jul 17, 2007 7:18 pm Post subject: |
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Glenn,
What cam did you have on your other motor? |
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Glenn
Mr. 010
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| Posted: Tue Jul 17, 2007 7:18 pm Post subject: |
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Scat C-35
My current is the best combo i've driven in a street car. Smooth enough for every day and plenty of power when you need it.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
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dubkrzy
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| Posted: Tue Jul 17, 2007 7:22 pm Post subject: |
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Does the 125 cause more wear on the valve train?
And what about clearance issues as far as the pushrod tubes.
And by the way did you looki into any of the web-cams. |
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Glenn
Mr. 010
Joined: December 25, 2001
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| Posted: Tue Jul 17, 2007 7:23 pm Post subject: |
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| dubkrzy wrote: |
| And by the way did you looki into any of the web-cams. |
After speaking to a number of people, the K8 seemed thje best choice for what I wanted.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
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dubkrzy
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| Posted: Tue Jul 17, 2007 7:28 pm Post subject: |
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Alright, sounds good to me.
The reason I picked those two cams to choose from was because Greg Tims suggested one or the other for my combo. He didn't seem to have a preference on way or the other. So the only other question is what rockers are you using. |
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vwracerdave
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Joined: November 11, 2004
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| Posted: Wed Jul 18, 2007 6:38 am Post subject: |
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I would choose the FK8 and 1.4 rockers over a W125. More expensive and more work setting it up, but less overall wear on the valve train. You need to use the JayCee pushrod tubes.
Stage I with a Daikin Super disc.
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
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Glenn
Mr. 010
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| Posted: Wed Jul 18, 2007 6:46 am Post subject: |
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I'm using CB rockers.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
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turboblue
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Joined: October 09, 2003
Posts: 4216
Location: Central Indiana
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| Posted: Wed Jul 18, 2007 7:40 am Post subject: |
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| Glenn wrote: |
| dubkrzy wrote: |
| And by the way did you looki into any of the web-cams. |
After speaking to a number of people, the K8 seemed thje best choice for what I wanted. |
There is a slight difference between a FK8 and a K8.
FK8 is an Engle cam
.382 lift at the cam with 298 advertised duration.
K8 is a CB cam. They use part #2288.
.378 lift at the cam with 308 advertised duration.
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Gary
Turbo VW Sand Drag Buggy
"If you don't run into the Devil every once in awhile, you must be going in the same direction!" |
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Glenn
Mr. 010
Joined: December 25, 2001
Posts: 79687
Location: Sneaking up behind you
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| Posted: Wed Jul 18, 2007 8:28 am Post subject: |
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| turboblue wrote: |
| Glenn wrote: |
| dubkrzy wrote: |
| And by the way did you looki into any of the web-cams. |
After speaking to a number of people, the K8 seemed thje best choice for what I wanted. |
There is a slight difference between a FK8 and a K8.
FK8 is an Engle cam
.382 lift at the cam with 298 advertised duration.
K8 is a CB cam. They use part #2288.
.378 lift at the cam with 308 advertised duration. |
I missed the F and misspelled "thje"
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare
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tkelley
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Location: Where Pterodactyls crash and burn...
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| Posted: Wed Jul 18, 2007 8:40 am Post subject: |
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He wants only 8.5 compression, will the fk8
work well with that compression? Just asking.
Tom |
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turboblue
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Joined: October 09, 2003
Posts: 4216
Location: Central Indiana
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| Posted: Wed Jul 18, 2007 9:02 am Post subject: |
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| Glenn wrote: |
| turboblue wrote: |
| Glenn wrote: |
| dubkrzy wrote: |
| And by the way did you looki into any of the web-cams. |
After speaking to a number of people, the K8 seemed thje best choice for what I wanted. |
There is a slight difference between a FK8 and a K8.
FK8 is an Engle cam
.382 lift at the cam with 298 advertised duration.
K8 is a CB cam. They use part #2288.
.378 lift at the cam with 308 advertised duration. |
I missed the F and misspelled "thje" |
I see.
No harm, no foul....... 
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Gary
Turbo VW Sand Drag Buggy
"If you don't run into the Devil every once in awhile, you must be going in the same direction!" |
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67Beetle2017
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Joined: August 01, 2006
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Location: Pasadena CA
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| Posted: Wed Jul 18, 2007 10:03 am Post subject: |
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| tkelley wrote: |
He wants only 8.5 compression, will the fk8
work well with that compression? Just asking.
