Miata Turbo Forum - Boost cars, acquire cats. - Pintle vs Bosch..what do you prefer?

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Pintle vs Bosch..what do you prefer?

So correct me if I'm wrong, but stock miata injectors are Bosch disc style. As are deatschwerks injectors such as their 600's. The rx-7 PNP's such as the 460's and the 550's are pintle style. Word is that the pintle style is the best injector type you can use, but I had better luck with the Bosch style. Is there a difference and a reasoning that you guys would use one before the other? My reason is...my 460's were cleaned, but i still got that infamous MS "pop" when turning the key on, which is said to be caused by fuel leaking past the injectors. I have heard that it was cause the injectors are cleaned with water based cleaning solution and if they sit on the shelf for a while, they rust internally a little, causing them to not seal properly. Thus, your rail stays pressurized after shutdown, so the fuel leaks past the injectors. If I put my stock injectors back in, even if they sit for months, I have no problems. Give your opinions / experiences please!

Why can't you ever break your thoughts into paragraphs?

here's what I want to see from you next time:

Quote:

So correct me if I'm wrong, but stock miata injectors are Bosch disc style. As are deatschwerks injectors such as their 600's. The rx-7 PNP's such as the 460's and the 550's are pintle style. Word is that the pintle style is the best injector type you can use, but I had better luck with the Bosch style.

Is there a difference and a reasoning that you guys would use one before the other?

My reason is...my 460's were cleaned, but i still got that infamous MS "pop" when turning the key on, which is said to be caused by fuel leaking past the injectors.

I have heard that it was cause the injectors are cleaned with water based cleaning solution and if they sit on the shelf for a while, they rust internally a little, causing them to not seal properly. ~~Thus~~So when your rail stays pressurized after shutdown, so the fuel leaks past the injectors.

If I put my stock injectors back in, even if they sit for months, I have no problems. Give your opinions / experiences please!

Get new injectors, the style of the Rx7 injectors is not preferred, seems you have bad ones.

Ok, so you're saying I should buy a brand new set of DW 600's and I shouldn't have a problem?

neither, get ev14 style injectors (example: ID750)