Gen 1 vs Gen 2 fuel rail questions

Q&A regarding engines, turbos, and intercoolers and power upgrades

Gen 1 vs Gen 2 fuel rail questions

Postby alvinsw20 » Sat Jul 21, 2012 2:02 am


I am a MR2 guy normally over at MR2OC. Everyone on there has 2nd or 3rd gens, I have a 1st gen head and fuel setup on a 2nd gen block. The fuel rails on 2nd and 3rd gens are different than the gen 1 being side feed instead of top feed and I believe there is a difference in pulsation dampener as well. Most guys on that forum will need to mod their fuel rails or FPRs from ATS when upgrading turbos, or even replacing with a top feed fuel rail to fit larger injectors.

My question is, does the top feed gen 1 fuel rail suffer from any problems? Will I be able to simply upgrade to larger injector sizes instead of buying a wolfcatz or speed-source top feed rail?

thanks in advanced..
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Re: Gen 1 vs Gen 2 fuel rail questions

Postby tw2 » Sun Jul 22, 2012 2:16 am

From what I understand you will not need to replace the rail. Its a long time since I have seen one but from what I remember it has heaps of flow unlike the terrible gen 2 design.
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