Here are what some of the conversations I have with Speier Racing Heads go like, I love working with this guy!

Chad Speier:

Here is what the Brodix BB-3 XTRA O 332 flows on my bench

4.600 fixture
45 degree seat
2.300 valve w/30º BC

.100 78/76
.200 155/153
.300 231/229
.400 291/292
.500 343/341
.600 381/370
.700 402/385
.800 405/396
.900 405/410
1.00 409/414
Unlike · Reply · 2 · 9 mins · Edited


Mark Dalquist:

Are those the numbers before or after the Chad Speier magic touch? ;)
Like · Reply · 9 mins


Chad Speier:

Mark Dalquist before. They have a 90% throat.
Unlike · Reply · 1 · 9 mins


Chad Speier:

I think we should change the top cut, blend it, and tweak the SSR. Not sure I'd mess with the cuts, just hit it with a stone. They look nice to be honest.
Like · Reply · 2 mins


Mark Dalquist:

Whatever you want to do............ you aren't tied to any shackles on this, I trust your judgement.
Like · Reply · 1 · Just now

Mark and I went over the Exhaust header issues many of times and I also want 8 O2s with readouts at the dash. The headers are not going to be what is your typical CMI stuff nor built. We spent a lot of time exactly what and how we wanted and the design. Late nite phone calls for hours just about this topic alone. I remember many of times, saying to Mark we got to get the hell off the phone before its 6 am.

The 8 - O 2's will be in the non water jacketed portion of the headers.

Also for spring oilers we DID NOT want a 2 piece set up. Meaning - gasket - plate - gasket and valve covers

Mark did I have it correct ATI dampner ? I am 99 % sure about that but its the 1 percent you have to worry about. Just asking

yes on the damper but that's a pretty minor detail.

Pfaff has been running 8 O2's for years on his 655's. All you need is a spacer drilled and taped. We run 1" spacers on single engine race boats to make the valve train easily accessible. Just run copper or MLS exhaust gaskets and never have a problem.

Yes but not in CLOSED LOOP ;) very very few ECU's currently have the capability to do 8 widebands in CLOSED LOOP.................... meaning self-correcting per cylinder in real time ;) and I had looked at spacers too but as long as we are having the custom headers made, I thought why not incorporate it into the header?

Anytime you have welds in a header you end up with week spots. We try to weld on headers as little as possible.

[QUOTE=900HP;4500855]Yes but not in CLOSED LOOP ;) very very few ECU's currently have the capability to do 8 widebands in CLOSED LOOP.................... meaning self

You going to run this in Alpha/N or speed density? Or combo?

What is the thought on using 8o2 sensors? I can see on the dyno but not so much in the boat. Just asking and thanks for sharing.

[QUOTE=14 apache;4500863]Has to be brutal (impossible ?) using a MAP...unless maybe some box that connects to the 8 runners for some vaccuum....yuk. LOL.

I have a question for you, which I've asked a few times to others way back, why no collector braces in I/O's ? Like a lot of jet and V drive guys use ?

What idle do you expect to have