i have purchased skunk 2 stage 2 cams gears springs retainers and valves
and was also thinking about a supercharger but do not know if the cams are good for supercharging.
can someone help me out with this problem
thanks

 

Bad cams for FI.

 

no...they are NA cams. in fact there was some idiot here in town that has a turbo lsvtec and he put these cams in....once vtec engages, the car just stutters and dies.

 

thanks for the tip guys
u saved my motor

 

do you want to sell those cams??

 

if i can sell them for 700 maybe

 

trade the intake cam for a skunk2 stage 1 intake cam and boost on it all day
252 duration Sk2s1IN 11.5mm lift/262 duration Sks2EX 11.8mm lift
as long as the duration is biased toward exhaust duration you are good
to go you can make power on larger cams as long as the exhaust cam
can work efficiently. I know of a engine builder in FLA that uses the GSR intake
cam and the ITR exhaust cam and tunes another 2 lbs and 20-30 more whp
from the JRSC setup using this method. I havent heard of this working with
the skunk 2 cams, however I wouldnt doubt that the same theory would apply here.


[Modified by MikeSarr_GSR, 9:32 AM 10/12/2002]


[Modified by MikeSarr_GSR, 9:32 AM 10/12/2002]

 

The only reason it would sputter and die is because he didn't take into effect that with added air you need added fuel. Can we say stupid? Larger cams do work it's just they are not optimized for the flow rates of FI and their overlap is either to large or too small and the turbo and s/c favor different cam profiles. So in theory you could run larger cams if you get a proper overlap and the right amount of fuel.
I believe my theory is valid but I'll have to try it sometime. The only problem I can see is the power adder not being able to keep up with the air flow or being put under enormous strain. Remember the old turbo F1 cars they worked with crazy cam profiles that wouldn't work at all N/A they wouldn't be able to pull in enough air fast enough for proper combustion and would flood.

 

if you were interested i would trade you my stage one cams and some cash.. they would work alot better with your setup..

 

i read a post a while back saying that fi dont like high overlap cams. if you notice the specs on the crower turbo cam its actually milder than on the stock cams.

 

Too much overlap with the Skunk2 Stage 2 Cams when you're goin FI.


Stage 1's would work better, but still too much Overlap for FI unless you do it perfectly.


I would go for ITR or CTR cams. I know a dude who has ITR cams and a JRSC in his GS-R who pulled ~ 230wHP!

 

ITR/CTR Intake, Skunk2 Stage 1 exhaust would work also.

 

Hey MikeSarr_GSR, I am very interested in what kind of cam set up to use with my JRSC. Who is this builder/tuner in FLA that you mentioned?

Also thanks to everyone else for all the information. My problem is that I'm getting so many different opinions. I'm not a total noob, but tuning cams to work with a supercharger is over my head. Where could I go to read and research the issue for myself? Anyone know of any magazine articles or tech manuals on this issue?



[Modified by fredtoast, 5:07 PM 11/21/2002]

 

his name is John Wilson at LHT Performance Tuning. They are on the west coast of FL near Tampa. He has a B18B powered JRSC CRX with 277/212 a the wheels,
GE Sleeved
85mm bore/92mm stroke (B20 crank)
10.5:1 pistons
JRSC with big pulley however it only generates 6lbs due to the larger
displacement
kamikaze header, endyn catch can his own carbon fiber CAI with AEM intake
Z-Dyn Computer (I think)
550cc RC balanced injstors with holley fuel pump, AEM rail and pressure reg
B16a head
GSR intake cam
ITR exhaust cam
tuning... jedi stiff there
USDM ITR tranny

all this in a CRX with full ITR interior... absolutely freaking perfect car.
I think he also still gets about 22mpg around town

 

the b20 crank is 89mm same as the ls...the 90-91 b20 crank is 95mm

displacement has nothing to do with the jrsc

and he did the hydro tranny conversion?

 

I must have been thinking about the B20A3 that I used to own. Well, displacement does have to do with something if you think about it. CFMs and demand based on displacement will determine the amount of volume that the engine inhales/exhales. Thats why turbos and blowers are sized differently for different motors. That was his explaination. Yes and there was an LSD stamp on his tranny. If you Email ITRChris you can get images of the car that I shot. I havent seen em yet.