Spec Jay's BPv2 Street/Track Build

Elmo370z · 01-16-2021, 11:11 PM

Quote:

Originally Posted by Spec Jay

Finally was feeling comfortable enough to participate in Global Time Attack, best of all it was the first time GTA would be at my home track! Had some issues with tech but was eventually allowed out on track on the second session

Unfortunately it was the first time the Z has left me completely stranded too.
On my first session out just 4 laps in the motor blew at the end of the front straight doing 150+ (Code Brown anyone?

)Some pictures of the carnage.

Ended up finding 5 or 6 holes in the block after pulling it.

I can't say I was disappointed or depressed about the engine, it took 5 years of 500+ WHP on a virgin block without a problem.

My issue was I was on year old scrub 275 Nexen SUR4G (Excellent tire BTW) instead of the 295 Advan A052's I had waiting to go on the next day. I was holding out better weather on day 2 as it was raining every other session all of Saturday. I was able to manage beating my PB on that 4th lap with a 1:50.775 and was barely settling into the new suspension setup. The lap was Good enough for 4th at the time but after the weekend settled 6th.

Good news is, GTA will be returning to Ridge Motorsports Park in 2021!

That’s impressive the motor lasted 5 years of pounding. You have any idea what the old temps were like? I’m thinking about adding a second oil cooler to keep things cool. I was looking into the g30-900

Spec Jay · 01-17-2021, 12:33 AM

Quote:

Originally Posted by Elmo370z

That’s impressive the motor lasted 5 years of pounding. You have any idea what the old temps were like? I’m thinking about adding a second oil cooler to keep things cool. I was looking into the g30-900

Yeah I was impressed, I did a leakdown and compression test before this season and the motor was healthy. Old temps I would have the coolant pinned after 2 laps. Oil wasn't far behind.

Just a heads up, G series turbos only come in v-band turbine inlet non divided for whatever reason, you welding a different flange on?

Elmo370z · 01-17-2021, 12:57 AM

Quote:

Originally Posted by Spec Jay

Yeah I was impressed, I did a leakdown and compression test before this season and the motor was healthy. Old temps I would have the coolant pinned after 2 laps. Oil wasn't far behind.

Just a heads up, G series turbos only come in v-band turbine inlet non divided for whatever reason, you welding a different flange on?

Lord. I hoping the ron Davis Rad and twin oil coolers help with temps. I’m going to have mamotorsports do there magic

Elmo370z · 01-17-2021, 01:28 AM

Quote:

Originally Posted by Spec Jay

Yeah I was impressed, I did a leakdown and compression test before this season and the motor was healthy. Old temps I would have the coolant pinned after 2 laps. Oil wasn't far behind.

Just a heads up, G series turbos only come in v-band turbine inlet non divided for whatever reason, you welding a different flange on?

Another guy I been talking to is going to install a 2 gallon swirl
Pot to see if that helps with heat soaking issues.

Spec Jay · 01-17-2021, 02:02 PM

Quote:

Originally Posted by Elmo370z

Lord. I hoping the ron Davis Rad and twin oil coolers help with temps. I’m going to have mamotorsports do there magic

Quote:

Originally Posted by Elmo370z

Another guy I been talking to is going to install a 2 gallon swirl
Pot to see if that helps with heat soaking issues.

Well after the vent work and relocation my coolant issues were non existent with the factory radiator. One thing to note is the 6266 is not water cooled though.
You can see where I moved the oil cooler in this pic, it's just the 30 row that came with the BP kit. Ducting will be your friend combatting temps!

Elmo370z · 01-17-2021, 05:16 PM

Quote:

Originally Posted by Spec Jay

Well after the vent work and relocation my coolant issues were non existent with the factory radiator. One thing to note is the 6266 is not water cooled though.
You can see where I moved the oil cooler in this pic, it's just the 30 row that came with the BP kit. Ducting will be your friend combatting temps!

Exactly where I’m
Moving my oil cooler. Yeah I’m going to duct the front end of the car if my budget allows it. Do you recall your oil temps with the new relocation?

Spooler · 01-17-2021, 07:29 PM

Quote:

Originally Posted by Elmo370z

Exactly where I’m
Moving my oil cooler. Yeah I’m going to duct the front end of the car if my budget allows it. Do you recall your oil temps with the new relocation?

You need the Stillen front bumper so you can put your oil coolers outboard. It is not possible with the FI TT kit due to our intakes already being there.

Elmo370z · 01-17-2021, 08:04 PM

Quote:

Originally Posted by Spooler

You need the Stillen front bumper so you can put your oil coolers outboard. It is not possible with the FI TT kit due to our intakes already being there.

I’ll make the existing bumper work. With the FI kit you can still make it work. Fab work isn’t a big deal with Brian

Spec Jay · 01-18-2021, 07:16 PM

Quote:

Originally Posted by Elmo370z

Exactly where I’m
Moving my oil cooler. Yeah I’m going to duct the front end of the car if my budget allows it. Do you recall your oil temps with the new relocation?

I think the most I saw was around 240? That was really getting after it though. This newish motor I dropped in I have the OEM cooler and dropped down to a 25 row so we'll see how it handles this time around.

I actually have a new duct that has brake inlets that I need to throw in, fits between the intercooler and the ends of the main inlet.

Hotrodz · 01-18-2021, 09:24 PM

Quote:

Originally Posted by Spec Jay

I think the most I saw was around 240? That was really getting after it though. This newish motor I dropped in I have the OEM cooler and dropped down to a 25 row so we'll see how it handles this time around.

I actually have a new duct that has brake inlets that I need to throw in, fits between the intercooler and the ends of the main inlet.

240* is pretty damn good. That is way in the safe zone. Many racecars run at 260* to 280* without much problem. The issue with our cars is stay with the factory ECU which pulls timing and will put you into limp mode at 265*. Good motor oil which we all run doesn't even start to break down or become an issue until well over 300*. The real issue with heat is water temperature and with oil it is oil pressure. I don't recall ever reading about an engine letting go because of oil temps but because of oil pressure and extreme water temps. My temps are high(260* max) on the most small tracks from a mile to about 1.5 miles which require a lot of shifting, running on the rev limiter and short straight aways that don't allow for good air flow to aid cooling. Oh and then that can be compounded by running in traffic as well. All of those things lead to heat soak which is a performance killer and the over all impact could be catastrophic.

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