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Old 08-22-2012, 03:44 PM   #1
kurion
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Member#: 75543
Join Date: Nov 2004
Location: MD
Vehicle:
05 05 WRX 4eat
PSM 2.5 35R

Default Cam questions/opinions wanted on Kelfords 199-D vs 199-G

Hi,

I'm on the final stages of my motorbuild and I'm trying to decide between what cams to use. (Kelford 199-D vs. 199-G) Details on motor/car

Motor - EJ257 - Cosworth 9.2 compression pistons
Heads - B25 STI heads 1mm oversized valves and dual valvesprings (supertech inconel/ss valves and valvetrain)
No AVCS - 2.0 WRX ECU
Intake manifold - Tomei ITB
Rev Limit - 7500-8000
Turbo - EFR 8374 T4 .92

The set I have currently, but not installed are the Kelford 199-D

Inlet Duration @ 0.25mm: 272
Exhaust Duration @ 0.25mm: 264

Inlet Duration @ 1.00mm: 232
Exhaust Duration @ 1.00mm: 222

Inlet Valve Lift @ 1 to 1: 9.40mm
Exhaust Valve Lift @ 1 to 1: 9.35mm

Inlet Centerline @ Full Lift: 113
Exhaust Centerline @ Full Lift: 113

The set I'm thinking of putting in are Kelford 199-G

Inlet Duration @ 0.25mm: 282
Exhaust Duration @ 0.25mm: 282

Inlet Duration @ 1.00mm: 240
Exhaust Duration @ 1.00mm: 240

Inlet Valve Lift @ 1 to 1: 10.50mm
Exhaust Valve Lift @ 1 to 1: 10.50mm

Inlet Centerline @ Full Lift: 110
Exhaust Centerline @ Full Lift: 117

So the reason I'm thinking of going with a larger cam is because
1) I will be using a pretty large turbo (8374)
2) I have ITBs which mitigates some of the downsides of long duration cams
3) I want to be able to make power all the way to redline - and don't want that normal torque dropoff.
4) car is a 4eat with a High Stall torque converter so I'm more concerned about power at 4k+ rpms
5) car is/will be used for road course.
6) I already have BC adjustable cam gears so timing/degree the cams are not an issue

So any opinions, on which cam set will be better, i.e. the 199-D vs 199-G would be appreciated. If anyone has any experience with the 199-G I'd love to hear that too.
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Old 02-28-2013, 03:43 PM   #2
2pot
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Hi
Which cam did you go for in the end? How did it work with your 4eat. I'd love some feedback on the 199-D, if you used it.
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Old 02-28-2013, 04:57 PM   #3
kurion
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05 05 WRX 4eat
PSM 2.5 35R

Default

Stuck with the 199-D since the wait on the 199-G was over 6 months. Final tune for power is on the 9th so I'll know more then.

In terms of just regular driving around town - they feel pretty mild, no issues with idle or tuning them - but they aren't all that aggressive to begin with.

Also ended up using a completely different turbo/header - went with a lowmount, gtx35R - should be interesting to see the plot....
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Old 02-28-2013, 05:17 PM   #4
Speed
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05 BUILT 2.4L STI

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The specs you listed for the R-199-D are way different than what they are:

According to Kelford the R-199-D have:

Advertised duration @ .25mm

Inlet 280
Exhaust 278

Duration @ 1mm valve lift

Inlet 240
Exhaust 236

Nett lift

Inlet 11.55mm
Exhaust 11.00mm

Suggested centerline

Inlet 130
Exhaust 115

That a lot more aggressive than what you have. Maybe that's why they feel so mild
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Old 02-28-2013, 05:25 PM   #5
2pot
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Hi
Did you pick the 199-D cams, because of the big duration difference between inlet and exhaust? Did you think they would work well with the 4eat?
I'm pleased they're good around town.
I'd be really interested to see the plot too!
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Old 02-28-2013, 05:32 PM   #6
kurion
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05 05 WRX 4eat
PSM 2.5 35R

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Speed
R-199-D ARE NOT THE same as the 199-D one is for AVCS and one is for not AVCS

Kelford doesn't really even list the 199-D anymore
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Old 02-28-2013, 05:46 PM   #7
2pot
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Quote:
Originally Posted by kurion View Post
Speed
R-199-D ARE NOT THE same as the 199-D one is for AVCS and one is for not AVCS

Kelford doesn't really even list the 199-D anymore
I emailed Kelford, before I found your opening post, to see if they'd do a 199-D profile, but for V4 sti heads.
As you rightly say, they're not listed on Kelford's own site.
I asked for their opinion, on that profile, with an auto. Obviously, their answer will be in theory. You're doing it in practice.
Hence my interest in a plot.

Last edited by 2pot; 02-28-2013 at 05:53 PM.
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Old 05-13-2013, 06:13 PM   #8
weps
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2002 WRX
Silver

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Updates? Thinking of getting these cams!
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Old 05-18-2013, 10:21 AM   #9
tja1618
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Chapter/Region: Tri-State
Location: Rochester, NY
Vehicle:
2003 WRX
WRB

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I'm building a similar setup. An EJ257 longblock with B25 heads using a WRX ECU. I ended up going with the 199-Es (non-AVCS), which have a 274 intake and 270 exhaust. I just had Headgames motorworks install them along with a valve job and pocket port package. Slight modifications were required so that they'd fit.

I'm really curious about the OPs setup and results. Were the 199-Es not available when you ordered?
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