Can you get to 400 without turbo or super-charger

kannibul · 06-18-2009, 08:59 AM

Quote:

Originally Posted by MightyBobo

Im just guessing here since Im a bit new to the VQ world (but quite knowledgeable in the LSX SBC world)...but you'd probably need...more than likely, the best of the best bolt-ons, and some internals for this. Heads, headers-back, a DECENT intake, custom-ground cams and upgraded valvetrain to match, maybe swap your bottom end for something a bit higher in compression. Cant forget your fuel system (pump/injectors), and a tune to go with it.

The price would be quite high, more than likely.

On the other hand, going boosted the safe (and "correct", to many) way would be to swap to a nice forged bottom end, upgrade your fuel system, and get a nice intercooled turbo/supercharger kit. That'd probably last a long time, assuming its all installed correctly. Oh yeah, and beef up that tranny and potentially your rear end if you plan on launching it ever...

This kind of work is common place in the SBC world, and people can, now-a-days, fairly easily put down close to 500 to the wheels in their N/A F-bodies and C5 Vettes for minimal cost. But with these VQ motors, finding aftermarket manufacturers for a lot of the parts would probably be quite difficult, and/or prone to raping your wallet of funds lol.

Technically speaking, the engine in the 370z doesn't have a camshaft. It does have an eccentric shaft.

MightyBobo · 06-18-2009, 10:03 AM

Quote:

Originally Posted by kannibul

Technically speaking, the engine in the 370z doesn't have a camshaft. It does have an eccentric shaft.

That post was made well before I even owned my 370 heh - I didn't even realize the VVEL system was in it, much less how it worked at the time.

None the less, you are correct

tolnep · 06-19-2009, 03:10 PM

drop in 12.5 to 13:1 compression pistons...

have the heads stage III or stage IV prepped..

custom high lift cams, springs retainers to handle..

10,000 rpm or thereabouts.

balance the crap out of the motor..

i assume custom tune/standalone.. and of course a hand built exhaust from the exhaust ports back..

run race gas (you can get 100 octane no-lead) or 105 octane e85 (adjust fuel lines, pumps and injectors as neded)..

the thing is its about the amount of combustible energy you can get into the thing in a specific period of time, since you dont go turbo or supercharged, to get the requisite combustible materials into the motor in the same amount of time, you gotta spin that sucker faster..

add a low gear ring and pinion to make it work on the street..

and about he small blocks having more stuff available cheaper.. they've been around more than 50 years.. 50 YEARS.. and have simply evolved. there is a tremendous market for parts and thats why there's so much more..

if i was gonna look for more power out of the 370.. first hunt would be for a super charger. cosworth came out for one for the miata.. i think its about 5k, i would assume eventually similar products we bel available for the Z, thats probably the easiest and safest way to get your 'instant on' powa....

CBRich · 06-19-2009, 05:12 PM

Quote:

Originally Posted by tolnep

custom high lift cams, springs retainers to handle..

Best of luck with that.

And on topic I've seen B16 Honda engines make 200 N/A whp but it took so much money and tuning it was stupid. Would have been cheaper and made more power with FI. I think the same will hold true near the 400 whp range for the Z.

MightyBobo · 06-19-2009, 07:39 PM

Quote:

Originally Posted by CBRich

Best of luck with that.

And on topic I've seen B16 Honda engines make 200 N/A whp but it took so much money and tuning it was stupid. Would have been cheaper and made more power with FI. I think the same will hold true near the 400 whp range for the Z.

FWIW, my buddy has a 4-door Integra he races (not a Type R at all). His motor is all made by himself, and it was cheap, and I believe it put out 210 or 220 WHP or so. It was impressive, TBH.

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06-19-2009, 03:10 PM	#3 (permalink)
tolnep Base Member Join Date: Apr 2009 Location: teluria Posts: 30 Drives: 20 mule team waggon Rep Power: 18	drop in 12.5 to 13:1 compression pistons... have the heads stage III or stage IV prepped.. custom high lift cams, springs retainers to handle.. 10,000 rpm or thereabouts. balance the crap out of the motor.. i assume custom tune/standalone.. and of course a hand built exhaust from the exhaust ports back.. run race gas (you can get 100 octane no-lead) or 105 octane e85 (adjust fuel lines, pumps and injectors as neded).. the thing is its about the amount of combustible energy you can get into the thing in a specific period of time, since you dont go turbo or supercharged, to get the requisite combustible materials into the motor in the same amount of time, you gotta spin that sucker faster.. add a low gear ring and pinion to make it work on the street.. and about he small blocks having more stuff available cheaper.. they've been around more than 50 years.. 50 YEARS.. and have simply evolved. there is a tremendous market for parts and thats why there's so much more.. if i was gonna look for more power out of the 370.. first hunt would be for a super charger. cosworth came out for one for the miata.. i think its about 5k, i would assume eventually similar products we bel available for the Z, thats probably the easiest and safest way to get your 'instant on' powa....