jdm engine
02-07-2005, 01:30 PM
#41
I agree. But to truely do a NA to turbo setup "right", you should spend some $.
Originally Posted by subs1000w
if both setups are done right with a conservative tune you wont have any reliability problems
02-07-2005, 02:29 PM
#42
Originally Posted by mtnbikeair
http://cgi.ebay.com/ebaymotors/ws/eB...950742699&rd=1
Someone needs to buy that!!!!
Someone needs to buy that!!!!
02-07-2005, 04:18 PM
#44
Originally Posted by mtcookson
i just don't see how cruising with a turbo and low compression could be less reliable than an high compression n/a engine constantly pounding the internals. the combustion chamber pressure of both would be very different when they are both at cruising speeds/throttle. now when at wot i can see the boosted engine being less reliable due to the heat and all that but a daily driven car isn't going to be at wot near as much as a race car. 
But then my friends explained to me, that turbo or supercharged motors only come onto boost at WOT which is where they make most of their power. So if you're just driving normally, there is nothing to worry about except for the excess heat that after a while, takes it's toll on hoses, wires etc.
On the other hand, if you have a bored and stroked I4 with mad compression, that thing won't last long enough for you to enjoy it; or for word to get around that you actually have a fast car.
02-07-2005, 04:50 PM
#45
MT and 5ltr. You guys are comparing almost 2 diff things. Subs said you could build 300hp with a VG and turbo. That is very true. But the 300hp na engine is built MUCH stronger. Not because it's na, but because of the stuff they built it with. Now you want to compare putting a turbo on a stock oem na VG to a fully built VG. If you granny both engines, sure they will last. But then again, why even build a na engine or turbo if you are going to granny the thing?
02-07-2005, 05:20 PM
#46
well lets say both engines are equal. same internals except that the boosted engine has low compression pistons and both are pushing 300 hp. it would still seem logical that the boosted engine would tend to last longer as a daily driver since the majority of the time the turbo engine would have less strain on the internals due to the low compression whereas the high comp engine is constantly at the higher compression ratio.
when going wot its a whole other story. with boost there tends to be more pressure in the end which is why most boosted engines create a lot more torque than the n/a engines... because you are basically increasing the displacement by putting more air in than the engine would normally be able to take in. then you also have the immense heat of the turbo system and such.
in that case, the n/a would most likely last a lot longer.
in the end though... all i know is a boosted engine is a lot more fun to drive around than n/a
when going wot its a whole other story. with boost there tends to be more pressure in the end which is why most boosted engines create a lot more torque than the n/a engines... because you are basically increasing the displacement by putting more air in than the engine would normally be able to take in. then you also have the immense heat of the turbo system and such.
in that case, the n/a would most likely last a lot longer.
in the end though... all i know is a boosted engine is a lot more fun to drive around than n/a
02-07-2005, 06:05 PM
#47
But they aren't the same.
Originally Posted by mtcookson
well lets say both engines are equal. same internals except that the boosted engine has low compression pistons and both are pushing 300 hp. it would still seem logical that the boosted engine would tend to last longer as a daily driver since the majority of the time the turbo engine would have less strain on the internals due to the low compression whereas the high comp engine is constantly at the higher compression ratio.
when going wot its a whole other story. with boost there tends to be more pressure in the end which is why most boosted engines create a lot more torque than the n/a engines... because you are basically increasing the displacement by putting more air in than the engine would normally be able to take in. then you also have the immense heat of the turbo system and such.
in that case, the n/a would most likely last a lot longer.
in the end though... all i know is a boosted engine is a lot more fun to drive around than n/a
when going wot its a whole other story. with boost there tends to be more pressure in the end which is why most boosted engines create a lot more torque than the n/a engines... because you are basically increasing the displacement by putting more air in than the engine would normally be able to take in. then you also have the immense heat of the turbo system and such.
in that case, the n/a would most likely last a lot longer.
in the end though... all i know is a boosted engine is a lot more fun to drive around than n/a
02-07-2005, 09:19 PM
#52
Originally Posted by subs1000w
JWT doesnt make an ECU for the 5th gens
02-08-2005, 01:15 PM
#53
Originally Posted by subs1000w
JWT doesnt make an ECU for the 5th gens
02-08-2005, 01:17 PM
#54
JWT DOES make ecus for the early 4 gen.
