i wouldnt put it back together without doing 12mm head studs...jmo!That plus a good set of rods and a GT3 rs crank and intermediate shaft and you can throw boost at it all day long!

 

Porting generally improves flow by reducing turbulence. You really need to know what you're doing and whether it will indeed have an effect. You have to find someone who really knows these motors and have performed flow tests. But honestly, I just want to see what I can get out this set-up with some "bolt-ons"--haha.

[quote=jhbrennan;3414676]Thanks guys. Can--I know what you mean. That's how I feel when you talk about suspensions--lol.

Welcome to the forum!

Excellent points Joe. Unfortunately, not in the budget right now. Is the GT3 rs crank journals the same size as 997t? I've been debating on the 12 mm studs, however. My heads could already be lifting a little at high boost with stock studs which one reason I'm doing this upgrade. Todd tuned this thing to the max. Hopefully my upgrade will hold the power and I'll be able to enjoy this set-up for a while. Thanks for your advice.

 

yes the journals are bigger....

 

you will not regret doing the studs...i know of a few that did their motors and wish now that they had done the 12 mm studs

 

Hi Dave, looks good but am i reading it right you're not changing pistons and so on? I mean you'll be removing those to change the rods anyway so it goes without saying you'll be changing the rings right? And pulling the engine apart and putting it back together is the main expense here. It's just seems an opportunity too good to miss really as having to back over that same old ground again at a later point only means the same parts you are changing now will be getting changed again in that process....meaning more expense again. Same goes with porting the heads. I assume you'll be removing the valves...a quick relapp, new stem seals and so on. Do it once do it right i say .

 

While I'm not in Dave's shoes, I think once you start blueprinting an engine build, you could go absolutely crazy with every internal upgrade that makes a major dent in your budget. If I'm reading him correctly and based on a few emails, I think he's got a good idea where he wants to be in terms of horsepower, and the build he is committing to should keep him safe at that level.

 

Hear what you say bob. It can sure add up indeed. Always interested to hear the details of the build list (new parts and any reconditioning work to the core parts) though. So Dave give me gory details....i promise not to be too critical

 

TTdude I like where this is going. That setup should be pretty stout to hold your e85-3076 setup probably pegging those turbos to the max making close to 1k whp! Being that Proto tuned your car to 983whp the first time and also considering that 3076 tial turbo is rated to 495whp (per turbo) that should have you flying down any track/ course that you find your self at. Awesome setup for your power limits that you currently have... Once you switch to an externally gated 35xx garret turbo is when your start wishing you had done the high rate valve springs, gt3 crank, forged rings, 12mm studs and whatever they can tweak... But I think it was you that once said that building a motor like that is just a way to chase down some more variables that can go wrong... soon enough you'll be back in business and and have no regrets for the power you seek.

Cheers

 

Thanks Bob. That's pretty much it. I'm trying to keep it simple and within my budget.

Hey Paul, No worries. Please keep it interesting! I expect no less! This build is the opposite of Slow's--lol. The shop did a compression/leak down test and everything was fine. We'll do another one when it gets reassembled. Todd K laid out a potential laundry list of internal upgrades ranging from the basic to valve springs, pistons, sleeves, larger studs, crank, etc.. It all sounds so tempting but sometimes less is more. The car is already making huge horsepower on stock motor. I don't track the car, it's not my daily driver, just a few blast offs here and there for some fun. I think these basic upgrades will provide the peace of mind I'm looking for.

Thanks Salerno. That's kinda how I'm looking at it right now. The more things I change the more chances that I'll mess something up. I think this is called Markski's Law--lol. He's been great. There are so many variables in play that I'm taking the approach of just strengthening an already very efficient motor. How's your build coming along? All the best with finishing.

 

Although unrelated to upgrades for power, have you considered doing your coolant pipes while the engine is out? Relatively cheap insurance for a well known problem, even on stock cars. Really wish I did mine when my engine was out getting this fixed.

 

Good idea Ed. How does one remove stock coolant pipes? Heat?

 

My tech went through 2 packages of the coolant repair pipes because there are other glued fittings that can be addressed.

 

^^There you go, Dave.
Salerno, those are some sweet welds

 

Some good suggestions here (especially the coolant pipes). But this is the "slippery slope" I was worried about...12mm studs (I presume that is diameter and that you have to bore out the original 10mm hole?), updated crankshaft (and why would the GT3RS crankshaft be stronger than the one on the turbo????), etc...

 

Thanks Salerno! Nice pics. You should post pics of your build. They look awesome!

Yes you have to drill a 12 mm hole but no need to update the crankshaft for the larger stud. GT3 revs higher so presumably it's stronger crank.