[RS Barn]

I had a very long and tiring week of dyno testing and cylinder head swapping. Now 20" of snow to deal with yech!



Great news: Testing and tuning of the cams worked out great. Cams are awesome. Excellent power gains in both torque and hp. Actually the big increase in torque really susprised us. All the other mods I have tested usually give a 2:1 hp/tq gain ratio. The cams had a 1:1 gain ratio. Excellent. Also peak power is still at 6500rpm. So there is an improvement across the board.

Due to the type of dyno we use I will not quote numbers yet but the 968 is putting out similar hp numbers to an early 3.6L 993 @270-275



The stage 3 cylinder head testing didn't go so smooth. Ran into two problems that will take about two weeks to prepare for testing. Fist thing we ran out of injector right away. To continue testing we tried to cheat and added a AFPR and cranked it up to 5+bar. This gave us the fuel needed for more hp but the bottom end was pig rich. With 3hrs of tweeking we got the fuel ratios close. That's when we ran into problem two. It appears the dual stage intake manifold just will not flow enough.

Porsche had a similar situation on the 993 variorum. They ended up using a dual stage manifold but also had to use a device to shorten the intake runners at high rpm. We did have power and tq increases but not as much as expected and it became clear there were areas to improve on.



The fix: I will send the stock injectors to Marren for testing and a recommendation for larger ones. I will send a prototype intake manifold to MM for mods to adapt to stage 3 head. Hopefully I can get this done in two weeks. Testing and tuning can resume very quickly at that point.

I know I'm on the right path, just isn't always easy.

Pete

Partial Post: Please Login or Register to read the full post.

[Lemming]

Pete,



Glad to see that things are moving along. With respect to the increased HP/TQ with the cams, what setup was that on (stock, stage1, 2, 3, 37??????).

Partial Post: Please Login or Register to read the full post.

[RS Barn]

Cams were with stock motor, header, airbox mod . 65,000 miles. Just like average joe. Direct bolt on.

We needed to establish they worked and were streetable before moving on to modified heads.

Pete

Partial Post: Please Login or Register to read the full post.

[Greimann]

Damn, almost makes me wish my cams were toast! Go Pete, go!

Partial Post: Please Login or Register to read the full post.

[Lemming]

[quote name='RS Barn' date='Feb 12 2006, 06:26 PM']Cams were with stock motor, header, airbox mod . 65,000 miles. Just like average joe. Direct bolt on.

We needed to establish they worked and were streetable before moving on to modified heads.

Pete

[right][post="15858"]<{POST_SNAPBACK}>[/post][/right][/quote]



93 octane?

Partial Post: Please Login or Register to read the full post.

[BruceWard]

Congrats!



If you have any charts to email please send them my way <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

Partial Post: Please Login or Register to read the full post.

[ether_joe]

*salivating with anticipation*

Partial Post: Please Login or Register to read the full post.

[JTOMA]

I cannot wait to hear more about this. As my car undergoes the transition to full race duty, this will provide a great deal of information! Keep us posted!





Jeremie

Partial Post: Please Login or Register to read the full post.

[bob blackwell]

Good job Pete, sounds like an excellent option for those who lose teeth off their camshaft sprocket and want some more power along with the repair. Keep up the good work! Bob blackwell.

Partial Post: Please Login or Register to read the full post.

[BruceWard]

Bob, Dave, I believe the cams are regrinds of our stock cams, so please do not wish they become toast. You still need the teeth or to have false teeth installed.



I have a spare head, 2 spare intake cams and a spare exhaust cam on my workbench and cant wait for an update <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

Partial Post: Please Login or Register to read the full post.

[Lemming]

[quote name='BruceWard' date='Feb 13 2006, 11:36 AM']Bob, Dave, I believe the cams are regrinds of our stock cams, so please do not wish they become toast.  You still need the teeth or to have false teeth installed.



