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Sentra Specialist
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Discussion Starter · #21 ·
Great job Mike. Set-up looks very clean. With the boosted GA would that put you in a different bracket in your ice racing competition scene?
Yes, the unstudded Street Legal Class cars are supposed to be stock. The fast ones aren't, but it would be hard to hide a turbocharger in tech, [lol]. This "stock" rule only gives the newer more powerful cars an advantage. For example, even with this small turbo setup I am still shy about 75 h.p. to a stock WRX anyway. I did take a ride up to Maine this winter to race with another club where they don't have the "stock" engine rule. I use the car more for winter rallying than ice racing now anyway. I finished fourth overall in the Vermont winter tsd rally. I'm really having a lot of fun with it! :)
 

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Discussion Starter · #22 ·
The manifold appears to be pretty good. How far down is it before the cylinders meet or pair?
Thanks Wes, I can't accurately remember how far the dividers extended into the individual ports. I'm guessing maybe 3"? Although it won't help answer your question, here's another pic of the out of the box manifold. I gasket matched, and polished the runners slightly before I installed it however.

Lastly how has it been holding up, what about ice racing?
It has been holding up perfectly, but I didn't put many miles on it this winter. Maybe 1,500 miles or so.

Pic from Vermont Winter Rally this past February with four studded Nokian Hakka-2's on it:

 

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Soon to be GA16it
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That last pic with the lights on, it is such a perfect sleeper car. Your car is a great example on how car should look and function.
 

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Sentra Specialist
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Discussion Starter · #25 ·
Thanks Guys. :)

Here's a summer pic from back when I still used the car in the warmer months.

 

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Blown, I noticed on your B12 wagon that you do not have the lower A/C bracket on your GA16DE. Is there a way to remove this without hacking at it with a cutting wheel to separate it from the alternator bracket? I need to either remove or cut apart my A/C bracket on my GA16DE to make my T25 turbo exhaust elbow clear.

I am using the TSI turbo manifold and do not have A/C if that helps.

In response to Wes's comment on the TSI manifold, I am going to be running a T25 at around stock boost with 370cc injectors, S-AFC 2, and Walbro 255 lph fuel pump. I'll give everyone a heads up on how it performs on both the GA16DE and in a B12.
 

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Sentra Specialist
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Discussion Starter · #27 ·
Blown, I noticed on your B12 wagon that you do not have the lower A/C bracket on your GA16DE. Is there a way to remove this without hacking at it with a cutting wheel to separate it from the alternator bracket?
No, I hacked mine up with a hack saw. It took quite a while! Bob LeGere originally gave me the idea to lighten the ridiculously heavy cast iron bracket. The effort is well worth it in weight savings alone.
 

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Thanks for the info. Now I just need to figure out where to hack it at, and make sure to leave enough support for the alternator and belt tensioner. Wish me luck...

I asked my friend (who previously owned my T25 turbo) about the clearance issue in regards to the exhaust elbow, and he told me my elbow is stainless steel. I think, if it is easier, I'll take it to an exhaust shop and just have them heat it up and bend it at a tighter angle to clear the bracket. I'll have to see how much they'll charge (shouldn't be too much).
 

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Yup, best way is to chop the bracket. I cut Tim's bracket right below the alternator mounting point...only two bolts remain to hold the 'new' bracket to the block, which is more than enough for an alternator. I also drilled holes randomly in the remaining portion of the alternator bracket. IIRC, I managed to knock 9 lbs off the front of the car this way.

Bob
 

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This is what forums should be about information that is needed because at a certain time we all asked questions and this thread answered many thanx. and you have one hell of a set up man good luck
 

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heck yes I cant wait to hack my bracket! 310 do you have any pics of the hacked bracket in question?
 

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Sentra Specialist
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Discussion Starter · #36 ·
heck yes I cant wait to hack my bracket! 310 do you have any pics of the hacked bracket in question?
No, but like RallyBob said a few posts ago, just take it off and cut it. When you look at it, it will be obvious where to cut it.
 

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There is one detail that I haven't finished with yet. The VTC system. Throughout all of these years I thought I knew how it worked, but I never really did until now. I always assumed that the intake cam was normally advanced for good off idle and low rpm power, and then retarded for more top end power after a certain rpm. After reading the factory manual, that's not how it works at all. To my surprise the intake cam's normal position is in the top end phase most all of the time. But under certain conditions: [engine coolant more than 158 deg. F, engine load high, and between 1,500 and 4,300 rpm's - and then again after 6,600 rpm's to keep you from blowing it up and warranty claims down] the ecu will turn the VTC solenoid on which advances the intake cam, which in turn shifts the torque curve to a lower rpm in the band. This was quite a surprise to me. I have purchased an adjustable rpm "window" switch and will connect it shortly to turn on the VTC briefly between 1,500 and 4,000 or so like the factory did. Who knows, maybe it will spool the turbo quicker. I'll let you all know how it works out, but frankly I'm not expecting much from it.
How did this turn out?
 

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Sentra Specialist
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Discussion Starter · #38 ·
How did this turn out?
This is my winter car and it is currently off the road until late November, so I won't know until then. But like I said, I'm not expecting much from it. It runs fine without having it connected.
 

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Discussion Starter · #40 ·
It's winter. I'd like to hear some updates!
Yes winter's here. Nothing to update yet as I just got the car out of storage yesterday. Got a late start this year. I've got to get some general maintenance things done first before any more tuning is done. Like I said a few posts ago in this thread, I'm not expecting much from the messing with the timing of the vtc system.

Looking forward to 4WD and boosting again this winter though! Especially with $2.00 a gallon premium. :thumbup:

Mike
 
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