who has this setup?? is this good or would a dx block be better?? im also planning to make a junkyard turbo for it too..what do you guys suggest and want i sould run?? like which ecu, harness etc?? thanks alot

 

I'm thinking the HF and DX blocks are the same except for the compression. should be a bolt on affair, just use the a6 intake and t/b.

 

Don't use HF parts for anything related to performance! The HF engine is an 8-valve engine. The A6 head is 16-valve. Not enough valve clearances in the pistons. The best thing the HF has is lightness, not performance. The HF has tiny intake runners to keep velocity up, it redlines at around 5000 rpm, everything about it was designed for fuel economy. Turbo is definately out.
HTH
chris

 

A DX or HF bottom end will work with an A6 head.

I suggest the DX head personally if your insisting on going with the 1.5l bottom end, simply because it has 4 valve cutouts in each piston which will mate to the 16 valve head properly. If you do go with the HF bottom end, you will need an adjustable cam gear so that you can adjust the timing to prevent the valves from taping the piston dome. The rods in an HF/DX/SI are all the same strength. The stroke and size of the crank jurnals are the only differences in the DX / SI bottom ends.

open for corrections because its been a while...

good luck,
steve...

 

the 1.5(HF/DX) ecu will not run the 1.6's(A6) fuel system. although they are both fuel injected only the 1.6(A6) has port injection, and the 1.5(hf/DX) has throttle body injection. you will have to change the computer, and wiring. now at my shop we have installed the A6 long block into a dx, but used the 1.5(hx/dx) intake manifold and fuel system.

if this makes no sense to you im sorry. here is some plain english.
if you want an A6 1.6 in ur car you have to use the 1.5 intake manifold, or change the computer and wiring, so you can use the A6 intake manifold.

good luck

 

WRONG!!!!!!!!!!!

SI & HF both use the same kind of injection(4 injectors)

DX/STD/LX use DPFI(2 injectors)

Although all the manifolds interchange with each other, there is only one you really would want to use(d16a6)....the HF has a tiny manifold and the dx has a gay manifold that should be ditched ASAP.....

I hate misinformation but ill give this guy(huggybear) a break since he could have confused the HF engine with the STD engine(theyre not the same)

Also...... HF block can be used with an A6 head....if you change out the pistons in the HF block, the HF has only 2 valve reliefs per piston(VS 4 on each piston in the DX/SI motors)....If you keep the HF bottom end stock and put an A6 head on it youre going to trash the head/block cause the pistons and valves will instantly collide.....

Fight Misinformation!!!!!!

 

Im assuming I didnt provide misinformation......................... right?

 

while you MIGHT be able to mate it with the help of cam gears to adjust them so the valves dont tap the pistons.....it wont help with performance and itll just be a big waste of money

 

damn you have alot of posts so please dont think im trying to start a fire here!

I did however experience better performance results with the cam timing retarted negative 3 degrees.

 

WHY would you want to use that trash when you could use a D16Y8 intake manifold?

 

i know a guy that has a 92 cx with a pnp head from a 16 valve 92 dx motor and its slow as hell but the swap works just fine. from what i remember he ran 16s.

 

if it was me id find someone throwing out there d15 any DX motor not a HF though and take it for free take the pm6 from a si plug it in in place of ur ecu take the si head if u have it or just get a d16a6 or z6 or y8 any thing u get is better than the hf manifold....ull need the throtle body also and the injecters u have now should be the same as the si uses.....ull need a head gasket and head bolts if u change the head too.....the HF exhaust also limits ur preformance alot from the header all the way back sucks alot so i would try and get at least a dx manifold if not a si or a header 4-2-1 or 4-1 but u wanna do a turbo on the car any ways so just get a dx header or what ever u can get ur hands on untill u do the turbo $$ is good to save for more HP so try and take hand outs......my d15b1 does 15.2 with only a d16y7 head header and exhaust and tortexal has a d15b1 with a d16a6 head in his hatch and with P&P and IHE can do 14s so the dx and std motors arent bad with a lil bit of $$ under 500 spent

 

Hey Eraser, thanks for dispelling the misinformation out there with the HF block. Not sure why some people have to show their ignorance. A quick look in a Helm's would quickly confirm the valve relief problem with the HF piston (as well as revealing that the rods and crank are much weaker than other D15's).

I had a quick question. I wanted to know if the HF and Si injectors were interchangeable. I thought they were (at 240cc) but I have found out that they have different part numbers. Thanks in advance.

Chas

Honda D Series
http://dseries.org