Yeah, I heard from shadow1 about your build and he mentioned something about the ports.

IDK, I have been an owner of a 3071 for quite a while now, I just dont have possession of it. You may understand... I have two engines invested now to make one, and the build has started. It will be a race to see who can get it in their car first, break it in and tune it, and get it on the dyno. If everything goes well, I am hoping to be done by mid-spring. If it goes well, we might make an interesting competition out of it.

If you are not being too secretive about what is going into yours, or have posted what you are doing already, let me know. I will happily divulge in kind.

 

Nothing secretive, the new motor is being built by Brian at BDC in TX. It's fully bridgeported with light exhaust/intake porting, dowel pinned, and I'm still settling on apex seals but will probably be using the Esmeril seals. I'll be upgrading the clutch to the BHR/SPEC Stage 2+ carbon/kevlar clutch. Then the boost gets pushed and we'll see if I can reach "double baller" status.

 

Sounds good.

I haven't settled on the details, but this is the working idea:

Being built by KD rotary
Cryo treated side and apex seals (MS side seals)
port and polish (no bridge)
potentially lightening the rotors, balencing the rotating parts and cryotreating internals.
Studded.

As for fly and clutch, I would like to have a lighter fly than what I have now (RB), but would like to stick with the centerforce pp. Not sure about the clutch itself. I am waffling between the semipucked clutch with a sprung center that I have now or a full puck solid hub.

I am sure that this can be done in a month or, at most, two.

I will be doing the engine pull myself, which might be an issue if it were not for the fact that I will have lots of help.

 

Join the club - my engine is being re-built now as well :

Port polish (done by me - what a PIA that is )
Esmeril seals
Stress relief of dowel pin area
Change around the injectors a bit
Might stick the Greddy IC back in

Then settle back with around 300-310whp and leave it alone for a while

later (when my wife has forgotten how much I spent on the rebuild) I'll get a new turbo and better supporting mods and start crnking it up again

 

LOL....I probably shouldnt post when I've been drinking

 

Nice man!

I think you should be able to hit Double Baller Status...

I wish I had the cash to get a spare motor and rebuild/ported by BDC. If my motor pops that's who I'm going to. But right now I'm busy saving for a complete E85 fuel system swap

 

Oh boy. Here we go...

 

I'm a little slow on the uptake but now I understand what this thread is all about.

 

all about boost

 

4 puck sprung clutch.

they are awesome.

 

Can\Will some of the newly bridgeported guys care to do some thorough tests about that kind of porting? We don't yet know if there's a real difference with a bridgeport since Chris changed a lot of things at the same time. Some flow vs boost comparison for the 2 configurations would be something, even if they'd still be the tip of the iceberg.

I'm not sure i would want a 4puck in my transmission. Our fragile transmission is already stressed by the higher torque a turbo produces, adding extra "shocks" because of the more aggressive contact may increase wear.

 

Well, Brian corrected me last night, its technically a half-bridge, but I'm more than happy to share whatever information I can get, but there will be so many differences I'm not sure how useful they will be. I'm still trying to get my car to behave properly after my fiasco with the meth controller shorting... but its getting back to where it was. I don't know if I'm going to dyno again on this motor, but its possible. My original dyno was total junk because the MAF was so badly configured and I had no functioning wastegate... its amazing to me the car was even able to do what it did, which is really props to Jeff for ******* around with it for almost 14 hours despite the mechanical problems.

If I do re-dyno on this motor it will be ~11 psi and I'll try to get flow vs. boost info. That being said, I'm really not sure I'm going to bother re-dynoing with this motor. It depends on some other things I have in the works.

I'm taking my time with the new motor though, so its possible some of you other guys will have your new motors before I get mine put in.

 

After doing a bit of porting myself and having a good look at it - to me it seems that intake bridge porting is not going to yield much . We need to do something with the siamese exhaust port to make it flow better . What , I have no idea but it is pretty obvious that that is where the restriction is .

 

You can just take it out.....

 

You could dyno it @11psi to see how well you invested your money with the new engine set-up or to do a big favor to a community
Otherwise we'll probably never know how useful it is to spend the money on a bridgeport setup.

The exhaust ports are all pretty small but i'm pretty sure as well that the siamese one may be the bigger restriction.
The fact is that, apparently, there's not enough space to modify it, even with modified exhaust sleeves.
Is anybody thinking about a solution at the moment?

 

That's what I did ,unintentionally, when it melted and broke off . Car was running sweet . But I'm not really sure how it affected flow or the side seals .....

Anyone seen a renesis on an engine dyno ? Pretty sure the centre port is the one that heats up the most ...

 

I know - I was just fuggin with ya.

 

/\ Heh - Stuff like that sometimes leads to some interesting discoveries .....

 

its really quite smooth, if you're ever in d.c., i'll show you. except for first gear, i doubt most people would notice a difference. except when you really get on it. then it shifts so much faster.

 

MM

How about giving us some thoughts on your 3082 upgrade .

IE spool up rpm ?
was it just a case of machining the housing out etc etc ?


I presume you also tried the 3076 at some stage so some feed back on that would be great as well .....

 

Each successively larger compressor raised the maximum boost threshold by 500 RPM or so.
Each successively larger compressor lowered the boost pressure by 1.5 PSI at the same amount of flow.
The '76 is just a machining job.
The '82 is proprietary.

 

Is the 82 housing larger than the 3071 - if so how did you get it in there ?
I thought the 3071 was already ram jammed in there ....

Do you still run the Greddy 50mm tube from turbo to IC ?

 

I'm not using an '82 housing.

No. Never did. Always 2.25" (58mm)

 

Hey MM . I appreciate your responses but it does kinda feel like pulling teeth LOL .
Sounds like you have done some jiggery pokery to get it in there and don't want to let on - that's fine . I was just curious.

I'm picking you make well over 400whp now - how can I convince you to show us your dyno ?

 

thanks for that - I'll make it my next upgrade ....