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LSXr 102 manifold/oil question

 
Old 02-08-2019, 11:01 PM
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The427Kid
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Default LSXr 102 manifold/oil question

I just bought a 102mm and was wondering if I need a 102mm TB too or can I run the stock TB and just port it? Car has a BTR 3 cam and heads have been "fixed". Car also has TSP headers and off road x pipe. Love the car and my tuner has it running smooth. I plan on pulling heads soon and having them milled/ported to push for that 600whp goal. Thanks in advance for any advice/input.

Also while here, after 1st oil change I had a lot of "fairy dust" in the oil. Had it changed, ran the car a bit and pulled the filter, cut it and oil was clean. Oil pressure is 60psi+ at WOT and idles at about 30-35psi hot. Any ideas on this?
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Old 02-09-2019, 11:55 AM
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rjacobs
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The NW102 throttle body is good for 5-10 whp depending on the rest of your setup...

I wouldnt worry about upgrading it until you do your heads... At that point you will likely need injectors as well, if you arent already close to needing them anyway.
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Old 02-10-2019, 09:36 PM
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The427Kid
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You think I would need injectors at the 600whp goal? What would you recommend? I was asking if I could use the stock TB with the 102. As of now I'm leaving it off till I pull the heads to get them worked on.
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Old 02-11-2019, 01:26 PM
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mykream
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Yes, you can use the stock tb, ported or stock on the 102.
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Old 02-11-2019, 09:22 PM
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rjacobs
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Originally Posted by The427Kid View Post
You think I would need injectors at the 600whp goal? What would you recommend? I was asking if I could use the stock TB with the 102. As of now I'm leaving it off till I pull the heads to get them worked on.
When I did my initial round of mods on my 07 Z I did P&P/milled heads, headers, Halltech 108, and BTR2 cam(there was more i did, but thats all that really matters for this conversation). The tuner said I was at 92% IDC... I told him I was going to order a Fast 102 or MSD and a NW102 throttle body. He said it would be very likely with that setup that I would max out the factory injectors. SOME people are ok with running injectors at or over 100%...I am not.

The FAST uses ls2 height(tall) injectors(with an LS3 fuel rail). To use LS3/LS7 height injectors you have to use spacers, I didnt want to. That brought the options to FIC and FAST. The FAST injectors, at the time, didnt have good reviews. So I went with FIC. They have a tall injector that runs the LS3/7 plug. I want to say I went to 60lb, but might have been the 52lb version.

I would check with your tuner and see what the IDC is before spending 400 bucks on injectors. I think after injectors I was in the low 70's on duty cycle.

Last edited by rjacobs; 02-11-2019 at 09:22 PM.
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Old 02-13-2019, 09:12 AM
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The427Kid
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I'll have to see with my tuner on that. Its tuned on 93 now so I think IDC is not too high. Thanks for all the replies. Hoping to start tearing into it soon. Hopefully weather starts warming up a bit. Ready for some late night Mexico trips.
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