SOHC piston's and 91-94 cams in DOHC...S14
09-08-2005, 03:25 AM
#18
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Join Date: Sep 2004
Location: knoxville tn
Posts: 999
the problem is not in the oil and coolant passages... the problem is comming up with the front cover set up to make it all work... you end up usualy cuting your head gasket and using covers from other motors to make it all work... it has been done but it is a serious pain in the butt... a lot more work then doing the rod and pistons...
09-12-2005, 02:51 AM
#22
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Join Date: Sep 2004
Location: knoxville tn
Posts: 999
if it is worth it is up to the person doing the work... there are a few things that you need to think about befor you try the install...
first is the rest of your car up to par... meaning fuel and spark... they both have to be in top notch form befor i would suggest any one try this...
second... be ready to use premium fuel... the higher compression will knock and ping on regular gas...
and is this the only mod you are doing to the motor...
if this is done on a stock motor with no other mods... you are going to gain about 12 hp... now that is not a lot... but add to that a set of cams some head work intake work more fuel delivery and good exhaust you are looking at between 35 and 50 bhp...
if you go with an fmu or an safc you can tune a little more power out of the combo... i have seen 73 bhp come out of this install (WITH HEAD AND INTAKE WORK)...
for a na car 30 hp is quite a gain considering our cars have around 150 hp to begin with... so you decide if it is worth it or not...
remember this is a bottem end rebuild... might as well do a few other things to your motor while you have it out... replace timing chains tensioners and guides while you are at it... and it is also a good chance to clean the motor and the engine compartment...
to me it is worth it... to others it wont be...
first is the rest of your car up to par... meaning fuel and spark... they both have to be in top notch form befor i would suggest any one try this...
second... be ready to use premium fuel... the higher compression will knock and ping on regular gas...
and is this the only mod you are doing to the motor...
if this is done on a stock motor with no other mods... you are going to gain about 12 hp... now that is not a lot... but add to that a set of cams some head work intake work more fuel delivery and good exhaust you are looking at between 35 and 50 bhp...
if you go with an fmu or an safc you can tune a little more power out of the combo... i have seen 73 bhp come out of this install (WITH HEAD AND INTAKE WORK)...
for a na car 30 hp is quite a gain considering our cars have around 150 hp to begin with... so you decide if it is worth it or not...
remember this is a bottem end rebuild... might as well do a few other things to your motor while you have it out... replace timing chains tensioners and guides while you are at it... and it is also a good chance to clean the motor and the engine compartment...
to me it is worth it... to others it wont be...
Last edited by wikd240; 09-12-2005 at 02:54 AM.
09-14-2005, 10:44 AM
#23
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Join Date: Oct 2004
Location: VA
Posts: 65
Yea... rebuilds kick-***... it's like lego kits for those of us who are 18+ years old. I should add GASKETS to wikd post, oh and crank seals, butt loads of rtv silicone and such, and i think the timing chain guides can be ripped out... least that's what my nissian tech guy told me.
~eji
~eji
09-18-2005, 11:12 AM
#24
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Join Date: Sep 2004
Location: knoxville tn
Posts: 999
you can remove the upper timing chain guides that are mounted to the head... or you can get the updated versions from nissan... the set is like 75 bucks... (for people who want them back in there)
any time i do a bottem end on a car i always replace front and rear main seals... they are like 15 bucks for both of them and you have everything out already...
p.s. i start the next build up in 3 weeks... there will be pics as well as a walk through on the work i am doing... this is not my motor so it will be stock parts going into it... but i want to get it on a dyno... might have to drive up to ride revolution or something to see what it will do with each mod that is put on the car...
any time i do a bottem end on a car i always replace front and rear main seals... they are like 15 bucks for both of them and you have everything out already...
p.s. i start the next build up in 3 weeks... there will be pics as well as a walk through on the work i am doing... this is not my motor so it will be stock parts going into it... but i want to get it on a dyno... might have to drive up to ride revolution or something to see what it will do with each mod that is put on the car...
10-07-2005, 10:00 AM
#25
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Join Date: Oct 2005
Location: Jackson, TN
Posts: 7
Noob question.. already have been searching for the answer. No avail.
DOHC motor
SOHC pistons
Exhaust cams
Turbo (plus necessary equip. of course)
Would the compression be too high for this?
Would it be a better bet using a stock rebuilt KA24DE?
DOHC motor
SOHC pistons
Exhaust cams
Turbo (plus necessary equip. of course)
Would the compression be too high for this?
Would it be a better bet using a stock rebuilt KA24DE?
10-07-2005, 03:45 PM
#26
Originally posted by Enig
Noob question.. already have been searching for the answer. No avail.
DOHC motor
SOHC pistons
Exhaust cams
Turbo (plus necessary equip. of course)
Would the compression be too high for this?
Would it be a better bet using a stock rebuilt KA24DE?
Noob question.. already have been searching for the answer. No avail.
DOHC motor
SOHC pistons
Exhaust cams
Turbo (plus necessary equip. of course)
Would the compression be too high for this?
Would it be a better bet using a stock rebuilt KA24DE?
10-07-2005, 06:57 PM
#27
Contributing Member
Join Date: Jun 2003
Location: MA
Posts: 1,703
Originally posted by BigVinnie
In 94 it was the cross over to OBD2, Nissan started early on smog tech.
In 94 it was the cross over to OBD2, Nissan started early on smog tech.
Originally posted by BigVinnie
Actually the KA on forged internals will hit 8000RPM with noooo problems.........
Actually the KA on forged internals will hit 8000RPM with noooo problems.........
10-07-2005, 07:57 PM
#28
Originally posted by CowboyTurbo
Are you sure about this? I have a '95 and I could've sworn it's OBD1...
do you know where I could find a graph of the torque curve of the KA on forged internals?
Are you sure about this? I have a '95 and I could've sworn it's OBD1...
do you know where I could find a graph of the torque curve of the KA on forged internals?
Notice that when you buy a new car in September~October of the year you are currently in, it is actually scheduled as the next model year car.
That means your 95 was sold brand new off the dealers lot in sept-december of 94. That also means that your car was produced between march and august of 94. I believe in August it switched to OBD2, but not too shure on the month of production of the OBD2.
Last edited by BigVinnie; 10-07-2005 at 08:06 PM.
10-08-2005, 07:15 AM
#30
Registered User
Join Date: Oct 2005
Location: Jackson, TN
Posts: 7
Originally posted by BigVinnie
If you know that your engine is going to make more than 380WHP, I would defenitely get forged internals.
If you know that your engine is going to make more than 380WHP, I would defenitely get forged internals.
I was thinking:
SOHC internals
DOHC Block/head
Exhaust Cams
Turbo (+ equip)
No more than 300 rwhp.. and that is being generous.