Tom |
I have used the Norris 355S w/1.4s with 8:1. This was in my 67 bug. The power was good but I was looking for more response down low and in the mid.
Same engine with only a compression change.
When, compared to my other engine combo 10.5:1 w/Norris 355S w/1.4's(very similar to the FK- vs 355S w/1.4s and 8:1 the power and snappy response was night and day. (both engines used 44IDF's at one point). Power was stronger through the whole powerband.
Cam change:
I used the Norris 407S w/1.25's (very similar to Engle W125) in 8:1 configuration with good results. I noticed the 407S pulled harder in the bottom to midrange where the FK-8 pulled more in the mid top end.
10.5:1 configuration w the 407S produced very good midrange. The engine was great for being help at a constant rpm then stabbing the gas and go. I felt at the time the 407S produced a better overall powerband for my combo.
NOTE: I was using stock gear ratios. the 407S recovered better between gear changes than the 355S.
Moved engine to my bus to make was for my Berg clone 2110 w/FK-8:
Note 10.5:1 with the 407S produced pinging in the bus that was not present in the bug, so I opted to lower the compression to 8:1.
The engine I was using was a 78X90.5. This was the only engine I had at the time that had both 8:1 and 10.5:1 (with same heads) and both 407S and 355S cams. For the 8:1 configuration in the bus I stayed with the 407S w/1.25's.
Sorry not an actual 2275 or Engle FK-8 or W125 but that is the closet actual experience I had resembling a back to back comparison. all done in a period from (1982-87)
I have used the actual FK-8 in my Berg 2110 (1992) clone engine (10.5:1) and the power was like Glenn said.."Easy to drive at low rpm and has tons of torque and revs real quick." I was using a Berg5 with that combo.
In my experience, the FK-8 likes to see a slightly higher compression.
If you are you using stock gear ratios?
IMHO I would choose the W125 w/1.25's with an 8.5:1 engine.
Hope this helps. |
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Tkisner
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Joined: May 15, 2004
Posts: 275
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| Posted: Wed Jul 18, 2007 11:42 am Post subject: Re: W125 vs. FK8 |
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| dubkrzy wrote: |
I would like to get feedback on which cam to use on my new engine.
I'm building a 2275 with Tims stage 2 heads and 44 IDF's.
I don't have the rockers yet, so I can go with 1.1's, 1.25's, or 1.4's.
Compression ratio will be 8.5:1
It will go on a street driven 66 full bodied bug .
Also, any idea on which clutch and pressure plate to use would be helpful. |
You shouldn't just choose a compression ratio you want to run on a motor. You should match it to the octane you intend to run what camshaft the motor has etc. etc. |
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tkelley
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Posts: 1597
Location: Where Pterodactyls crash and burn...
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| Posted: Wed Jul 18, 2007 11:51 am Post subject: |
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Thats what I was thinking Tkisner, also 8.5 compression
on a w125 seemed off. I know a w120 loves 9.0.
I haven't used an fk8, so I wasn't sure.
Tom |
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dubkrzy
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| Posted: Wed Jul 18, 2007 6:34 pm Post subject: |
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Thanks guys,
After reading the responses, i guess i am not sure if greg recomended K8, or FK8.
So with 8.5:1 compression (so I can use 87 octane gas), which cam would run better.
I want it to idle nice and have crisp throttle response.
right now i have a stock gearbox, but I am replacing it with a tranny from Rancho that has a 3.88:1 R&P. |
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rterfert
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Posts: 1419
Location: Yuma Arizona
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| Posted: Wed Jul 18, 2007 6:52 pm Post subject: |
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Have you looked into the
Engle Fk-10
Makes A Lot Of Power....Same basic lift with more duration.
The Fk-10 is .385" Lift At The Cam and 310 Degrees of Duration
With 1.4:1 rockers You Get A .539" Lift At The Valve.
The Fk-8 is .382" Lift At The Cam and 298 Degrees of Duration.
Both are Designed For Use With 1.4:1 Rockers,
I was going to use the engle Fk-10 in my 2275cc VW and am now going water cooled. |
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dubkrzy
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| Posted: Wed Jul 18, 2007 7:00 pm Post subject: |
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Actually, I have a brand new Engle w-130 in the box.
Would it be too much cam for my combo? |
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Lag_Smurf
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