Good job guys! Your work goes a long way to showing what TRUE HP is. Not to mention legitimate testing and tuning. Keep it up!

 

Did you ever find out if the clutch they are sending you is similar to the one i have from Devo Tuning?

 

Thanks JAM, it's not the fastest way to get to an 11.50, but we're checking every single mod for it's benefits. Quantifying the tune change benefits over the last few times to the track is going to be difficult. Installing the new clutch will show gains that should have shown up a week or two earlier. The slowly deteriorating mph should be gone as soon as the clutch is in. The issues that can't be overlooked is IF the clutch was slipping, that means that the loads hit vs rpms will be different. If higher loads are hit at lower rpms, then minor tweeks need to be made to the tune. I think we've test driven the car enough from various rpms to wot, that most of the tune should still be dead on. I'm getting anxious to test higher octane and the 100 cell cat with the new clutch. We still will be testing the lower octane 91 or 93 with another local 2006 RS, but it has a few mods. I intend to contact the owner today and see if I can supply him with 93 octane and test our base street tune first. This will give me the differences between the 2 cars, one with opened exhaust and the other being Indy's. Most of my reading logs and tuning has to happen during the day while I'm doing my other work. Makes for a JAM-packed day, but I love doing it. (pun intended).

 

Thanks Carmella, Jerry, and company I'll wear the lucky shirt the next time we go to the track .

Patrick, from what I was told this morning they all have been updated with hardened hubs .

 

Not to be like the annoying gnat at a BBQ 9sec9 but are you willing to still post up your maps?

Also are you going to just put in the clutch and then track it again? Or will the 100 cell cat be put in also before the next track date? I know you will be doing a few different maps with the cat and e85. but will it just be the clutch till the 11 second pass is made? good luck guys!

 

Yes, the maps and what fuel was used for the maps will go up, but only after Indy makes his goal. The order of next runs will be same tune but with new clutch only. Then the 100 cell cat will be added, tuned and run. Then, not sure of when, the 93 only fuel tune will be tested. Basically, the least number of parts added with the required tune to match them is still the schedule.

 

Day 7 of "clutch watch"

 

Crazy to see boost numbers considering what's done to the car.

Here is a comparision of various exhaust tube sizes. The pressure loss is when using 10' of the tube at the indicated exhaust flow rate.



Pressure drop is not linearly dependent on cross section. Which would mean that cross section does not correlate to a linear curve of HP capability. Although, if air velocity is the only thing that ends up limiting the flow capabilities, then maybe there is a linear relationship between cross section and HP potential.

I would imagine an O2 housing with an external wastegate dump would make for a large benefit on the stock exhaust.

 

awesome to see the numbers you guys are putting up. subscribed. definitely routing for you guys on this one, seein as how i'm stock right now, wouldnt mind following a similar route.

 

Still no clutch!! I cant wait any longer I want to see that 11 second pass already!

Thanks for replying 9sec9.

Is there any plans after the 100 cell cat? Still just piecing it together working out the most restricting stock pieces and replacing them one by one?

 

9sec9 seems like i should have you tune my car lol. I dunno if i've hit some limitation or im just not a good tuner (which im not excluding lol).

 

Day 8 of "clutch watch" .

 

03whitegsr, thanks for the information. Is the friction factor correct on 2.5" @ 40lbs. If so, it's the about the same as a 4" @ 40lbs, yet at other pressures, 60 & 80, the friction factor is more in line with what I would expect to see. The straight 10' pipe displays the 'theory' issue, but the only thing that's hard to quantify is the radius bends and poor connections between each section, etc. Those are some of the factors that I'm sure would help even an after market 2.5" over the stock oem unit. I doubt that the stock 2.5" exhaust is built as well as say a 3" Buschur unit. What would be really nice to see is a 2.5" mandrel bent Buschur with the 100 cell cat. The negative to that is, If you're going to change the 2.5" out, you may as well go with the 3". Not sure of weight difference between 2.5" and 3" in similar exhausts.

 

any longer and this is going to end up on Unsolved Mysteries one night

great info guys. I hope the clutch gets there ASAP

 

One more thing concerning the velocity of air. Some of my earliest posts were directly related to maintaining velocity of air flow through the head (and further). That's precisely the reason that we did mild porting with stock size valves on our earliest build when we were using the FP_Green turbo. Velocity of air in and out, of course, is critical to making power in the stock type engine builds. At least, that's what I believe.