im getting a 98 civic hx motor and tranny,distributor,shift linkage,manifold all for free. now im wondering if it has as much power is a d16a6 si motor? and is it worth putting a vtec head on it? let me know thankx

 

im assuming its a d16y7.


so here are some specs

D16Y7

* Found in:
o 1996-2000 Honda Civic EX/DX/VP/LX/CX
o 1999-2000 Honda Civic Special Edition - SE(Canada)
o 1996-97 Honda del Sol S
+ Displacement : 1,593 cc (97.2 cu in)
+ Bore and Stroke : 75 mm × 90 mm (3.0 in × 3.5 in)
+ Compression : 9.4:1
+ Power : 106 hp (79 kW) @ 6400 rpm
+ Torque (lb·ft@rpm): 103 @ 4,600 rpm
+ RPM Redline : 6800 rpm 7200 gov. kicks in
+ Valvetrain : SOHC 16 valves
+ Fuel Control : OBD2 MPFI
+ Head Code : P2F
+ Piston Code : P2E
+ ECU Code : P2E

 

an hx model has a d16y5. it has vtec already and its prolly a little faster than an a6

 

so your telling me that a civic hx d16y5 has vtec already?

 

quick way to tell on the sohc, if the spark plug tubes slanted toward the front of the vehicle its vtec, if the are slanted toward the back, its non-vtec... am i right? correct me if im wrong..

 

i'm pretty sure the 96-00 ex came with a y8 vtec

 

the HX D16Y5 engine is a VTEC-E engine, 115hp (similar to the 92-95 D16Z1 VTEC-E) - the VTEC-E engine operates as a 12 valve engine (2 exhaust and 1 intake) until VTEC engagement which activates the 2nd intake valve - doesn't have a mid lobe on the camshaft to change duration and lift of the intakes like the D16Y8 and D16Z6 VTEC engines

 

so is it worth putting in my ef? and would it have the same 115hp power if i run the dpfi manifold? and how would vtec kick in?

 

any one?

 

if its all u got and money is an issue.. id say go for it, but if the motor is build for multi injection like the picture shows, im pretty sure DPFI will defintily drop the performance and power. but if i were u id look around for a d16y8 if u wanna stick to d series motors.. or do the dohc zc..

 

i want to know can i still run a vtec with dpfi?

 

any suggestions?

 

drop it in, enjoy the awesome gas mileage you'll get

 

dude that motor sucks i had a 98 hx and vtec was weak without a vtec controller and tuning.

 

its an hx,its made for mpg, its not going to be a beast but it will be an up grade and i would say go for it, later on you could always mod it and do more stuff to it then the stock pos.

 

generally that is the case (i.e. y5, y8, z6) , but the y7 is not vtec and does have the same valve cover as all the rest.

also i don't believe a dpfi int. manifold will even work on that head. the coolant passage doesn't line up. why would you ask if you can run vtec and stay dpfi? that just doesn't make any sense. not that having vtec is going to make much a difference on this "mpg" engine, but you want to stay dpfi. which means you won't be making squat for power. if you want to make an actual appreciable amount of extra hp you need mpfi, period. also you cant use a p28 or other chipped obd1 ecu to run the engine with vtec if you still had the dpfi in place. that is assuming you could even bolt up, which as i mentioned before i don't believe is possible.

If i were you i would convert to mpfi and then leave the engine as is. i wouldn't waste your money on a vtec head swap. just put it towards something else. like a b-series swap.

 

[QUOTE=D16SiHatch;36776550]generally that is the case (i.e. y5, y8, z6) , but the y7 is not vtec and does have the same valve cover as all the rest.

also i don't believe a dpfi int. manifold will even work on that head. the coolant passage doesn't line up. why would you ask if you can run vtec and stay dpfi? that just doesn't make any sense. not that having vtec is going to make much a difference on this "mpg" engine, but you want to stay dpfi. which means you won't be making squat for power. if you want to make an actual appreciable amount of extra hp you need mpfi, period. also you cant use a p28 or other chipped obd1 ecu to run the engine with vtec if you still had the dpfi in place. that is assuming you could even bolt up, which as i mentioned before i don't believe is possible.

your right i should just go to mpfi. but is the block worth building up or wut about the tranny or intake manifold are they worth keeping for any build?

 

any suggestions?

 

Anything that came for the Civic HX is made for gas mileage NOT PERFORMANCE. The block is just a 1.6 d series block which most all of them are the same, so the block yeah it's worth it, but then again you really have to ask yourself why are you building a D series? The amount of money you're going to throw at building the bottom end could have been spent on a turbo or on a b series swap which are becoming more affordable.

The tranny is geared for mpg not accleracion. You'll get great gas mileage, but in the performance department it's the opposite of what you want. If you're looking to make your car perform better but you're on a budget like I am, then i suggest swapping to mpfi. You'll notice a dramatic difference, I know it's not a b series swap, but from dpfi it's AMAZING! lol Then get a better tranny like an Si from an 88-91 civic or if you know some one who can rebuild your tranny (which these honda manual trannies are cake to crack open and swap gears, final drives etc.) then I can sell you one of the Si final drives I have. That is the only difference between the Si and DX 5 speed trannies in the 4th gen civics. If you get any tranny from a 92 to 2000 civic then you'll have to buy a hydro to cable adapter kit from hasport. They're not bad, but I'd say just replace you FD with the Si one I've got. After that you'll have a peppy little car and will be way more fun than a DPFI HX motor that won't pop vtec anyway.

that's my input. good luck.

 

Either turbo the D or swap for a B, I wouldn't waste my money building a D series unless you REALLY REALLY know what you're doing