Forged pistons & turbo lag reduction
09-11-2014, 11:54 AM
#1
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Forged pistons & turbo lag reduction
I have a 1997 miata 1.8L & I plan to get a Garrett GT2860 from BEGI, I plan to run it at it's full potential (12psi) but talking to a specialist he mentioned that the turbo is a bit too big so there would be some turbo lag & I was thinking of purchasing CP forged pistons 84mm 9:1 compression set, I already bought a lightweight flywheel & lightweight crank pulley, what do you guys think? Is CP forged pistons a good brand? (Btw this is gonna be my daily car I plan to race it at least 20% of the time) Is increasing the bore size gonna help? Any other ways to reduce turbo lag?
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09-11-2014, 12:03 PM
#2
I think you have no idea what you're doing.
but I'll be nice and help you anyway:
to reduce turbo lag you want to run a properly sized turbo and have the least amount of restriction in the exhaust and charge air path. Properly sized turbo is the smallest turbo that will reach your hp and tq goals, and least restriction means good hotside parts and good charge side path, intercooler flow, and IM flow.
Before you make n00b mistakes with a build/setup, I suggest doing way more research.
PS: sure, overboring and running bigger pistons will get you to 1.9L, and will help, but not nearly as much as what I mentioned above.
but I'll be nice and help you anyway:
to reduce turbo lag you want to run a properly sized turbo and have the least amount of restriction in the exhaust and charge air path. Properly sized turbo is the smallest turbo that will reach your hp and tq goals, and least restriction means good hotside parts and good charge side path, intercooler flow, and IM flow.
Before you make n00b mistakes with a build/setup, I suggest doing way more research.
PS: sure, overboring and running bigger pistons will get you to 1.9L, and will help, but not nearly as much as what I mentioned above.
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09-11-2014, 12:05 PM
#3
It's all in your plans and how much power you want. You mentioned a GT2860 at 12psi, which should be around 250whp. If that's your power goal, you'd be better off with a GT2560 that's easily capable of that power and will spool a good bit faster.
If you want to push the power a little higher, toward 300whp, then the GT2860 or GT2871 and a built motor is probably a better option.
If you want to push the power a little higher, toward 300whp, then the GT2860 or GT2871 and a built motor is probably a better option.
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09-11-2014, 12:20 PM
#5
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Man, you guys are getting soft in your old age! Giving good advice, with no insults?
OP, you hit the jackpot of people in a good mood for some reason... take their advice as a gift from the gods!
Keith
OP, you hit the jackpot of people in a good mood for some reason... take their advice as a gift from the gods!
Keith
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09-11-2014, 12:28 PM
#6
but talking to a specialist he mentioned that the turbo is a bit too big
so there would be some turbo lag
& I was thinking of purchasing CP forged pistons 84mm 9:1 compression set,
I already bought a lightweight flywheel
& lightweight crank pulley, what do you guys think?
Is CP forged pistons a good brand?
(Btw this is gonna be my daily car I plan to race it at least 20% of the time) Is increasing the bore size gonna help?
Any other ways to reduce turbo lag?
Reply
1
1
09-11-2014, 05:23 PM
#18
http://www.nytimes.com/2014/08/03/au...view.html?_r=0
20psi, sorry, it appears I was incorrect.
20psi, sorry, it appears I was incorrect.
But the Fiesta, like the Porsche 911 Turbo, can also allow a temporary overboost, raising maximum boost to 20 p.s.i. and generating 148 pound-feet of torque for as long as 15 seconds.
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