Is it really worth putting a Cold Air Intake on 370z and what HP gains

Threadlocker

I had a 1983 280zx turbo that never had turbo problems. Ran for 243k, 100k was spent at 8PSI on the stock turbo (Garret TB03) with intake (K&N custom CAI) and exhaust (custom DP-back 3" mandrel bent).

I had a 1988 Toyota Supra Turbo with 212k when I sold her after running 70k on the stock CT-26 turbo at 12-13psi. K&N cone intake, Lexus MAF, 3" mandrel bent DP-back. I never had any turbo problems and the most extensive repairs I ever did on the car was replacing the headgasket on the 7mgte.

I don't believe the reliability or the longevity of the motors of these vehicles were compromised by the K&N filter or modifying the turbos. Both of those cars were overboosted and ran that way for over 50k. If there was a drop in power, it's possible I didn't feel it, but the track numbers didn't change, and they certainly didn't get replaced.

And just for an apples to apples story - my brother had a 1986 300zx turbo - he ran it with K&N/Exaust under ~9psi (T3) for about 5 years before he wrecked it. Yes, the turbo was salvagable.

When you talk about "turbos", which turbos are you talking about and for what engines? How much psi? Nothing you said about turbos reflects my personal experience, nor did I get that impression from the people at zcar.com or supraforums.com who also do turbo builds. Where is all this coming from?

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