home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 11-23-2020, 01:28 AM   #1
StreetForged
Board Member
 
Join Date: May 2018
Default Best Cam Option for NA Budget Drift 240?

My plans are fairly dead set on a K or H cam, though it seems that H cams are very hard to find. What I was wondering, was if there were still options in 2020 like the RSI cams, and if there would be any reason for me to go up a step from an OEM cam?

I ported my exhaust side of the head and my exhaust manifold, and intend to do the intake too when I replace some of the old gaskets. It is likely that I would get a header down the road, and the car is currently set up with a catless side dump. I have an MSD 6A ignition system, a lightweight flywheel with M47 and welded 3.73 rear end, and am planning on getting an E-fan and adjustable cam gear. I have also considered the possibility of shaving the head a little bit in the future. Car weighs about 2520lbs as of last week without fuel.

Power goals aren't very high; I'd be happy to make 140-150 to the wheels, and it wouldn't be bad for the setup to be decent with a small OEM turbo setup down the line, if I decide to swap to a T5 or something similar. The car already can drift 2nd fairly well, but I'd like to have more power up high without such a huge dead range with the M cam, and it would be awesome if 3rd gear drifts were possible at high speed/RPM. I'm thinking that an M47 should survive an NA drift build for a while if it's treated well.
__________________
StreetForged is offline   Reply With Quote
Old 11-23-2020, 01:35 AM   #2
spock345
Board Member
 
spock345's Avatar
 
Join Date: Nov 2016
Location: Santa Cruz, CA
Default

Anything is better than the M cam.

K cams can be had relatively easily if you know where to look. Luckily forums are just such a place.

I would look at some of the Swedish cams that are out there. Enem makes good stuff.

Also don't discount A, B, V, or VX cams. All will give you something better.

140-150 to the wheels on an NA motor isn't really going to happen without some head work and/or higher compression.

I would look at the pinned NA performance and camshaft spec threads.
__________________
1967 122s, B20F, M40
1989 240 B230F (V15 cam, chipped EZK), M47 (Lost a fight with a Chevy express van)
2012 VW Tiguan 6 speed auto (oh the joys of carbon buildup).
spock345 is online now   Reply With Quote
Old 11-23-2020, 02:24 AM   #3
StreetForged
Board Member
 
Join Date: May 2018
Default

Quote:
Originally Posted by spock345 View Post
Anything is better than the M cam.

K cams can be had relatively easily if you know where to look. Luckily forums are just such a place.

I would look at some of the Swedish cams that are out there. Enem makes good stuff.

Also don't discount A, B, V, or VX cams. All will give you something better.

140-150 to the wheels on an NA motor isn't really going to happen without some head work and/or higher compression.

I would look at the pinned NA performance and camshaft spec threads.
I'll look into the Enem cams. I've read a fair bit about all the Volvo cams, and I'm not particularly interested in any of the other options aside from K and H, even if they're harder to find and more costly. No brand names come to mind for Swedish cam options?
StreetForged is offline   Reply With Quote
Old 11-23-2020, 03:59 AM   #4
SkeTchy-MechAniC
Board Member
 
SkeTchy-MechAniC's Avatar
 
Join Date: Jun 2020
Default

Cheap new H cam:
https://shop.klracing.se/sv/artiklar...-volvo-8v.html

Slightly more
https://shop.klracing.se/sv/artiklar...-klr-s_t4.html

Did you search anything yet? there are a ****load of threads about this..
__________________
Never have i ever .... Seen a 242 with two motorcycles in the back
SkeTchy-MechAniC is offline   Reply With Quote
Old 11-23-2020, 10:12 AM   #5
shoestring
Board Member
 
shoestring's Avatar
 
Join Date: Jun 2009
Location: Swampscott, 01907
Default

Enem. AGAP. KGTrimning. KL Racing. Timo's Motor.

I've got a D cam for sale. It's got some fairly aggressive duration, so it will give you a pretty strong increase at higher rpm. With your low compression ratio, though, bottom end is gonna be pretty soggy.
__________________
I AM THE MODAL AMERICAN. Planet money #936.
shoestring is offline   Reply With Quote
Old 11-23-2020, 11:37 AM   #6
SkeTchy-MechAniC
Board Member
 
SkeTchy-MechAniC's Avatar
 
Join Date: Jun 2020
Default

Quote:
Originally Posted by shoestring View Post
Enem. AGAP. KGTrimning. KL Racing. Timo's Motor.

I've got a D cam for sale. It's got some fairly aggressive duration, so it will give you a pretty strong increase at higher rpm. With your low compression ratio, though, bottom end is gonna be pretty soggy.
Don't mean to be a dick here, But i don't agree with you... Its a stock cam profile. Sure, one of the ''better'' ones but far from aggressive. Kinda overselling it my friend

Still an upgrade over the M
SkeTchy-MechAniC is offline   Reply With Quote
Old 11-23-2020, 02:08 PM   #7
shoestring
Board Member
 
shoestring's Avatar
 
Join Date: Jun 2009
Location: Swampscott, 01907
Default

It is a relative term, I won't debate it. For a 9:1 engine, though, the duration figures are a lot.
shoestring is offline   Reply With Quote
Old 11-23-2020, 02:35 PM   #8
klr142
Turbo, what?
 
klr142's Avatar
 
Join Date: May 2004
Location: OR
Default

That looks fun! What year and fuel injection?

When you say you ported the exhaust side of the head, are you saying you opened up the ports where they go into the factory exhaust manifold? That isn't actually an area you want to open up, it's just behind/above the valves that is the restriction. Same with the intake side, mostly.

The B230F intake manifold needs porting around the injectors, as far as easy port work goes for it. Otherwise, it's not a great manifold. You can get over 140whp with it if everything else is right, though.

For a factory camshaft, the K is "the best" for drifting. It's going to produce more torque and better idle/low rpm performance than the H with only minor difference in high rpm pull. The D cam will be around 5-15whp less, most likely, depending on the setup. Just remember that no camshaft is "the best". You need to match it to the rest of your setup for "the best" results.

Otherwise, a real camshaft from overseas is what you want. To make the most of any of these, you need to pull the head and shave it for more compression!

Start reading:
https://forums.turbobricks.com/showthread.php?t=354499

Oh, and I've taken out 3rd gear in an M47 with 135whp or so in my 1991 240 before. Probably from a missed shift causing a fracture at some point when drag racing, but just know that they are far from indestructible.
klr142 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 04:05 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.