VQ37HR block limitations?

JoeD · 09-03-2009, 06:08 PM

Quote:

Originally Posted by kannibul

Besides the block, there's other limitations for RWHP - clutch/torque converter, transmission, driveshaft, differential, differential shafts/cv joints...

I will agree, however the limits of driveline components are more so a function of traction (too much of it). Given there are no issues with weakness in the driveline in stock form as you see sometimes in other cars, a Z with double/triple the stock HP won't necessarily break anything if the tires spin. Shock is what breaks parts, and that can happen in a huge HP-range.

Which begs the question...who has launched stock or bolt-on Z on proper drag-tires?

Orphan · 09-03-2009, 07:39 PM

Trans onwards is a lot easier to figure out than the engines limitations. The new 6 speed box seems to be beefy from all accounts so I don't see 500rwhp for FI applications being any real issue but stock clutch etc will have to go.

I know an engine builder near where I use to live who got 580rwhp out of an old 4L toyota v8 though it was a pretty serious build, for the same engine for street use he thinks around 480rwhp as the one he built wasn't really tuned for street use. Besides being an open deck the VQ37 is better in basically every way and makes substantially more power stock. Considering Cosworth was getting 380-400rwhp out of the VQ35 those number should be much easier with the VQ37 not to mention more usable with the VVEL.

As the stock BHP is 330ish 380-400bhp should be easy if not more. As for the M3 engine are you talking about the latest 4L V8? The problem with that engine is that its engineered to be perfect how it is and doesn't have much room to improve in its current form without going to larger valves and bigger bore etc where as the VQ37 seems to have plenty of room to move up stock.

I guess we can only wait and see but I would imagine we will see 340rwhp+ N/A in the next 6-12 months. All depends on the design of the std of the head and how far the VVEL can be pushed.

KingDavid · 09-04-2009, 05:10 PM

Quote:

Originally Posted by Orphan

Trans onwards is a lot easier to figure out than the engines limitations. The new 6 speed box seems to be beefy from all accounts so I don't see 500rwhp for FI applications being any real issue but stock clutch etc will have to go.

I know an engine builder near where I use to live who got 580rwhp out of an old 4L toyota v8 though it was a pretty serious build, for the same engine for street use he thinks around 480rwhp as the one he built wasn't really tuned for street use. Besides being an open deck the VQ37 is better in basically every way and makes substantially more power stock. Considering Cosworth was getting 380-400rwhp out of the VQ35 those number should be much easier with the VQ37 not to mention more usable with the VVEL.

As the stock BHP is 330ish 380-400bhp should be easy if not more. As for the M3 engine are you talking about the latest 4L V8? The problem with that engine is that its engineered to be perfect how it is and doesn't have much room to improve in its current form without going to larger valves and bigger bore etc where as the VQ37 seems to have plenty of room to move up stock.

I guess we can only wait and see but I would imagine we will see 340rwhp+ N/A in the next 6-12 months. All depends on the design of the std of the head and how far the VVEL can be pushed.

I/H/E and a tune.

That was done a while ago, lol.

Orphan · 09-06-2009, 12:07 AM

Got a link to this 340rwhp+ N/A 370? I remember seeing a 300rwhp+ one but can't remember how far they got it. I can't wait to see 400rwhp N/A.

EDIT: The standard 370z gear box seems more than able to handle 400-500rwhp so just a new clutch there. No idea about the diff and rest of the drive train but if your not doing really hard launches I can't see it falling apart considering how power many older vehicles can handle on the standard drive train. The clutch is the number one thing that would need to be upgrading, after that I would think the diff before getting new cv joints etc, I haven't really seen any CV joints fail its usually the actual shafts from hard launches from what I have seen.

KingDavid · 09-06-2009, 11:17 AM

Quote:

Originally Posted by Orphan

Got a link to this 340rwhp+ N/A 370? I remember seeing a 300rwhp+ one but can't remember how far they got it. I can't wait to see 400rwhp N/A.

EDIT: The standard 370z gear box seems more than able to handle 400-500rwhp so just a new clutch there. No idea about the diff and rest of the drive train but if your not doing really hard launches I can't see it falling apart considering how power many older vehicles can handle on the standard drive train. The clutch is the number one thing that would need to be upgrading, after that I would think the diff before getting new cv joints etc, I haven't really seen any CV joints fail its usually the actual shafts from hard launches from what I have seen.

My pleasure. This one is actually ~345rwhp.

Induction parts + ECU reflash dyno results

NIZMOZ · 09-07-2009, 08:06 AM

Quote:

Originally Posted by KingDavid

My pleasure. This one is actually ~345rwhp.

Induction parts + ECU reflash dyno results

On a dynojet that will be around 20 or so less. Those dynos always read high and need to be taken with a grain of salt.

KingDavid · 09-07-2009, 10:17 AM

Quote:

Originally Posted by NIZMOZ

On a dynojet that will be around 20 or so less. Those dynos always read high and need to be taken with a grain of salt.

"There are no small accidents on this circuit." -- Ayrton Senna
317.2 WHP & 247 ft/lbs TQ (Dyno Dynamics (4/22/09) | 330.2 WHP & 264.24 ft/lbs TQ (DynoJet (5/20/09))

^^^That's Semtex with no tune. That's the lowest reading dyno vs. the highest reading dyno. Maybe the Mustang dyno is the most accurate?

I dunno, I don't really care about numbers.

09-06-2009, 12:07 AM	#4 (permalink)
Orphan Base Member Join Date: Aug 2009 Location: Brisbane Posts: 13 Drives: SC400 Rep Power: 17	Got a link to this 340rwhp+ N/A 370? I remember seeing a 300rwhp+ one but can't remember how far they got it. I can't wait to see 400rwhp N/A. EDIT: The standard 370z gear box seems more than able to handle 400-500rwhp so just a new clutch there. No idea about the diff and rest of the drive train but if your not doing really hard launches I can't see it falling apart considering how power many older vehicles can handle on the standard drive train. The clutch is the number one thing that would need to be upgrading, after that I would think the diff before getting new cv joints etc, I haven't really seen any CV joints fail its usually the actual shafts from hard launches from what I have seen. Last edited by Orphan; 09-06-2009 at 12:11 AM.

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09-03-2009, 07:39 PM	#2 (permalink)
Orphan Base Member Join Date: Aug 2009 Location: Brisbane Posts: 13 Drives: SC400 Rep Power: 17	Trans onwards is a lot easier to figure out than the engines limitations. The new 6 speed box seems to be beefy from all accounts so I don't see 500rwhp for FI applications being any real issue but stock clutch etc will have to go. I know an engine builder near where I use to live who got 580rwhp out of an old 4L toyota v8 though it was a pretty serious build, for the same engine for street use he thinks around 480rwhp as the one he built wasn't really tuned for street use. Besides being an open deck the VQ37 is better in basically every way and makes substantially more power stock. Considering Cosworth was getting 380-400rwhp out of the VQ35 those number should be much easier with the VQ37 not to mention more usable with the VVEL. As the stock BHP is 330ish 380-400bhp should be easy if not more. As for the M3 engine are you talking about the latest 4L V8? The problem with that engine is that its engineered to be perfect how it is and doesn't have much room to improve in its current form without going to larger valves and bigger bore etc where as the VQ37 seems to have plenty of room to move up stock. I guess we can only wait and see but I would imagine we will see 340rwhp+ N/A in the next 6-12 months. All depends on the design of the std of the head and how far the VVEL can be pushed.