SR20 Red Top swap
Honestly this guy is an idiot let him do whatever he wants. His the one thats going to be crying later on. The only two engines with lower displacement then the vq and are worthy of swapping into the z are the RB26 and 2jz.
guy can't even do the swap himself and he is sitting here giving us LOL's and LMAO's like he is holding the upper hand. perfect example of buyer instead of builder......
I love how some people dont know crap about cars and they sit here throwing figures at the rest of the crowd. horsepower doesn't mean ****, its all about area under the curve. at the end of the day, 3.5 is 1.5 more than 2.0. you can sit here and argue all day long, it won't change any of the FACTS against your swap. kthxbye
I love how some people dont know crap about cars and they sit here throwing figures at the rest of the crowd. horsepower doesn't mean ****, its all about area under the curve. at the end of the day, 3.5 is 1.5 more than 2.0. you can sit here and argue all day long, it won't change any of the FACTS against your swap. kthxbye
Last edited by Maxima SE; Jan 3, 2009 at 01:02 AM.
As someone already posted, the weight savings isn't going to be that large. The VQ35 with intake and exhaust manifolds, flywheel, and pulleys all attached weighed in at 329 pounds. Here is a link with the weight: http://www.engineswaptech.com/forums/thread/4976.aspx
The photos are no longer up, but I have them on file and the posted weights are exactly as reported on the scale.
A sr20det with transmission weighs in at around 490 lbs, according to SCC. That is right in line with the shipping weight of 511lbs as posted earlier, when you consider the pallet weight.
Now, I don't know how much the Nissan 6-speed weighs, but I bet it's not more than 160 pounds. Which means that the swap would a wash in terms of weight, between the two stock engines. You could lighten the SR up a bit with a stainless turbo manifold in place of the iron one, stainless downpipe, and of course a lightweight flywheel and clutch assembly. At best, I think it's safe to assume the SR could be maybe 20 to 40 pounds lighter than a stock VQ35DE depending on the turbo, exh. manifold, downpipe, intercooler, and flywheel/clutch used.
You could also keep the VQ and drop some weight with a lighter clutch and flywheel, and the difference would be negligible between it and the SR. If you boost the VQ, then you will be adding some considerable weight depending on the kit. So, it comes down to your hp goals. For a good 320-340 whp, and with the absolute minimum weight possible, then I can see someone using the SR. I think the swap and SR build would still be less than trying to get that much power out of a NA VQ35.
The SR will make this amount *fairly* reliably (this is a totally subjective term, but I wouldn't sweat that hp level for a daily driver/track toy with a healthy engine and good tune) with a a good turbo like the GT3071 or GT2871. Either will spool fairly quickly with a low boost threshold and hit up to 360 whp without having to do anything crazy or running terribly high boost (over 18 lbs). Upgraded injectors, topspeed manifold, a good stainless exh. manifold and large downpipe, spearco intercooler, Cobra MAF, and a tune by enthalpy (or some other ecu tuner) has been done with either of those turbos for the stated results without serious reliability problems.
However, while it can be done for less than an all-out NA VQ build, it cannot be done for less than just a mild FI of the VQ when you also consider the cost of the swap. There is a custom driveshaft needed, the wiring harness and dash situation to be worked out, and custom mounts. Even if you did it, what would you lose? Would you need new guages to work with the SR ecu, because the Z33 CAN and cluster will not work with the ecu. Don't forget about traction control, the HVAC, and everything else that ties into the CAN. Maybe a standalone option just for the air/fuel management of the SR is your plan, but a standalone engine management unit will certainly make this swap cost more than just boosting the VQ35DE you already have.
If you are serious about trying for anything near the 500 whp mark, then I have never seen a sr engine at the road course making that much power and also be, what I would say, anywhere near reliable. That much power can certainly be made, but even with a built block the life expectancy is short compared to just using the VQ. Even building the VQ block and using a Vortech kit will get you a car that is, I would say, more reliable than a built SR at that power level, and still for less money than the cost of building the SR to that power and swapping it. The SC'd VQ will weigh more, but what does a Vortech unit weigh total? Maybe 60lbs for the IC, lines, and unit? With that much power, it won't be an issue, and still lighter than a TT kit on the VQ. I think if you really want that much power, then the absolute lightest weight option isn't such a big deal compared to reliability, and a good build and tune with a Vortech for around 480 whp will make you a lot happier than trying to swap the SR.
Good luck.
Will
The photos are no longer up, but I have them on file and the posted weights are exactly as reported on the scale.
A sr20det with transmission weighs in at around 490 lbs, according to SCC. That is right in line with the shipping weight of 511lbs as posted earlier, when you consider the pallet weight.
