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CI for a boosted motor

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Old Dec 14, 2014 | 07:27 PM
  #21  
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Originally Posted by Detoxx03
Plan on running methanol injection? Also what fuel do you plan on running?
Might have wanted to ask that before suggesting a CR?? I assume 91 or 93 for anyone asking as I don't know anyone that runs race fuel all the time. And yeah you can do the higher CR without a ton of issues, but when offering advice I alway have to add the unknown factor of who's tuning and building it. How safe are they going to tune or vice versa. Since his goal was not shooting for the moon I use a safer lower CR to compensate for any lack in tuning skill and it wont cost him any power to talk about. N/A motors is about 5% per point of compression. I have always run lower CR than what most run and it hasn't ever seem to cost me any power. The 975rwhp I made on the 346 was 7.8:1 because it was parts I had laying around. But typically my cars have held up longer at higher hp levels than most and I believe it to be one of the reasons. Most of the times they have broke was a random reason like the last tmie I pushed the sleeves down in a block that was done by an unknown person etc... Carry on with the tech advice I usually don't have time for it anymore and haven't been doing it in a long time.

GL with your build bud probably can't mess that up with the reasonable goals you set with a relativly large blower.
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Old Dec 14, 2014 | 07:35 PM
  #22  
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Originally Posted by Inspector12
Might have wanted to ask that before suggesting a CR?? I assume 91 or 93 for anyone asking as I don't know anyone that runs race fuel all the time. And yeah you can do the higher CR without a ton of issues, but when offering advice I alway have to add the unknown factor of who's tuning and building it. How safe are they going to tune or vice versa. Since his goal was not shooting for the moon I use a safer lower CR to compensate for any lack in tuning skill and it wont cost him any power to talk about. N/A motors is about 5% per point of compression. I have always run lower CR than what most run and it hasn't ever seem to cost me any power. The 975rwhp I made on the 346 was 7.8:1 because it was parts I had laying around. But typically my cars have held up longer at higher hp levels than most and I believe it to be one of the reasons. Most of the times they have broke was a random reason like the last tmie I pushed the sleeves down in a block that was done by an unknown person etc... Carry on with the tech advice I usually don't have time for it anymore and haven't been doing it in a long time.

GL with your build bud probably can't mess that up with the reasonable goals you set with a relativly large blower.
That's mg fault for not asking first. Thought it was listed and decided to ask when I went back. Honest mistake on my part. With that said the compression I suggested is safe on pump with the timing low. If the OP is self tuning and a novice lower would help. Like you stated as well as myself that headunit will meet his goals easily. :thumbs:
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Old Dec 14, 2014 | 07:52 PM
  #23  
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Originally Posted by Detoxx03
That's mg fault for not asking first. Thought it was listed and decided to ask when I went back. Honest mistake on my part. With that said the compression I suggested is safe on pump with the timing low. If the OP is self tuning and a novice lower would help. Like you stated as well as myself that headunit will meet his goals easily. :thumbs:
Yeah we need some of you younger guys to step up and be the ones to ask as us old farts just running out of time and patients to answer the same questions over and over again, but wanted to offer you a little insite to my train of thought for ppl asking advice, as not everyone is like me or even you and is shooting to push the limits etc... So finding out what they are trying to do IE: power goals, plans for the car etc... are a critical piece when doing it. But you've been doing good, I read your post when I'm trolling.
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Old Dec 14, 2014 | 09:05 PM
  #24  
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Hell I have stuff I wanna write in my head and it doesn't always translate on here until I edit it. I definitely try to help with what I'm familiar with. Rather give no advice than bad advice.
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Old Dec 15, 2014 | 08:05 AM
  #25  
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Would u use twin 340 pumps or would u use a magnaflow 750 with a boost-a- pump? I planed on using 96# injectors ,think I need to go higher or lower ?
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Old Dec 15, 2014 | 01:48 PM
  #26  
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The 340's will do the job. I'm currently running a set of FIC 80's but probably gonna do the Bosch 127's or FIC 2000's if I do the flex fuel sensor.
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