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what mods are needed for 300rwhp on 81 zxt?


BIGJIM

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i have a pretty stock 81 280zxt. it has an msa adjustable boost controller, adjustable pop off valve and other than that its stock. i would like to make around 300rwhp. besides a good intercooler and more boost, what will it take to get there? injectors, t-body, bigger turbo? will the stock ecu and afm be able to support the hp increase? thanks for the help.

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Guest Cronic

Stock turbo is good for about 280whp ideally. So I'd say, secondary injectors, a larger turbo, and a front mount.

 

Or, nitrous, secondary injectors (or use the nitrous solenoid for fuel) and more boost with a 50 shot. :D and an intercooler.

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Get a bigger turbo, intercooler, and better injection. Yes a stock turbo can make 280 hp, but not efficiently. I made 307 corrected, about 299 or so uncorrected on my old set-up, and expect more with the new.

 

Also, you need a 3 in mandrel bent exhaust with a straight thru muffler, I am telling you, nothing short of NOS makes as much of a difference, and it is the building block for every other mod you will do.

 

I dropped almost 9/10ths of a second in the 1/4 and picked up 7mph just changing from my sappy whatever exhaust to a 3 inch. I think I ran a 13.5@105, added exhaust, and got down to 12.8's at 112, ended up running 12.65's with DR's, and then swapped turbo's, and ran faster on pump them I ran on race before.

 

Good luck. Oh and dropping everything into a 240 will shed about 600+ pounds, which makes a HUGE difference.

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nah, im leaving it in the zxt for a while...unless i find a 240z that needs nothing but a donor motor and trans. otherwise i just dont wanna restore another car anytime soon. i love 240z's but i just dont have the desire to build another.

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i have a toyota supra intercooler i planned to use. will it work with a t3/t4, larger injectors, bigger exaust and other mods to make 300hp? or should i sell it now and get a better unit? i know i can make it fit, but i dont know if it will be efficient enough for a 300hp motor. thanks for all the help guys!

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