I vote or E85 so we can see precisely what kinds of gains you net and for those folks who need a base map with E85(even though I don't have an evo...yet)

 

the base map for e-85 would be great and i'm sure it would come with time.

 

Test pipe and 100 octane seems to be the best option according to your theme so far. Total cost $50-75 bucks?

The cat can always go back in, just like putting your spare tire and jack back in the trunk! I've also noiced that 100octane gives the stock injectors a little room to 'breathe'.

 

+1
I'd say ditch the cat first. That would more along the lines of what most people could or would do. Good luck either way.

 

I vote e85 simply because most people know how to tune a tp swap.. The community will get more from the e85 maps imo. Plus most people here that are serious about anything aren't going to be drag racing a car on pump. Sure many will, but the pluses of e85 tuning info far out weigh that of a testpipe swap.

 

Another vote for switching to E-85. The tuning information gathered from that change would be really interesting to see.

 

OK, since Indy put it out there, I'll vote too. First, I'd like to swap out the cat for the test pipe and see what it does. Then, do an E85 tune with the cat, then remove the cat and do a test pipe/E85 tune. I think with that test order, we'll be going UP the power ladder with each tune. With the car being so consistent, we should be able to see results with each outing. At this point, not including the clutch, the injectors can be purchased for $100 and the test pipe is approximately $100 or so. That would make the two changes only $200 more for all 3 of the new tests. To recap my vote: 1=test pipe added, 2=Put cat back on and add E85, 3=remove cat and leave on E85.

added: By the way, should we also add the SS O2 housing, or not at all?

 

It hasn't been said, but after each track day, Indy swaps his 93 octane/26.5 street tune back into the car for daily driving. Although his track tune is also 26.5 psi, to achieve 26.5 at the track, he has to turn the mbc up by a few turns. The reason for that is "Roll On" loads are always higher, gear for gear, than you will see at the track. We're also pushing the timing and fuel a little more at the track than we are on his normal street tune.

 

I vote D non of the above.. I vote port the hotside and exhaust manifold. Then we can get an idea of what kind of power can be made with a $25 bit and elbow grease.

 

ssteve, I actually still have my stock ported manifold, I think. I may have given it to Mac214 for his autocrosser. I'll have to check.

 

ssteve, another reason we've hesitated on the manifold is that we think the cat may be the single biggest restriction in the exhaust. If it is, other changes will be limited in effect, due to the cat restriction. Any thoughts by anyone?

 

vote for e85.. I'm trying to get my car switched over to it at the moment.. if I can ever get injectors.. and get all installed and tuned.. been waiting months..

 

lucky evo, you're in OKC?

 

yes sir..

 

We're in Edmond. Maybe we could meet up sometime and just shoot the sheet.