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[ZR1] Few ??? On performance mods....

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Old 03-30-2015, 04:28 PM
  #1  
12oh
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Default Few ??? On performance mods....

Prob going to pull the trigger on a zr1 this month and looking for a 150mph trapping highway monster! Is it safe to say that with full bolt ons and e85, the zr1 picks up about 15-20mph in the 1/4?

1) 2" headers- kooks or arh, does it matter?
2) do I need a bigger radiator? (zero track time)
3) is the stock clutch good for 750-800rwhp?
4) what should I expect to pay for blower porting, and who to use?
5) how strong is the bottem end? At what hp level does it become weak?
6) should I just port heads or use a certain vendor on exchange?
7) synergy 4.5 intake best choice or go with lpe?
Thanks, did a search on these questions and didn't find any definate answers.
Old 03-30-2015, 08:56 PM
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whatcop?
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Originally Posted by 12oh
Prob going to pull the trigger on a zr1 this month and looking for a 150mph trapping highway monster! Is it safe to say that with full bolt ons and e85, the zr1 picks up about 15-20mph in the 1/4?

1) 2" headers- kooks or arh, does it matter?
2) do I need a bigger radiator? (zero track time)
3) is the stock clutch good for 750-800rwhp?
4) what should I expect to pay for blower porting, and who to use?
5) how strong is the bottem end? At what hp level does it become weak?
6) should I just port heads or use a certain vendor on exchange?
7) synergy 4.5 intake best choice or go with lpe?
Thanks, did a search on these questions and didn't find any definate answers.
1) No
2) No
3) No
4) Talk to gkzr1
5) We haven't seen one fail
6) Port and mill and guide job. Would toss in bigger exhaust valves while you are at it.
7) Synergy is the biggest

Have your snout ported
Old 03-30-2015, 09:32 PM
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ace32x
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Did around 1100 at the wheel on my stock bottom end held up fine.
Old 03-31-2015, 12:18 AM
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mmats69
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What would the stock clutch be safely good for?
Old 03-31-2015, 05:22 AM
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12oh
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Thanks for the replys above...

Originally Posted by mmats69
What would the stock clutch be safely good for?
was my next question.
Old 03-31-2015, 08:25 AM
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Ballbearingturbo
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Originally Posted by 12oh
Thanks for the replys above... was my next question.
I had my stock clutch all the way up to 800rwhp the only reason why I switched was for piece of mind. But I never had an issue with the stocker, I also never launched or dragged the car on the stock clutch.
Old 03-31-2015, 09:20 AM
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whatcop?
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Mine failed at 750/750 with a solid 40-50 1/4 runs, 1 half mile event and about 10 road course days which totaled out with street driving to somewhere around 7000 miles on the car
Old 03-31-2015, 10:01 PM
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Cordes Performance Racing
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Originally Posted by 12oh
Prob going to pull the trigger on a zr1 this month and looking for a 150mph trapping highway monster! Is it safe to say that with full bolt ons and e85, the zr1 picks up about 15-20mph in the 1/4?

1) 2" headers- kooks or arh, does it matter? ARH will make slightly more
2) do I need a bigger radiator? (zero track time) No
3) is the stock clutch good for 750-800rwhp? roll racing yes, dig's no
4) what should I expect to pay for blower porting, and who to use? We charge $1200.00 for the blower and snout, we did Ace32x's and have countless lsa and ls9 blowers under our belt, plus Ace is the 1/2 mile record car.
5) how strong is the bottem end? At what hp level does it become weak? Ace made 1100 rwhp stock bottom end for I believe over 20k miles and it's still kicking!
6) should I just port heads or use a certain vendor on exchange? I have a core set here ported by AI
7) synergy 4.5 intake best choice or go with lpe? Synergy
Thanks, did a search on these questions and didn't find any definate answers.
If you would like to discuss any of this over pm, email, or phone please feel free to ask!!
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Old 04-02-2015, 10:36 AM
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mmats69
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Originally Posted by 12oh
Thanks for the replys above...



was my next question.
Sorry for hijacking your thread back there. I had been wondering myself what the stick clutch could hold.

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