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944S2 16v 3.0 E85 MS3PRO 6662 build. Plus questions.
Ok everyone, I started my 3.0 16v turbo build. The 944's setup is going to be changed from drift back to a Street/ Land Speed style car(Standing mile/ rolling 1/2 mile), The reason for this is I tagged the back of the car on the wall last event and unlike my old Nissans I realized I cared too much about this car to do that.
So I decided since I've never owned anything REALLY fast why not go ahead and boost the 3.0 16v, seems common to see fairly high numbers on relatively low boost, 400hp around 1-1.2bar. E85 is extremely common here in Kentucky and will be the fuel used.
To start it all off, I knew from other threads that you pretty much have to buy or make a shorter runner box plenum manifold, So I snagged a factory s2 intake off ebay with a broken throttle tab.
Also ordered a 6662 turbo with a .82 divided t4 housing with 3" v-band outlet.
I will be trying to run it full twin scroll if there is room for all the tubing.
And this is how the engine bay sits now.
So now the questions...
I've been reading alot of the 16v turbo builds and the common theme is the turbo still goes in the stock 951 location. My questions are that there doesn't appear to be the room for a decently sized turbo there. What is done with the oil separator/dipstick, and what are you using for a brake booster?
Thanks everyone for the knowledge in advance,
-Austin
nobody seems to have any issue with the brake booster or M/C, the AOS is usually kept as well unless someone goes with a drysump oiling system. AOS sometimes gets complimented with an external catch can for safety.
I guess my biggest hurdle right now will be mount the turbo via brace in a good position then proceed with building intake and exhaust manifold and downpipe... I need to move some of the wiring in that area and figure out everything I can do away with in the bay right now.
I have a extra catch can laying around, thanks for the recommendation.
Kinda seems like you've jumped in with a few parts or concepts pretty early.
So is that the engine in it's place now and you're going to make up intake, headers, X over (twins), exhaust plus a ton more things? If so, what is the build spec of the motor. Pistons/rods/ compression / cams / oiling / cooling etc... A lot of things to think about.
btw...if you are after a set of custom coated headers for 16v turbo I have a spare set. Never been used. No good for 2x X overs though. Hence we had to make another set up. Note avatar.
333pg333 The engine in the car is the engine being used and its in position. Its a Standard 3.0 16v internally with all of the typical maintence done, I'm going to get the car running on low boost and build another engine once all that is sorted.
As for oiling, a dry sump is out of the question right now so hopefully a good oil cooler and frequent oil changes will keep it together.
Cooling wise, Im tubing the car from the strut towers forward to gain room for a bigger radiator, oil cooler and intercooler. Also adding a hood vent to try and help flow out.
So you're running 11:1 c/r with stock rods/pistons and a massive turbo. No matter how good E85 is, with that c/r you won't be able to throw tons of timing at it to help spool the turbo. You'd be much better running a smaller turbo if you're not going to build a more suitable forced induction motor. Or buy some rods/pistons to run lower c/r from the get go.
So you're running 11:1 c/r with stock rods/pistons and a massive turbo. No matter how good E85 is, with that c/r you won't be able to throw tons of timing at it to help spool the turbo. You'd be much better running a smaller turbo if you're not going to build a more suitable forced induction motor. Or buy some rods/pistons to run lower c/r from the get go.
Noted, would you recommend sleeving or drop in pistons? the bores are very nice.
Noted, would you recommend sleeving or drop in pistons? the bores are very nice.
Ive built a few nissans and volvos in the past. But im very new to to the 944 chassis, im just going by what ive seen and what I've learned feel free to set me straight when im wrong or going the wrong direction
Just know you need to be MUCH, MUCH more careful with tuning the 944 engine than those you've done in the past. The bores are SO MUCH bigger that you have to be very conservative with timing.
944 engines can make big power simply due to the capacity of the engine, but going with big boost and timing that a KA24/SR20 or Redblock would laugh at will blow your 944 engine.
SR20 has an 86mm bore...the 944S2 is 104! SR bore spacing is 97mm, a basic 2.5 944's BORE is 100mm!
These things are tractors compared to what you're probably used to.
In your specific engine the pistons are "OK" for boost but the connecting rods are overbuilt pieces of spaghetti...either go very low boost/very conservative tune or tear down the engine and put in 944T rods at the very least.
Just know you need to be MUCH, MUCH more careful with tuning the 944 engine than those you've done in the past. The bores are SO MUCH bigger that you have to be very conservative with timing.
944 engines can make big power simply due to the capacity of the engine, but going with big boost and timing that a KA24/SR20 or Redblock would laugh at will blow your 944 engine.
SR20 has an 86mm bore...the 944S2 is 104!
In your specific engine the pistons are "OK" for boost but the connecting rods are overbuilt pieces of spaghetti...either go very low boost/very conservative tune or tear down the engine and put in 944T rods at the very least.
Thanks for the advice... looks like shes getting torn down, might as well build it if I do...Has anyone thoroughly tested the hybrid stroker? Aluminum 4g63 rods are available in standard lengths... maybe they could help with reciprocating masses and cushion the blows at high hp.
06-11-2017, 06:06 PM
944S2 16v 3.0 E85 MS3PRO 6662 build. Plus questions.
maybe they could help with reciprocating masses and cushion the blows at high hp.