Re: JD's assault on a 50+ mpg daily driver.
 

i want info on the ls build damn it.

and what mpg are you looking to get?

Re: JD's assault on a 50+ mpg daily driver.
 

See thread title

Re: JD's assault on a 50+ mpg daily driver.
 

yeah just saw that, lol. :1

Re: JD's assault on a 50+ mpg daily driver.
 

I rocked the HX head many moons ago and enlightened Jago on the powa of the "vtec-E" :6

Re: JD's assault on a 50+ mpg daily driver.
 

Really? I thought it would be lower rpm-oriented, since they are rated at 44 mpg in the 5 spd heavysut HX.

It's basically a GX, FWIW, and the CR will be 12.5:1. I am strongly considering a T25 at some point but I don't think I'll be able to stay with 87 octane if I go that way. Maybe E85, if we get more than one pump in the county?

Re: JD's assault on a 50+ mpg daily driver.
 

so whats wrong with the piston ?? and what kind of piston was it ??

Re: JD's assault on a 50+ mpg daily driver.
 

Don't know?

Make your guess and I'll make mine, whoever is right gets $100 from the other.

Hmm..........I guess that they were fucked due to detonation.

Re: JD's assault on a 50+ mpg daily driver.
 

They are visibly detonation scarred on the quench pads, the ring lands are slopped out, they are beat and represented as 100% fine nothing wrong with them + being sold because he was too lazy/pigheaded to send a block to the machine shop and wanted some stock bore pistons. A week, week and a half later he has a FS thread for his freshly honed 75.5mm block. I broach the subject of the piston's condition immediately, he wanted me to file a claim with USPS payable to me, WHICH ALMOST A YEAR LATER I CAN ASSURE YOU IS A GUARANTEED WAY TO NEVER GET PAID, as a number of vendors have since discussed with me when I broached the subject.

Re: JD's assault on a 50+ mpg daily driver.
 

god damn if i wasnt talking to chris yesterday about a vtec-e/closed loop wideband/forged internal/uber-lean burn build


...i got 34.5 mpg in my turbo ls and it really got me thinking about what i could do for mpg if i really tried to build something with that in mind. Keep us updated on your progress so i can copy it and say it was all my idea later.

Re: JD's assault on a 50+ mpg daily driver.
 

It was good at every RPM range. Gotta love those roller rockers too to rev it a bit higher if you want, although I really don't.

I used it before on a stock Z6 block, now it's on a 7.5:1 CR vitara/TT Z6 block. It's still awesome. I never had any of the Y series timing issues that you talked about a lot either.