Nismo87SE

I don't know if anyone else has noticed this but I have. We are all familiar with what engine's make what power/torque. One thing I find strange is that the 4th gen VQ makes at the wheels what a VG30E (Z31, 2nd-3rd gen maximas) does at the crank. After looking at some 5th gen dynos it appears the 5spd makes the same power at the wheels as the 4th gen does at the crank. I have only seen one auto 4th gen put down over 170hp to the wheels without FI or NOS. However I have seen several 4th gen 5spds put down around 180-186hp at the wheels. Too bad no one wants to experiment with cams other wise I'm sure you can pick up an extra 10hp in the toppend. Hell if my VG with heads and cams could pull to the rev limiter in 3rd gear, surely a VQ with cams should pull to the limiter or close to it in 5th or gain around 500rpm extra in 4th gear?

Black VQ

It would kinda make since since they make more power at the crank, too. Could be I'm misunderstanding you, but since a 5th gen makes more crank power than a 4th gen, it's pretty obvious that it'd make more power at the wheels, too.

Shingles

No what he is saying is that the 4th gen makes the same amount of power to the wheel as the 3rd gen at the crank. And the 5th gen puts down the power rating of the 4th gen at the crank(190).

I think... hehe.

-Shing

Paul6speed

Is part of the reason.

Nismo87SE

Yea but the other weird thing is that the torque isn't that much less. With my VG30E with CAI and MAF hack (free mod for me hehe) I dynoed 153lb-ft at 3800rpm. Usually my torque peak is around 3500rpm so I bet I probably made about 154lb-ft. Once I went to hi flow cat, catback, UR UDP, 60mm TB (total cost for mods $450) I dropped 4 tenths and picked up 1.5mph. So I figured I gained about 10/10lb-ft because when I dynoed my CAI it gained 11hp/13lb-ft over my cone filter and dropped my ET's 3 tenths and added 1.5mph. This would have put me around 133-135hp/163-168lb-ft. I'm sure had I added a JWT ECU along with my ported heads, ISKY cams I would have had around 145-155hp/175-183lb-ft. Keep in mind this is with my stock exhaust manifolds and downpipe. Before I put on my TC and the heads/cams my car would stay with a stock VQ auto till I get around 5300rpm. But from 3800-5200 I would be side by side with one. Just too bad my head gasket blew, otherwise you and I would have went at it hehe .

Shingles

It's really not that weird. If you will notice, each year that there was power gain, the peak hp went up higher in the rpm range. Since they are all 3 liters, their torque output will all be fairly similar. There are two ways to make power, rev higher or more displacement. Since displacement is the same, rev higher is the other other option. And I am sure looking that the power hp rpm will prove this.

-Shing

Black VQ

A SOHC powerplant? In my dad's '89 SE it is. That would explain the diff right there. Nissan also no doubt learned some new tricks with the VQ as well so that they could be competitive in the German DTM series it was originally designed for.

Jeff92se

iTrader: (82)

Dave B

The VQ makes strong torque from 1800-4800 rpms and slowly falls off by 5200 and then drops like a brick. Hp climbs at a very linear pace. Put simply, the VQ is not a peaky engine. It pulls well from all rpms.

Dave