E85 Tune with Kooks Long tube headers advice

[Pdaddy1280]

Thinking about adding Kooks long tube headers and getting an E85 tune for my GT PP 6-speed manual and looking for advice. I know E85 is relatively hard to come by so am considering a flex-fuel kit. I’m wondering if the limited HP increase is worth the investment or if I should save up to get a supercharger later. Would a tune with headers on 93 octane give me any discernible increase at all?

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[Junkyard Dog]

Thinking about adding Kooks long tube headers and getting an E85 tune for my GT PP 6-speed manual and looking for advice. I know E85 is relatively hard to come by so am considering a flex-fuel kit. I’m wondering if the limited HP increase is worth the investment or if I should save up to get a supercharger later. Would a tune with headers on 93 octane give me any discernible increase at all?

Yes, but E85 is going to be significantly more. You can always have two tunes. If you just cannot find E85, and you are about to run out, fill it with 93 and flash the 93 tune.

It might be a little annoying, but there is no real flex fuel for the Mustang. There are tunes that adjust for ethanol content, but they are slow to adjust and you give up a lot that a real E85 tune would give you.

 

[robvas]

What is the total cost of the headers tune install etc

You could see 60+ hp out of it

 

[Ninjak]

When I had my GT350, I had Kooks LT headers and an E85 flex tune. (I had the device that would allow you to run E85 when filled up, or 93 if you ran the fuel down and filled up with it.​

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That said, I made 503 on 93, and I made 525 on the corn. It was a fun ride.​

 

[Q6543]

My car with headers and E30 picked up around 40HP average, no tune.

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