Now, I don't know how much the Nissan 6-speed weighs, but I bet it's not more than 160 pounds. Which means that the swap would a wash in terms of weight, between the two stock engines. You could lighten the SR up a bit with a stainless turbo manifold in place of the iron one, stainless downpipe, and of course a lightweight flywheel and clutch assembly. At best, I think it's safe to assume the SR could be maybe 20 to 40 pounds lighter than a stock VQ35DE depending on the turbo, exh. manifold, downpipe, intercooler, and flywheel/clutch used.
You could also keep the VQ and drop some weight with a lighter clutch and flywheel, and the difference would be negligible between it and the SR. If you boost the VQ, then you will be adding some considerable weight depending on the kit. So, it comes down to your hp goals. For a good 320-340 whp, and with the absolute minimum weight possible, then I can see someone using the SR. I think the swap and SR build would still be less than trying to get that much power out of a NA VQ35.
The SR will make this amount *fairly* reliably (this is a totally subjective term, but I wouldn't sweat that hp level for a daily driver/track toy with a healthy engine and good tune) with a a good turbo like the GT3071 or GT2871. Either will spool fairly quickly with a low boost threshold and hit up to 360 whp without having to do anything crazy or running terribly high boost (over 18 lbs). Upgraded injectors, topspeed manifold, a good stainless exh. manifold and large downpipe, spearco intercooler, Cobra MAF, and a tune by enthalpy (or some other ecu tuner) has been done with either of those turbos for the stated results without serious reliability problems.
However, while it can be done for less than an all-out NA VQ build, it cannot be done for less than just a mild FI of the VQ when you also consider the cost of the swap. There is a custom driveshaft needed, the wiring harness and dash situation to be worked out, and custom mounts. Even if you did it, what would you lose? Would you need new guages to work with the SR ecu, because the Z33 CAN and cluster will not work with the ecu. Don't forget about traction control, the HVAC, and everything else that ties into the CAN. Maybe a standalone option just for the air/fuel management of the SR is your plan, but a standalone engine management unit will certainly make this swap cost more than just boosting the VQ35DE you already have.
If you are serious about trying for anything near the 500 whp mark, then I have never seen a sr engine at the road course making that much power and also be, what I would say, anywhere near reliable. That much power can certainly be made, but even with a built block the life expectancy is short compared to just using the VQ. Even building the VQ block and using a Vortech kit will get you a car that is, I would say, more reliable than a built SR at that power level, and still for less money than the cost of building the SR to that power and swapping it. The SC'd VQ will weigh more, but what does a Vortech unit weigh total? Maybe 60lbs for the IC, lines, and unit? With that much power, it won't be an issue, and still lighter than a TT kit on the VQ. I think if you really want that much power, then the absolute lightest weight option isn't such a big deal compared to reliability, and a good build and tune with a Vortech for around 480 whp will make you a lot happier than trying to swap the SR.
Good luck.
Will
Registered User
Joined: Aug 2006
Posts: 113
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From: vancouver
Let the guy do it... He is too stubborn about it. YOu guys are too nice trying to save him but he never appreciate it.
Bottom line is he won't be able to get 500hp with the swap and all others with in $6000.
Bottom line is he won't be able to get 500hp with the swap and all others with in $6000.
i have the ability to drive my modified SR powered car and jump into my G35. i would like to say that the SR is not a good match for the heavier Z33 chassis. there's just not enough response down low even in a lightweight S13 chassis. once the boost comes on though it takes off like a rocket. someone like chris can get away with it because he was using a bigger topmounted T3 series turbo and if there's a situation where he was out of the powerband he could use his skill and clutch kick to generate instant smoke. it would be frustrating to have that in a daily driving situation. oh, and good luck getting it inspected lol ugh...
when was the last time you saw an 800+rwhp sr20 powered car? the vq is far and forever light years ahead of the sr20. sr20's internals can handle about as much as a z can stock for stock. so whay throw away 1.5 liters and gobs of torque amd throttle response for an inferior motor? the only reason that theres so muh support for the sr20 is that its been around for a while..where do you think the z is going? where heading into our supra slaying days now, with many z's/g's pushing upwards of 1,000rwhp. as much as i like the sr20, it is no vq.
when was the last time you saw an 800+rwhp sr20 powered car? the vq is far and forever light years ahead of the sr20. sr20's internals can handle about as much as a z can stock for stock. so whay throw away 1.5 liters and gobs of torque amd throttle response for an inferior motor? the only reason that theres so muh support for the sr20 is that its been around for a while..where do you think the z is going? where heading into our supra slaying days now, with many z's/g's pushing upwards of 1,000rwhp. as much as i like the sr20, it is no vq.
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