I'm thinking about retiring my existing racecar and building a new one off a new shell.
The reason being, this one is heavy (91 si hatch) and so I'm looking to build to the limits of my class and save weight also.



The car has a b18c5 itr swap along with ats tranny and was on itb's + cams + hytech header.

I'm switching to a jrsc on the same motor and kamikaze header with some stockish cams.

But, as I change shells, I'm trying to decide what to keep and what to move to the new car.

And once I've pulled everything out for the new car, what motor should I put in here?

I'm thinking it'd be cool to try and build a hypermiler, and either keep or sell it when the time comes.
The fact that it will get awesome mileage can't hurt either way - I can commute in it.

So what motor would you guys recommend for this purpose?
In my spare bedroom I have a built dart talldeck with 95mm crank, eagle long rods, and 13:1 wiseco pistons.
I will also have a built b20 with 11.5:1 compression and a ported head.

I'm not sure either of these will be ideal, because the idea is to save gas and running 87 would be best.

Perhaps a lowly dseries low compression 87 sipper?

Anyway, let me know your thoughts.

Also, any links on hypermiling an ef or Honda in general would be awesome.

 

Ken, why do you have so much cool stuff? Every time you post something I get more and more jealous.

If you strictly want good gas mileage, the 8v HF motor is the way to go. But there is no way in hell I could drive a car with 50ish HP for any period of time. When I had the Z6 in my car with the SI trans, I drove it to macon and back. Including the autox I ran I got 41 mpg. I would imagine that a b7 with a DX trans would get close to 50 with the same mods.

 

D-series non vtec, just not an hf motor...lol.

 

If you go OBD1, Rock a D15B and if you go OBO you can do the D15 Dual point stocky. I had that in my CRX before I redid the whole car... I would get 45-46 mpgs on the freeway 450 miles per tank and better. Just an idea if you are wanting to really go for a fuel sipper.

 

Did America get the VTEC-E motors in their EG's?

Is that what came in the VX EG over there? I've seen a few people use those for gas mileage.

 

^Yes. And that is what I was going to suggest. OBD1 + VX Motor & ECU. Can't beat the stock wideband o2 and lean-burn modes. Unfortunately the VX hydro trans is a DOG. But you could always use an Si cable trans instead. Kinda the best of both worlds.

BTW: I've managed 42mpg full-tank average in my stock 89 CRX Si. There is still considerable potential in a D16A6.

 

^This. Then put a little t25 or something on it so it's not super boring. Some vx wheels with low rolling resistance tires would be sick too.

 

This is what 118mpg (104 mile average) looks like: http://www.treehugger.com/cars/modif...h-118-mpg.html

 

Thank you.

That's exactly what I was looking for.