Recently I had a chance to play with a Jun Type II Intake Cam. After hearing good things about this setup and being bored one saturday afternoon I decided to give it a shot, here are some dyno graphs, the explanations of them are below them, here is the engine setup:

'96 gsr block with .025" overbore itr pistons
stock 3 layer headgasket
itr head
itr intake manifold
titan motorsports cam gears
accel 255cc injectors
dc jdm ceramic 4-1 header
thermal catback
overbore civic si throttle body
chipped p28 with vtec x-over at 5200 rpm
b&m fpr and gauge



This graph shows the extra power that can be gained by simply tuning your engine. Blue is untuned, red is tuned. These runs were done with stock itr cams both intake and exhaust. Tuning was done via playing with cam gear adjustments, timing adjustments via the distributor, and fuel pressure adjustments.



This graph shows fully tuned versions of this engine with the itr intake cam vs jun type II intake cam. The red line is the jun type II intake cam, blue is stock itr intake cam. As you can see the peak power between the two is pretty much about the same but is the gains in torque and power all across the band that impresses me the most, pretty consistent gains all across the rpm range.



This graph just shows my power from when i started playing with the cams from a baseline to the final pull. Red is the fully tuned Jun Type II intake cam. Blue is the untuned itr intake cam. Nice gains for an afternoons worth of work imo. Peak HP gain was 9 hp and peak torque gain was 7 ft pounds of torque.

Is this cam worth the $440 retail price tag? depends - if you are looking for consistent gains and have some extra cash laying around to buy it and tune the cam then yes i would say so. But also remember these power numbers were with dyno tuning as well, if you can't get your car to the dyno to get it tuned then it probably isn't worth it to just throw one of these cams in and expect power. Personally, I would recommend this setup, not too expensive and here are proven results - also remember i sold my stock itr intake cam for $200 so that helps with the cost as well

Special Thank to Darin Dichiara (aka willis) for his time during the testing.


Modified by TitanMotorsports.com at 9:57 PM 10/23/2003


Modified by TitanMotorsports.com at 10:08 PM 10/23/2003

 

nice test

 

Nice test, but i think you would have gained more from the JUN 2's if you had a stand alone, nevertheless still a good test

 

Did you dial in the ITR cams for this test? The hp ratings for the ITR set up look kinda low.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hemi Ram &raquo;</TD></TR><TR><TD CLASS="quote">Did you dial in the ITR cams for this test? The hp ratings for the ITR set up look kinda low. </TD></TR></TABLE>

Dyno Run .026 was with the itr cams fully adjusted via cam gears adjustments, fuel pressure, and timing giving the most horsepower and torque we could extract

 

Thanks for the infromative write up but are those a/f ratios correct? It looks like you are running seriously lean in some areas. Notice too that all the most powerful pulls are lean.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by glagola1 &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for the infromative write up but are those a/f ratios correct? It looks like you are running seriously lean in some areas. Notice too that all the most powerful pulls are lean.

</TD></TR></TABLE>

yeah it is running a bit lean but that is where it was making power, richen up the fuel and lost consistently all the way through - we made about 45 dyno pulls and i have had it to the track 3 times since then for a total of about 15 runs and haven't had any issues yet - checked the plugs regularly no signs of detontation and no pinging heard - car is always run on 93 octance - but my theory, if it blows it just gives me a reason to build something bigger and better

 

Cool, cool... how/when was 5200 vtec x over determined? It looks great, im just wondering since stock itr is usually at 5600.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hemi Ram &raquo;</TD></TR><TR><TD CLASS="quote">Cool, cool... how/when was 5200 vtec x over determined? It looks great, im just wondering since stock itr is usually at 5600.</TD></TR></TABLE>.

It has a chipped p28 ecu and the chip determines that Vtec X Over is at 5200 rpm

we actually tried another program chip with a 5800 rpm Vtec X Over and that one wasn't even close to this setup - we made about 8 runs with that chip tuning in between and couldn't even get close

 

hondata?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hemi Ram &raquo;</TD></TR><TR><TD CLASS="quote">hondata?
</TD></TR></TABLE>

No, just chipped ecu, 5200 rpm vtec x over is a mugen program - 5800 vtec x over is a skunk2 program

mugen program excelled on my engine setup

 

Cool. Thanks for sharing the info and props on the tuning work.

 

hey titan:

i am about to be building my head i was thinking of junII in and ex cams,jun cam gears,spoon headgasket,skunk 2 ti retainers,portflow b series dual valve springs,skunk 2 intake manifold,spoon 65mm t/b, do u think the jun II cams would be a wise purchase for my b16 with this setup? or should i just get the JUN III's? and run those until i can build my block?

 

all depends on what compression you will be at - over 11.7 or so i would recommend the jun type III's - under that run the type II's - here is a dyno graph showing my car vs my buddy's car - pretty much the same setup only he has a gsr head, our compression ratios are pretty close and he is running the jun type III's - as you can see i pretty much whoop up all over him up to 8k rpm - over that he is making the power - my car is red line, his car is blue line:

 

Good stuff. Dyno graphs are always good to look at, tells you about the whole powerband. Feel free to post more up.

 

very impressed. you guys do really good work and a lot of research. maybe some h22 work in the near future?

 

what year itr cams were they?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by specie &raquo;</TD></TR><TR><TD CLASS="quote">Good stuff. Dyno graphs are always good to look at, tells you about the whole powerband. Feel free to post more up. </TD></TR></TABLE>

yeah definatley - it is good fun to me - i will keep posting them as i make changes or re-tune the car

james

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by junbb1 &raquo;</TD></TR><TR><TD CLASS="quote">very impressed. you guys do really good work and a lot of research. maybe some h22 work in the near future? </TD></TR></TABLE>

we have a good friend that has a fully built all motor h22a - i will see how he feels about me posting info about his setup

james

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOLDBERG &raquo;</TD></TR><TR><TD CLASS="quote">what year itr cams were they?</TD></TR></TABLE>

'98 itr cams

 

nice gains, i think it was Mike K that did a test like this also. JUN 2 intake cam with ITR exhaust cam and he came up with similar results.

 

I wonder how much better a 99-00 itr/ctr cam would be vs those results.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 2 NV &raquo;</TD></TR><TR><TD CLASS="quote">nice gains, i think it was Mike K that did a test like this also. JUN 2 intake cam with ITR exhaust cam and he came up with similar results.</TD></TR></TABLE>

yeah, that is where the idea came from to try this setup

 

Try some type 3's.......Bet youll get pretty damn close to 200whp......hell they are the main reason my b16a made 195whp!!!!Jun products

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nasi &raquo;</TD></TR><TR><TD CLASS="quote">Try some type 3's.......Bet youll get pretty damn close to 200whp......hell they are the main reason my b16a made 195whp!!!!Jun products </TD></TR></TABLE>

i don't think the type III's are worth it in my setup because i am not running very high compression - as you can see in the independent graph that i posted showing my results and my buddies results that has the type III's in his engine and about the same compression i pretty much shiite all over him all across the band up to 8k rpm