Thread: JWT high lift cams for turbo

but what have you done to your VE? you probably have more mods than just an SSAC header.

OK, maybe I should be posting this in the turbo section, but I talked to Ben at JWT this morning. JWT has been using HL series cams for quite a while in project cars but for some reason didn't promote them until not too long ago.

From what I understood the HL cams are designed to give more air flow without moving the power band further up the RPM range.( the way the S4 moves the power band further up than the S3 )

The question of which is better S4 or the S4HL seems to depend on your setup/modifications. The S4HL cams can give more power than the S4 and within the same RPM range IF your engine can take advantage of the increased air flow.( more boost,bigger turbo, etc.)

Not trying to start an (NA) DE vs VE discussion since I believe the VE is the better flowing head but I would think that, with the right mods, the S4HL cams should make the DE more competitive with VE.

Anyway, the general impression I came away with is the HL cams are the ones to use. Can anyone with more technical knowledge point out some drawbacks?

You aint kidding.

Ive seen nicks old n1d ser run down t25 dets. Rob also has ran down some t25 dets with his ve down in fl.

I believe when people say there de hung or beat a ve, but the likely hood of that ve being in proper shape isnt likely, either that or home boy couldnt drive lol.

Stratton.

Like I keep saying, get the HLs, there seems to be no reason not to.

call JWT and see what they say about them and your setup..

in the little bit of playing me and a buddie with a ve with a wai/header/2.5 oem exhaust/high flow cat/N1's/nistune seems to keep up with my mostly stock BB setup....so far....we'll see what happens at the track this summer

The DE is sick. It's just one of those freak SR20s, I don't know how else to explain it. It was fast as hell without the cams and even faster with them. Fast enough to stay next to a VE B13 with I/H/E. The DE has CAI, no name header, OBX pulleys, S4HL cams, JGY 8.8lb flywheel, random ebay six-puck clutch.

Twas a close race to be honest.

That is correct. Increasing the lift while in the same duration makes more power.

S4HL cams are bad-ass, imho. I have only .475" of lift in 264* of duration right now. Peak power at 7100 RPM. Shift point at 7700 RPM.

Kylr, earlier posts suggest they are great for turbo applications. concur??

the more flow you get the better, as far as I know, and more lift = more flow