question about D15z1 engine
#1
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question about D15z1 engine
I currently have a 1994 honda civic vx which comes with a D15z1 engine in it. I know that the engine is Vtec-e but what I wanted to know is if I can but a D16 head on it and also some pistons or something just for now untill I get my block built. And if I can what pistons and jank like that should I use....
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#2
Re: question about D15z1 engine
i wouldn't mess with that block to much ive heard the vtec-e blocks arent very strong although you could probably do a mini-me imo work v.s return wouldnt be significant enough for me id get a z6 swap and mess with that
#4
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Re: question about D15z1 engine
you can put a z6 head but the compression will be realllly low because the z1 piston have a MASSIVE dish in em..... you can even run a safe 8psi on an z1 engine lol
#7
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Re: question about D15z1 engine
i got a z1 that held 10 psi daily driven for about 2 years. sold the kit and just to do **** i put b7 pistons and rods in. anyone know what the comp. would be then..lol
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#9
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Re: question about D15z1 engine
Hey man whats up fellow vx owner here. When i had the stock vx motor in i too though of different way to increase hp. I ended up dropping a valve @ 180k on my z1 motor while cruising down the highway, seriously i was just cruising it.
I now have a d15b (with ex tranny) with d16z6 head and y7 cam gear to correct the timing. Before i put in the y7 cam gear I ran a 16.7 e.t. @ 85 mph (same as a stock si), When i did correct the timing my car got a lot faster and vtec hit harder. I expect to hit low 16's next drag;previous drag i ran 2 times first was 16.9, 2nd was 16.7. I pulled those E.T.'s with a failing input shaft bearing in my transmission. I didn't bother to reduce the air pressure in my tires or anything like that, just went from the street to the starting line.
The whole point is i rebuilt the d15b and the z6 head for $800, and im way faster then i would have been if i put that SAME $800 into the d15z1 motor. Trust me dude, just swap out the motor for a d15b or d16z6 and start modding that engine!
I now have a d15b (with ex tranny) with d16z6 head and y7 cam gear to correct the timing. Before i put in the y7 cam gear I ran a 16.7 e.t. @ 85 mph (same as a stock si), When i did correct the timing my car got a lot faster and vtec hit harder. I expect to hit low 16's next drag;previous drag i ran 2 times first was 16.9, 2nd was 16.7. I pulled those E.T.'s with a failing input shaft bearing in my transmission. I didn't bother to reduce the air pressure in my tires or anything like that, just went from the street to the starting line.
The whole point is i rebuilt the d15b and the z6 head for $800, and im way faster then i would have been if i put that SAME $800 into the d15z1 motor. Trust me dude, just swap out the motor for a d15b or d16z6 and start modding that engine!
#10
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Re: question about D15z1 engine
dont try a head swap, it wont be worth it. compression will be too low as stated before. not to mention the insanely long gear'd trans.
#11
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Re: question about D15z1 engine
ya dont do a head swap. The D15Z1 head has a 25mm chamber. While all the rest of them are 32+mm. Which makes the CR low as ****. Drop in a Z6 or a D15B (basically the same engine, Z6 is better IMO).
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Re: question about D15z1 engine
according to this site a z1 with a z6 head nets a compression ratio of 6.48:1 way to low for anything
http://www.zealautowerks.com/dseries.html
http://www.zealautowerks.com/dseries.html
#14
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Re: question about D15z1 engine
yes low compression is good for boost, but the explosion happening in the cylinder instead of the head is not. and thats how the z1/y5 were designed. the piston takes most of the force from the detonation, not the head. in a z1/y5 the head is basically flat, no chamber.
#15
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Re: question about D15z1 engine
yes low compression is good for boost, but the explosion happening in the cylinder instead of the head is not. and thats how the z1/y5 were designed. the piston takes most of the force from the detonation, not the head. in a z1/y5 the head is basically flat, no chamber.
#17
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Re: question about D15z1 engine
Hey man whats up fellow vx owner here. When i had the stock vx motor in i too though of different way to increase hp. I ended up dropping a valve @ 180k on my z1 motor while cruising down the highway, seriously i was just cruising it.
I now have a d15b (with ex tranny) with d16z6 head and y7 cam gear to correct the timing. Before i put in the y7 cam gear I ran a 16.7 e.t. @ 85 mph (same as a stock si), When i did correct the timing my car got a lot faster and vtec hit harder. I expect to hit low 16's next drag;previous drag i ran 2 times first was 16.9, 2nd was 16.7. I pulled those E.T.'s with a failing input shaft bearing in my transmission. I didn't bother to reduce the air pressure in my tires or anything like that, just went from the street to the starting line.
The whole point is i rebuilt the d15b and the z6 head for $800, and im way faster then i would have been if i put that SAME $800 into the d15z1 motor. Trust me dude, just swap out the motor for a d15b or d16z6 and start modding that engine!
I now have a d15b (with ex tranny) with d16z6 head and y7 cam gear to correct the timing. Before i put in the y7 cam gear I ran a 16.7 e.t. @ 85 mph (same as a stock si), When i did correct the timing my car got a lot faster and vtec hit harder. I expect to hit low 16's next drag;previous drag i ran 2 times first was 16.9, 2nd was 16.7. I pulled those E.T.'s with a failing input shaft bearing in my transmission. I didn't bother to reduce the air pressure in my tires or anything like that, just went from the street to the starting line.
The whole point is i rebuilt the d15b and the z6 head for $800, and im way faster then i would have been if i put that SAME $800 into the d15z1 motor. Trust me dude, just swap out the motor for a d15b or d16z6 and start modding that engine!
#18
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Re: question about D15z1 engine
just buy a JDM D15b, put your ex trans on it and call it a day. those motors are like $495 before shipping. why wouldnt you buy one?
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#21
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Re: question about D15z1 engine
the z6 has more oil passages for the bearings than the y8 from what i have read. prolly why the y8's always spin bearings.
#22
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Re: question about D15z1 engine
i havent ever heard anything like that. As far as i know all the blocks are the same on the inside. and what about Y8's always spinning bearings? i havent heard anything about Y8's spinning bearings.
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