Strike TWO!
Strike TWO!
Originally Posted by 5 ltr. beater
......and they don't make them for 4th GEN's either thank god. Otherwise, VQ's would be more of a problem than they are now. (not for me though!)
02-08-2005, 02:55 PM
#55
Originally Posted by 5 ltr. beater
......and they don't make them for 4th GEN's either thank god. Otherwise, VQ's would be more of a problem than they are now. (not for me though!)
02-08-2005, 04:13 PM
#57
Originally Posted by Jeff92se
JWT DOES make ecus for the early 4 gen.
Strike TWO!
Strike TWO!
And as far as that hekimian racing engines goes. I know he made a racing VE motor. I'm going to call him tomarrow. I remember printing out the page of specs that the motor came with. I even spoke with the guy over the phone a while back. So don't be in such a rush to call a strike on that one either. I just haven't had any time lately to call (work,school, taking pics. of ECU's for Aaron..etc.etc.)
02-08-2005, 04:18 PM
#58
I'm just giving you a hard time. But JWT does make them for I think the pre-97 4-gens. That's alot of 4-gens. If Hekimian Racing did indeed make a built VE30DE motor, I'd like to know everything about it. But I would have thought it would make more than 20hp vs the built VG30 engine they have on their site. Make sure to ask them about the ecu tweaks.
02-08-2005, 04:27 PM
#59
Originally Posted by rosamax
Why aren't VQ's a problem for you, did you go out and buy an electric supercharger or something?
I haven't been beaten by a VQ yet. The closest race i had with a VQ max. was a 99 5 spd. and it had a CAI, pulley and catback. I won, but dam they are fast.
But, were all destined to loose sometime; and it's only a matter of time before i get mine handed to me by a Max on the bottle!
02-08-2005, 04:41 PM
#60
Originally Posted by Jeff92se
I'm just giving you a hard time. But JWT does make them for I think the pre-97 4-gens. That's alot of 4-gens. If Hekimian Racing did indeed make a built VE30DE motor, I'd like to know everything about it. But I would have thought it would make more than 20hp vs the built VG30 engine they have on their site. Make sure to ask them about the ecu tweaks.
And yeah, as far as that VE motor went, I swear that back in the day, it was listed on his website (8 years ago) I don't remember much, but I do remember that it was a bored out VE from 3.0 to 3.2 and it had an 11:1 comp. . I need to call him a.s.a.p. to find out what happened.
02-08-2005, 04:44 PM
#61
From what all the 4-gen guys are saying, all 4-gens were OBDII. I tend to believe that as even 1995 year maximas are using the obdII scan tools on thier cars. Now I'd be very happy to find out that they were using obdII scan tools for their OBD1 ecus. Because that would mean I could use the auterra for my car. But I very much doubt that is the case as we all know all 3-gens are OBD1.
It really makes sense that Nissan knew of the OBDII requirement and got ready for it when the all new VQ30/4-gen came out.
It really makes sense that Nissan knew of the OBDII requirement and got ready for it when the all new VQ30/4-gen came out.
02-08-2005, 06:28 PM
#63
Originally Posted by Jeff92se
From what all the 4-gen guys are saying, all 4-gens were OBDII. I tend to believe that as even 1995 year maximas are using the obdII scan tools on thier cars. Now I'd be very happy to find out that they were using obdII scan tools for their OBD1 ecus. Because that would mean I could use the auterra for my car. But I very much doubt that is the case as we all know all 3-gens are OBD1.
It really makes sense that Nissan knew of the OBDII requirement and got ready for it when the all new VQ30/4-gen came out.
It really makes sense that Nissan knew of the OBDII requirement and got ready for it when the all new VQ30/4-gen came out.
I have a 95 and it's OBDII, I would say without a doubt that there's not any OBD1 VQ maxima's running around there.