I have a spare head, 2 spare intake cams and a spare exhaust cam on my workbench and cant wait for an update <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

[right][post="15884"]<{POST_SNAPBACK}>[/post][/right][/quote]



I have a spare motor waiting on the same news <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" />

Partial Post: Please Login or Register to read the full post.

[94SilverCab]

If you look at RS Barn webpage, there are 2 options. Cam regrinds and performance cams.



A difference in price to be sure, and a huge difference in performance...



Just my $.02



Jay

Partial Post: Please Login or Register to read the full post.

[RS Barn]

Performance Cams will be a stocked item@$1499.00. They are regrinds of originals. Yor cams can be modified @$1099.00 lwithout the sprocket replacement.

What you get are the dyno proven updated cam lobes, nitrate process and new sprockets along with RS Barn Performance Software. These will be superior to new billet cams with more durability. These are dyno tuned and a direct bolt in with correct software. No false claims just performance.

You will need to provide a core replacement. They can have good or bad sprockets.

Pete

Partial Post: Please Login or Register to read the full post.

[Lemming]

[quote name='RS Barn' date='Feb 13 2006, 08:54 PM']These are dyno tuned and a direct bolt in with correct software. No false claims just performance.

[right][post="15919"]<{POST_SNAPBACK}>[/post][/right][/quote]



Pete, by "correct software" do you mean the stock 968 software or some other software? Sorry, maybe I'm not reading this correctly, just want to make sure!

Partial Post: Please Login or Register to read the full post.

[bob blackwell]

Thanks Pete for the information and all of the work! I am sure what you mean is your RS Barn software which was developed in conjunction with the new cam profiles. Good luck! Bob Blackwell.

Partial Post: Please Login or Register to read the full post.

[kgain968]

So to simplfy this for the engine mechanical layman like me, what do I have to do to manifest my stock car (racer x chip only mod) into a 270-275 hp machine as stated above? And how much for the parts total?



Thanks!

Partial Post: Please Login or Register to read the full post.

[RS Barn]

You need RS Barn Header @$899

RS Barn High Flow cat @$299

RS Barn Performance Cam @1499(Sprockets Included and Software) or $1099(Regrind/Nitrate Only)

Airbox Mod per Grieman @$8 parts Only

"This Combo Rocks"

Pete

Partial Post: Please Login or Register to read the full post.

[ether_joe]

Hallelujah! Now i gotta start saving my lunch money. <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />



Hey Pete maybe at some point down the line you could give us the road-test butt-o-meter results? Maybe compared to a 968 turbo? Not stats, just subjective feel from somebody who's experienced both.

Partial Post: Please Login or Register to read the full post.

[kgain968]

[quote name='RS Barn' date='Feb 13 2006, 10:05 PM']You need RS Barn Header  @$899

RS Barn  High Flow cat        @$299

RS Barn Performance Cam  @1499(Sprockets Included and Software) or $1099(Regrind/Nitrate Only)

Airbox Mod per Grieman      @$8 parts Only

"This Combo Rocks"

Pete

[right][post="15928"]<{POST_SNAPBACK}>[/post][/right][/quote]





Do you also need the cat back as well to obtain 275 hp? What is the power difference between the two different cams? Can my local Porsche tech shop install all this, and how many hours do you think the labor would entail?

Partial Post: Please Login or Register to read the full post.

[RS Barn]

[quote name='kgain968' date='Feb 15 2006, 06:33 AM']Do you also need the cat back as well to obtain 275 hp? What is the power difference between the two different cams? Can my local Porsche tech shop install all this, and how many hours do you think the labor would entail?

[right][post="15982"]<{POST_SNAPBACK}>[/post][/right][/quote]

With the Header/chip/cams/airbox mod and stock cat back,actually resonator back you would have virtually the same hp.

The cat back system like a light flywheel seems to increase acceleration. Lower restriction better flow most likely are the answer to that.

Your local shop can install and time cams with my instructions.

Pete

Partial Post: Please Login or Register to read the full post.