VQ30 HP/TQ Potential
11-02-2010, 10:55 PM
#1
VQ30 HP/TQ Potential
Its been many years since this topic has been covered and I wanted to freshen up on newer data or new knowledge that we may have with this thread .
I cant come up with real 3.0 failures due to too much power/torque. I am referring to engines that have been properly tuned (not with aux injectors), actually tuning with large injectors, timing, AFR, everything on point. So have we really pushed these 3.0's to their limits?
For example, if we put some L19 head bolts, have very good engine management and enough octane and fuel injectors with a reliable and efficient turbo setup, with J&S for the hell of it. How much power would it make before it has a REAL failure such as broken rods, cracked walls(doubt it), broken crank(doubt it), broken/cracked pistons.
Most failures I have seen, even from Hal himself have been from unreliable tuning, such as using larger nitrous fuel jets, or aux injectors, etc..
Here is a thread as reference
http://forums.maxima.org/3790910-post44.html
Discuss......
I cant come up with real 3.0 failures due to too much power/torque. I am referring to engines that have been properly tuned (not with aux injectors), actually tuning with large injectors, timing, AFR, everything on point. So have we really pushed these 3.0's to their limits?
For example, if we put some L19 head bolts, have very good engine management and enough octane and fuel injectors with a reliable and efficient turbo setup, with J&S for the hell of it. How much power would it make before it has a REAL failure such as broken rods, cracked walls(doubt it), broken crank(doubt it), broken/cracked pistons.
Most failures I have seen, even from Hal himself have been from unreliable tuning, such as using larger nitrous fuel jets, or aux injectors, etc..
Here is a thread as reference
http://forums.maxima.org/3790910-post44.html
Discuss......
I have always wondered about this...
11-03-2010, 04:24 AM
#4
I think with a aftermarket headgasket, head and rod bolts the motor should be damn near bullet proof till around 450-470fwhp
Last edited by t6378tp; 11-03-2010 at 04:28 AM.
11-03-2010, 09:48 AM
#7
i think an unaltered VQ30 could hold up well @ 450-500whp on pump gas. you add in some things like methanol, race gas, and you could go higher. I think at some point in the 550-600 range the stock heads and cams will become a bottleneck though, and you'll end up with a situation where you turn the boost up more and you get no more peak power, but get a big torque number in the mid range RPMs before the ultimate flow capability of the heads/cams is reached.
even though we may not have heard about it from a member who posts here I bet there are people out there who are running that power level reliably. tuning these engines is not in it's infancy anymore like it was back in 03-06 when a lot of the OGs were doing it, there are a lot of reliability mods out there that are tried and tested now, that just weren't available back then. EU, even some standalones being used, J&S, and drop in bigger injectors so people don't have to push their luck with crazy fuel pressures and duty cycles which lead to premature injector failure/lockup. also transmission mods that will prevent the trans from breaking, so people who really want to get serious can make the kind of power the engine is capable of without worrying about breaking their transmission every week. a lot has changed in 5 years. we just don't hear about VQ30s that much anymore because lots of the OGs who used to post have moved on to other things, and a lot of the newer guys don't post much if at all. they do their research, and then just push the limit without really needing to post much because questions they would have had 5 years ago have been answered now, so we don't hear from them.
even though we may not have heard about it from a member who posts here I bet there are people out there who are running that power level reliably. tuning these engines is not in it's infancy anymore like it was back in 03-06 when a lot of the OGs were doing it, there are a lot of reliability mods out there that are tried and tested now, that just weren't available back then. EU, even some standalones being used, J&S, and drop in bigger injectors so people don't have to push their luck with crazy fuel pressures and duty cycles which lead to premature injector failure/lockup. also transmission mods that will prevent the trans from breaking, so people who really want to get serious can make the kind of power the engine is capable of without worrying about breaking their transmission every week. a lot has changed in 5 years. we just don't hear about VQ30s that much anymore because lots of the OGs who used to post have moved on to other things, and a lot of the newer guys don't post much if at all. they do their research, and then just push the limit without really needing to post much because questions they would have had 5 years ago have been answered now, so we don't hear from them.
11-03-2010, 10:13 AM
#8
11-03-2010, 10:58 AM
#10
Yeah this is true Neal, there are lots of people that do not post on here, even in other countries im sure there are some crazy VQ30's around. But for those here, we gotta step it up and see what these 3.0s can really do (Those with money, come on!! do it lol). I thought about this after building my 3.5. If I were to do it again, I may have gone with a stock 3.0 and strong head bolts. I figure 200-300 for a 3.0, plus L19's (another 300?), thats pretty much it, plus misc gaskets and stuff. Maybe not even L19's, prob just HR head bolts if they can be used on the 3.0 block (dont see why not). so less than 500 bucks for a motor that can take 400 all day, just gotta see if it can take 500, 600 all day reliably.