BTW: 5 ltr. beater, what does your maxima run in the 1/4 mile? Which maxima are you driving? I know your profile says you sold the '92 and still have a '94 auto.
02-08-2005, 07:03 PM
#64
Originally Posted by Jeff92se
It really makes sense that Nissan knew of the OBDII requirement and got ready for it when the all new VQ30/4-gen came out.
There is no such thing as a OBD-I 4th gen.
From my small ammount of reading I believe only the 99-present maximas do not have JWT ECU's avaliable to them. I am not sure about 2nd gen maximas.
02-08-2005, 08:55 PM
#66
Supporting Maxima.org Member
Join Date: Jan 2002
Posts: 3,371
man guys seriously if you all would just go to JWTs site and check.
jeff your right JWT only makes ECUS for 95-96 4th gens
mr gone your right in a sense because the 97-98 4th gens can use a 95-96 jwt ecu but get a CEL which i belive can be defeated somehow
99's and 00-01 are screwed
02-03 and 95-96 can get a technosqaure ecu for 495$
jeff your right JWT only makes ECUS for 95-96 4th gens
mr gone your right in a sense because the 97-98 4th gens can use a 95-96 jwt ecu but get a CEL which i belive can be defeated somehow
99's and 00-01 are screwed
02-03 and 95-96 can get a technosqaure ecu for 495$
02-08-2005, 08:59 PM
#67
Supporting Maxima.org Member
Join Date: Jan 2002
Posts: 3,371
Originally Posted by VG Ill ridah
Is there a way to convert to OBDII or I have to wait for the Zemulator (if it's produced for the VG)
02-08-2005, 10:16 PM
#69
Originally Posted by 505max94se
Are you sure about that?
Why do you think JWT only makes them for the 95-96 maxima?
Why do you think JWT only makes them for the 95-96 maxima?
Then again I dont spend any time in the 4th gen forum.
I am however 100% positive about the OBD-II
02-08-2005, 11:12 PM
#73
Originally Posted by Jeff92se
Are my posts somehow invisible?
not invisible. Just ignored... Also it was mention that 00-01 guys can't get an ECU upgrade...Technosquare can do 01 ECu's. 95-96 are the ECU's that JWT and Technosquare do but they can be used in 97 and 98 cars. with CEL and on 98 slight Modification
02-08-2005, 11:24 PM
#74
Originally Posted by Jeff92se
Are my posts somehow invisible?
I can't believe I didn't see that.
Originally Posted by MrGone
1996 was the first year it was federally required to have OBD-II on any new cars being sold. However a few manufactures equipped their vechicles with OBD-II eariler.
I couldn't remember if they told me '96 or '97 though. Now that's all cleared up....
02-08-2005, 11:40 PM
#75
'95 was a transitional year for OBD-II on alot of vehicles. I have a '95 200sx that's OBD-II and as mentioned before my '95 maxima is OBD-II. Like Mr.Gone said, it was required in '96 to have OBD-II but some cars started sooner.
02-09-2005, 07:36 PM
#76
Originally Posted by MrGone
There is no such thing as a OBD-I 4th gen.
From my small ammount of reading I believe only the 99-present maximas do not have JWT ECU's avaliable to them. I am not sure about 2nd gen maximas.
02-09-2005, 08:05 PM
#77
Supporting Maxima.org Member
Join Date: Jan 2002
Posts: 3,371
read this thread and if you still feel there are OBDI 4th gens do us all a favor and go jump off a cliff
http://forums.maxima.org/showthread.php?t=277214
http://forums.maxima.org/showthread.php?t=277214
02-09-2005, 08:49 PM
#79
Originally Posted by 5 ltr. beater
Yes there is. 95 maximas were put into production in early 94. In 95 the law was put out that all 1996 vehicles sold in the US had to be OBDII compliant. Nissan left alone the 95's and began putting OBDII on the 96's. Thats why on JWT's website, they have JWT ECU's only for the 95 Max. Not sure if it will work on a 96' even though the website says it will.
....