New Project-Pushing the limits of the 2 bolt! on a Severe Budget

[Mr.3000]

Are you using OEM head bolts btw or did you switch to ARP head studs?

[wraith]

ARP=waste of money. Certain factory parts have proven not to need replacing, thats another one of them.

[rush6432]

intresting setup.....id like to see what kind of gains can be had with a mild set of cams.

[cbehnken]

Originally Posted by rush6432

intresting setup.....id like to see what kind of gains can be had with a mild set of cams.

I guess you didn't read the thread then?

[Import Power]

Originally Posted by Mr.3000

Are you using OEM head bolts btw or did you switch to ARP head studs?

Stock OEM headbolts and OEM headgaskets

So far I haven't pushed it past about 25psi, a few up to 30psi runs on the last setup (street cams)
but most runs 24psi and lower.
5027s are no where near running out of steam at this level.
I wonder what 32psi would do? Wonder is the heads and stock cams would let me get more than 602-614AWHP and 557AWTQ?

At 24psi I am only running 19-21 degrees up top.
50/50 mix of 93 octane and 110 Torco

[maTT]

Thanks for the ride

[Import Power]

Ok, so I installed Fidanza Adjustable cam gears on my car and adjusted them to +1 intake -3 exhaust.

FYI: My estimated Octane with the Race/93 pump mix was 102-103 Octane.
I think just straight 110 may yield even better results.

At wastegate pressure, 14psi, I went from 400AWHP 400AWTQ uncorrected to 425AWHP 417AWTQ.

What was amazing to me was the top end. I cranked it up to the previous max tuned 24psi. Torque was about identical, 554.4 AWTQ on stock cam gears versus 552.7. HP however went from 602.3 AWHP to 625.5 AWHP.

But that's just the beginning. The cam gears helped the stock cams/heads flow up top.

Here is the data, at 200rpm or so increments, AWHP (uncorrected) for stock gears and adjustable gears adjusted to +1 intake -3 exhaust. And yes, the car drives on the street just like the results. It used to come up on boost hard then too soon die down. Now it comes up on boost and keeps pulling hard. It used to feel like it would Come on strong then run out of steam. Now it just keeps pulling harder and harder.

Upwards of 85 AWHP more (at 7300). That is significant! We are talking about somewhere near 100 crank HP. There is probably even more past 7300 seeing how the old run really dropped off and the new run is still holding, but I knew when running the old setup power was down so I let off 7300 and about 7400 on the new run which was still at 573 AWHP

The +1-3 runs ran .5psi lower than the stock cams.

Cam
Gears RPM HP

Stock 5800 588AWHP
+1 -3 5800 610AWHP

Stock 6000 602AWHP
+1 -3 6000 624AWHP

Stock 6200 590AWHP
+1 -3 6200 624AWHP

Stock 6350 582AWHP
+1 -3 6350 625AWHP

Stock 6800 566AWHP
+1 -3 6800 614AWHP

Stock 7000 554AWHP
+1 -3 7000 606AWHP

Stock 7200 514AWHP
+1 -3 7200 588AWHP

Stock 7300 502AWHP
+1 -3 7300 587AWHP

[ajimmyjammin]

great #'s man! what your doing with your car has been very helpful. +1 for you.

[beepbeep]

+1 for bringing back her smooth sound......that's the hotness!!

[AdamVR4]

Chris, you started thinking about shift points? You're going to eventually have real fun with this car, right? Think mid to high 10's will feel slow?