11-03-2010, 11:15 AM
#12
11-03-2010, 11:43 AM
#18
i have not seen this personally but a friend of mine has. there is a 4th gen in long island, NY with a fully built 3.0 turbo thats pushing 650hp. the guy works for a shop out there and he builds turbo kits for this engine and they go for around $3000.
my friend was telling me that there was some big Z meet in the mountains of VA recently and the guy was there with his 4th gen. i will get the name of the shop and post it here i don't remember of the top of my head. but this is an example of ppl pushing the limits and not posting it here.
my friend was telling me that there was some big Z meet in the mountains of VA recently and the guy was there with his 4th gen. i will get the name of the shop and post it here i don't remember of the top of my head. but this is an example of ppl pushing the limits and not posting it here.
11-03-2010, 11:48 AM
#19
i have not seen this personally but a friend of mine has. there is a 4th gen in long island, NY with a fully built 3.0 turbo thats pushing 650hp. the guy works for a shop out there and he builds turbo kits for this engine and they go for around $3000.
my friend was telling me that there was some big Z meet in the mountains of VA recently and the guy was there with his 4th gen. i will get the name of the shop and post it here i don't remember of the top of my head. but this is an example of ppl pushing the limits and not posting it here.
my friend was telling me that there was some big Z meet in the mountains of VA recently and the guy was there with his 4th gen. i will get the name of the shop and post it here i don't remember of the top of my head. but this is an example of ppl pushing the limits and not posting it here.
11-03-2010, 11:57 AM
#20
11-03-2010, 12:02 PM
#21
Yeah this is true Neal, there are lots of people that do not post on here, even in other countries im sure there are some crazy VQ30's around. But for those here, we gotta step it up and see what these 3.0s can really do (Those with money, come on!! do it lol). I thought about this after building my 3.5. If I were to do it again, I may have gone with a stock 3.0 and strong head bolts. I figure 200-300 for a 3.0, plus L19's (another 300?), thats pretty much it, plus misc gaskets and stuff. Maybe not even L19's, prob just HR head bolts if they can be used on the 3.0 block (dont see why not). so less than 500 bucks for a motor that can take 400 all day, just gotta see if it can take 500, 600 all day reliably.
My goal is 380-400hp daily and 450hp on meth for the track
11-03-2010, 12:11 PM
#22
11-03-2010, 12:36 PM
#23
the only reason I'd do a 3.0 is if I wasn't going to do anything to the motor. if you're going to open up a 3.0 you might as well go with a 3.5 because virtually everything about it is better except for the rod bolts which are an easy fix with $100 ARP rod bolts.
11-03-2010, 12:43 PM
#24
the 3.0 has an underdog status to it thou.
11-03-2010, 01:37 PM
#25
11-03-2010, 01:43 PM
#26
11-03-2010, 01:46 PM
#27
If your doing it for curiosity, go ahead and be my guess. But if you gonna open up the motor anyways, just go with the 3.5. There is no replacement for displacement.
11-03-2010, 01:48 PM
#28
11-03-2010, 03:48 PM
#29
Well im talking about just stock block alone, if we going to compare built engines then thats a whole different topic. Dont wanna start a 3.5 vs. 3.0 battle either lol. So yeah, with a stock short block, how much will a 3.0 take, thats my curiosity.
11-03-2010, 04:42 PM
#30
well my dek will be bone stock other than removing the swirl valves, power rod and porting the mouth of the intake to match the pftb
11-03-2010, 08:35 PM
#31
11-03-2010, 09:24 PM
#32
skeerrrd!!!you should throw 30 psi tune in there, ohh wait,,, rear mount bottleneck... never mind (;
vq30 stock will take 450 whp daily imo, but that would be with proper timing control and tune with dek mani.
11-03-2010, 09:33 PM
#33
rear mount bottleneck, you like pushing my buttons alvaro dont you lol. Im trying for the 20psi man but damn misfire, gotta figure that out first.
11-03-2010, 10:13 PM
#34
does the car give any codes?
11-04-2010, 03:45 AM
#36
But 1st I need to get the damn motor in the car
11-04-2010, 09:39 AM
#37
I am getting the Blazt software over the winter and will datalog some more info for jwt then send the ecu back for the final tune. I want to run stock if not advanced timing while the car is not in boost but I have to see how the car boost with the dek now.
But 1st I need to get the damn motor in the car
But 1st I need to get the damn motor in the car
Last edited by streetzlegend; 11-04-2010 at 09:41 AM.
11-04-2010, 10:42 AM
#38
I used to tune like that when i had the 3.0. Run stock timing or a little advanced before any pressure, and to be honest, its not even worth the effort in doing that, unless your turbo starts spooling up at like 5k or something ridiculous. In my opinion its best to just have your overall timing conservative, even out of boost, another reason being that us turbo guys vary in engine load, so you dont really spool exactly the same in each gear and each driving condition, unless your driving in a flat road with same car weight, traction, weather, etc... If you have stock timing or a lil advance out of boost, one day your going to come across a situation that your making boost before you thought, and end up knocking (like more weight in the car, uphill, cold day, etc...), just giving you the heads up since iv experimented with timing a little. Like Neal taught me, make power with boost not timing or lean AFR
